EGS-zs8-1

EGS-zs8-1
EGS-zs8-1 viewed by the Hubble Space Telescope
Observation data (J2000[1] epoch)
ConstellationBoötes[1]/Ursa Major
Right ascension14h 20m 34.89s[1]
Declination+53° 00′ 15.4″[1]
Redshift7.7[1]
Heliocentric radial velocity2,098,548 km/s (1,303,977 mi/s)
Galactocentric velocity2,098,671 km/s (1,304,054 mi/s)
Distance13.1 billion ly (4.0 billion pc) (light travel distance)
29.5 billion ly (9.0 billion pc)
(comoving distance)
Apparent magnitude (V)25.3J
Characteristics
TypeLyman-break galaxy
Mass8×109 M
Size15 kly (diameter)
Apparent size (V)0.004 x 0.0018
Other designations
GCF2012 8053, CANDELS J142034.88+530015.1, SSTSL2 J142034.90+530015.1, SYM2017 9104

EGS-zs8-1 is a high-redshift Lyman-break galaxy found at the northern constellation of Boötes.[2] In May 2015, EGS-zs8-1 had the highest spectroscopic redshift of any known galaxy, meaning EGS-zs8-1 was the most distant and the oldest galaxy observed.[3][4] In July 2015, EGS-zs8-1 was surpassed by EGSY8p7 (EGSY-2008532660).[citation needed]

  1. ^ a b c d e "Astronomers Set a New Galaxy Distance Record - Fast Facts". HubbleSite. 5 May 2015. STScI-2015-22. Retrieved 9 May 2015.
  2. ^ Oesch, P.A.; et al. (3 May 2015). "A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z=7.730 using Keck/MOSFIRE". The Astrophysical Journal. 804 (2): L30. arXiv:1502.05399. Bibcode:2015ApJ...804L..30O. doi:10.1088/2041-8205/804/2/L30. S2CID 55115344.
  3. ^ Villard, Ray; Chou, Felicia (5 May 2015). "Astronomers Set a New Galaxy Distance Record". HubbleSite. Retrieved 7 May 2015.
  4. ^ Cite error: The named reference AP was invoked but never defined (see the help page).