scholarly journals A Redshift-independent Efficiency Model: Star Formation and Stellar Masses in Dark Matter Halos at z ≳ 4

2018 ◽  
Vol 868 (2) ◽  
pp. 92 ◽  
Author(s):  
Sandro Tacchella ◽  
Sownak Bose ◽  
Charlie Conroy ◽  
Daniel J. Eisenstein ◽  
Benjamin D. Johnson
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Dark Matter Halos ◽  
Model Star ◽  
Stellar Masses

scholarly journals Ultra Massive Passive Galaxies at z~1.7

2015 ◽  
Vol 11 (S319) ◽  
pp. 111-111
Author(s):  
Liz Arcila-Osejo ◽  
Marcin Sawicki ◽  
Anneya Golob ◽  
Stephane Arnouts ◽  
Thibaud Moutard
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Effective Area ◽  
Dark Matter Halos ◽  
Quenching Mechanism ◽  
Massive Galaxies ◽  
Star Formation Activity ◽  
Stellar Masses ◽  
The Universe ◽  
Very High

AbstractAt redshift z~1.7 the Universe was at the peak of its star-formation activity. It is thus a puzzle why some galaxies, many of them very massive (M* ⩾ 1011 M⊙), had already chosen to stop forming stars. These ultra-massive galaxies, guaranteed to be the central galaxies of their host dark matter halos, must have attained very high rates of star formation to assemble their stellar masses in such a short amount of time. Using the largest (to date) K-selected gzKs survey of passive galaxies (in an effective area of ~ 27.5 deg2) we study the demographics of these dead monsters, hoping to help understand the quenching mechanism that shut them down.

scholarly journals The redshift evolution of the distribution of star formation among dark matter halos as seen in the infrared

2013 ◽  
Vol 557 ◽  
pp. A66 ◽  
Author(s):  
Matthieu Béthermin ◽  
Lingyu Wang ◽  
Olivier Doré ◽  
Guilaine Lagache ◽  
Mark Sargent ◽  
...  
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Dark Matter Halos

scholarly journals The Galaxy UV Luminosity Function Before the Epoch of Reionization

2015 ◽  
Vol 11 (S319) ◽  
pp. 33-33 ◽  
Author(s):  
Charlotte A. Mason ◽  
Michele Trenti ◽  
Tommaso Treu
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Degrees Of Freedom ◽  
Luminosity Function ◽  
High Redshift ◽  
Dark Matter Halos ◽  
Redshift Surveys ◽  
The Galaxy ◽  
Mass Dependent

AbstractWe present a model for the evolution of the galaxy ultraviolet (UV) luminosity function (LF) where star formation is linked to the assembly of dark matter halos under the assumption of a mass dependent, but redshift independent, efficiency. With a calibration at a single redshift, and no further degrees of freedom, our model captures the evolution of the UV LF over all available observations (0≲ z ≲ 10). We make predictions for reionization and future high-redshift surveys with JWST and WFIRST.

scholarly journals Building Galactic Disks in Triaxial Dark Matter Halos

2006 ◽  
Vol 2 (S235) ◽  
pp. 24-28
Author(s):  
Isaac Shlosman
Keyword(s):  
Dark Matter ◽  
Angular Momentum ◽  
Star Formation ◽  
Numerical Simulations ◽  
Recent Work ◽  
Stellar Evolution ◽  
Dark Matter Halos ◽  
Local Universe ◽  
Broad Agreement ◽  
Formation And Evolution

AbstractWe review our recent work on the formation and evolution of disks within triaxial dark matter (DM) halos by means of numerical simulations, including star formation and feedback from stellar evolution. The growing disks are strongly influenced by shapes of DM halos and modify them in turn. Disk parameters are in a broad agreement with those in the local universe. Gas-rich stellar bars grow in tandem with the disk and facilitate the angular momentum redistribution in the system and radial gas inflow. Nested bars appear to form as a by-product. Interactions between various non-axisymmetric components—bars, disks and halos lead to decay of bars or washing out of ellipticity in the inner halo.

scholarly journals The Slow Growth of Massive Galaxies in Rapidly Growing Dark Matter Halos

