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{{Short description|Galaxy in constellation Coma Berenices}}
{{Infobox Galaxy
{{Infobox Galaxy
| name = IOK-1
| name = IOK-1
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| epoch = [[J2000]]
| epoch = [[J2000]]
| type = LAE
| type = LAE
| ra = {{RA|13|23|59.8}}
| ra = {{RA|13|23|59.8}}<ref name=SIMBAD>{{cite simbad|title=IOK 1|access-date=2023-07-31}}</ref>
| dec = {{DEC|+27|24|56}}
| dec = {{DEC|+27|24|56}}<ref name=SIMBAD/>
| dist_ly = {{convert|12.88|e9ly|Gpc|lk=on}}
| dist_ly = {{convert|12.88|e9ly|Gpc|lk=on}}
| z = 6.96
| z = 6.964<ref name=SIMBAD/>
| appmag_v = 24.4
| appmag_v = 24.4
⚫
| size_v =
| constellation name = [[Coma Berenices]]
| constellation name = [[Coma Berenices]]
| notes =
| notes =
| names = JEM2013 62, OIK2017 NB973-SDF-85821, OMS2009 SDF-63544<ref name=SIMBAD/>
| names =
| size = {{convert|4000|ly|pc|abbr=on|lk=on}} (diameter) <br /> {{convert|2000|ly|pc|abbr=on|lk=on}} <br />(radius)
⚫
| size_v = 0.001 x 0.001
}}
}}


'''IOK-1''' is a distant [[galaxy]] in the [[constellation]] [[Coma Berenices]]. When discovered in 2006, it was the oldest and most distant galaxy ever found, at [[redshift]] 6.96.<ref>{{Citation |last=Hogan |first=Jenny |year=2006 |title=Journey to the birth of the Universe |journal=[[Nature (journal)|Nature]] |volume=443 |issue=7108 |pages=128–129 |doi=10.1038/443128a |pmid=16971914 |bibcode = 2006Natur.443..128H |doi-access=free }}</ref>
'''IOK-1''' is a distant [[galaxy]] in the [[constellation]] [[Coma Berenices]]. When discovered in 2006, it was the oldest and most distant galaxy ever found, at [[redshift]] 6.96.<ref>{{Citation |last=Hogan |first=Jenny |year=2006 |title=Journey to the birth of the Universe |journal=[[Nature (journal)|Nature]] |volume=443 |issue=7108 |pages=128–129 |doi=10.1038/443128a |pmid=16971914 |bibcode = 2006Natur.443..128H |doi-access=free }}</ref>


It was discovered in April 2006 by [[Masanori Iye]] at [[National Astronomical Observatory of Japan]] using the [[Subaru Telescope]] in [[Hawaii]] and seen as it was 12.88 [[1,000,000,000 (number)|billion]] years ago. Its emission of [[Lyman alpha radiation]] has a redshift of 6.96, corresponding to just 750 million years after the [[Big Bang]]. While some scientists have claimed other objects (such as [[Galaxy Abell 1835 IR1916|Abell 1835 IR1916]]) to be even older, the IOK-1's age and composition have been more reliably established.<ref>{{Citation |last=Iye |first=Masanori |last2=Ota |first2=Kazuaki |last3=Kashikawa |first3=Nobunari |last4=Furusawa |first4=Hisanori |last5=Hashimoto |first5=Tetsuya |last6=Hattori |first6=Takashi |last7=Matsuda |first7=Yuichi |last8=Morokuma |first8=Tomoki |last9=Ouchi |first9=Masami |year=2006 |title=A galaxy at a redshift z = 6.96 |journal=Nature |volume=443 |issue=7108 |pages=186–188 |doi=10.1038/nature05104 |pmid=16971942 |arxiv=astro-ph/0609393v1 |bibcode=2006Natur.443..186I|display-authors=9 |last10=Shimasaku |first10=Kazuhiro }}</ref><ref>{{Citation |publisher=National Astronomical Observatory of Japan |date=September 13, 2006 |title=Press release |url=http://www.subarutelescope.org/Pressrelease/2006/09/13/index.html }}</ref>
It was discovered in April 2006 by [[Masanori Iye]] at [[National Astronomical Observatory of Japan]] using the [[Subaru Telescope]] in [[Hawaii]] and is seen as it was 12.88 [[1,000,000,000 (number)|billion]] years ago. Its emission of [[Lyman alpha radiation]] has a redshift of 6.96, corresponding to just 750 million years after the [[Big Bang]]. While some scientists have claimed other objects (such as [[Galaxy Abell 1835 IR1916|Abell 1835 IR1916]]) to be even older, the IOK-1's age and composition have been more reliably established.<ref>{{Citation |last1=Iye |first1=Masanori |last2=Ota |first2=Kazuaki |last3=Kashikawa |first3=Nobunari |last4=Furusawa |first4=Hisanori |last5=Hashimoto |first5=Tetsuya |last6=Hattori |first6=Takashi |last7=Matsuda |first7=Yuichi |last8=Morokuma |first8=Tomoki |last9=Ouchi |first9=Masami |year=2006 |title=A galaxy at a redshift z = 6.96 |journal=Nature |volume=443 |issue=7108 |pages=186–188 |doi=10.1038/nature05104 |pmid=16971942 |arxiv=astro-ph/0609393v1 |bibcode=2006Natur.443..186I|display-authors=9 |last10=Shimasaku |first10=Kazuhiro |s2cid=2876103 }}</ref><ref>{{Citation |publisher=National Astronomical Observatory of Japan |date=September 13, 2006 |title=Press release |url=http://www.subarutelescope.org/Pressrelease/2006/09/13/index.html }}</ref>


