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The fundamental process of star formation in galaxies involves the interplay between the fueling of star formation via molecular gas and the feedback from recently formed massive stars. This process, by which galaxies evolve, is also…

We have analyzed a sample of nearby cool and warm infrared (IR) galaxies using photometric and structural parameters. The set of measures include far-infrared color ($C = \log_{10}[S_{60\mu m}/S_{100\mu m}]$), total IR luminosity…

Astrophysics · Physics 2008-11-26 Nurur Rahman , George Helou , Joseph M. Mazzarella

We present the first full FIR spectrum of Centaurus A (NGC 5128) from 43 - 196.7 um. The data was obtained with the ISO Long Wavelength Spectrometer (LWS). We conclude that the FIR emission in a 70 arcsec beam centred on the nucleus is…

At $z=1-3$, the formation of new stars is dominated by dusty galaxies whose far-IR emission indicates they contain colder dust than local galaxies of a similar luminosity. We explore the reasons for the evolving IR emission of similar…

The equivalent widths of MgII absorption in the circumgalactic medium (CGM) trace the global star formation rate up to $z<6$, are larger for star-forming galaxies than passively-evolving galaxies, and decrease with increasing distance from…

Astrophysics of Galaxies · Physics 2016-03-09 Nikole M. Nielsen , Christopher W. Churchill , Glenn G. Kacprzak , Michael T. Murphy , Jessica L. Evans

A summary is presented for 130 galaxies observed with the Herschel PACS instrument to measure fluxes for the [CII] 158 um emission line. Sources cover a wide range of active galactic nucleus to starburst classifications, as derived from…

Our objectives are to determine the properties of the interstellar medium (ISM) and of star-formation in typical star-forming galaxies at high redshift. Following up on our previous multi-wavelength observations with HST, Spitzer, Herschel,…

Astrophysics of Galaxies · Physics 2015-03-18 D. Schaerer , F. Boone , T. Jones , M. Dessauges-Zavadsky , P. Sklias , M. Zamojski , A. Cava , J. Richard , R. Ellis , T. D. Rawle , E. Egami , F. Combes

The (2P3/2 -> 2P1/2) transition of singly--ionized carbon, [CII], is the primary coolant of diffuse interstellar gas. We describe observations of [CII] emission towards nine high Galactic latitude translucent molecular clouds, made with the…

Astrophysics · Physics 2009-11-07 James G. Ingalls , William T. Reach , T. M. Bania

We study the multi-phase circumgalactic medium (CGM) of emission line galaxies (ELGs) at $z\sim1.5$, traced by MgII$\lambda2796$, $\lambda2803$ and CIV$\lambda1548$, $\lambda1550$ absorption lines, using approximately 7,000 ELG-quasar pairs…

We present the equivalent width and column density measurements for low and intermediate ionization states of the circumgalactic medium (CGM) surrounding 44 low-z, L ~ L* galaxies drawn from the COS-Halos survey. These measurements are…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Jessica Werk , J. Xavier Prochaska , Christopher Thom , Jason Tumlinson , Todd Tripp , John O'Meara , Molly Peeples

We present long-slit spectrophotometric observations in the red and near infrared of 12 HII galaxies. The spectral range includes the sulphur lines [SII] at wavelengths 6716, 6731 angstroms and [SIII] at 6312 angstroms and 9069, 9532…

Astrophysics · Physics 2009-11-10 Enrique Perez-Montero , Angeles I. Diaz

We present Herschel spectroscopy of atomic lines arising in photodissociation regions as well as ionization regions of nearby early-type galaxies (ETGs), focusing on the volume-limited Atlas3D sample. Our data include the [CII], [OI], and…

Astrophysics of Galaxies · Physics 2017-05-10 Ryen Carl Lapham , Lisa M. Young , Alison Crocker

[Abridged] The [OIII]$_{88\mu m}$/[CII]$_{158\mu m}$ and [OIII]$_{88\mu m}$/[NII]$_{122\mu m}$ luminosity ratios have shown to be promising tracers of the ionisation state and gas-phase metallicity of the ISM. Observations of galaxies at…

Astrophysics of Galaxies · Physics 2025-10-29 Camilla T. Nyhagen , Alice Schimek , Claudia Cicone , Davide Decataldo , Sijing Shen

Extreme emission-line galaxies (EELGs) at redshift z=1-2 provide a unique view of metal-poor, starburst sources that are the likely drivers of the cosmic reionization at z$\geq6$. However, the molecular gas reservoirs of EELGs - the fuel…

We study the effects of a metallicity variation on the thermal balance and [CII] fine-structure line strengths in interstellar photon dominated regions (PDRs). We find that a reduction in the dust-to-gas ratio and the abundance of heavy…

Astrophysics · Physics 2009-11-11 M. Röllig , V. Ossenkopf , S. Jeyakumar , J. Stutzki , A. Sternberg

Using the IRAM Plateau de Bure Interferometer, we report the detection of the 158 micron [CII] emission line and underlying dust continuum in the host galaxy of the quasar ULAS J112001.48+064124.3 (hereafter J1120+0641) at…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 B. P. Venemans , R. G. McMahon , F. Walter , R. Decarli , P. Cox , R. Neri , P. Hewett , D. J. Mortlock , C. Simpson , S. J. Warren

Far-infrared spectroscopy obtained with the ISO LWS has shown that there is strong variation (more than 2 orders of magnitude) in the [C II]/FIR ratios in galaxies extending from blue compact dwarfs, to normal and starburst galaxies, down…

Astrophysics · Physics 2007-05-23 Jacqueline Fischer

A powerful tool to probe the gas content at high redshift is the [C II] 158 $\mu$m sub-millimeter emission line, which, due to its low excitation potential and luminous emission, is considered a possible direct tracer of star forming gas.…

Astrophysics of Galaxies · Physics 2024-09-11 Benedetta Casavecchia , Umberto Maio , Céline Péroux , Benedetta Ciardi

We present new data obtained with the Submillimeter Array for a sample of fourteen nearby luminous and ultraluminous infrared galaxies. The galaxies were selected to have luminosity distances D < 200 Mpc and far-infrared luminosities…

Using the 12m APEX telescope, we have detected redshifted emission from the 157.74micron [CII] line in the z=4.4074 quasar BRI1335-0417. The linewidth and redshift are in good agreement with previous observations of high-J CO line emission.…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Jeff Wagg , Chris L. Carilli , David J. Wilner , Pierre Cox , Carlos De Breuck , Karl Menten , Dominik Riechers , Fabian Walter