output
20022015
most citedSpectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes

596 citations

Showing astro-ph.HEShow all

14 papers · 1 filter

astro-ph.HE201434 cited

The mystery of spectral breaks: Lyman continuum absorption by photon-photon pair production in the Fermi GeV spectra of bright blazars

Boris E. Stern, Juri Poutanen

We reanalyze Fermi/LAT gamma-ray spectra of bright blazars with a higher photon statistics than in previous works and with new Pass 7 data representation. In the spectra of the bri…

astro-ph.HE20145 cited

MAGIC search for VHE -ray emission from AE Aquarii in a multiwavelength context

J. Aleksić, S. Ansoldi, L. A. Antonelli +152

It has been claimed that the nova-like cataclysmic variable (CV) AE Aquarii (AE Aqr) is a very-high-energy (VHE, 100 GeV) source both on observational and theoretical grounds.…

astro-ph.HE2012136 cited

Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A

S. A. Grebenev, A. A. Lutovinov, S. S. Tsygankov +1

It is assumed that the radioactive decay of Ti-44 powers the infrared, optical and UV emission of supernova remnants after the complete decay of Co-56 and Co-57 (the isotopes that…

astro-ph.HE2012

Black hole binary OJ287 as a testing platform for general relativity

M. J. Valtonen, A. Gopakumar, S. Mikkola +2

The blazar OJ287 is the most promising (and the only) case for an extragalactic binary black hole system inspiralling under the action of gravitational radiation reaction. At prese…

astro-ph.HE201265 cited

Multi-wavelength observations of blazar AO 0235+164 in the 2008-2009 flaring state

M. Ackermann, M. Ajello, J. Ballet +208

The blazar AO 0235+164 (z = 0.94) has been one of the most active objects observed by Fermi Large Area Telescope (LAT) since its launch in Summer 2008. In addition to the continuou…

astro-ph.HE201242 cited

MAGIC observations of the giant radio galaxy M87 in a low-emission state between 2005 and 2007

MAGIC Collaboration, J. Aleksić, E. A. Alvarez +155

We present the results of a long M87 monitoring campaign in very high energy -rays with the MAGIC-I Cherenkov telescope. We aim to model the persistent non-thermal jet emission…