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WISE 1828+2650

Coordinates: Sky map 18h 28m 31.10s, +26° 50′ 37.79″
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This is an old revision of this page, as edited by Chermundy (talk | contribs) at 10:18, 31 October 2012 (Chermundy moved page WISE 1828+2650 to WISEPA J182831.08+265037.8: full designation). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

WISEPA J182831.08+265037.8

Infrared image from WISE satellite. WISE 1828+2650 is circled green dot at the centre.
Observation data
Epoch MJD 55467.61[1]      Equinox J2000[1]
Constellation Template:Constel
Right ascension 18h 28m 31.10s[1]
Declination 26° 50′ 37.79″[1]
Characteristics
Spectral type ≥Y2[2]
Apparent magnitude (J (MKO filter system)) 23.57 ± 0.35[1]
Apparent magnitude (H (MKO filter system)) 22.85 ± 0.24[1]
Astrometry
Proper motion (μ) RA: 1078 ± 327[1] mas/yr
Dec.: 118 ± 409[1] mas/yr
Parallax (π)122 ± 13 mas[2][3]
Distanceapprox. 27 ly
(approx. 8.2 pc)
Details
Temperature≤300[4] K
Other designations
WISEPA J182831.08+265037.8[1]
WISEP J1828+2650[4]
WISE J1828+2650[1]
WISE 1828+2650[1]

WISEPA J182831.08+265037.8 (designation is abbreviated to WISE 1828+2650) is a brown dwarf of spectral class ≥Y2,[2] located in constellation Template:Constel at approximately 27 light-years from Earth.[2][3] It is the "archetypal member" of the Y spectral class.[4]

Discovery

WISE 1828+2650 was discovered in 2011 from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. WISE 1828+2650 has two discovery papers: Kirkpatrick et al. (2011) and Cushing et al. (2011), however, basically with the same authors and published nearly simultaneously.[1][4] Kirkpatrick et al. presented discovery of 98 new found by WISE brown dwarf systems with components of spectral types M, L, T and Y, among which also was WISE 1828+2650 — coolest of them.[1][note 1] Cushing et al. presented discovery of seven brown dwarfs — one of T9.5 type, and six of Y-type — first members of the Y spectral class, ever discovered and spectroscopically confirmed, including "archetypal member" of the Y spectral class — WISE 1828+2650.[4] This seven objects are also the faintest seven of 98 brown dwarfs, presented in Kirkpatrick et al. (2011).[1]

Spectral class

With a temperature below 300 K[4], WISE 1828+2650 is currently the coolest known brown dwarf. It has been assigned the latest known spectral class (≥Y2,[2] initially estimated as >Y0[4]).

Distance

Initially (in 2011) photometric distance estimate of this object was <9.4 pc (<30.7 ly).[1] In 2012 was published its trigonometric parallax: 0.122 ± 0.013 arcsecond, corresponding to a distance 8.2+1.0
−0.8 pc, or 26.7+3.2
−2.6 ly.[2][3]

WISE 1828+2650 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Kirkpatrick et al., 2011, Table 6 <9.4 <30.7 [1]
Beichman et al., 2012 122 ± 13 8.2+1.0
−0.8		 26.7+3.2
−2.6		 [3][2]

Non-trigonometric distance estimates are marked in italic. The most precise estimate is marked in bold.

See also

The other six discoveries of brown dwarfs, published in Cushing et al. (2011):[4]

Notes

  1. ^ This 98 brown dwarf systems are only among first, not all brown dwarf systems, discovered from data, collected by WISE: six discoveries were published earlier (however, also listed in Kirkpatrick et al. (2011)) in Mainzer et al. (2011) and Burgasser et al. (2011), and the other discoveries were published later.

References

  1. ^ a b c d e f g h i j k l m n o p Cite error: The named reference Kirkpatrick2011 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Kirkpatrick2012 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Beichman2012 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference Cushing2011 was invoked but never defined (see the help page).

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  • Choi, Charles Q. (August 26, 2011). "Y dwarf star? Because they're cool, that's Y!". Space.com. Retrieved August 31, 2011.
  • NASA news release
  • Science news
  • Infrared image of WISE 1828+2650 at Astronomy Picture of the Day, 2011 August 30
  • Solstation.com (New Objects within 20 light-years)
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