Search Publications
Discovery of Interacting Molecular Gas toward the TeV Gamma-Ray Peak of the SNR G 347.3--0.5
Takahashi, Tadayuki; Uchiyama, Yasunobu; Fukui, Yasuo +10 more
Supernova remnants ( = SNR) are suggested to be sites of cosmic-ray acceleration. In particular, it has been an issue of keen interest whether cosmic ray protons are being accelerated in a SNR which emits TeV γ-rays. A crucial observational test for this is to find dense molecular gas towards the SNR, because such molecular gas can best verify the…
Dusty ERO Search behind Two Massive Clusters
Ohyama, Youichi; Kawabata, Koji S.; Yoshida, Michitoshi +15 more
We performed deep K'-band imaging observations of 2 massive clusters, MS 0451.6 - 0305 at z = 0.55 and MS 0440.5 + 0204 at z = 0.19, for searching counterparts of the faint sub-mm sources behind these clusters, which would provide one of the deepest extremely red object (ERO) samples. Comparing our near-infrared images with optical images taken by…
Eruptive and Quasi-Eruptive Disappearing Solar Filaments and Their Relationship with Coronal Activities
Morimoto, Taro; Kurokawa, Hiroki
By measuring the 3-D velocity fields of 35 disappearing filaments (Disparition Brusques: DBs) on the solar disk, we studied the causal relationship between the motions of Hα DBs and the associated coronal phenomena. Using the derived 3-D velocity fields of the DBs, we developed a method to judge whether a DB is ejected into interplanetary space or…
The Virgo High-Resolution CO Survey: III. NGC 4254
Nakanishi, Hiroyuki; Koda, Jin; Sofue, Yoshiaki +1 more
We present high-angular-resolution (1''.5 - 5'') interferometer observations of the 12CO (J = 1--0) line emission in the central region of the SA(s)c galaxy NGC 4254 (M 99). The observations were obtained using the Nobeyama Millimeter-wave Array (NMA) during the course of a long-term CO-line survey of Virgo spirals. We present the spect…
XMM-Newton Observation of the Cluster of Galaxies Abell 1650
Yamashita, Koujun; Takahashi, Seiji
We present the nonuniform distribution of temperature and abundance in the angular extent of 10' (1.4Mpc) in A1650 observed by XMM-Newton. Spectral analysis was carried out in 19 systematically-subdivided regions, and in 15 specified regions referred to the hardness ratio (HR) map. The value of HR, defined as the ratio of counts in the 1.6-10keV b…