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Coordinates: Sky map 02h 26m 51.0583s, +37° 33′ 01.7377″
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{{Short description|Star in the constellation Andromeda}}
{{Starbox begin
{{Starbox begin
| name = HD 15082
| name = HD 15082
}}
{{Starbox image
| image = [[Image:V807AndLightCurve.png|250px]]
| caption = A [[light curve]] for V807 Andromedae (HD 15082), plotted from ''[[Transiting Exoplanet Survey Satellite|TESS]]'' data.<ref name=MAST/> The deep minima are caused by the planet transits.
}}
}}
{{Starbox observe
{{Starbox observe
| epoch = J2000
| epoch = J2000
| ra = {{RA|02|26|51.0583}}<ref name="Gaia DR2"/>
| ra = {{RA|02|26|51.0583}}<ref name="Gaia DR3"/>
| dec = {{DEC|+37|33|01.7377}}<ref name="Gaia DR2"/>
| dec = {{DEC|+37|33|01.736}}<ref name="Gaia DR3"/>
| appmag_v = 8.3<ref name=aaa526_L10/>
| appmag_v = 8.3<ref name=aaa526_L10/>
| constell = [[Andromeda (constellation)|Andromeda]]
| constell = [[Andromeda (constellation)|Andromeda]]
}}
}}
{{Starbox character
{{Starbox character
| class = {{nowrap|kA5hA8mF4}}<ref name="cameron2010" />
| class = A5<ref name=EPE/>
| b-v = 0.27<ref name=TYCHO/>
| b-v = 0.27<ref name=TYCHO/>
| u-b =
| u-b =
| r-i =
| r-i =
| variable = [[Delta Scuti variable|δ Sct]]<ref name=aaa526_L10/>+Planetary transit variable
| variable = [[Delta Scuti variable|δ Sct]]<ref name=aaa526_L10/>+Planetary transit variable
}}
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = {{val|-9.20|2.8}}<ref name=Gontcharov2006/>
| radial_v = {{val|-9.20|2.8}}<ref name=Gontcharov2006/>
| prop_mo_ra = {{val|−0.976|0.118}}<ref name="Gaia DR2"/>
| prop_mo_ra = {{val|−0.977|(35)}}
| prop_mo_dec = {{val|−8.977|0.105}}<ref name="Gaia DR2"/>
| prop_mo_dec = {{val|−8.895|(34)}}
| pm_footnote = <ref name="Gaia DR3"/>
| parallax = 8.1724
| parallax = 8.2238
| p_error = 0.0661
| p_error = 0.0327
| parallax_footnote = <ref name="Gaia DR2"/>
| parallax_footnote = <ref name="Gaia DR3"/>
| absmag_v =
| absmag_v =
}}
}}
{{Starbox detail
{{Starbox detail
| mass = {{nowrap|1.55 ± 0.04}}<ref name="cameron2010"/>
| mass = 1.55{{±|0.04}}<ref name="cameron2010"/>
| radius = 1.51<ref name=Goyal2018/>
| radius = 1.51<ref name=Goyal2018/>
| luminosity =
| luminosity =
| gravity = {{nowrap|4.3 ± 0.2}}<ref name=aaa526_L10/>
| gravity = 4.3{{±|0.2}}<ref name=aaa526_L10/>
| temperature = {{nowrap|7,400 ± 200}}<ref name=aaa526_L10/>
| temperature = 7,400{{±|200}}<ref name=aaa526_L10/>
| metal_fe = {{nowrap|0.1 ± 0.2}}<ref name="cameron2010"/>
| metal_fe = 0.1{{±|0.2}}<ref name="cameron2010"/>
| rotational_velocity = 86<ref name=aaa526_L10/>
| rotational_velocity = 86<ref name=aaa526_L10/>
| age_myr = 100<ref name=aaa535_A110/>
| age_myr = 100<ref name=aaa535_A110/>
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}}
}}
{{Starbox end}}
{{Starbox end}}
⚫
'''HD 15082''' (also known as '''WASP-33''') is a [[star]] located roughly 399 [[light year]]s away<ref name="Gaia DR2"/> in the northern constellation of [[Andromeda (constellation)|Andromeda]].<ref>{{cite web|url=http://var2.astro.cz/ETD/etd.php?STARNAME=WASP-33&PLANET=b|title=WASP-33 b|work=ETD - Exoplanet Transit Database|accessdate=2010-04-28}}</ref> The star is a [[Delta Scuti variable]]<ref name=Essen2014/> and a planetary transit variable. A [[hot Jupiter]] type [[Exoplanet|extrasolar planet]], named [[WASP-33b]] or HD 15082b, orbits this star with an orbital period of 1.22&nbsp;days. It is the first Delta Scuti variable known to host a planet.<ref name=sd20110119/>


