8 papers
TeV Gamma-Rays from Old Supernova Remnants
Ryo Yamazaki, Kazunori Kohri, Aya Bamba +3
We study the emission from an old supernova remnant (SNR) with an age of around 10^5 yrs and that from a giant molecular cloud (GMC) encountered by the SNR. When the SNR age is aro…
Galactic modulation of extragalactic cosmic rays: Possible origin of the knee in the cosmic ray spectrum
Hiroshi Muraishi, Shohei Yanagita, Tatsuo Yoshida
The existence of the spectral break around eV in the cosmic ray spectrum (referred to as the `knee') is one of the biggest questions in cosmic ray astrophys…
A Spatial and Spectral Study of Nonthermal Filaments in Historical Supernova Remnants: Observational Results with Chandra
Aya Bamba, Ryo Yamazaki, Tatsuo Yoshida +2
The outer shells of young supernova remnants (SNRs) are the most plausible acceleration sites of high-energy electrons with the diffusive shock acceleration (DSA) mechanism. We stu…
A Search for TeV Gamma-ray Emission from the PSR B1259-63/SS2883 Binary System with the CANGAROO-II 10-m Telescope
A. Kawachi, T. Naito, J. R. Patterson +2
Observations of the PSR B1259-63/SS2883 binary system using the CANGAROO-II Cherenkov telescope are reported. This nearby binary consists of a 48msec radio pulsar in a highly eccen…
Self-similar collapse with cooling and heating in an expanding universe
Shuji Uchida, Tatsuo Yoshida
We derive self-similar solutions including cooling and heating in an Einstein de-Sitter universe, and investigate the effects of cooling and heating on the gas density and temperat…
High Accretion Rate during Class 0 Phase due to External Trigger
Kazutaka Motoyama, Tatsuo Yoshida
Recent observations indicate that some class 0 sources have orders of magnitude higher accretion rates than those of class I. We investigated the conditions for the high accretion…