Asset Publisher

A candidate redshift z≈10 galaxy and rapid changes in that population at an age of 500Myr

A candidate redshift z≈10 galaxy and rapid changes in that population at an age of 500Myr

Publication date: 26 January 2011

Authors: Bouwens, R.J., et al.

Journal: Nature
Volume: 469
Issue: 7331
Page: 504-507
Year: 2011

Copyright: © 2011 Nature Publishing Group

Searches for very-high-redshift galaxies over the past decade have yielded a large sample of more than 6000 galaxies existing just 900-2000 million years (Myr) after the Big Bang (redshifts 6>z>3). The Hubble Ultra Deep Field (HUDF09) data have yielded the first reliable detections of z~8 galaxies that, together with reports of a gamma-ray burst at z~8.2, constitute the earliest objects reliably reported to date. Observations of z~7-8 galaxies suggest substantial star formation at z>9-10. Here we use the full two-year HUDF09 data to conduct an ultra-deep search for z~10 galaxies in the heart of the reionization epoch, only 500 Myr after the Big Bang. Not only do we find one possible z ~10 galaxy candidate, but we show that, regardless of source detections, the star formation rate density is much smaller (~10%) at this time than it is just ~200 Myr later at z~8. This demonstrates how rapid galaxy build-up was at z~10, as galaxies increased in both luminosity density and volume density from z~10 to z~8. The 100-200 Myr before z~10 is clearly a crucial phase in the assembly of the earliest galaxies.

Link to publication
Last Update: Sep 1, 2019 8:58:04 AM
28-Sep-2021 10:33 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/s/w7yOq08

Images And Videos

Related Publications

Related Links

Documentation