⚫
'''HD 15082''' (also known as '''WASP-33''') is a [[star]] located roughly 397 [[light year]]s away<ref name="Gaia DR3"/> in the northern constellation of [[Andromeda (constellation)|Andromeda]].<ref name=WASP/> The star is a [[Delta Scuti variable]]<ref name=Essen2014/> and a planetary transit variable. A [[hot Jupiter]] type [[Exoplanet|extrasolar planet]], named [[WASP-33b]] or HD 15082b, orbits this star with an orbital period of 1.22&nbsp;days. It is the first Delta Scuti variable known to host a planet.<ref name=sd20110119/>
==Spectrum==
⚫
HD 15082 is an [[Am star]], which makes its [[stellar classification]] challenging to discern. The [[spectral lines|hydrogen lines]] and [[effective temperature]] of the star are similar to spectral type A8, however the [[calcium K-line|calcium II K line]] resembles that of an A5 star, and the metallic lines are more similar to an F4 star. The spectral type is thus written kA5hA8mF4.<ref name="cameron2010" />


==Pulsations==
==Properties==
⚫
HD 15082 is an [[Am star]], which makes its [[stellar classification]] challenging to discern. The [[spectral lines|hydrogen lines]] and [[effective temperature]] of the star are similar to spectral type A8, however the [[calcium K-line|calcium II K line]] resembles that of an A5 star, and the metallic lines are more similar to an F4 star. The spectral type is written kA5hA8mF4.<ref name="cameron2010" /> The star is about 100<ref name=aaa535_A110/>&nbsp;million years old and is spinning with a [[projected rotational velocity]] of 86&nbsp;km/s.<ref name=aaa526_L10/> It has 1.55<ref name="cameron2010"/> times the mass of the Sun and 1.51 times the Sun's radius.<ref name=Goyal2018/>
⚫
Delta Scuti variables usually exhibit many [[Asteroseismology|pulsation modes]], and HD 15082 is no exception, with 8 measured high frequency p-modes.<ref name=Essen2014/> Another proposed non-radial mode, which could be induced by tidal interactions with the planet, would make this star also a [[Gamma Doradus variable]].<ref name="cameron2010"/> This star has the GCVS variable star designation '''V807 Andromedae'''. <ref>http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=V807+And</ref>

⚫
The intrinsic variability of HD 15082 was discoved in 2011 by Enrique Herrero ''et al.''<ref name=aaa526_L10/> Delta Scuti variables usually exhibit many [[Asteroseismology|pulsation modes]], and HD 15082 is no exception, with 8 measured high frequency p-modes.<ref name=Essen2014/> Another proposed non-radial mode, which could be induced by tidal interactions with the planet, would make this star also a [[Gamma Doradus variable]].<ref name="cameron2010"/> This star has the GCVS variable star designation '''V807 Andromedae'''. <ref name=GCVSQF/>


