output
19912026
Showing 2010 · astro-ph.GAShow all

24 papers · 2 filters

astro-ph.GA2010★ 23 cited

Spectral Index as a Function of Mass Accretion Rate in Black Hole Sources. Monte-Carlo Simulations and an Analytical Description

Philippe Laurent, Lev Titarchuk

In this Paper, we present theoretical arguments that the observationally established index saturation effect vs mass accretion rate is a signature of the bulk (converging) flow ont…

astro-ph.GA2010★ 27 cited

A method to determine distances to molecular clouds using near-IR photometry

G. Maheswar, C. -W. Lee, H. C. Bhatt +2

Aims: We aim to develop a method to determine distances to molecular clouds using JHK near-infrared photometry. Methods: The method is based on a technique that aids spectral class…

astro-ph.GA2010★ 68 cited

Discovery of Nuclear X-ray Sources in SINGS Galaxies

Catherine J. Grier, Smita Mathur, Himel Ghosh +1

We present the results of a search for nuclear X-ray activity in nearby galaxies using Chandra archival data in a sample of 62 galaxies from the Spitzer Infrared Nearby Galaxy Surv…

astro-ph.GA2010★ 15 cited

Statistical study of dust properties in LMC molecular clouds

D. Paradis, W. T. Reach, J. P. Bernard +6

The objective of this paper is to construct a catalog providing the dust properties and the star formation efficiency (SFE) of the molecular clouds in the Large Magellanic Cloud (L…

astro-ph.GA2010★ 118 cited

The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification I

Paul M. Woods, J. M. Oliveira, F. Kemper +55

We present the classification of 197 point sources observed with the Infrared Spectrograph in the SAGE-Spec Legacy program on the Spitzer Space Telescope. We introduce a decision-t…

astro-ph.GA2010★ 62 cited

X-ray and radio variability in the low luminosity Active Galactic Nucleus NGC 7213

M. E. Bell, T. Tzioumis, P. Uttley +7

We present the results of a ~ 3 year campaign to monitor the low luminosity active galactic nucleus (LLAGN) NGC 7213 in the radio (4.8 and 8.4 GHz) and X-ray bands (2-10 keV). With…

astro-ph.GA2010★ 338 cited

Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT

LAT Collaboration

Pulsars are rapidly-rotating, highly-magnetized neutron stars emitting radiation across the electromagnetic spectrum. Although there are more than 1800 known radio pulsars, until r…

astro-ph.GA2010★ 69 cited

A statistical study of the mass and density structure of Infrared Dark Clouds

N. Peretto, G. A. Fuller

How and when the mass distribution of stars in the Galaxy is set is one of the main issues of modern astronomy. Here we present a statistical study of mass and density distribution…

astro-ph.GA2010★ 118 cited

Gas dynamics in Massive Dense Cores in Cygnus-X

T. Csengeri, S. Bontemps, N. Schneider +2

We study the kinematic properties of dense gas surrounding massive protostars recognized by Bontemps et a. (2010) in a sample of five Massive Dense Cores in Cygnus-X. We investigat…

astro-ph.GA2010★ 37 cited

Distribution of satellite galaxies in high redshift groups

Yougang Wang, Changbom Park, Ho Seong Hwang +1

We use galaxy groups at redshifts between 0.4 and 1.0 selected from the Great Observatories Origins Deep Survey (GOODS) to study the color-morphological properties of satellite gal…

astro-ph.GA2010★ 1.5k cited

From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey

Ph. André, A. Men'shchikov, S. Bontemps +54

We summarize the first results from the Gould Belt survey, obtained toward the Aquila Rift and Polaris Flare regions during the 'science demonstration phase' of Herschel. Our 70-50…

astro-ph.GA2010★ 80 cited

Herschel Observations of the W43 "mini-starburst"