"IOK" stands for the observers' names Iye, Ota, and Kashikawa.
"IOK" stands for the observers' names Iye, Ota, and Kashikawa.
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{{s-aft|after=[[GRB 090423]]}}
{{s-aft|after=[[GRB 090423]]}}
{{s-bef|before=[[SDF J132522.3+273520]]}}
{{s-bef|before=[[SDF J132522.3+273520]]}}
{{s-ttl|title=[[List of galaxies#Farthest galaxies|Most distant galaxy]]|years=2006–2011}}
{{s-ttl|title=[[List of galaxies#Most distant galaxies|Most distant galaxy]]|years=2006–2011}}
{{s-aft|after=[[BDF-3299]]}}
{{s-aft|after=[[BDF-3299]]}}
{{s-end}}
{{s-end}}
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{{Coma Berenices|state=collapsed}}
{{Coma Berenices|state=collapsed}}


{{DEFAULTSORT:IOK-1}}
[[Category:Galaxies]]
[[Category:Galaxies]]
[[Category:Coma Berenices (constellation)]]
[[Category:Coma Berenices]]

Latest revision as of 00:35, 2 March 2024

IOK-1
IOK-1 by the Subaru Telescope
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension13h 23m 59.8s[1]
Declination+27° 24′ 56″[1]
Redshift6.964[1]
Distance12.88 billion light-years (3.95 Gpc)
Apparent magnitude (V)24.4
Characteristics
TypeLAE
Size4,000 ly (1,200 pc) (diameter)
2,000 ly (610 pc)
(radius)
Apparent size (V)0.001 x 0.001
Other designations
JEM2013 62, OIK2017 NB973-SDF-85821, OMS2009 SDF-63544[1]

IOK-1 is a distant galaxy in the constellation Coma Berenices. When discovered in 2006, it was the oldest and most distant galaxy ever found, at redshift 6.96.[2]

It was discovered in April 2006 by Masanori Iye at National Astronomical Observatory of Japan using the Subaru Telescope in Hawaii and is seen as it was 12.88 billion years ago. Its emission of Lyman alpha radiation has a redshift of 6.96, corresponding to just 750 million years after the Big Bang. While some scientists have claimed other objects (such as Abell 1835 IR1916) to be even older, the IOK-1's age and composition have been more reliably established.[3][4]

"IOK" stands for the observers' names Iye, Ota, and Kashikawa.

See also

[edit]

References

[edit]
  1. ^ a b c d "IOK 1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-07-31.
  2. ^ Hogan, Jenny (2006), "Journey to the birth of the Universe", Nature, 443 (7108): 128–129, Bibcode:2006Natur.443..128H, doi:10.1038/443128a, PMID 16971914
  3. ^ Iye, Masanori; Ota, Kazuaki; Kashikawa, Nobunari; Furusawa, Hisanori; Hashimoto, Tetsuya; Hattori, Takashi; Matsuda, Yuichi; Morokuma, Tomoki; Ouchi, Masami; et al. (2006), "A galaxy at a redshift z = 6.96", Nature, 443 (7108): 186–188, arXiv:astro-ph/0609393v1, Bibcode:2006Natur.443..186I, doi:10.1038/nature05104, PMID 16971942, S2CID 2876103
  4. ^ Press release, National Astronomical Observatory of Japan, September 13, 2006
Preceded by Most distant astronomical object
2006–2009 		Succeeded by
Preceded by Most distant galaxy
2006–2011 		Succeeded by
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