==Planetary system==
==Planetary system==
In 2010, the [[SuperWASP]] project announced the discovery of an [[extrasolar planet]], designated [[WASP-33b]], orbiting the star. The discovery was made by detecting the [[transit (astronomy)|transit]] of the planet as it passes in front of its star, an event which occurs every 1.22&nbsp;days.
In 2006, the [[SuperWASP]] project announced the discovery of an [[extrasolar planet]], designated [[WASP-33b]], orbiting the star. The discovery was made by detecting the [[transit (astronomy)|transit]] of the planet as it passes in front of its star, an event which occurs every 1.22&nbsp;days.<ref name="Christian"/>


{{OrbitboxPlanet begin|table_ref=<ref name="cameron2010" /><ref name="Zhang2017"/><ref group="note">Parameters from the photometric + radial velocity solution in table 3 of Cameron ''et al.'' (2010). Different analysis methods result in slightly different parameters, see Cameron ''et al.'' (2010) for details.</ref>}}
{{OrbitboxPlanet begin|table_ref=<ref name="cameron2010" /><ref name="Zhang2017"/><ref group="note">Parameters from the photometric + radial velocity solution in table 3 of Cameron ''et al.'' (2010). Different analysis methods result in slightly different parameters, see Cameron ''et al.'' (2010) for details.</ref>}}
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{{reflist|refs=
{{reflist|refs=


<ref name=EPE>exoplanet.eu. "Planet WASP-33 b." ''The Extrasolar Planet Encyclopaedia - WASP-33 b'', https://exoplanet.eu/catalog/wasp_33_b--671/ </ref>
⚫
<ref name=aaa526_L10>{{citation | display-authors=1 | last1=Herrero | first1=E. | last2=Morales | first2=J. C. | last3=Ribas | first3=I. | last4=Naves | first4=R. | title=WASP-33: the first δ Scuti exoplanet host star | journal=Astronomy and Astrophysics | volume=526 | pages=L10 |date=February 2011 | doi=10.1051/0004-6361/201015875 | bibcode=2011A&A...526L..10H |arxiv = 1010.1173 | s2cid=37446555 | url=https://digital.csic.es/bitstream/10261/37201/1/aa15875-10.pdf }}</ref>


<ref name=GCVSQF>{{Cite web|url=http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=V807+And|title = GCVS Query forms}}</ref>
<ref name=aaa535_A110>{{citation | display-authors=1 | last1=Moya | first1=A. | last2=Bouy | first2=H. | last3=Marchis | first3=F. | last4=Vicente | first4=B. | last5=Barrado | first5=D. | title=High spatial resolution imaging of the star with a transiting planet WASP-33 | journal=Astronomy & Astrophysics | volume=535 | page=A110 |date=November 2011 | doi=10.1051/0004-6361/201116889 | bibcode=2011A&A...535A.110M |arxiv = 1110.3160 | s2cid=54591538 }}</ref>


<ref name=WASP>{{cite web|url=http://var2.astro.cz/ETD/etd.php?STARNAME=WASP-33&PLANET=b|title=WASP-33 b|work=ETD - Exoplanet Transit Database|access-date=2010-04-28}}</ref>
⚫
<ref name="cameron2010">{{cite journal | bibcode=2010MNRAS.407..507C | title=Line-profile tomography of exoplanet transits - II. A gas-giant planet transiting a rapidly rotating A5 star | display-authors=1 | last1=Collier Cameron | first1=A. | last2=Guenther | first2=E. | last3=Smalley | first3=B. | last4=McDonald | first4=I. | last5=Hebb | first5=L. | last6=Andersen | first6=J. | last7=Augusteijn | first7=Th. | last8=Barros | first8=S. C. C. | last9=Brown | first9=D. J. A. | volume=407 | issue=1 | year=2010 | pages=507 | journal=[[Monthly Notices of the Royal Astronomical Society]] | doi=10.1111/j.1365-2966.2010.16922.x |arxiv = 1004.4551 | s2cid=11989684 }}</ref>


<ref name=MAST>{{cite web |title=MAST: Barbara A. Mikulski Archive for Space Telescopes |url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html |publisher=Space Telescope Science Institute |access-date=8 December 2021}}</ref>
⚫
<ref name="Gaia DR2">{{Cite Gaia DR2|328636019723252096}}</ref>


