7 papers
A systematic study of quiescent and outburst properties of X-ray-bright young stellar objects using XMM-Newton
Koki Sakuta, Ikuyuki Mitsuishi, Seiya Sasamata +6
Young Stellar Objects (YSOs) exhibit strong X-ray emission, widely attributed to magnetic reconnection and magnetospheric accretion; however, owing primarily to limited photon stat…
XMM-Newton observations of ten high-redshift CAMIRA clusters of galaxies
Naomi Ota, Ikuyuki Mitsuishi, Nobuhiro Okabe +9
We present results from XMM-Newton observations of ten high-redshift () galaxy clusters selected from the CAMIRA catalog based on high richness (). These m…
Development of Electroformed X-ray Optics Bridging Synchrotron Technology and Space Astronomy
Ryuto Fujii, Koki Sakuta, Kazuki Ampuku +21
We have developed X-ray telescope mirrors using an original electroforming replication technique established through the fabrication of millimeter-aperture, ultra-short-focal-lengt…
X-ray emission of F-type stars and its analogy with G-type stars
Takuma Shimura, Ikuyuki Mitsuishi, Masanobu Kunitomo +3
We conducted a systematic spectral study for single F-type main-sequence (MS) stars without significant X-ray outbursts to investigate X-ray spectral properties such as temperature…
AGN properties of ~1 million member galaxies of galaxy groups and clusters at z < 1.4 based on the Subaru Hyper Suprime-Cam survey
Yoshiki Toba, Aoi Hashiguchi, Naomi Ota +17
Herein, we present the statistical properties of active galactic nuclei (AGNs) for approximately 1 million member galaxies of galaxy groups and clusters, with 0.1 cluster redsh…
Soft X-ray Energy Spectra in the Wide-Field Galactic Disk Area Revealed with HaloSat
Kazuki Ampuku, Ikuyuki Mitsuishi, Koki Sakuta +3
We analyzed data from HaloSat observations for five fields in the Galactic disk located far away from the Galactic center (135 254) to understand th…
AGN number fraction in galaxy groups and clusters at z < 1.4 from the Subaru Hyper Suprime-Cam survey
Aoi Hashiguchi, Yoshiki Toba, Naomi Ota +20
One of the key questions on active galactic nuclei (AGN) in galaxy clusters is how AGN could affect the formation and evolution of member galaxies and galaxy clusters in the histor…