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It is difficult to identify the distant galaxies selected in existing submillimetre-wave surveys, because their positions are known at best to only several arcseconds. Centimetre-wave VLA observations are required in order to determine…

Astrophysics · Physics 2008-11-26 Andrew W. Blain

Candidates for the modest galaxies that formed most of the stars in the early universe, at redshifts $z > 7$, have been found in large numbers with extremely deep restframe-UV imaging. But it has proved difficult for existing spectrographs…

We present the first results of a detailed modeling of chemical and photometric evolution of galaxies including the effects of a dusty interstellar medium. A chemical evolution code follows the SF rate, the gas fraction and the metallicity,…

We argue that the difference in infrared-to-radio luminosity ratio between local and high-redshift star-forming galaxies reflects {the alternative physical conditions} -- including magnetic field configurations -- of the dominant population…

Astrophysics of Galaxies · Physics 2024-07-16 G. De Zotti , M. Bonato , M. Giulietti , M. Massardi , M. Negrello , H. S. B. Algera , J. Delhaize

We have tested some relations for star formation rates used in extra-galactic studies for regions within the Galaxy. In nearby molecular clouds, where the IMF is not fully-sampled, the dust emission at 24 micron greatly underestimates star…

Astrophysics of Galaxies · Physics 2015-06-15 Nalin Vutisalchavakul , Neal J. Evans

X-ray observations of galaxies have grown from a curiosity into a full-fledged field of astronomy. These observations provide unique information on black holes, binary stars, and the hot phase of the ISM, which can be used to constrain the…

Astrophysics · Physics 2011-11-10 G. Fabbiano

We summarize recent advances in the determination of the cosmic history of star formation and other properties of high-z galaxies, and the relevance of this information in our understanding of the formation of structures. We emphasize the…

Astrophysics · Physics 2016-01-27 Gian Luigi Granato , Laura Silva

Several lines of evidence suggest that early-type galaxies might have been very dusty during their initial evolutionary stages, characterized by intense star formation activity. The radio selection has provided, by far, the richest samples…

Astrophysics · Physics 2015-06-24 Paola Mazzei , Gianfranco De Zotti

I will present recent theoretical results on the formation and the high redshift assembly of spheroids. These findings have been obtained by utilising different and complementary techniques: chemodynamical models offer great insight in the…

Astrophysics · Physics 2008-01-14 Antonio Pipino , Francesca Matteucci , Thomas H. Puzia

The optical regime is historically the best-studied wavelenght range. Gas ionized by massive stars produces optical emission lines that have been used to derive indicators of star-formation rate, metallicity, dust reddening, and the…

Astrophysics · Physics 2015-11-11 Daniela Calzetti

In recent years, significant growth in the amount of data available to astronomers has opened up the possibility to uncover fundamental correlations, linking the dust component of a galaxy to its star formation rate (SFR). In this paper, we…

Astrophysics of Galaxies · Physics 2022-02-23 Ciro Pappalardo , George J. Bendo , Mederic Boquien , Maarten Baes , Sebastien Viaene , Simone Bianchi , Jacopo Fritz

Accurate measurement of galaxy structures is a prerequisite for quantitative investigation of galaxy properties or evolution. Yet, the impact of galaxy inclination and dust on commonly used metrics of galaxy structure is poorly quantified.…

Astrophysics of Galaxies · Physics 2017-03-23 Brian Devour , Eric Bell

How do stars manage to form within low-density, HI-dominated gas? Such environments provide a laboratory for studying star formation with physical conditions distinct from starbursts and the metal-rich disks of spiral galaxies where most…

We present a simple, largely empirical but physically motivated model, which is designed to interpret consistently multi-wavelength observations from large samples of galaxies in terms of physical parameters, such as star formation rate,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Elisabete da Cunha , Stephane Charlot , David Elbaz

We investigate the evolution of dust content in galaxies from redshifts z=0 to z=9.5. Using empirically motivated prescriptions, we model galactic-scale properties -- including halo mass, stellar mass, star formation rate, gas mass, and…

Astrophysics of Galaxies · Physics 2018-02-21 Nia Imara , Abraham Loeb , Benjamin D. Johnson , Charlie Conroy , Peter Behroozi

Near-infrared surveys have revealed a substantial population of enigmatic faint galaxies with extremely red optical-to-near-infrared colours and with a sky surface density comparable to that of faint quasars. There are two scenarios for…

Astrophysics · Physics 2009-10-30 Andrea Cimatti , Paola Andreani , Huub Röttgering , Remo Tilanus

Dust emission at sub-millimetre wavelengths allows us to trace the early phases of star formation in the Universe. In order to understand the physical processes involved in this mode of star formation, it is essential to gain knowledge…

Half of the energy ever emitted by stars and accreting objects comes to us in the FIR waveband and has yet to be properly explored. We propose a powerful Far-InfraRed Interferometer mission, FIRI, to carry out high-resolution imaging…

Astrophysics · Physics 2009-11-13 Frank Helmich , Rob Ivison

Interstellar dust appears in a number of roles in the interstellar medium. Historically, the most familiar one is as a source of extinction in the optical. Absorbed optical and ultraviolet light heats the dust, whence infrared (including…

Astrophysics · Physics 2016-08-30 P. G. Martin

I review the current state of our understanding of the galaxy formation and evolution process from the modeler's perspective. With the advent of the cold dark matter model and the support of fast computers and advanced simulation…

Astrophysics · Physics 2007-05-23 Matthias Steinmetz
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