<ref name="Christian">{{cite journal |last1=Christian |first1=D. J. |last2=Pollacco |first2=D. L. |last3=Skillen |first3=I. |last4=Street |first4=R. A. |last5=Keenan |first5=F. P. |last6=Clarkson |first6=W. I. |last7=Collier Cameron |first7=A. |last8=Kane |first8=S. R. |last9=Lister |first9=T. A. |last10=West |first10=R. G. |last11=Enoch |first11=B. |last12=Evans |first12=A. |last13=Fitzsimmons |first13=A. |last14=Haswell |first14=C. A. |last15=Hellier |first15=C. |last16=Hodgkin |first16=S. T. |last17=Horne |first17=K. |last18=Irwin |first18=J. |last19=Norton |first19=A. J. |last20=Osborne |first20=J. |title=The SuperWASP wide-field exoplanetary transit survey: candidates from fields 23 h < RA < 03 h |journal=Monthly Notices of the Royal Astronomical Society |date=November 2006 |volume=372 |issue=3 |pages=1117–1128 |doi=10.1111/j.1365-2966.2006.10913.x |doi-access=free |bibcode=2006MNRAS.372.1117C |url=https://articles.adsabs.harvard.edu/pdf/2006MNRAS.372.1117C |access-date=10 November 2024|hdl=10211.3/172060 |hdl-access=free }}</ref>
⚫
<ref name=sd20110119>{{citation | work=Science Daily | url=http://www.spacedaily.com/reports/Discovery_Of_A_Pulsating_Star_That_Hosts_A_Giant_Planet_999.html | title=Discovery Of A Pulsating Star That Hosts A Giant Planet | date=January 19, 2011 }}</ref>


<ref name="Zhang2017">{{cite journal | arxiv=1710.07642 | title=Phase curves of WASP-33b and HD 149026b and a New Correlation Between Phase Curve Offset and Irradiation Temperature | journal=The Astronomical Journal | volume=155 | issue=2 | pages=83 | last1=Zhang | first1=Michael | last2=Knutson | first2=Heather A | last3=Kataria | first3=Tiffany | last4=Schwartz | first4=Joel C | last5=Cowan | first5=Nicolas B | last6=Showman | first6=Adam P | last7=Burrows | first7=Adam | last8=Fortney | first8=Jonathan J | last9=Todorov | first9=Kamen | last10=Desert | first10=Jean-Michel | last11=Agol | first11=Eric | last12=Deming | first12=Drake | display-authors=1 | year=2017 | doi=10.3847/1538-3881/aaa458 | bibcode=2018AJ....155...83Z | s2cid=54755276 }}</ref>
<ref name=aaa526_L10>{{cite journal | display-authors=1 | last1=Herrero | first1=E. | last2=Morales | first2=J. C. | last3=Ribas | first3=I. | last4=Naves | first4=R. | title=WASP-33: the first δ Scuti exoplanet host star | journal=Astronomy and Astrophysics | volume=526 | pages=L10 |date=February 2011 | doi=10.1051/0004-6361/201015875 | bibcode=2011A&A...526L..10H |arxiv = 1010.1173 | s2cid=37446555 }}</ref>


⚫
<ref name=aaa535_A110>{{cite journal | display-authors=1 | last1=Moya | first1=A. | last2=Bouy | first2=H. | last3=Marchis | first3=F. | last4=Vicente | first4=B. | last5=Barrado | first5=D. | title=High spatial resolution imaging of the star with a transiting planet WASP-33 | journal=Astronomy & Astrophysics | volume=535 | page=A110 |date=November 2011 | doi=10.1051/0004-6361/201116889 | bibcode=2011A&A...535A.110M |arxiv = 1110.3160 | s2cid=54591538 }}</ref>
⚫
<ref name=Gontcharov2006>{{citation

