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相关论文: The Volumetric Extended-Schmidt Law: A Unity Slope

200 篇论文

We have analyzed the spatial distribution of galaxies from the release of the Sloan Digital Sky Survey of galactic redshifts (SDSS DR7), applying the complete correlation function (conditional density), two-point conditional density…

宇宙学与河外天体物理 · 物理学 2015-05-27 A. O. Verevkin , Yu. L. Bukhmastova , Yu. V. Baryshev

We explore the evolution of the specific star formation rate (SSFR) for 3.6um-selected galaxies of different M_* in the COSMOS field. The average SFR for sub-sets of these galaxies is estimated with stacked 1.4GHz radio continuum emission.…

We use simulations of isolated galaxies with a few parsec resolution to explore the connection between the small-scale star formation rate - gas density relation and the induced large-scale correlation between the star formation rate…

星系天体物理 · 物理学 2015-06-18 Nickolay Y. Gnedin , Elizabeth J. Tasker , Yusuke Fujimoto

The \ion{H}{I}-rich ultra-diffuse galaxies (HUDGs) offer a unique case for studies of star formation laws (SFLs) as they host low star formation efficiency (SFE) and low-metallicity environments where gas is predominantly atomic. We collect…

星系天体物理 · 物理学 2023-11-14 Sai Zhai , Yong Shi , Zhi-Yu Zhang , Jun-Zhi Wang , Yu Gao , Qiusheng Gu , Tao Wang , Kaiyi Du , Xiaoling Yu , Xin Li

We have combined Halpha and recent high resolution CO(J=1-0) data to consider the quantitative relation between gas mass and star formation rate, or the so-called Schmidt law in nearby spiral galaxies at regions of high molecular density.…

天体物理学 · 物理学 2015-06-24 Shinya Komugi , Yoshiaki Sofue , Hiroyuki Nakanishi , Sachiko Onodera , Fumi Egusa

ALMA Cycle 2 observations of the long wavelength dust emission in 145 star-forming galaxies are used to probe the evolution of star-forming ISM. We also develop the physical basis and empirical calibration (with 72 low-z and z ~ 2 galaxies)…

Exploiting the sample of 30 local star-forming, undisturbed late-type galaxies in different environments drawn from the GAs Stripping Phenomena in galaxies with MUSE (GASP), we investigate the spatially resolved Star Formation Rate-Mass…

We provide a coherent, uniform measurement of the evolution of the logarithmic star formation rate (SFR) - stellar mass ($M_*$) relation, called the main sequence of star-forming galaxies (MS), for galaxies out to $z\sim5$. We measure the…

Results from the UV satellite GALEX revealed large extensions of disks in some nearby spiral galaxies, extending out to 3 to 4 times the isophotal radius, r25. M63 is a remarkable example of a spiral galaxy with one of the most extended UV…

星系天体物理 · 物理学 2014-07-02 M. Dessauges-Zavadsky , C. Verdugo , F. Combes , D. Pfenniger

[ABRIDGED] Using the Gaussian+Schechter composite luminosity functions measured from the ESO-Sculptor Survey (de Lapparent et al. 2003), we obtain evidence for evolution in the late spectral class containing late-type Spiral (Sc+Sd) and…

天体物理学 · 物理学 2009-11-10 Valerie de Lapparent , Stephane Arnouts , Gaspar Galaz , Sandro Bardelli

We derive a metallicity dependent relation between the surface density of the star formation rate (Sigma_{SFR}) and the gas surface density (Sigma_{g}) in a feedback regulated model of star formation in galactic disks. In this model, star…

宇宙学与河外天体物理 · 物理学 2015-05-28 Sami Dib

We study the total density distribution in the central regions ($<\, 1$ effective radius, $R_{\rm e}$) of early-type galaxies (ETGs), using data from the SPIDER survey. We model each galaxy with two components (dark matter halo + stars),…

星系天体物理 · 物理学 2016-06-29 C. Tortora , F. La Barbera , N. R. Napolitano , A. J. Romanowsky , I. Ferreras , R. R. de Carvalho

We review recent observations of molecular gas in nearby galaxies and their implications for the star formation law on large (>1 kpc) scales. High-resolution data provided by millimetre interferometers are now adding to the basic…

天体物理学 · 物理学 2007-05-23 Tony Wong , Michele D. Thornley

We study the Kennicutt-Schmidt star formation law and efficiency in the gaseous disk of the isolated galaxy CIG 96 (NGC 864), with special emphasis on its unusually large atomic gas (HI) disk (r_HI/r_25 = 3.5, r_25 = 1.'85). We present deep…

The observational study of star-formation laws is paramount to disentangling the physical processes at work on local and global scales in galaxies. To this aim we have expanded the sample of extreme starbursts, represented by local LIRGs…

宇宙学与河外天体物理 · 物理学 2015-06-11 S. Garcia-Burillo , A. Usero , A. Alonso-Herrero

We present a new observational method to evaluate the star formation law as formulated by Schmidt: the power-law expression assumed to relate the rate of star formation in a volume of space to the local total gas volume density. Volume…

星系天体物理 · 物理学 2015-05-19 J. S. Heiner , R. J. Allen , P. C. van der Kruit

We study the relationship between the gas column density (derived from GMRT 21 cm data) and the star formation rate surface density (derived from publicly available GALEX data) for a sample of 23 extremely faint dwarf irregular galaxies…

宇宙学与河外天体物理 · 物理学 2014-09-04 Sambit Roychowdhury , Jayaram N. Chengalur , Ayesha Begum , Igor D. Karachentsev

We derive observed Halpha and R band luminosity densities of an HI-selected sample of nearby galaxies using the SINGG sample to be l_Halpha' = (9.4 +/- 1.8)e38 h_70 erg s^-1 Mpc^-3 for Halpha and l_R' = (4.4 +/- 0.7)e37 h_70 erg s^-1 A^-1…

The global Schmidt law of star formation provides a power-law relation between the surface densities of star-formation rate (SFR) and gas, and successfully explains plausible scenarios of galaxy formation and evolution. However, star…

星系天体物理 · 物理学 2020-02-05 Nimisha Kumari , Mike J Irwin , Bethan L James

We develop a model for regulation of galactic star formation rates Sigma_SFR in disk galaxies, in which ISM heating by stellar UV plays a key role. By requiring simultaneous thermal and (vertical) dynamical equilibrium in the diffuse gas,…

宇宙学与河外天体物理 · 物理学 2015-05-19 Eve C. Ostriker , Christopher F. McKee , Adam K. Leroy