output
19932026
Showing 2014 · astro-ph.GAShow all

80 papers · 2 filters

astro-ph.GA2014★ 13 cited

Seven broad absorption line quasars with excess broad band absorption near 2250 Å

Shaohua Zhang, Jian Ge, Peng Jiang +6

We report the discovery of excess broad band absorption near 2250 A (EBBA) in the spectra of seven broad absorption line (BAL) quasars. By comparing with the statistical results fr…

astro-ph.GA2014★ 5 cited

Recent stellar mass assembly of low-mass star-forming galaxies at redshifts 0.3 < z < 0.9

Lucía Rodríguez-Muñoz, Jesús Gallego, Camilla Pacifici +5

The epoch when low-mass star forming galaxies (LMSFGs) form the bulk of their stellar mass is uncertain. While some models predict an early formation, others favor a delayed scenar…

astro-ph.GA2014★ 25 cited

The evolution of the cluster optical galaxy luminosity function between z=0.4 and 0.9 in the DAFT/FADA survey

Nicolas Martinet, Florence Durret, Loic Guennou +8

We compute optical galaxy luminosity functions (GLFs) in the B, V, R, and I rest-frame bands for one of the largest medium-to-high-redshift (0.4 < z < 0.9) cluster samples to date…

astro-ph.GA2014★ 10 cited

Structure of the nucleus of 1928+738

J. Roland, S. Britzen, E. Kun +3

Modeling of the trajectories of VLBI components ejected by the nucleus of 1928+738 shows the VLBI jet contains three families of trajectories, i.e. VLBI components are ejected from…

astro-ph.GA2014★ 7 cited

OH and H2O maser variations in W33B

P. Colom, E. E. Lekht, M. I. Pashchenko +1

The active star-forming region W33B is a source of OH and H2O maser emission located in distinct zones around the central object. The aim was to obtain the complete Stokes pattern…

astro-ph.GA2014★ 35 cited

Disk fragmentation and the formation of population III stars

M. A. Latif, D. R. G. Schleicher

Our understanding of population III star formation is still in its infancy. They are formed in dark matter minihalos of at . Recent high resoluti…

astro-ph.GA2014★ 272 cited

Herschel Survey of Galactic OH+, H2O+, and H3O+: Probing the Molecular Hydrogen Fraction and Cosmic-Ray Ionization Rate

Nick Indriolo, D. A. Neufeld, M. Gerin +19

In diffuse interstellar clouds the chemistry that leads to the formation of the oxygen bearing ions OH+, H2O+, and H3O+ begins with the ionization of atomic hydrogen by cosmic rays…

astro-ph.GA2014★ 85 cited

On the importance of using appropriate spectral models to derive physical properties of galaxies at 0.7<z<2.8

Camilla Pacifici, Elisabete da Cunha, Stéphane Charlot +14

Interpreting observations of distant galaxies in terms of constraints on physical parameters - such as stellar mass, star-formation rate (SFR) and dust optical depth - requires spe…

astro-ph.GA2014★ 56 cited

Exceptional AGN-driven turbulence inhibits star formation in the 3C 326N radio-galaxy

P. Guillard, F. Boulanger, M. D. Lehnert +4

We detect bright [CII]158m line emission from the radio galaxy 3C 326N at z=0.09, which shows weak star formation (M~yr) despite having strong H l…

astro-ph.GA2014★ 190 cited

Reconstructing the star formation history of the Milky Way disc(s) from chemical abundances

O. Snaith, M. Haywood, P. Di Matteo +4

We develop a chemical evolution model in order to study the star formation history of the Milky Way. Our model assumes that the Milky Way is formed from a closed box-like system in…

astro-ph.GA2014★ 75 cited

Why the Milky Way's bulge is not only a bar formed from a cold thin disk

P. Di Matteo, A. Gomez, M. Haywood +6

By analyzing a N-body simulation of a bulge formed simply via a bar instability mechanism operating on a kinematically cold stellar disk, and by comparing the results of this analy…

astro-ph.GA2014

The formation of supermassive black holes in rapidly rotating disks

M. A. Latif, D. R. G. Schleicher

Massive primordial halos exposed to moderate UV backgrounds are the potential birthplaces of supermassive black holes. In such a halo, an initially isothermal collapse will occur,…

astro-ph.GA2014★ 111 cited

Planck intermediate results. XXXIII. Signature of the magnetic field geometry of interstellar filaments in dust polarization maps