⚫
<ref name="cameron2010">{{cite journal | bibcode=2010MNRAS.407..507C | title=Line-profile tomography of exoplanet transits - II. A gas-giant planet transiting a rapidly rotating A5 star | display-authors=1 | last1=Collier Cameron | first1=A. | last2=Guenther | first2=E. | last3=Smalley | first3=B. | last4=McDonald | first4=I. | last5=Hebb | first5=L. | last6=Andersen | first6=J. | last7=Augusteijn | first7=Th. | last8=Barros | first8=S. C. C. | last9=Brown | first9=D. J. A. | volume=407 | issue=1 | year=2010 | pages=507 | journal=[[Monthly Notices of the Royal Astronomical Society]] | doi=10.1111/j.1365-2966.2010.16922.x | doi-access=free |arxiv = 1004.4551 | s2cid=11989684 }}</ref>

⚫
<ref name="Gaia DR3">{{Cite Gaia DR3|328636019723252096}}</ref>

⚫
<ref name=sd20110119>{{cite web | work=Science Daily | url=http://www.spacedaily.com/reports/Discovery_Of_A_Pulsating_Star_That_Hosts_A_Giant_Planet_999.html | title=Discovery Of A Pulsating Star That Hosts A Giant Planet | date=January 19, 2011 }}</ref>

<ref name="Zhang2017">{{cite journal | arxiv=1710.07642 | title=Phase curves of WASP-33b and HD 149026b and a New Correlation Between Phase Curve Offset and Irradiation Temperature | journal=The Astronomical Journal | volume=155 | issue=2 | pages=83 | last1=Zhang | first1=Michael | last2=Knutson | first2=Heather A | last3=Kataria | first3=Tiffany | last4=Schwartz | first4=Joel C | last5=Cowan | first5=Nicolas B | last6=Showman | first6=Adam P | last7=Burrows | first7=Adam | last8=Fortney | first8=Jonathan J | last9=Todorov | first9=Kamen | last10=Desert | first10=Jean-Michel | last11=Agol | first11=Eric | last12=Deming | first12=Drake | display-authors=1 | year=2017 | doi=10.3847/1538-3881/aaa458 | bibcode=2018AJ....155...83Z | s2cid=54755276 | doi-access=free }}</ref>

⚫
<ref name=Gontcharov2006>{{cite journal
| last1=Gontcharov | first1=G. A.
| last1=Gontcharov | first1=G. A.
| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
| journal=Astronomy Letters | postscript=.
| journal=Astronomy Letters
| volume=32| issue=11| pages=759–771| date=November 2006
| volume=32| issue=11| pages=759–771| date=November 2006
| doi = 10.1134/S1063773706110065 | bibcode=2006AstL...32..759G
| doi = 10.1134/S1063773706110065 | bibcode=2006AstL...32..759G
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}}</ref>
}}</ref>


<ref name=TYCHO>{{citation
<ref name=TYCHO>{{cite journal
| last1=Høg | first1=E. | last2=Fabricius | first2=C.
| last1=Høg | first1=E. | last2=Fabricius | first2=C.
| last3=Makarov | first3=V. V. | last4=Urban | first4=S.
| last3=Makarov | first3=V. V. | last4=Urban | first4=S.
Line 98: Line 114:
| last7=Bastian | first7=U. | last8=Schwekendiek | first8=P.
| last7=Bastian | first7=U. | last8=Schwekendiek | first8=P.
| last9=Wicenec | first9=A.
| last9=Wicenec | first9=A.
| title=The Tycho-2 catalogue of the 2.5 million brightest stars
| title=The Tycho-2 catalogue of the 2.5 million brightest stars
| journal=Astronomy & Astrophysics
| journal=Astronomy & Astrophysics
| volume=355 | pages=L27–L30 | year=2000
| volume=355 | pages=L27–L30 | year=2000
| bibcode=2000A&A...355L..27H | postscript=. }}</ref>
| bibcode=2000A&A...355L..27H }}</ref>