J. Bally, L. D. Anderson, C. Battersby +20

Aims: To explore the infrared and radio properties of one of the closest Galactic starburst regions. Methods: Images obtained with the Herschel Space Observatory at wavelengths of…

astro-ph.GA2010★ 41 cited

Small-scale structure in the Rosette molecular cloud revealed by Herschel

J. Di Francesco, S. Sadavoy, F. Motte +40

We present a preliminary analysis of the small-scale structure found in new 70-520 micron continuum maps of the Rosette molecular cloud (RMC), obtained with the SPIRE and PACS inst…

astro-ph.GA2010★ 47 cited

Herschel observations of embedded protostellar clusters in the Rosette Molecular Cloud

M. Hennemann, F. Motte, S. Bontemps +39

The Herschel OB young stellar objects survey (HOBYS) has observed the Rosette molecular cloud, providing an unprecedented view of its star formation activity. These new far-infrare…

astro-ph.GA2010★ 264 cited

Filamentary structures and compact objects in the Aquila and Polaris clouds observed by Herschel

A. Men'shchikov, Ph. André, P. Didelon +36

Our PACS and SPIRE images of the Aquila Rift and part of the Polaris Flare regions, taken during the science demonstration phase of Herschel discovered fascinating, omnipresent fil…

astro-ph.GA2010★ 315 cited

Black hole accretion and star formation as drivers of gas excitation and chemistry in Mrk231

P. P. Van der Werf, K. G. Isaak, R. Meijerink +34

We present a full high resolution SPIRE FTS spectrum of the nearby ultraluminous infrared galaxy Mrk231. In total 25 lines are detected, including CO J=5-4 through J=13-12, 7 rotat…

astro-ph.GA2010★ 137 cited

The Herschel first look at protostars in the Aquila Rift

S. Bontemps, Ph. Andre, V. Konyves +40

As part of the science demonstration phase of the Herschel mission of the Gould Belt Key Program, the Aquila Rift molecular complex has been observed. The complete ~ 3.3deg x 3.3de…

astro-ph.GA2010★ 104 cited

A Herschel study of the properties of starless cores in the Polaris Flare dark cloud region using PACS and SPIRE

D. Ward-Thompson, J. M. Kirk, P. André +32

The Polaris Flare cloud region contains a great deal of extended emission. It is at high declination and high Galactic latitude. It was previously seen strongly in IRAS Cirrus emis…

astro-ph.GA2010★ 121 cited

Star formation triggered by the Galactic HII region RCW 120: First results from the Herschel Space Observatory

A. Zavagno, D. Russeil, F. Motte +10

By means of different physical mechanisms, the expansion of HII regions can promote the formation of new stars of all masses. RCW 120 is a nearby Galactic HII region where triggere…

astro-ph.GA2010★ 77 cited

The Angular Momentum of Magnetized Molecular Cloud Cores: A 2D-3D Comparison

Sami Dib, Patrick Hennebelle, Jaime E. Pineda +4

We study the rotational properties of magnetized and self-gravitating molecular cloud cores formed in 2 very high resolution 3D molecular cloud simulations.The simulations have bee…

astro-ph.GA2010★ 363 cited

Dynamic star formation in the massive DR21 filament

N. Schneider, T. Csengeri, S. Bontemps +5

The formation of massive stars is a highly complex process in which it is not clear whether the star-forming gas is in global gravitational collapse or in an equilibrium state, sup…

astro-ph.GA2010★ 162 cited

A population of gamma-ray emitting globular clusters seen with the Fermi Large Area Telescope

The Fermi LAT collaboration

Globular clusters with their large populations of millisecond pulsars (MSPs) are believed to be potential emitters of high-energy gamma-ray emission. Our goal is to constrain the m…

astro-ph.GA2010★ 39 cited

Fermi Large Area Telescope observations of PSR J1836+5925

The Fermi LAT Collaboration

The discovery of the gamma-ray pulsar PSR J1836+5925, powering the formerly unidentified EGRET source 3EG J1835+5918, was one of the early accomplishments of the Fermi Large Area T…

astro-ph.GA2010★ 158 cited

Toward understanding the formation of multiple systems - A pilot IRAM-PdBI survey of Class 0 objects

A. J. Maury, Ph. Andre, P. Hennebelle +6

The formation process of binary stars and multiple systems is poorly understood. Here, we seek to determine the typical outcome of protostellar collapse and to constrain models of…