Institut de Planétologie et d'Astrophysique de Grenoble

output

19952026

most citedPlanck 2015 results. XIII. Cosmological parameters

10.6k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2014 · astro-ph.HEShow all

24 papers · 2 filters

astro-ph.HE2014★ 30 cited

H.E.S.S. detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud

H. E. S. S. Collaboration, :, A. Abramowski +224

G349.7+0.2 is a young Galactic supernova remnant (SNR) located at the distance of 11.5 kpc and observed across the entire electromagnetic spectrum from radio to high energy (HE) Ga…

astro-ph.HE2014★ 29 cited

H.E.S.S. reveals a lack of TeV emission from the supernova remnant Puppis A

H. E. S. S. Collaboration, :, A. Abramowski +224

Puppis A is an interesting ~4 kyr-old supernova remnant (SNR) that shows strong evidence of interaction between the forward shock and a molecular cloud. It has been studied in deta…

astro-ph.HE2014★ 105 cited

Diffuse Galactic gamma-ray emission with H.E.S.S

H. E. S. S. Collaboration, :, A. Abramowski +225

Diffuse $γ$ -ray emission is the most prominent observable signature of celestial cosmic-ray interactions at high energies. While already being investigated at GeV energies over sev…

astro-ph.HE2014★ 27 cited

Discovery of the VHE gamma-ray source HESS J1832-093 in the vicinity of SNR G22.7-0.2

H. E. S. S. Collaboration, :, A. Abramowski +218

The region around the supernova remnant (SNR) W41 contains several TeV sources and has prompted the H.E.S.S. Collaboration to perform deep observations of this field of view. This…

astro-ph.HE2014★ 33 cited

The high-energy $γ$ -ray emission of AP Librae

H. E. S. S. Collaboration, Fermi-LAT collaborations

The $γ$ -ray spectrum of the low-frequency-peaked BL Lac (LBL) object AP Librae is studied, following the discovery of very-high-energy (VHE; $E > 100 GeV$ ) $γ$ -ray emission up…

astro-ph.HE2014★ 112 cited

Search for dark matter annihilation signatures in H.E.S.S. observations of Dwarf Spheroidal Galaxies

H. E. S. S. Collaboration, :, A. Abramowski +229

Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of non-thermal h…

astro-ph.HE2014★ 32 cited

Dissipative effects on the sustainment of a magnetorotational dynamo in Keplerian shear flow

A. Riols, F. Rincon, C. Cossu +3

The magnetorotational (MRI) dynamo has long been considered one of the possible drivers of turbulent angular momentum transport in astrophysical accretion disks. However, various n…

astro-ph.HE2014★ 12 cited

Multiwavelength campaign on Mrk 509 XIV. Chandra HETGS spectra

J. S. Kaastra, J. Ebrero, N. Arav +14

We present in this paper the results of a 270 ks Chandra HETGS observation in the context of a large multiwavelength campaign on the Seyfert galaxy Mrk 509. The HETGS spectrum allo…

astro-ph.HE2014★ 31 cited

Long-term monitoring of PKS 2155 $-$ 304 with ATOM and H.E.S.S.: investigation of optical/ $γ$ -ray correlations in different spectral states

A. Abramowski, F. Aharonian, F. Ait Benkhali +225

In this paper we report on the analysis of all the available optical and very high-energy $γ$ -ray ( $>$ 200 GeV) data for the BL Lac object PKS 2155 $-$ 304, collected simultaneously w…

astro-ph.HE2014★ 47 cited

Discovery of the hard spectrum VHE gamma-ray source HESS J1641-463

H. E. S. S. Collaboration, :, A. Abramowski +230

This letter reports the discovery of a remarkably hard spectrum source, HESS J1641-463, by the High Energy Stereoscopic System (H.E.S.S.) in the very-high energy (VHE) domain. HESS…

astro-ph.HE2014★ 29 cited

Probing the gamma-ray emission from HESS J1834-087 using H.E.S.S. and Fermi LAT observations