<ref name=Goyal2018>{{cite journal|bibcode=2018MNRAS.474.5158G|title=A library of ATMO forward model transmission spectra for hot Jupiter exoplanets|journal=Monthly Notices of the Royal Astronomical Society|volume=474|issue=4|pages=5158|last1=Goyal|first1=Jayesh M.|last2=Mayne|first2=Nathan|last3=Sing|first3=David K.|last4=Drummond|first4=Benjamin|last5=Tremblin|first5=Pascal|last6=Amundsen|first6=David S.|last7=Evans|first7=Thomas|last8=Carter|first8=Aarynn L.|last9=Spake|first9=Jessica|last10=Baraffe|first10=Isabelle|last11=Nikolov|first11=Nikolay|last12=Manners|first12=James|last13=Chabrier|first13=Gilles|last14=Hebrard|first14=Eric|year=2018|doi=10.1093/mnras/stx3015|arxiv=1710.10269|hdl=10871/30324|s2cid=55105931|hdl-access=free}}</ref>
<ref name=Goyal2018>{{cite journal|bibcode=2018MNRAS.474.5158G|title=A library of ATMO forward model transmission spectra for hot Jupiter exoplanets|journal=Monthly Notices of the Royal Astronomical Society|volume=474|issue=4|pages=5158|last1=Goyal|first1=Jayesh M.|last2=Mayne|first2=Nathan|last3=Sing|first3=David K.|last4=Drummond|first4=Benjamin|last5=Tremblin|first5=Pascal|last6=Amundsen|first6=David S.|last7=Evans|first7=Thomas|last8=Carter|first8=Aarynn L.|last9=Spake|first9=Jessica|last10=Baraffe|first10=Isabelle|last11=Nikolov|first11=Nikolay|last12=Manners|first12=James|last13=Chabrier|first13=Gilles|last14=Hebrard|first14=Eric|year=2018|doi=10.1093/mnras/stx3015|doi-access=free |arxiv=1710.10269|hdl=10871/30324|s2cid=55105931|hdl-access=free}}</ref>


<ref name=Essen2014>{{cite journal|bibcode=2014A&A...561A..48V|title=Pulsation analysis and its impact on primary transit modeling in WASP-33|journal=Astronomy and Astrophysics|volume=561|pages=A48|last1=von Essen|first1=C.|last2=Czesla|first2=S.|last3=Wolter|first3=U.|last4=Breger|first4=M.|last5=Herrero|first5=E.|last6=Mallonn|first6=M.|last7=Ribas|first7=I.|last8=Strassmeier|first8=K. G.|last9=Morales|first9=J. C.|year=2014|arxiv=1311.3614|doi=10.1051/0004-6361/201322453|s2cid=119213599}}</ref>
<ref name=Essen2014>{{cite journal|bibcode=2014A&A...561A..48V|title=Pulsation analysis and its impact on primary transit modeling in WASP-33|journal=Astronomy and Astrophysics|volume=561|pages=A48|last1=von Essen|first1=C.|last2=Czesla|first2=S.|last3=Wolter|first3=U.|last4=Breger|first4=M.|last5=Herrero|first5=E.|last6=Mallonn|first6=M.|last7=Ribas|first7=I.|last8=Strassmeier|first8=K. G.|last9=Morales|first9=J. C.|year=2014|arxiv=1311.3614|doi=10.1051/0004-6361/201322453|s2cid=119213599}}</ref>
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{{Stars of Andromeda}}
{{Stars of Andromeda}}


