output
19932026
most citedThe Gaia mission

7.1k citations

Showing 2012Show all

87 papers · 1 filter

astro-ph.HE2012★ 99 cited

Multiwavelength observations of GRB 110731A: GeV emission from onset to afterglow

LAT Collaboration, GBM Collaboration, Swift Collaboration +2

We report on the multiwavelength observations of the bright, long gamma-ray burst \GRB, by the \Fermi and \Swift observatories, and by the MOA and GROND optical telescopes. The ana…

astro-ph.HE2012★ 4 cited

VLBI Imagings of Kilo-parsec Knot in 3C 380

Shoko Koyama, Motoki Kino, Hiroshi Nagai +3

We investigate observational properties of a kilo-parsec scale knot in radio-loud quasar 3C 380 by using two epoch archival data obtained by Very Long Baseline Interferometry (VLBI…

astro-ph.CO2012★ 26 cited

Kinematics of the Compact Symmetric Object OQ 208 revisited

Fang Wu, Tao An, Willem A. Baan +6

Aims. A long timeline kinematic study of the archetypal CSO OQ 208 sheds light on the physical properties of the most compact radio sources. Methods. Archival data from the VLBA at…

astro-ph.HE2012★ 115 cited

Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations

H. J. Pletsch, L. Guillemot, H. Fehrmann +150

Millisecond pulsars, old neutron stars spun-up by accreting matter from a companion star, can reach high rotation rates of hundreds of revolutions per second. Until now, all such "…

astro-ph.CO2012★ 37 cited

The faint source population at 15.7 GHz - I. The radio properties

I. H. Whittam, J. M. Riley, D. A. Green +6

We have studied a sample of 296 faint (> 0.5 mJy) radio sources selected from an area of the Tenth Cambridge (10C) survey at 15.7 GHz in the Lockman Hole. By matching this catalogu…

astro-ph.CO2012★ 2 cited

Radio observations of Planck clusters

Ruta Kale

Recently, a number of new galaxy clusters have been detected by the ESA-Planck satellite, the South Pole Telescope and the Atacama Cosmology Telescope using the Sunyaev-Zeldovich e…

astro-ph.CO2012★ 148 cited

Rise and Fall of Radio Halos in Simulated Merging Galaxy Clusters

Julius Donnert, Klaus Dolag, Gianfranco Brunetti +1

We present the first high resolution MHD simulation of cosmic-ray electron reacceleration by turbulence in cluster mergers. We use an idealised model for cluster mergers, combined…

astro-ph.GA2012★ 103 cited

Early stages of cluster formation: fragmentation of massive dense cores down to ~1000 AU

Aina Palau, Asunción Fuente, Josep M. Girart +11

In order to study the fragmentation of massive dense cores, which constitute the cluster cradles, we observed with the PdBI in the most extended configuration the continuum at 1.3…

astro-ph.CO2012★ 96 cited

Properties of gas clumps and gas clumping factor in the intra cluster medium

F. Vazza, D. Eckert, A. Simionescu +2

The spatial distribution of gas matter inside galaxy clusters is not completely smooth, but may host gas clumps associated with substructures. These overdense gas substructures are…

astro-ph.CO2012★ 273 cited

The Imprint of The Extragalactic Background Light in the Gamma-Ray Spectra of Blazars

LAT Collaboration

The light emitted by stars and accreting compact objects through the history of the Universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of t…

astro-ph.GA2012★ 60 cited

Different evolutionary stages in massive star formation. Centimeter continuum and H2O maser emission with ATCA

A. Sanchez-Monge, M. T. Beltran, R. Cesaroni +5

We present ATCA observations of the H2O maser line and radio continuum at 18.0GHz and 22.8GHz, toward a sample of 192 massive star forming regions containing several clumps already…

astro-ph.CO2012★ 70 cited

Low frequency follow up of radio halos and relics in the GMRT Radio Halo Cluster Survey

