In today’s guest post, Ziad Sakr discusses the role of ultrafaint galaxies in cosmic reionization.
By searching for Lyman-alpha emission lines, astronomers have confirmed one of the most distant galaxies yet, helping shed light on the very earliest galaxies and their formation.
The authors use a deep survey to locate rare galaxies which were among the earliest to form.
Gamma-ray bursts are the most energetic explosions in the Universe. Today, we discuss how to use one GRB as a beacon to study the properties of a high redshift galaxy, the composition of the gas in the intergalactic medium at high redshift and the formation of dust in the Universe.
Huang et al. dig up evidence that distant “red nugget” galaxies grew into the massive ellipticals we see today by consuming smaller, gas-poor galaxies.
In this article, the authors measure the stellar mass-metallicity relation for star forming galaxies ranging to z~2.3. They find that mass-metallicity relationship for these galaxies evolves with time and also that it flattens at late times.