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We study the FIR and UV-visible properties of nearby star forming galaxies. This comparison is performed using the local luminosity functions at UV and FIR wavelengths and on individual starburst galaxies for which photometric data from UV…

Astrophysics · Physics 2007-05-23 Veronique Buat , Denis Burgarella

We study the star formation rate and dust extinction properties of a sample of nearby star forming galaxies as derived from Halpha and UV (2000 A) observations and we compare them to those of a sample of starburst galaxies. The dust…

Astrophysics · Physics 2016-08-30 V. Buat , A. Boselli , G. Gavazzi , C. Bonfanti

An important property of star-forming galaxies at z~1-2 is the high local star-formation intensities they maintain over tens of kiloparsecs at levels that are only observed in the nearby Universe in the most powerful nuclear starbursts. To…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 L. Le Tiran , M. D. Lehnert , W. van Driel , N. P. H. Nesvadba , P. Di Matteo

We identify 182 flares on 158 stars within 100 pc of the Sun in both the near-ultraviolet (NUV: 1750-2750 \r{A}) and far-ultraviolet (FUV: 1350-1750 \r{A}) using high-cadence light curves from the Galaxy Evolution Explorer (GALEX).…

The origin of fast radio bursts remains a puzzle. Suggestions have been made that they are produced within the Earth atmosphere, in stellar coronae, in other galaxies or at cosmological distances. If they are extraterrestrial, the implied…

High Energy Astrophysical Phenomena · Physics 2016-02-17 Yuri Lyubarsky , Sofiya Ostrovska

Bright star-forming galaxies radiate well below their Eddington Limit. The value of the flux-mean opacity that mediates the radiation force onto matter is orders of magnitude smaller than the UV or optical dust opacity. On empirical…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Aristotle Socrates , Lorenzo Sironi

Observations for seven infrared luminous starburst galaxies are reported in the mid-infrared from 8 - 18 microns using the Keck Telescopes with spatial resolution approaching the diffraction limit. All of the galaxies observed show evidence…

The properties of starbursts in ultraluminous infrared galaxies are discussed, with particular emphasis on the fueling, the amount of extinction and the intrinsic properties of the nuclear starbursts. It is shown by the example of NGC6240…

Astrophysics · Physics 2007-05-23 Paul P. van der Werf

We address the effects of cosmological surface brightness dimming on observations of faint galaxies by examining the distribution of "unobscured" star formation rate intensities versus redshift. We use the star formation rate intensity…

We investigate if dust emission in the far-IR continuum provides a robust estimate of star formation rate (SFR) for a nearby, normal late-type galaxy. We focus on the ratio of the 40--1000 micron luminosity (L_dust) to the far-UV (0.165…

Astrophysics · Physics 2009-11-10 D. Pierini , C. S. Moeller

At luminosities above ~10^{11} L_sun, infrared galaxies become the dominant population of extragalactic objects in the local Universe (z < 0.5), being more numerous than optically selected starburst and Seyfert galaxies, and QSOs at…

Astrophysics · Physics 2007-05-23 D. B. Sanders , J. A. Surace , C. M. Ishida

Recent interferometric surveys of nearby main-sequence stars show a faint but significant near-infrared excess in roughly two dozen systems, i.$\,$e. around $10\,\%$ to $30\,\%$ of stars surveyed. This excess is attributed to dust located…

Solar and Stellar Astrophysics · Physics 2017-02-01 Florian Kirchschlager , Sebastian Wolf , Alexander V. Krivov , Harald Mutschke , Robert Brunngräber

The aim of this study is to quantify the infrared luminosity of clusters as a function of redshift and compare this with the X-ray luminosity. This can potentially constrain the origin of the infrared emission to be intracluster dust and/or…

Astrophysics · Physics 2009-11-13 Martin Giard , Ludovic Montier , Etienne Pointecouteau , Ellen Simmat

We analyze the dust attenuation properties of a volume-limited, optically-selected sample of normal star forming galaxies in nearby clusters as observed by GALEX. The internal attenuation is estimated using three independent indicators,…

A large fraction of stars forming in our galaxy are born within clusters embedded in giant molecular clouds. In these environments, the background UV radiation fields impinging upon circumstellar disks can often dominate over the radiation…

Astrophysics of Galaxies · Physics 2015-05-20 Lisa Holden , Edward Landis , Jeremy Spitzig , Fred C. Adams

The fate of ionizing radiation is vital for understanding cosmic ionization, energy budgets in the interstellar and intergalactic medium, and star formation rate indicators. The low observed escape fractions of ionizing radiation have not…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 D. J. Hanish , M. S. Oey , J. R. Rigby , D. F. de Mello , J. C. Lee

Estimates of the total metal production rate (\dot{\rho}_Z) and star formation rate at z > 2 are based on Lyman break systems observed in the rest-frame ultraviolet (UV). These observations are very sensitive to dust obscuration. Here I…

Astrophysics · Physics 2007-05-23 Gerhardt R. Meurer

We analysed ALMA FIR (1.3 mm) dust continuum and CO emission of 12 starburst galaxies at $z\sim 2.1-3.6$, selected for their extreme brightness in the rest-UV with $M_{\rm UV} = -23.4$ to $-24.7$. We also analysed VLT HAWK-I $H$- and…

Far-infrared and submillimeter wavelength surveys have now established the important role of dusty, star-forming galaxies (DSFGs) in the assembly of stellar mass and the evolution of massive galaxies in the Universe. The brightest of these…

Cosmology and Nongalactic Astrophysics · Physics 2014-08-05 Caitlin M. Casey , Desika Narayanan , Asantha Cooray