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Recent observations indicate that the progenitors of globular clusters (GCs) at high redshifts had high average stellar surface densities above $10^5\, \mathrm{M}_\odot\, \mathrm{pc}^{-2}$. The internal structure and kinematics of the…

Astrophysics of Galaxies · Physics 2025-10-10 Natalia Lahén , Thorsten Naab , Antti Rantala , Christian Partmann

The relation between dark matter halos and the loci of star formation at high redshift is a pressing question in contemporary cosmology. Matching the abundance of halos to the abundance of infrared (IR) galaxies, we explicit the link…

Cosmology and Nongalactic Astrophysics · Physics 2012-04-03 Matthieu Béthermin , Olivier Doré , Guilaine Lagache

We present a new determination of the star-forming main sequence (MS), obtained through stacking 100k K-band-selected galaxies in the far-infrared (FIR) Herschel and James Clerk Maxwell Telescope (JCMT) imaging. By fitting the dust emission…

Astrophysics of Galaxies · Physics 2024-11-15 M. P. Koprowski , J. V. Wijesekera , J. S. Dunlop , D. J. McLeod , M. J. Michałowski , K. Lisiecki , R. J. McLure

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…

Astrophysics of Galaxies · Physics 2018-06-06 Jorryt Matthee , Joop Schaye

Galaxy clusters provide powerful laboratories for the study of galaxy evolution, particularly the origin of correlations of morphology and star formation rate (SFR) with density. We construct visible to MIR spectral energy distributions…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 David W. Atlee , Paul Martini

Using archived data from the Chandra X-ray telescope, we have extracted the diffuse X-ray emission from 49 equal-mass interacting/merging galaxy pairs in a merger sequence, from widely separated pairs to merger remnants. After removal of…

The question of what regulates star formation is a long standing issue. To investigate this issue, we run simulations of a kiloparsec cube section of a galaxy with three kinds of stellar feedback: the formation of HII regions, the explosion…

Astrophysics of Galaxies · Physics 2020-06-22 Noé Brucy , Patrick Hennebelle , Frédéric Bournaud , Cédric Colling

We investigate the star formation histories (SFHs) of high redshift (3 <~ z <~ 5) star-forming galaxies selected based on their rest-frame ultraviolet (UV) colors in the CANDELS/GOODS-S field. By comparing the results from the…

Astrophysics of Galaxies · Physics 2014-03-26 Seong-Kook Lee , Henry C. Ferguson , Rachel S. Somerville , Mauro Giavalisco , Tommy Wiklind , Tomas Dahlen

The Survey of HI in Extremely Low-mass Dwarfs (SHIELD) is an on-going multi-wavelength program to characterize the gas, star formation, and evolution in gas-rich, very low-mass galaxies that populate the faint end of the galaxy luminosity…

We use new and updated gas and dust-corrected SFR surface densities to revisit the integrated star formation law for local "quiescent" spiral, dwarf, and low-surface-brightness galaxies. Using UV-based SFRs with individual IR-based dust…

Astrophysics of Galaxies · Physics 2019-02-12 Mithi A. C. de los Reyes , Robert C. Kennicutt

The GMRT observations of the HI 21~cm-line emission from 13~nearby dwarf star-forming galaxies are presented. The ranges of star formation rates and stellar masses of the sample galaxies are 0.03 -- 1.7~$M_\odot~{\rm yr}^{-1}$ and 0.04 --…

Astrophysics of Galaxies · Physics 2020-09-09 Sumit Jaiswal , Amitesh Omar

Strong bursts of star formation in galaxies may be triggered either by internal or external mechanisms. We study the distribution and kinematics of the HI gas in the outer regions of 18 nearby starburst dwarf galaxies, that have accurate…

Astrophysics of Galaxies · Physics 2015-06-22 Federico Lelli , Marc Verheijen , Filippo Fraternali

We utilize detailed time-varying models of the coupled evolution of stars and the HI, H_2, and CO-bright H_2 gas phases in galaxy-sized numerical simulations to explore the evolution of gas-rich and/or metal-poor systems, expected to be…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Padelis P. Papadopoulos , Federico I. Pelupessy

We investigate how star-forming galaxies typically assemble their masses at high redshift. Using the deep multi-wavelength coverage of the GOODS dataset, we measure stellar mass of a large sample of star-forming galaxies at z~4 and 5, and…

We report on a sample of 51 nearby, star-forming galaxies observed with the Cosmic Origin Spectrograph on the Hubble Space Telescope. We calculate Si II kinematics and densities arising from warm gas entrained in galactic outflows. We use…

Astrophysics of Galaxies · Physics 2015-10-07 John Chisholm , Christina A. Tremonti , Claus Leitherer , Yanmei Chen , Aida Wofford , Britt Lundgren

We present adaptive optics assisted integral field spectroscopy of nine Halpha-selected galaxies at z=0.84--2.23 selected from the HiZELS narrow-band survey. Our observations map the star-formation and kinematics of these representative…

Cosmology and Nongalactic Astrophysics · Physics 2012-11-12 Mark Swinbank , Ian Smail , David Sobral , Tom Theuns , Philip Best , Jim Geach

We explore the evolution of the Stellar Mass-Star Formation Rate-Metallicity Relation using a set of 256 COSMOS and GOODS galaxies in the redshift range 1.90 < z < 2.35. We present the galaxies' rest-frame optical emission-line fluxes…

We examine the cosmic star formation rate (SFR) and its dependence on galaxy stellar mass over the redshift range 0.8 < z < 2 using data from the Gemini Deep Deep Survey (GDDS). The SFR in the most massive galaxies (M > 10^{10.8} M_sun) was…

(Abridged) By means of high-resolution cosmological simulations in the context of the LCDM scenario, the specific star formation rate (SSFR=SFR/Ms, Ms is the stellar mass)--Ms and stellar mass fraction (Fs=Ms/Mh, Mh is the halo mass)--Ms…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 V. Avila-Reese , P. Colín , A. González-Samaniego , O. Valenzuela , C. Firmani , H. Velázquez , D. Ceverino

We present multi-wavelength imaging and near-IR spectroscopy for ten gravitationally lensed galaxies at 0.9<z<2.5 selected from a new, large sample of strong lens systems in the Sloan Digital Sky Survey (SDSS) DR7. We derive stellar masses…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Eva Wuyts , Jane R. Rigby , Keren Sharon , Michael D. Gladders