{{DEFAULTSORT:HD 15082}}

<!-- Properties -->
⚫
[[Category:Andromeda (constellation)]]
⚫
[[Category:Henry Draper Catalogue objects|015082]]
⚫
[[Category:Hipparcos objects|011397]]
[[Category:A-type main-sequence stars]]
[[Category:A-type main-sequence stars]]
[[Category:Delta Scuti variables]]
[[Category:Delta Scuti variables]]
[[Category:Planetary systems with one confirmed planet]]
[[Category:Planetary systems with one confirmed planet]]
[[Category:Planetary transit variables]]
[[Category:Planetary transit variables]]
<!-- Position/catalogues -->
⚫
[[Category:Andromeda (constellation)]]
[[Category:Durchmusterung objects]]
[[Category:Durchmusterung objects]]
⚫
[[Category:Henry Draper Catalogue objects|015082]]
⚫
[[Category:Hipparcos objects|011397]]
[[Category:Objects with variable star designations|Andromedae, V807]]
[[Category:Wide Angle Search for Planets|33]]
[[Category:Wide Angle Search for Planets|33]]
[[Category:2MASS objects|J02265106+3733017V807]]
[[Category:2MASS objects|J02265106+3733017V807]]

Latest revision as of 21:53, 23 November 2024

HD 15082

A light curve for V807 Andromedae (HD 15082), plotted from TESS data.[1] The deep minima are caused by the planet transits.
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 02h 26m 51.0583s[2]
Declination +37° 33′ 01.736″[2]
Apparent magnitude (V) 8.3[3]
Characteristics
Spectral type A5[4]
B−V color index 0.27[5]
Variable type δ Sct[3]+Planetary transit variable
Astrometry
Radial velocity (Rv)−9.20±2.8[6] km/s
Proper motion (μ) RA: −0.977(35) mas/yr[2]
Dec.: −8.895(34) mas/yr[2]
Parallax (π)8.2238 ± 0.0327 mas[2]
Distance397 ± 2 ly
(121.6 ± 0.5 pc)
Details
Mass1.55±0.04[7] M☉
Radius1.51[8] R☉
Surface gravity (log g)4.3±0.2[3] cgs
Temperature7,400±200[3] K
Metallicity [Fe/H]0.1±0.2[7] dex
Rotational velocity (v sin i)86[3] km/s
Age100[9] Myr
Other designations
V807 And, BD+36 489, HD 15082, HIP 11397, SAO 55561, WASP-33, 2MASS J02265106+3733017, Gaia DR2 328636019723252096
Database references
SIMBADdata

HD 15082 (also known as WASP-33) is a star located roughly 397 light years away[2] in the northern constellation of Andromeda.[10] The star is a Delta Scuti variable[11] and a planetary transit variable. A hot Jupiter type extrasolar planet, named WASP-33b or HD 15082b, orbits this star with an orbital period of 1.22 days. It is the first Delta Scuti variable known to host a planet.[12]

Properties

[edit]

HD 15082 is an Am star, which makes its stellar classification challenging to discern. The hydrogen lines and effective temperature of the star are similar to spectral type A8, however the calcium II K line resembles that of an A5 star, and the metallic lines are more similar to an F4 star. The spectral type is written kA5hA8mF4.[7] The star is about 100[9] million years old and is spinning with a projected rotational velocity of 86 km/s.[3] It has 1.55[7] times the mass of the Sun and 1.51 times the Sun's radius.[8]

The intrinsic variability of HD 15082 was discoved in 2011 by Enrique Herrero et al.[3] Delta Scuti variables usually exhibit many pulsation modes, and HD 15082 is no exception, with 8 measured high frequency p-modes.[11] Another proposed non-radial mode, which could be induced by tidal interactions with the planet, would make this star also a Gamma Doradus variable.[7] This star has the GCVS variable star designation V807 Andromedae. [13]

Planetary system

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In 2006, the SuperWASP project announced the discovery of an extrasolar planet, designated WASP-33b, orbiting the star. The discovery was made by detecting the transit of the planet as it passes in front of its star, an event which occurs every 1.22 days.[14]

The HD 15082 planetary system[7][15][note 1]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b < 4.59 MJ 0.02558 (± 0.00023) 1.21987089 ± 1.5×10−07 0 87.67° 1.438 RJ

Notes

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  1. ^ Parameters from the photometric + radial velocity solution in table 3 of Cameron et al. (2010). Different analysis methods result in slightly different parameters, see Cameron et al. (2010) for details.

