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相关论文: Further constraining galaxy evolution models throu…

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We present the results of a study of stellar population properties at large galactocentric radii of 14 low-mass early-type galaxies in the Fornax and Virgo clusters. We derive radial profiles of Age, total metallicity [Z/H], and [alpha/Fe]…

宇宙学与河外天体物理 · 物理学 2015-05-19 Max Spolaor , Chiaki Kobayashi , Duncan A. Forbes , Warrick J. Couch , George K. T. Hau

We calculate the spatial two-point auto and cross-correlation functions for the 765 galaxies with Rc<21.5 and 0.1<z<0.51 in the ESO-Sculptor survey, and explore the segregation effects among the populations of giant (early-type, late…

天体物理学 · 物理学 2009-11-13 Valerie De Lapparent , Eric Slezak

We study the photometric and spectral properties of 39320 early-type galaxies within the SDSS, as a function of both local environment and redshift. The distance to the nearest cluster of galaxies and the distance to the 10th nearest…

天体物理学 · 物理学 2008-11-26 M. Bernardi , R. C. Nichol , R. K. Sheth , C. J. Miller , J. Brinkmann

On dwarf galaxy scales, the different shapes of the galaxy stellar mass function and the dark halo mass function require a star-formation efficiency (SFE) in these systems that is currently more than 1 dex lower than that of Milky Way-size…

星系天体物理 · 物理学 2015-06-19 Piero Madau , Daniel R. Weisz , Charlie Conroy

We have constructed a morphologically divided redshift distribution of faint field galaxies using a statistically unbiased sample of 196 galaxies brighter than I = 21.5 for which detailed morphological information (from the Hubble Space…

天体物理学 · 物理学 2009-10-31 M. Im , R. E. Griffiths , A. Naim , K. U. Ratnatunga , N. Roche , R. F. Green , V. L. Sarajedini

We use a sample of about 48,000 SDSS early-type galaxies to show that older galaxies have smaller half-light radii re and larger velocity dispersions sigma than younger ones of the same stellar mass Mstar. We use the age-corrected…

宇宙学与河外天体物理 · 物理学 2015-05-13 Francesco Shankar , Mariangela Bernardi

We study the locus of dwarf and giant early and late-type galaxies on the Tully-Fisher relation (TFR), the stellar mass Tully-Fisher relation (sTFR) and the so-called baryonic or HI gas+stellar mass Tully-Fisher relation (gsTFR). We show…

天体物理学 · 物理学 2011-02-11 Sven De Rijcke , W. W. Zeilinger , G. K. T. Hau , H. Dejonghe , P. Prugniel

We use measurements of the HI content, stellar mass and star formation rates in ~190 massive galaxies with stellar masses greater than 10^10 Msun, obtained from the Galex Arecibo SDSS Survey (GASS) described in Paper I (Catinella et al.…

We investigate the relation between star formation rate (SFR) and stellar mass ($M_*$) in sub-galactic ($\sim 1$kpc) scale of 93 local ($0.01<z<0.02$) massive ($M_*>10^{10.5}M_{\odot}$) spiral galaxies. To derive spatially-resolved SFR and…

星系天体物理 · 物理学 2017-11-08 Abdurro'uf , Masayuki Akiyama

Despite recent success in forming realistic present-day galaxies, simulations still form the bulk of their stars earlier than observations indicate. We investigate the process of stellar mass assembly in low-mass field galaxies, a dwarf and…

宇宙学与河外天体物理 · 物理学 2015-01-13 Sebastian Trujillo-Gomez , Anatoly Klypin , Pedro Colin , Daniel Ceverino , Kenza Arraki , Joel Primack

Studies of stellar populations in early-type galaxies (ETGs) show that the more massive galaxies form earlier and have a shorter star formation history (SFH). In this study, we investigate the initial conditions of ETG formation. The study…

星系天体物理 · 物理学 2022-09-02 Robin Eappen , Pavel Kroupa , Nils Wittenburg , Moritz Haslbauer , Benoit Famaey

The mean alpha-to-iron abundance ratio ([$\alpha$/Fe]) of galaxies is sensitive to the chemical evolution processes at early time, and it is an indicator of star formation timescale ($\tau_{{\rm SF}}$). Although the physical reason remains…

星系天体物理 · 物理学 2016-10-05 Yiqing Liu , Luis C. Ho , Eric Peng

Early-type galaxies (ETGs) are known to be enhanced in alpha elements, in accordance with their old ages and short formation timescales. In this contribution we aim to resolve the enrichment histories of ETGs. This means we study the…

星系天体物理 · 物理学 2015-10-07 C. J. Walcher , P. R. T. Coelho , A. Gallazzi , G. Bruzual , S. Charlot , C. Chiappini

We examine the accretion of cores of giant planets from planetesimals, gas accretion onto the cores, and their orbital migration. We adopt a working model for nascent protostellar disks with a wide variety of surface density distributions…

天体物理学 · 物理学 2009-11-10 S. Ida , D. N. C. Lin

Dedicated photometric and spectroscopic surveys have provided unambiguous evidence for a strong stellar mass-size evolution of galaxies within the last 10 Gyr. The likely progenitors of today's most massive galaxies are remarkably small,…

We have developed a simple, static model designed to place a very solid lower limit on the star formation rate (SFR) expected in a dwarf disk galaxy, which leads to the prediction of a previously undocumented relation between HI mass, M_HI,…

天体物理学 · 物理学 2007-05-23 Edward N Taylor

The chemical evolution of galaxies is investigated within the framework of the star formation rate (SFR) dependent integrated galactic initial mass function (IGIMF). We study how the global chemical evolution of a galaxy and in particular…

宇宙学与河外天体物理 · 物理学 2015-05-13 Simone Recchi , Francesco Calura , Pavel Kroupa

Observations show that star-forming galaxies reside on a tight three-dimensional plane between mass, gas-phase metallicity and star formation rate (SFR), which can be explained by the interplay between metal-poor gas inflows, SFR and…

星系天体物理 · 物理学 2018-06-06 Jorryt Matthee , Joop Schaye

The number density of UV luminous galaxies discovered by the James Webb Space Telescope at ultra high redshift ($z \gtrsim 10$) is higher, and declines much more slowly with increasing redshift, than expected from extrapolations of lower…

We studied the radio properties of very young massive regions of star formation in HII galaxies, with the aim of detecting episodes of recent star formation in an early phase of evolution where the first supernovae start to appear. The…

宇宙学与河外天体物理 · 物理学 2009-03-04 Daniel Rosa-Gonzalez , Henrique Schmitt , Elena Terlevich , Roberto Terlevich