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39 papers · 2 filters
Comments on the manuscript: ``The weak absorbing outflow in AGN Mrk 279: evidence of super-solar metal abundances'' astro-ph/0611578 by Fields et al
Nahum Arav, Jelle Kaastra, Elisa Costantini
A recent manuscript posted on astro-ph (astro-ph/0611578) by Fields et al. (hereafter F06) reports evidence of supersolar metal abundances in Mrk 279 by analyzing its Chandra LETGS…
XMM-Newton observations of HESS J1813-178 reveal a composite Supernova remnant
S. Funk, J. A. Hinton, Y. Moriguchi +10
We present X-ray and 12CO(J=1-0) observations of the very-high-energy (VHE) gamma-ray source HESS J1813-178 with the aim of understanding the origin of the gamma-ray emission. Usin…
Five years of searches for point sources of astrophysical neutrinos with the AMANDA-II neutrino telescope
A. Achterberg
We report the results of a five-year survey of the northern sky to search for point sources of high energy neutrinos. The search was performed on the data collected with the AMANDA…
Tides in asynchronous binary systems
Oswaldo Toledano, Edmundo Moreno, Gloria Koenigsberger +2
Stellar oscillations are excited in non-synchronously rotating stars in binary systems due to the tidal forces. Tangential components of the tides can drive a shear flow which beha…
On the asymptotic giant branch star origin of peculiar spinel grain OC2
M. Lugaro, A. I. Karakas, L. R. Nittler +4
Microscopic presolar grains extracted from primitive meteorites have extremely anomalous isotopic compositions revealing the stellar origin of these grains. The composition of pres…
A longer XMM-Newton look at I Zwicky 1: Variability of the X-ray continuum, absorption, and iron Kalpha line
L. C. Gallo, W. N. Brandt, E. Costantini +3
We present the second XMM-Newton observation (85 ks) of the narrow-line Seyfert 1 galaxy (NLS1) I Zw 1 and describe its mean spectral and timing characteristics. On average, I Zw 1…