Structural Evolution in Massive Galaxies at z ∼ 2
نویسندگان
چکیده
منابع مشابه
Star Formation and Merging in Massive Galaxies at z < 2
Observing massive galaxies at various redshifts is one of the most straightforward and direct approaches towards understanding galaxy formation. There is now largely a consensus that the massive galaxy (M∗ > 10 11 M⊙ ) population is fully formed by z ∼ 1, based on mass and luminosity functions. However, we argue that the latest data can only rule out number and mass density evolution of a facto...
متن کاملDisk galaxies at z=2 in OWLS
We use the OWLS (OverWhelmingly Large Simulations) set of cosmological Nbody/gasdynamical simulations to study the properties of simulated galaxies at z = 2. We focus on the effect of supernova feedback from evolving stars on the baryonic mass and angular momentum content of galaxies that assemble at the center of 10-10 hM⊙ halos. Our main finding is that the mass and angular momentum of such g...
متن کاملMorphologies of Two Massive Old Galaxies at Z ∼ 2.5
We present the results of NICMOS imaging of two massive galaxies photometrically selected to have old stellar populations at z ∼ 2.5. Both galaxies are dominated by apparent disks of old stars, although one of them also has a small bulge comprising about 1/3 of the light at rest-frame 4800 Å. The presence of massive disks of old stars at high redshift means that at least some massive galaxies i...
متن کاملA Massive Cluster of Galaxies at Z = 0.996
We report the identiication of a cluster of galaxies around the high-redshift radio galaxy 3CR184 at z = 0.996. The identiication is supported by an excess of galaxies observed in projection in I band images (both in ground-based and HST data), a peak in the redshift distribution comprising 11 galaxies (out of 56 with measured redshifts) in a 2000 km s ?1 velocity interval, and the observation ...
متن کاملExtremely Compact Massive Galaxies at 1.7 < Z < 3
We measure and analyse the sizes of 82 massive (M ≥ 10M⊙) galaxies at 1.7 ≤ z ≤ 3 utilizing deep HST NICMOS data taken in the GOODS North and South fields. Our sample provides the first statistical study of massive galaxy sizes at z > 2. We split our sample into disk–like (Sérsic index n ≤ 2) and spheroid– like (Sérsic index n > 2) galaxies, and find that at a given stellar mass, disk–like gala...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2020
ISSN: 1538-4357
DOI: 10.3847/1538-4357/abaf4a