Zobrazeno 1 - 10
of 2 708
pro vyhledávání: '"Uchida, Hiroyuki"'
Autor:
Narita, Takuto, Uchida, Hiroyuki, Vink, Jacco, Katsuda, Satoru, Umeda, Hideyuki, Yoshida, Takashi, Sato, Toshiki, Matsunaga, Kai, Tsuru, Takeshi Go
Circumstellar material (CSM) produced by mass loss from massive stars ($\gtrsim10 M_{\odot}$) through strong stellar winds or binary stripping provides rich information for understanding progenitors of core-collapse supernova remnants. In this paper
Externí odkaz:
http://arxiv.org/abs/2409.17542
Autor:
Kishimoto, Takumi, Nobukawa, Kumiko K., Takeda, Ayaki, Tsuru, Takeshi G., Katsuda, Satoru, Kazuhiro, Nakazawa, Mori, Koji, Nobukawa, Masayoshi, Uchida, Hiroyuki, Kawabe, Yoshihisa, Kuwano, Satoru, Kurogi, Eisuke, Ito, Yamato, Aoki, Yuma
Measurements of the upper atmosphere at ~100 km are important to investigate climate change, space weather forecasting, and the interaction between the Sun and the Earth. Atmospheric occultations of cosmic X-ray sources are an effective technique to
Externí odkaz:
http://arxiv.org/abs/2407.18507
Autor:
Nobukawa, Kumiko K., Takeda, Ayaki, Katsuda, Satoru, Tsuru, Takeshi G., Nakazawa, Kazuhiro, Mori, Koji, Uchida, Hiroyuki, Nobukawa, Masayoshi, Kurogi, Eisuke, Kishimoto, Takumi, Matsui, Reo, Aoki, Yuma, Ito, Yamato, Kuwano, Satoru, Tanaka, Tomitaka, Uenomachi, Mizuki, Matsuda, Masamune, Yamawaki, Takaya, Kohmura, Takayoshi
The upper atmosphere at the altitude of 60-110 km, the mesosphere and lower thermosphere (MLT), has the least observational data of all atmospheres due to the difficulties of in-situ observations. Previous studies demonstrated that atmospheric occult
Externí odkaz:
http://arxiv.org/abs/2407.16922
Autor:
Mori, Koji, Tomida, Hiroshi, Nakajima, Hiroshi, Okajima, Takashi, Noda, Hirofumi, Uchida, Hiroyuki, Suzuki, Hiromasa, Kobayashi, Shogo Benjamin, Yoneyama, Tomokage, Hagino, Kouichi, Nobukawa, Kumiko, Tanaka, Takaaki, Murakami, Hiroshi, Uchiyama, Hideki, Nobukawa, Masayoshi, Matsumoto, Hironori, Tsuru, Takeshi, Yamauchi, Makoto, Hatsukade, Isamu, Odaka, Hirokazu, Kohmura, Takayoshi, Yamaoka, Kazutaka, Ishida, Manabu, Maeda, Yoshitomo, Hayashi, Takayuki, Tamura, Keisuke, Boissay-Malaquin, Rozenn, Sato, Toshiki, Yoshida, Tessei, Kanemaru, Yoshiaki, Hiraga, Junko, Dotani, Tadayasu, Ozaki, Masanobu, Tsunemi, Hiroshi, Inoue, Shun, Azuma, Ryuishi, Aoki, Yuma, Asahina, Yoh, Nakamura, Shotaro, Kamei, Takamitsu, Fukuda, Masahiro, Asakura, Kazunori, Yoshimoto, Marina, Ode, Yuichi, Hakamata, Tomohiro, Aoyagi, Mio, shima, Kohei, Ito, Yamato, Aoki, Daiki, Fujisawa, Kaito, Shimizu, Yasuyuki, Higuchi, Mayu, Miyazaki, Keitaro, Kusunoki, Kohei, Otsuka, Yoshinori, Yokosu, Haruhiko, Yonemaru, Wakana, Ichikawa, Kazuhiro, Nakano, Hanako, takemoto, Reo, Matsushima, Tsukasa, Hayashida, Kiyoshi
Xtend is one of the two telescopes onboard the X-ray imaging and spectroscopy mission (XRISM), which was launched on September 7th, 2023. Xtend comprises the Soft X-ray Imager (SXI), an X-ray CCD camera, and the X-ray Mirror Assembly (XMA), a thin-fo
Externí odkaz:
http://arxiv.org/abs/2406.19911
Autor:
Suzuki, Hiromasa, Yoneyama, Tomokage, Kobayashi, Shogo B., Noda, Hirofumi, Uchida, Hiroyuki, Nobukawa, Kumiko K., Hagino, Kouichi, Mori, Koji, Tomida, Hiroshi, Nakajima, Hiroshi, Tanaka, Takaaki, Murakami, Hiroshi, Uchiyama, Hideki, Nobukawa, Masayoshi, Kanemaru, Yoshiaki, Otsuka, Yoshinori, Yokosu, Haruhiko, Yonemaru, Wakana, Nakano, Hanako, Ichikawa, Kazuhiro, Takemoto, Reo, Matsushima, Tsukasa, Yoshimoto, Marina, Aoyagi, Mio, Shima, Kohei, Aoki, Yuma, Ito, Yamato, Fukuda, Kaito, Kiyama, Honoka, Aoki, Daiki, Fujisawa, Kaito, Shimizu, Yasuyuki, Higuchi, Mayu, Fukuda, Masahiro, Sakamoto, Natsuki, Azuma, Ryuichi, Inoue, Shun, Kohmura, Takayoshi, Yamauchi, Makoto, Hatsukade, Isamu, Matsumoto, Hironori, Odaka, Hirokazu, Mizuno, Tsunefumi, Yoshida, Tessei, Maeda, Yoshitomo, Ishida, Manabu, Tsuru, Takeshi G., Yamaoka, Kazutaka, Okajima, Takashi, Hayashi, Takayuki, Hiraga, Junko S., Ozaki, Masanobu, Dotani, Tadayasu, Tsunemi, Hiroshi, Hayashida, Kiyoshi
XRISM (X-Ray Imaging and Spectroscopy Mission) is an astronomical satellite with the capability of high-resolution spectroscopy with the X-ray microcalorimeter, Resolve, and wide field-of-view imaging with the CCD camera, Xtend. The Xtend consists of
Externí odkaz:
http://arxiv.org/abs/2406.19910
High-velocity blue-shifted Fe XXV He$\alpha$ line during a superflare of the RS CVn-type star IM Peg
Autor:
Inoue, Shun, Iwakiri, Wataru Buz, Enoto, Teruaki, Uchida, Hiroyuki, Kurihara, Miki, Tsujimoto, Masahiro, Notsu, Yuta, Hamaguchi, Kenji, Gendreau, Keith, Arzoumanian, Zaven, Tsuru, Takeshi Go
Monitor of All-sky X-ray Image (MAXI) detected a superflare, releasing $5\times 10^{37}$ erg in 2$-$10 keV, of the RS CVn-type star IM Peg at 10:41 UT on 2023 July 23 with its Gas Slit Camera (GSC; 2$-$30 keV). We conducted X-ray follow-up observatio
Externí odkaz:
http://arxiv.org/abs/2406.06940
Autor:
Matsunaga, Kai, Uchida, Hiroyuki, Enokiya, Rei, Sato, Toshiki, Sawada, Ryo, Umeda, Hideyuki, Narita, Takuto, Tsuru, Takeshi Go
It is generally hard to put robust constraints on progenitor masses of supernovae (SNe) and remnants (SNRs) observationally, while they offer tantalizing clues to understanding explosion mechanisms and mass distribution. Our recent study suggests tha
Externí odkaz:
http://arxiv.org/abs/2405.20736
Autor:
Tsuji, Naomi, Tanaka, Takaaki, Safi-Harb, Samar, Aharonian, Felix, Casanova, Sabrina, Kothes, Roland, Moulin, Emmanuel, Uchida, Hiroyuki, Uchiyama, Yasunobu
HESS J1641-463 is an unidentified gamma-ray source with a hard TeV gamma-ray spectrum, and thus it has been proposed to be a possible candidate for cosmic ray (CR) accelerators up to PeV energies (a PeVatron candidate). The source spatially coincides
Externí odkaz:
http://arxiv.org/abs/2404.11012
Autor:
Sato, Toshiki, Matsunaga, Kai, Sawada, Ryo, Takahashi, Koh, Suwa, Yudai, Hughes, John P., Uchida, Hiroyuki, Narita, Takuto, Umeda, Hideyuki
Simulations of pre-supernova evolution suggest that some intense shell burning can be so active that, in extreme cases, it can merge with the outer shell, changing the initial conditions for the supernova explosion. However, such violent activity in
Externí odkaz:
http://arxiv.org/abs/2403.04156
Autor:
Uchida, Hiroyuki, Kasuga, Tomoaki, Maeda, Keiichi, Lee, Shiu-Hang, Tanaka, Takaaki, Bamba, Aya
While various methods have been proposed to disentangle the progenitor system for Type Ia supernovae, their origin is still unclear. Circumstellar environment is a key to distinguishing between the double-degenerate (DD) and single-degenerate (SD) sc
Externí odkaz:
http://arxiv.org/abs/2401.11763