HUDF-JD2

HUDF-JD2 is a galaxy that was found in the Hubble Ultra Deep Field with the help of the infrared camera from the Hubble Space Telescope .

An initial investigation showed that it could be a galaxy eight times larger than our Milky Way and about 12.8 billion light years ( redshift 6.5) away. We see a picture of this galaxy from a time shortly after the Big Bang , when it was only a few hundred million years old. The size of the galaxy and its age cannot be explained by common theories of galaxy evolution. It should have grown much faster than previously assumed and then suddenly the star formation would have stopped.

The following observations suggest that it could also be a dusty starburst galaxy with a redshift of 2.

Individual evidence

↑ Mobasher, B. et al .: Evidence for a massive poststarbust galaxy at z ~ 6.5 . In: The Astrophysical Journal . tape 635 , no. 2 , 2005, p. 832–844 , doi : 10.1086 / 497626 , arxiv : astro-ph / 0509768 , bibcode : 2005ApJ ... 635..832M .
↑ Giant galaxy in the young universe. Retrieved September 1, 2019 .
↑ Chary, R.-R. et al .: Hubble Ultra Deep Field-JD2: Mid-Infrared Evidence for az ~ 2 Luminous Infrared Galaxy . In: The Astrophysical Journal . tape 665 , no. 1 , 2007, p. 257–264 , doi : 10.1086 / 519243 , arxiv : 0705.0660 , bibcode : 2007ApJ ... 665..257C .

[1] Mobasher, B. et al .: Evidence for a massive poststarbust galaxy at z ~ 6.5 . In: The Astrophysical Journal . tape 635 , no. 2 , 2005, p. 832–844 , doi : 10.1086 / 497626 , arxiv : astro-ph / 0509768 , bibcode : 2005ApJ ... 635..832M .

[2] Giant galaxy in the young universe. Retrieved September 1, 2019 .

[3] Chary, R.-R. et al .: Hubble Ultra Deep Field-JD2: Mid-Infrared Evidence for az ~ 2 Luminous Infrared Galaxy . In: The Astrophysical Journal . tape 665 , no. 1 , 2007, p. 257–264 , doi : 10.1086 / 519243 , arxiv : 0705.0660 , bibcode : 2007ApJ ... 665..257C .