2009 ◽  
Vol 5 (S262) ◽  
pp. 244-247
Author(s):  
Michael J. I. Brown ◽  
Keyword(s):  
Dark Matter ◽  
Rapid Growth ◽  
Observational Studies ◽  
Cold Dark Matter ◽  
Slow Growth ◽  
Stellar Mass ◽  
Dark Matter Halos ◽  
Massive Galaxies ◽  
Stellar Masses ◽  
Red Galaxies

AbstractIn cold dark matter cosmologies, the most massive dark matter halos are predicted to undergo rapid growth at z < 1. While there is the expectation that massive galaxies will also rapidly grow via merging, recent observational studies conclude that the stellar masses of the most massive galaxies grow by just ~ 30% at z < 1. We have used the observed space density and clustering of z < 1 red galaxies in Boötes to determine how these galaxies populate dark matter halos. In the most massive dark matter halos, central galaxy stellar mass is proportional to halo mass to the power of a ~1/3 and much of the stellar mass resides within satellite galaxies. As a consequence, the most massive galaxies grow slowly even though they reside within rapidly growing dark matter halos.

scholarly journals CONSTRAINING THE STAR FORMATION HISTORIES IN DARK MATTER HALOS. I. CENTRAL GALAXIES

2013 ◽  
Vol 770 (2) ◽  
pp. 115 ◽  
Author(s):  
Xiaohu Yang ◽  
H. J. Mo ◽  
Frank C. van den Bosch ◽  
Ana Bonaca ◽  
Shijie Li ◽  
...  
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Dark Matter Halos ◽  
Star Formation Histories

scholarly journals GRB host galaxies: theoretical investigation

2011 ◽  
Vol 7 (S279) ◽  
pp. 353-354
Author(s):  
Jirong Mao
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Galaxy Evolution ◽  
Gamma Ray ◽  
Dark Matter Halo ◽  
Host Galaxy ◽  
Host Galaxies ◽  
X Ray ◽  
Star Forming ◽  
Stellar Masses

AbstractLong gamma-ray bursts (GRBs) can be linked to the massive stars and their host galaxies are assumed to be the star-forming galaxies within small dark matter halos. We apply a galaxy evolution model, in which the star formation process inside the virialized dark matter halo at a given redshift is achieved. The star formation rates (SFRs) in the GRB host galaxies at different redshifts can be derived from our model. The related stellar masses, luminosities, and metalicities of these GRB host galaxies are estimated. We also calculate the X-ray and optical absorption of GRB afterglow emission. At higher redshift, the SFR of host galaxy is stronger, and the absorption in the X-ray and optical bands of GRB afterglow is stronger, when the dust and metal components are locally released, surrounding the GRB environment. These model predictions are compared with some observational data as well.

Modeling Star Formation in Dwarf Spheroidal Galaxies: A Case for Extended Dark Matter Halos

2005 ◽  
Vol 624 (2) ◽  
pp. 726-741 ◽  
Author(s):  
Sergey Mashchenko ◽  
H. M. P. Couchman ◽  
Alison Sills
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Dark Matter Halos ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies

scholarly journals Dark Matter Halos and the Main Sequence of Starforming Galaxies

2015 ◽  
Vol 11 (S319) ◽  
pp. 1-1
Author(s):  
Hervé Aussel ◽  
Sébastien Peirani ◽  
Laurent Vigroux
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Numerical Simulations ◽  
Power Law ◽  
Main Sequence ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Stellar Mass ◽  
Dark Matter Halos ◽  
Star Forming

AbstractWe investigate why hydrodynamical numerical simulations have difficulties (Weinmann et al. 2011) in reproducing the Main Sequence (MS) of star-forming galaxies, i.e. the fact that galaxies forming stars lie on a tight power law sequence in the stellar mass (M*), star formation rate (SFR) plane (Schreiber et al. 2015). Instead of trying to improve the agreement of simulations with the observations by modifying the subgrid recipes of baryons, we take here a step back to check whether the accretion onto dark matter halos is consistent with the existence of the main sequence of star forming galaxies.

scholarly journals THE AVERAGE STAR FORMATION HISTORIES OF GALAXIES IN DARK MATTER HALOS FROMz= 0-8

2013 ◽  
Vol 770 (1) ◽  
pp. 57 ◽  
Author(s):  
Peter S. Behroozi ◽  
Risa H. Wechsler ◽  
Charlie Conroy
Keyword(s):  
Dark Matter ◽  
Star Formation ◽  
Dark Matter Halos ◽  
Star Formation Histories
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