Tiziana Venturi, Simona Giacintucci, Daniele Dallacasa +4

We performed GMRT low frequency observations of the radio halos, relics and new candidates belonging to the GMRT Radio Halo Cluster Sample first observed at 610 MHz. High sensitivi…

astro-ph.CO2012★ 101 cited

Radio Continuum Surveys with Square Kilometre Array Pathfinders

Ray P. Norris, J. Afonso, D. Bacon +48

In the lead-up to the Square Kilometre Array (SKA) project, several next-generation radio telescopes and upgrades are already being built around the world. These include APERTIF (T…

astro-ph.CO2012★ 13 cited

Chandra observations of dying radio sources in galaxy clusters

M. Murgia, M. Markevitch, F. Govoni +4

The dying radio sources represent a very interesting and largely unexplored stage of the active galactic nucleus (AGN) evolution. They are considered to be very rare, and almost al…

astro-ph.HE2012★ 54 cited

Chandra Observations of 3C Radio Sources with z<0.3 II: completing the snapshot survey

F. Massaro, G. R. Tremblay, D. E. Harris +14

We report on the second round of Chandra observations of the 3C snapshot survey developed to observe the complete sample of 3C radio sources with z<0.3 for 8 ksec each. In the firs…

astro-ph.CO2012★ 19 cited

Spectral Energy Distributions of low-luminosity radio galaxies at z~1-3: a high-z view of the host/AGN connection

Ranieri D. Baldi, Marco Chiaberge, Alessandro Capetti +3

We study the Spectral Energy Distributions, SEDs, (from FUV to MIR bands) of the first sizeable sample of 34 low-luminosity radio galaxies at high redshifts, selected in the COSMOS…

astro-ph.HE2012★ 66 cited

Radio and gamma-ray follow-up of the exceptionally high activity state of PKS 1510-089 in 2011

M. Orienti, S. Koyama, F. D'Ammando +24

We investigate the radio and gamma-ray variability of the flat spectrum radio quasar PKS 1510-089 in the time range between 2010 November and 2012 January. In this period the sourc…

astro-ph.CO2012★ 43 cited

Thermal and non-thermal traces of AGN feedback: results from cosmological AMR simulations

F. Vazza, M. Brueggen, C. Gheller

We investigate the observable effects of feedback from Active Galactic Nuclei (AGN) on non-thermal components of the intracluster medium (ICM). We have modelled feedback from AGN i…

astro-ph.HE2012★ 24 cited

GENJI Programme: Gamma-ray Emitting Notable AGN Monitoring by Japanese VLBI

Hiroshi Nagai, Motoki Kino, Kotaro Niinuma +11

We introduce the GENJI program (Gamma-ray Emitting Notable AGN Monitoring by Japanese VLBI), which is a monitoring program of gamma-ray bright AGNs with the VERA array (VLBI Explor…

astro-ph.CO2012★ 15 cited

The Planck-ATCA Co-eval Observations (PACO) project: the spectrally-selected sample

Anna Bonaldi, Laura Bonavera, Marcella Massardi +1

The Planck-ATCA Co-eval Observations (PACO) have provided multi-frequency (5-40 GHz) flux density measurements of complete samples of Australia Telescope 20 GHz (AT20G) radio sourc…

astro-ph.GA2012★ 2 cited

Molecular gas and stars in the translucent cloud MBM 18 (LDN 1569)

J. Brand, J. G. A. Wouterloot, L. Magnani

Seven of ten candidate H-alpha emission-line stars found in an objective grism survey of a 1 square degree region in MBM 18, were observed spectroscopically. Four of these have wea…

astro-ph.GA2012★ 120 cited

M87 at metre wavelengths: the LOFAR picture

F. de Gasperin, E. Orru', M. Murgia +92

M87 is a giant elliptical galaxy located in the centre of the Virgo cluster, which harbours a supermassive black hole of mass 6.4x10^9 M_sun, whose activity is responsible for the…

astro-ph.CO2012★ 77 cited

Radio Halos in future surveys in the radio continuum

R. Cassano, G. Brunetti, Ray P. Norris +3

Giant radio halos (RH) are Mpc-scale synchrotron sources detected in a significant fraction of massive and merging galaxy clusters.Their statistical properties can be used to discr…

astro-ph.HE2012★ 51 cited

Radio Detection of the Fermi LAT Blind Search Millisecond Pulsar J1311-3430

P. S. Ray, S. M. Ransom, C. C. Cheung +15

We report the detection of radio emission from PSR J1311-3430, the first millisecond pulsar discovered in a blind search of Fermi Large Area Telescope (LAT) gamma-ray data. We dete…