References

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  1. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  2. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ^ a b c d e f g Herrero, E.; et al. (February 2011). "WASP-33: the first δ Scuti exoplanet host star". Astronomy and Astrophysics. 526: L10. arXiv:1010.1173. Bibcode:2011A&A...526L..10H. doi:10.1051/0004-6361/201015875. S2CID 37446555.
  4. ^ exoplanet.eu. "Planet WASP-33 b." The Extrasolar Planet Encyclopaedia - WASP-33 b, https://exoplanet.eu/catalog/wasp_33_b--671/
  5. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy & Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H.
  6. ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  7. ^ a b c d e f Collier Cameron, A.; et al. (2010). "Line-profile tomography of exoplanet transits - II. A gas-giant planet transiting a rapidly rotating A5 star". Monthly Notices of the Royal Astronomical Society. 407 (1): 507. arXiv:1004.4551. Bibcode:2010MNRAS.407..507C. doi:10.1111/j.1365-2966.2010.16922.x. S2CID 11989684.
  8. ^ a b Goyal, Jayesh M.; Mayne, Nathan; Sing, David K.; Drummond, Benjamin; Tremblin, Pascal; Amundsen, David S.; Evans, Thomas; Carter, Aarynn L.; Spake, Jessica; Baraffe, Isabelle; Nikolov, Nikolay; Manners, James; Chabrier, Gilles; Hebrard, Eric (2018). "A library of ATMO forward model transmission spectra for hot Jupiter exoplanets". Monthly Notices of the Royal Astronomical Society. 474 (4): 5158. arXiv:1710.10269. Bibcode:2018MNRAS.474.5158G. doi:10.1093/mnras/stx3015. hdl:10871/30324. S2CID 55105931.
  9. ^ a b Moya, A.; et al. (November 2011). "High spatial resolution imaging of the star with a transiting planet WASP-33". Astronomy & Astrophysics. 535: A110. arXiv:1110.3160. Bibcode:2011A&A...535A.110M. doi:10.1051/0004-6361/201116889. S2CID 54591538.
  10. ^ "WASP-33 b". ETD - Exoplanet Transit Database. Retrieved 2010-04-28.
  11. ^ a b von Essen, C.; Czesla, S.; Wolter, U.; Breger, M.; Herrero, E.; Mallonn, M.; Ribas, I.; Strassmeier, K. G.; Morales, J. C. (2014). "Pulsation analysis and its impact on primary transit modeling in WASP-33". Astronomy and Astrophysics. 561: A48. arXiv:1311.3614. Bibcode:2014A&A...561A..48V. doi:10.1051/0004-6361/201322453. S2CID 119213599.
  12. ^ "Discovery Of A Pulsating Star That Hosts A Giant Planet". Science Daily. January 19, 2011.
  13. ^ "GCVS Query forms".
  14. ^ Christian, D. J.; Pollacco, D. L.; Skillen, I.; Street, R. A.; Keenan, F. P.; Clarkson, W. I.; Collier Cameron, A.; Kane, S. R.; Lister, T. A.; West, R. G.; Enoch, B.; Evans, A.; Fitzsimmons, A.; Haswell, C. A.; Hellier, C.; Hodgkin, S. T.; Horne, K.; Irwin, J.; Norton, A. J.; Osborne, J. (November 2006). "The SuperWASP wide-field exoplanetary transit survey: candidates from fields 23 h < RA < 03 h". Monthly Notices of the Royal Astronomical Society. 372 (3): 1117–1128. Bibcode:2006MNRAS.372.1117C. doi:10.1111/j.1365-2966.2006.10913.x. hdl:10211.3/172060. Retrieved 10 November 2024.
  15. ^ Zhang, Michael; et al. (2017). "Phase curves of WASP-33b and HD 149026b and a New Correlation Between Phase Curve Offset and Irradiation Temperature". The Astronomical Journal. 155 (2): 83. arXiv:1710.07642. Bibcode:2018AJ....155...83Z. doi:10.3847/1538-3881/aaa458. S2CID 54755276.


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