astrobites
galaxy evolution
A rare chance to observe the merger of two star-forming galaxies
A team of researchers present multiwavelength observations of a rare merger between two massive, gas-rich starburst galaxies at a redshift of 2.3. This kind of merger could help explain the presence of the most massive elliptical galaxies at high redshift.
Digging up “red nuggets” in local elliptical galaxies
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.
Moving mesh code AREPO may help us understand galaxy evolution better than before
Moving mesh code AREPO looks like it will help astronomers understand the physics of galaxy formation and evolution better than its predecessors, due to an innovative new method of solving the fluid dynamics equations in astrophysical settings. This paper discusses the differences between AREPO and another code called GADGET in the case of gas accretion onto galaxies.
The mass assembly of Milky Way-like galaxies
The central question of this Letter is how and when the Milky Way assembled its stellar mass. This issue is addressed by tracing the formation history of spiral galaxies which closely resemble the Milky Way.
Tracking the Chemical Evolution of Galaxies Over the Last 11 Billion Years
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.
The Top 12 of 2012
What were astronomers reading and talking about in their research last year? Check out figures from the top 12 most-cited astronomy papers from 2012 (so far) and find out what researchers were up to and why!
Mapping star formation in galaxies using slitless spectroscopy
A team of astronomers working on the 3D-HST survey make use of the Hubble Space Telescope’s grism to observe star formation as a function of radius in a large sample of galaxies at intermediate redshift.
Active Galactic Nuclei: How to Stop Star Formation
The authors investigate the fraction of massive galaxies at z ~ 2 that contains an Active Galactic Nucleus (AGN), in hopes of understanding the importance of AGN in quenching star formation.
Separating AGN activity from star formation at high redshift
Using new data from the MOSFIRE spectrograph, the authors of this paper test the ability of classic emission line diagnostics to separate star formation activity from supermassive black hole accretion at high redshift. What they find may be important for understanding how the growth galaxies and black holes affect one another over cosmic time.
Using a Lens to Look Back in Time
Using massive gravitational lenses can help us study the evolution of galaxies over unprecedented time scales.
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