The H. E. S. S. Collaboration, :, A. Abramowski +228

Previous observations with HESS have revealed the existence of an extended very-high-energy (VHE; E>100 GeV) gamma-ray source, HESS J1834-087, coincident with the SNR W41. The orig…

astro-ph.HE2014★ 247 cited

A fast and long-lived outflow from the supermassive black hole in NGC 5548

J. S. Kaastra, G. A. Kriss, M. Cappi +31

Supermassive black holes in the nuclei of active galaxies expel large amounts of matter through powerful winds of ionized gas. The archetypal active galaxy NGC 5548 has been studie…

astro-ph.HE2014★ 14 cited

A fast current-driven instability in relativistic collisionless shocks

Martin Lemoine, Guy Pelletier, Laurent Gremillet +1

We report here on a fast current-driven instability at relativistic collisionless shocks, triggered by the perpendicular current carried by the supra-thermal particles as they gyra…

astro-ph.HE2014★ 251 cited

Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +213

The long gamma-ray burst (GRB) 100621A, at the time the brightest X-ray transient ever detected by Swift-XRT in the $0.3 - 10$ keV range, has been observed with the H.E.S.S…

astro-ph.HE2014★ 30 cited

Multiwavelength campaign on Mrk 509. XIII. Testing ionized-reflection models on Mrk 509

R. Boissay, S. Paltani, G. Ponti +12

Active Galactic Nuclei (AGN) are the most luminous persistent objects in the universe. An excess of X-ray emission below about 2 keV, called soft-excess, is very common in Type 1 A…

astro-ph.HE2014★ 33 cited

Extreme Blazars Studied with Fermi-LAT and Suzaku: 1ES 0347-121 and Blazar Candidate HESS J1943+213

Y. T. Tanaka, L. Stawarz, J. Finke +9

We report on our study of high-energy properties of two peculiar TeV emitters: the "extreme blazar" 1ES 0347-121 and the "extreme blazar candidate" HESS J1943+213 located near the…

astro-ph.HE2014★ 23 cited

TeV γ-ray observations of the young synchrotron-dominated SNRs G1.9+0.3 and G330.2+1.0 with H.E.S.S

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +217

The non-thermal nature of the X-ray emission from the shell-type supernova remnants (SNRs) G1.9+0.3 and G330.2+1.0 is an indication of intense particle acceleration in the shock fr…

astro-ph.HE2014★ 166 cited

Warm absorbers in X-rays (WAX), a comprehensive high resolution grating spectral study of a sample of Seyfert galaxies: I. A global view and frequency of occurrence of warm absorbers

Sibasish Laha, Matteo Guainazzi, Gulab C. Dewangan +2

We present results from a homogeneous analysis of the broadband 0.3-10 keV CCD resolution as well as of soft X-ray high-resolution grating spectra of a hard X-ray flux-limited samp…

astro-ph.HE2014★ 36 cited

HESS J1640-465 - an exceptionally luminous TeV gamma-ray supernova remnant

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +218

The results of follow-up observations of the TeV gamma-ray source HESSJ 1640-465 from 2004 to 2011 with the High Energy Stereoscopic System (H.E.S.S.) are reported in this work. Th…

astro-ph.HE2014★ 2 cited

Relativistic shock acceleration and some consequences

M. Lemoine, G. Pelletier

This paper summarizes recent progresses in our theoretical understanding of particle acceleration at relativistic shock waves and it discusses two salient consequences: (1) the max…

astro-ph.HE2014★ 1 cited

Collisionless Relativistic Shocks:current driven turbulence and particle acceleration

Guy Pelletier, Martin Lemoine, Laurent Gremillet +1

The physics of collisionless relativistic shocks with a moderate magnetization is presented. Micro-physics is relevant to explain the most energetic radiative phenomena of Nature,…

astro-ph.HE2014★ 20 cited

Current-driven filamentation upstream of magnetized relativistic collisionless shocks

M. Lemoine, G. Pelletier, L. Gremillet +1

The physics of instabilities in the precursor of relativistic collisionless shocks is of broad importance in high energy astrophysics, because these instabilities build up the shoc…

astro-ph.HE2014★ 63 cited

Search for Extended γ-ray Emission around AGN with H.E.S.S. and Fermi-LAT