Search Publications
A multi-wavelength study of nuclear activity and environment of low-power radio galaxy CTD 86
Singh, K. P.; Dewangan, G. C.; Pandge, M. B. +1 more
We present an X-ray study of the nuclear and extended emission of a nearby Fanaroff & Riley class I (FR-I) radio galaxy CTD 86 based on the XMM-Newton observations. Two different components observed are: diffuse thermal emission from hot gas (kT ∼ 0.79 keV, ne ∼ 10-3 cm-3, LX ∼ 5 × 1042 er…
Erratum: "Discovery of a Giant Radio Halo in a New Planck Galaxy Cluster PLCKG171.9-40.7" (2013, ApJ, 766, 18)
Wik, Daniel R.; Giacintucci, Simona; Venturi, Tiziana +2 more
Outburst of the unknown source IGR J18175-2419 detected by the INTEGRAL observatory: Yet another fast X-ray transient?
Grebenev, S. A.
The discovery of a new X-ray source, IGR J18175-2419, that flared up for a short (∼1 h) time on September 26, 2012, by the INTEGRAL observatory is reported. The results of the source's localization and the spectral/timing analysis of its X-ray emission are presented. The source may turn out to be yet another representative of the population of fas…
X-ray properties and scaling relations for {Planck} ESZ clusters
Vikhlinin, A.; Forman, W.; Murray, S. +2 more
Clusters of galaxies were first recognized through overdensities of galaxies. With the advent of X-ray telescopes, large numbers of clusters were by found by the spatially extended nature of their X-ray emission. Today with the availability of millimeter wave telescopes capable of finding clusters through the Sunyaev-Zeldovich effect, it is possib…
The Onset of Differentiation and Internal Evolution: The Case of 21 Lutetia
Capaccioni, F.; De Sanctis, M. C.; Turrini, D. +2 more
Asteroid 21 Lutetia, seen by the Rosetta spacecraft, plays a crucial role in the reconstruction of primordial phases of planetary objects. Its high bulk density and its primitive chondritic crust suggest that Lutetia could be partially differentiated. We developed a numerical code, also used for studying the geophysical history of Vesta, to explor…
UV Radiation of the Young Sun and its Implications for Life in the Solar System
Buccino, A. P.; Mauas, P. J. D.; Hanslmeier, A. +3 more
UV radiation is thought to have played an important role in the origin of life on Earth. To estimate these levels of UV radiation, we computed the UVC fluxes from HST/STIS and IUE spectra of the young solar analogs κ^1 Cet and χ^1 Ori. In the future experiments with extremophilic microorganisms we will use these resulting UVC-levels to test the pr…
Stellar subsystems of the young tidal dwarf galaxy Ho IX
Tikhonov, N. A.; Galazutdinova, O. A.
Based on archival Hubble Space Telescope ACS/WFC images, we have performed stellar photometry for the young tidal dwarf galaxy Ho IX. We have determined that star formation in Ho IX began 110 Myr ago and ended 20 Myr ago. We have identified 20 young star clusters in the galaxy with ages from 25 to 100 Myr. For the main star-forming region of Ho IX…
Infrared composition of the Large Magellanic Cloud
Takeuchi, T. T.; Onaka, T.; Ita, Y. +3 more
The evolution of galaxies and the history of star formation in the Universe are among the most important topics in today's astrophysics. Especially, the role of small, irregular galaxies in the star-formation history of the Universe is not yet clear. Using the data from the AKARI IRC survey of the Large Magellanic Cloud at 3.2, 7, 11, 15, and 24 &…
The Impact of Suzaku Measurements on Astroparticle Physics
Ota, Naomi
Results from the Suzaku X-ray broad-band observations of clusters of galaxies are summarized. Aiming at understanding the physics of gas heating/particle acceleration and the cluster dynamical evolution, we search for non-thermal hard X-ray emission from merging clusters, particularly A2163 and the Bullet Cluster, based on the Suzaku and XMM-Newto…
Distribuciones Espectrales de Energía de las compañeras visibles en sistemas binarios que albergan agujeros negros de masas estelares
Cúneo, V. A.; Gómez, M. N.
Stellar mass black holes are mainly detected in binary systems; where the compact object accretes material from its visible compa-nion. With the objective of characterizing visible companions; we analyse the Spectral Energy Distributions (SEDs) of a sample of these objects; selected from a galactic stellar black holes catalogue built by the author…