Zobrazeno 1 - 10
of 932
pro vyhledávání: '"Katsuda S"'
We report on robust measurements of elemental abundances of the Type IIn supernova SN 1978K, based on the high-resolution X-ray spectrum obtained with the Reflection Grating Spectrometer (RGS) onboard XMM-Newton. The RGS clearly resolves a number of
Externí odkaz:
http://arxiv.org/abs/2001.01975
Charge exchange (CX) is an important process in shock physics since it indicates an interaction between downstream ions and ambient neutral hydrogen, suggesting a presence of a collisionless shock. We present a high-resolution spectroscopy of an X-ra
Externí odkaz:
http://arxiv.org/abs/1812.06616
Publikováno v:
Phys. Rev. Lett. 120, 251101 (2018)
We present an interpretation of the time variability of the $X$-ray flux recently reported from a multi-epoch campaign of $15$ years observations of the supernova remnant Cassiopeia A by {\it Chandra}. We show for the first time quantitatively that t
Externí odkaz:
http://arxiv.org/abs/1805.05951
Autor:
Terada, Y., Maeda, K., Fukazawa, Y., Bamba, A., Ueda, Y., Katsuda, S., Enoto, T., Takahashi, T., Tamagawa, T., Roepke, F. K., Summa, A., Diehl, R.
The hard X-ray detector (HXD) onboard {\it Suzaku} measured soft $\gamma$-rays from the Type Ia supernova SN2014J at $77\pm2$ days after the explosion. Although the confidence level of the signal is about 90\% (i.e., $2 \sigma$), the $3 \sigma$ upper
Externí odkaz:
http://arxiv.org/abs/1603.00603
We report on a second epoch of Chandra X-ray imaging spectroscopy of the spatially-resolved old nova remnant GK Persei. An ACIS-S3 observation of 97.4 ks was conducted in November 2013 after a lapse of 13.8 years from the last visit in 2000. The X-ra
Externí odkaz:
http://arxiv.org/abs/1503.03181
Autor:
Smith, R. K., Odaka, H., Audard, M., Brown, G. V., Eckart, M. E., Ezoe, Y., Foster, A., Galeazzi, M., Hamaguchi, K., Ishibashi, K., Ishikawa, K., Kaastra, J., Katsuda, S., Leutenegger, M., Miller, E., Mitsuishi, I., Nakajima, H., Ogawa, T., Paerels, F., Porter, F. S., Sakai, K., Sawada, M., Takei, Y., Tanaka, Y., Tsuboi, Y., Uchida, H., Ursino, E., Watanabe, S., Yamaguchi, H., Yamasaki, N.
This white paper addresses selected new (to X-ray astronomy) physics and data analysis issues that will impact ASTRO-H SWG observations as a result of its high-spectral-resolution X-ray microcalorimeter, the focussing hard X-ray optics and correspond
Externí odkaz:
http://arxiv.org/abs/1412.1172
Autor:
Long, K. S., Bamba, A., Aharonian, F., Foster, A., Funk, S., Hiraga, J., Hughes, J., Ishida, M., Katsuda, S., Matsumoto, H., Mori, K., Nakajima, H., Nakamori, T., Ozaki, M., Safi-Harb, S., Sawada, M., Tamagawa, T., Tamura, K., Tanaka, T., Tsunemi, H., Uchida, H., Uchiyama, Y., Yamauchi, S.
Most supernova remnants (SNRs) are old, in the sense that their structure has been profoundly modified by their interaction with the surrounding interstellar medium (ISM). Old SNRs are very heterogenous in terms of their appearance, reflecting differ
Externí odkaz:
http://arxiv.org/abs/1412.1166
Autor:
Hughes, J. P., Safi-Harb, S., Bamba, A., Katsuda, S., Leutenegger, M., Long, K. S., Maeda, Y., Mori, K., Nakajima, H., Sawada, M., Tanaka, T., Uchida, H., Yamaguchi, H., Aharonian, F., Funk, S., Hiraga, J., Ishida, M., Koyama, K., Matsumoto, H., Nobukawa, M., Ozaki, M., Tamagawa, T., Tsunemi, H., Tomida, H., Uchiyama, Y., Uno, S.
Thanks to the unprecedented spectral resolution and sensitivity of the Soft X-ray Spectrometer (SXS) to soft thermal X-ray emission, ASTRO-H will open a new discovery window for understanding young, ejecta-dominated, supernova remnants (SNRs). In par
Externí odkaz:
http://arxiv.org/abs/1412.1169
Autor:
Uchida, H., Tsunemi, H., Tominaga, N., Katsuda, S., Kimura, M., Kosugi, H., Takahashi, H., Takakura, S.
Publikováno v:
Uchida, H. et al. 2011, PASJ, 63, 199
We observed the Cygnus Loop with XMM-Newton (9 pointings) and Suzaku (32 pointings) between 2002 and 2008. The total effective exposure time is 670.2 ks. By using all of the available data, we intended to improve a signal-to-noise ratio of the spectr
Externí odkaz:
http://arxiv.org/abs/1102.1495
Autor:
Katsuda, S., Mori, K., Tsunemi, H., Park, S., Hwang, U., Burrows, D. N., Hughes, J. P., Slane, P. O.
Publikováno v:
Astrophys.J.678:297-302,2008
We report on the discovery of fast-moving X-ray--emitting ejecta knots in the Galactic Oxygen-rich supernova remnant Puppis A from XMM-Newton observations. We find an X-ray knotty feature positionally coincident with an O-rich fast-moving optical fil
Externí odkaz:
http://arxiv.org/abs/0805.1369