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We study the effects of galaxy environment on the evolution of the stellar-mass function (SMF) over 0.2 < z < 2.0 using the FourStar Galaxy Evolution (ZFOURGE) survey and NEWFIRM Medium-Band Survey (NMBS) down to the stellar-mass…

A common assumption is that galaxies fall in two distinct regions on a plot of specific star-formation rate (SSFR) versus galaxy stellar mass: a star-forming Galaxy Main Sequence (GMS) and a separate region of `passive' or `red and dead…

星系天体物理 · 物理学 2017-01-25 Stephen Eales , Pieter de Vis , Matthew Smith , Kiran Appah , Laure Ciesla , Chris Duffield , Simon Schofield

We use a semi-analytic model for disk galaxies to explore the origin of the time evolution and small scatter of the galaxy SFR sequence -- the tight correlation between star-formation rate (SFR) and stellar mass (M_star). The steep decline…

宇宙学与河外天体物理 · 物理学 2015-05-14 Aaron A. Dutton , Frank C. van den Bosch , Avishai Dekel

Using data drawn from the DEEP2 and DEEP3 Galaxy Redshift Surveys, we investigate the relationship between the environment and the structure of galaxies residing on the red sequence at intermediate redshift. Within the massive (10 <…

We explore using our continuity approach the underlying connections between the evolution of the faint-end slope of the stellar mass function of star-forming galaxies, the logarithmic slope of the sSFR-mass relation and the merging of…

星系天体物理 · 物理学 2014-07-21 Yingjie Peng , Simon J. Lilly , Alvio Renzini , C. Marcella Carollo

We estimate the galaxy stellar mass function and stellar mass density for star-forming and quiescent galaxies with 0.2<z<4. We construct a deep K<24 sample of 220000 galaxies selected using the UltraVISTA DR1 data release. Our analysis is…

By using the deepest available mid and far infrared surveys in the CANDELS, GOODS and COSMOS fields we study the evolution of the Main Sequence (MS) of star forming galaxies (SFGs) from z~0 to` ~2.5 at stellar masses larger than 10^{10}…

We have studied the dynamical evolution of rotating star clusters with mass spectrum using a Fokker-Planck code. As a simplest multi-mass model, we first investigated the two-component clusters. Rotation is found to accelerate the dynamical…

天体物理学 · 物理学 2009-11-10 Eunhyeuk Kim , Hyung Mok Lee , Rainer Spurzem

We study the evolution of stellar mass in galaxies as a function of host halo mass, using the "MPA" and "Durham" semi-analytic models, implemented on the Millennium Run simulation. The results from both models are similar. We find that…

宇宙学与河外天体物理 · 物理学 2015-05-27 Idit Zehavi , Santiago Patiri , Zheng Zheng

[Abridged] Many current and future astronomical surveys will rely on samples of strong gravitational lens systems to draw conclusions about galaxy mass distributions. We use a new strong lensing pipeline (presented in Paper I of this…

天体物理学 · 物理学 2015-05-13 Rachel Mandelbaum , Glenn van de Ven , Charles R. Keeton

The mass-size relation is a fundamental galaxy scaling law closely tied to galaxy formation and evolution. Using added-value products of the Calar Alto Void Integral-field Treasury surveY (CAVITY) and SDSS DR16 images, we examine the effect…

We present an analysis of stellar populations in passive galaxies in seven massive X-ray clusters at z=0.19-0.89. Based on absorption line strengths measured from our high signal-to-noise spectra, the data support primarily passive…

星系天体物理 · 物理学 2017-12-06 Inger Jorgensen , Kristin Chiboucas , Emily Berkson , Omega Smith , Marianne Takamiya , Alexa Villaume

Galaxies cover a wide range of masses and star formation histories. In this review, I summarize some of the evolutionary key features of common galaxy types. At the high-mass end, very rapid, efficient early star formation is observed,…

宇宙学与河外天体物理 · 物理学 2015-05-19 Eva K. Grebel

We perform a comprehensive study of the stellar population properties of quiescent galaxies as a function of size and stellar mass to constrain the physical mechanism governing the stellar mass assembly and the likely evolutive scenarios…

We examine the growth of the stellar content of galaxies from z=3-0 in cosmological hydrodynamic simulations incorporating parameterised galactic outflows. Without outflows, galaxies overproduce stellar masses (M*) and star formation rates…

宇宙学与河外天体物理 · 物理学 2015-05-27 Romeel Davé , Benjamin D. Oppenheimer , Kristian Finlator

We study the correlation between galaxy structure and the quenching of star formation using a sample of SDSS central galaxies with stellar masses 9.75< log M_*/M_sun<11.25 and redshifts z<0.075. GALEX UV data are used to cleanly divide the…

宇宙学与河外天体物理 · 物理学 2015-06-17 Jerome J. Fang , S. M. Faber , David C. Koo , Avishai Dekel

We measure the evolution in the intrinsic shape distribution of early-type galaxies from z~1 to z~0 by analyzing their projected axis-ratio distributions. We extract a low-redshift sample (0.04 < z < 0.08) of early-type galaxies with very…

宇宙学与河外天体物理 · 物理学 2015-05-30 Bradford Holden , Arjen van der Wel , Hans-Walter Rix , Marijn Franx

Exploiting the capabilities of four different surveys --- the Padova-Millennium Galaxy and Group Catalogue (PM2GC), the WIde-field Nearby Galaxy-cluster Survey (WINGS), the IMACS Cluster Building Survey (ICBS) and the ESO Distant Cluster…

A large deep and nearly complete B<24.5 redshift sample is used to measure the change in distribution function of the stellar mass production rate in individual galaxies with redshift. The evolution of the star formation rate distribution…

天体物理学 · 物理学 2009-10-30 Lennox L. Cowie , Esther M. Hu , Antoinette Songaila , Eiichi Egami

We measure the diversity of galaxy groups and clusters with mass M>1E13/h Msun, in terms of the star formation history of their galaxy populations, for the purpose of constraining the mass scale at which environmentally-important processes…

宇宙学与河外天体物理 · 物理学 2015-05-14 Michael L. Balogh , Sean L. McGee