Planck Collaboration, P. A. R. Ade, N. Aghanim +187

Planck observations at 353GHz provide the first fully-sampled maps of the polarized dust emission towards interstellar filaments and their backgrounds. The polarization data provid…

astro-ph.GA2014★ 112 cited

Constraining the primordial initial mass function with stellar archaeology

Tilman Hartwig, Volker Bromm, Ralf S. Klessen +1

We present a new near-field cosmological probe of the initial mass function (IMF) of the first stars. Specifically, we constrain the lower-mass limit of the Population III (Pop III…

astro-ph.GA2014★ 20 cited

Collisional excitation of water by hydrogen atoms

F. Daniel, A. Faure, P. J. Dagdigian +3

We present quantum dynamical calculations that describe the rotational excitation of HO due to collisions with H atoms. We used a recent, high accuracy potential energy surface…

astro-ph.GA2014★ 229 cited

Legacy ExtraGalactic UV Survey (LEGUS) with The Hubble Space Telescope. I. Survey Description

D. Calzetti, J. C. Lee, E. Sabbi +46

The Legacy ExtraGalactic UV Survey (LEGUS) is a Cycle 21 Treasury program on the Hubble Space Telescope, aimed at the investigation of star formation and its relation with galactic…

astro-ph.GA2014★ 101 cited

[CII] absorption and emission in the diffuse interstellar medium across the Galactic Plane

M. Gerin, M. Ruaud, J. R. Goicoechea +10

Ionized carbon is the main gas-phase reservoir of carbon in the neutral diffuse interstellar medium and its 158 micron fine structure transition [CII] is the most important cooling…

astro-ph.GA2014★ 47 cited

The Gaia-ESO Survey: Extracting diffuse interstellar bands from cool star spectra, DIB-based interstellar medium line-of-sight structures at the kpc scale

L. Puspitarini, R. Lallement, C. Babusiaux +26

We study how diffuse interstellar bands (DIBs) measured toward distance-distributed target stars can be used to locate dense interstellar (IS) clouds in the Galaxy and probe a line…

astro-ph.GA2014★ 35 cited

The High A(V) Quasar Survey: Reddened quasi-stellar objects selected from optical/near-infrared photometry - II

J. -K. Krogager, S. Geier, J. P. U. Fynbo +9

Quasi-stellar objects (QSOs) whose spectral energy distributions (SEDs) are reddened by dust either in their host galaxies or in intervening absorber galaxies are to a large degree…

astro-ph.GA2014★ 112 cited

The stellar accretion origin of stellar population gradients in massive galaxies at large radii

Michaela Hirschmann, Thorsten Naab, Jeremiah P. Ostriker +5

We investigate the evolution of stellar population gradients from to in massive galaxies at large radii () using ten cosmological zoom simulation…

astro-ph.GA2014★ 156 cited

The SL2S Galaxy-scale Lens Sample. V. Dark Matter Halos and Stellar IMF of Massive Early-type Galaxies out to Redshift 0.8

Alessandro Sonnenfeld, Tommaso Treu, Philip J. Marshall +4

We investigate the cosmic evolution of the internal structure of massive early-type galaxies over half of the age of the Universe. We perform a joint lensing and stellar dynamics a…

astro-ph.GA2014★ 134 cited

Variations of the stellar initial mass function in the progenitors of massive early-type galaxies and in extreme starburst environments

G. Chabrier, P. Hennebelle, P. Charlot

We examine variations of the stellar initial mass function (IMF) in extreme environments within the formalism derived by Hennebelle \& Chabrier. We focus on conditions encountered…

astro-ph.GA2014★ 197 cited

[CII] 158 m Emission as a Star Formation Tracer

R. Herrera-Camus, A. D. Bolatto, M. G. Wolfire +23

The [CII] 157.74 m transition is the dominant coolant of the neutral interstellar gas, and has great potential as a star formation rate (SFR) tracer. Using the Herschel KINGFISH…

astro-ph.GA2014★ 73 cited

Cool dust heating and temperature mixing in nearby star-forming galaxies

L. K. Hunt, B. T. Draine, S. Bianchi +20

Physical conditions of the interstellar medium in galaxies are closely linked to the ambient radiation field and the heating of dust grains. In order to characterize dust propertie…