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Neutral H density at the termination shock: a consolidation of recent results
M. Bzowski, E. Moebius, S. Tarnopolski +2
We discuss a consolidation of determinations of the density of neutral interstellar H at the nose of the termination shock carried out with the use of various data sets, techniques…
The isolated neutron star candidate 2XMM J104608.7-594306
A. M. Pires, C. Motch, R. Turolla +2
Over the last decade, X-ray observations unveiled the existence of several classes of isolated neutron stars (INSs) which are radio-quiet or exhibit radio emission with properties…
Progenitor mass of the type IIP supernova 2005cs
V. P. Utrobin, N. N. Chugai
The progenitor mass of type IIP supernova can be determined from either hydrodynamic modeling of the event or pre-explosion observations. To compare these approaches, we determine…
Large-amplitude intraday variability in QSO 1156+295 observed during a VLBI experiment
T. Savolainen, Y. Y. Kovalev
We present here the discovery of rapid, large amplitude intraday variability in the compact flat-spectrum radio quasar 1156+295. The detection of 40% flux density variations at 15…
Serendipitous VLBI detection of rapid, large-amplitude, intraday variability in QSO 1156+295
T. Savolainen, Y. Y. Kovalev
We report a serendipitous detection of rapid, large amplitude flux density variations in the highly core-dominated, flat-spectrum radio quasar 1156+295 during an observing session…
A Radio Survey of Seven Southern X-ray Luminous Clusters of Galaxies
O. B. Slee, H. Andernach, V. J. McIntyre +1
The Australia Telescope Compact Array (ATCA) has been used at 1.38 and 2.38 GHz to survey seven southern Abell clusters of galaxies with high X-ray luminosities: A2746, A2837, A312…
Stellar populations and galaxy evolution in the NGC 80 group
Olga K. Silchenko, Victor L. Afanasiev
We have studied the central parts of seven early-type galaxies -- the members of the X-ray-bright galaxy group NGC 80 -- by means of integral-field spectroscopy at the Russian 6m t…
An Extreme Solar Event of 20 January 2005: Properties of the Flare and the Origin of Energetic Particles
V. V. Grechnev, V. G. Kurt, I. M. Chertok +9
The extreme solar and SEP event of 20 January 2005 is analyzed from two perspectives. Firstly, we study features of the main phase of the flare, when the strongest emissions from m…
Quasi-simultaneous multi-frequency observations of inverted-spectrum GPS candidate sources
B. Vollmer, T. P. Krichbaum, E. Angelakis +1
Gigahertz-Peaked Spectrum (GPS) sources are probably the precursors of local radio galaxies.Existing GPS source samples are small (<200). It is necessary to extend the availabe sam…
The Early Expansion of Cluster Cores
N. Bastian, M. Gieles, S. P. Goodwin +4
The observed properties of young star clusters, such as the core radius and luminosity profile, change rapidly during the early evolution of the clusters. Here we present observati…
Low-mass X-ray binaries in the bulge of the Milky Way
M. Revnivtsev, A. Lutovinov, E. Churazov +4
We study the population of low-mass X-ray binaries (LMXBs) in the Galactic bulge using the deep survey of this region by the IBIS telescope aboard the INTEGRAL observatory. Thanks…
On the Dynamics of Proto-Neutron Star Winds and r-Process Nucleosynthesis
I. V. Panov, H. -Th. Janka
We study here the formation of heavy r-process nuclei in the high-entropy environment of rapidly expanding neutrino-driven winds from compact objects. In particular, we explore the…
Universal X-ray emissivity of the stellar population in early-type galaxies: unresolved X-ray sources in NGC 3379
M. Revnivtsev, E. Churazov, S. Sazonov +2
We use deep Chandra observations to measure the emissivity of the unresolved X-ray emission in the elliptical galaxy NGC 3379. After elimination of bright, low-mass X-ray binaries…
Hyperflares of SGRs as an engine for millisecond extragalactic radio bursts
S. B. Popov, K. A. Postnov
We propose that the strong millisecond extragalactic radio burst (mERB) discovered by Lorimer et al. (2007) may be related to a hyperflare from an extragalactic soft gamma-ray repe…
High-Mass X-ray Binaries and the Spiral Structure of the Host Galaxy
P. Shtykovskiy, M. Gilfanov
We investigate the manifestation of the spiral structure in the distribution of high-mass X-ray binaries (HMXBs) over the host galaxy. We construct the simple kinematic model. It s…
High Mass X-ray Binaries and Recent Star Formation History of the Small Magellanic Cloud
P. Shtykovskiy, M. Gilfanov
We study the relation between high-mass X-ray binary (HMXB) population and recent star formation history (SFH) for the Small Magellanic Cloud (SMC). Using archival optical SMC obse…
Ejecta and progenitor of the low-luminosity Type IIP supernova 2003Z
V. P. Utrobin, N. N. Chugai, A. Pastorello
The origin of low-luminosity Type IIP supernovae is unclear: they have been proposed to originate either from massive (about 25 Msun) or low-mass (about 9 Msun) stars. We wish to d…
Space cowboys odyssey: beyond the Gould Belt
S. B. Popov, B. Posselt, F. Haberl +3
We present our new advanced model for population synthesis of close-by cooling NSs. Detailed treatment of the initial spatial distribution of NS progenitors and a detailed ISM stru…
Confinement of Cosmic Rays in Dark Matter clumps
W. de Boer, V. Zhukov
Some part of the relic Dark Matter is distributed in small-scale clumps which survived structure formation in inflation cosmological scenario. The annihilation of DM inside these c…
Large-scale variations of the cosmic X-ray background and the X-ray emissivity of the local Universe
M. Revnivtsev, S. Molkov, S. Sazonov
We study the cosmic X-ray background (CXB) intensity variations on large angular scales using slew data of the RXTE observatory. We detect intensity variations up to ~2% on angular…
Search for X-ray bursts in the INTEGRAL/IBIS data of 2003-2005 and discovery of the new X-ray burster IGR J17364-2711/17380-3749
I. V. Chelovekov, S. A. Grebenev, R. A. Sunyaev
All the observations performed with the IBIS telescope aboard the INTEGRAL observatory during the first 2.5 years of its in-orbit operation have been analyzed to find X-ray bursts.…
IGR J17098-3628: an X-ray Nova discovered by INTEGRAL
S. A. Grebenev, S. V. Molkov, M. G. Revnivtsev +1
We report the discovery with INTEGRAL on March 24, 2005, and follow-up observations of the distant Galactic X-ray nova IGR J17098-3628.
Permafrost - An Alternative Target Material for Ultra High Energy Neutrino Detection?
R. Nahnhauer, A. A. Rostovtsev, D. Tosi
The detection of cosmic neutrinos with energies above 1017 eV got growing interest during recent years. Possible target materials for in-matter arrays of ~100 km3 size under discus…
On the nature of QPO in the tail of SGR giant flares
A. N. Timokhin, D. Eichler, Yu. Lyubarsky
A model is presented for the quasiperiodic component of magnetar emission during the tail phase of giant flares. The model invokes modulation of the particle number density in the…