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22 papers · 2 filters
Observation of PeV Gamma Rays from the Monogem Ring with the Tibet Air Shower Array
The Tibet AS Gamma Collaboration, M. Amenomori
We searched for steady PeV gamma-ray emission from the Monogem ring region with the Tibet air shower array from 1997 February to 2004 October. No evidence for statistically signifi…
L_X-T Relation and Related Properties of Galaxy Clusters
Naomi Ota, Tetsu Kitayama, Kuniaki Masai +1
An observational approach is presented to constrain the global structure and evolution of the intracluster medium based on the ROSAT and ASCA distant cluster sample. From statistic…
The ecology of star clusters and intermediate mass black holes in the Galactic bulge
Simon Portegies Zwart, Holger Baumgardt, Stephen L. W. McMillan +3
We simulate the inner 100pc of the Milky-Way Galaxy to study the formation and evolution of the population of star clusters and intermediate mass black holes. For this study we per…
Evolution of Galactic Nuclei. I. orbital evolution of IMBH
Tatsushi Matsubayashi, Junichiro Makino, Toshikazu Ebisuzaki
Resent observations and theoretical interpretations suggest that IMBHs (intermediate-mass black hole) are formed in the centers of young and compact star clusters born close to the…
Subaru optical observations of the two middle-aged pulsars PSR B0656+14 and Geminga
Yuri A. Shibanov, Sergei V. Zharikov, Viktoria N. Komarova +6
We carried out a deep subarcsecond BRI imaging of the two middle-aged pulsars to establish their properties in the optical range. Both pulsars are detected at >10 sigma level. Gemi…
An optically thick inner corona geometry for the Very High State Galactic Black Hole XTE J1550-564
Chris Done, Aya Kubota
(truncated version) The X-ray spectra of Galactic binary systems in the very high state show both strong disk emission and a strong, steep tail to high energies. We use simultaneou…