Results 61 to 70 of about 77,058 (202)

Magnetic Fields, Relativistic Particles, and Shock Waves in Cluster Outskirts

, 2011
It is only now, with low-frequency radio telescopes, long exposures with high-resolution X-ray satellites and gamma-ray telescopes, that we are beginning to learn about the physics in the periphery of galaxy clusters.
A. Achterberg, A. Bonafede, A. Cattaneo, A. Finoguenov, A. Lazarian, A. Simionescu, A. Simionescu, A. Spitkovsky, A. Vikhlinin, A. Vikhlinin, A. Vladimirov, A.A. Schekochihin, A.E. Vladimirov, A.M. Bykov, A.M. Bykov, A.M. Bykov, A.M. Bykov, A.M. Bykov, A.R. Bell, A.R. Bell, A.R. Bell, A.R. Bell, Andrei Bykov, C. Ferrari, C. Pfrommer, C. Vogt, C.A. Norman, C.E. Rakowski, D. Nagai, D. Ryu, D. Ryu, D.C. Ellison, D.C. Fox, Dongsu Ryu, E. Amato, E. Belsole, E. Churazov, E.T. Million, F. Aharonian, F. Durret, F. Govoni, F. Miniati, F. Miniati, F. Vazza, F. Vazza, F. Vazza, F.C. Jones, G. Brunetti, G. Brunetti, G. Giovannini, G. Giovannini, G.F. Krymskii, G.W. Pratt, G.W. Pratt, H. Böhringer, H. Kang, H. Kang, H. Kang, H. Kang, H. Kang, H. Kang, H. Röttgering, H.J.A. Röttgering, H.J.A. Röttgering, H.R. Russell, Huub Röttgering, J. Bagchi, J. Niemiec, J.C. Kempner, J.S. Sanders, K. Dolag, K. Roettiger, K. Wong, L. Feretti, L. Sironi, L.D. Shaw, L.O. Drury, M. Ackermann, M. Ajello, M. Brüggen, M. Hoeft, M. Hoeft, M. Lueker, M. Markevitch, M. Markevitch, M. Markevitch, M. Markevitch, M.A. Malkov, M.R. George, M.S. Owers, M.V. Medvedev, M.W. Bautz, Marcus Brüggen, N. Battaglia, R. Blandford, R. Mewe, R.A. Krivonos, R.D. Blandford, R.J. van Weeren, R.J. van Weeren, R.J. van Weeren, R.J. van Weeren, R.M. Kulsrud, S. Borgani, S. Borgani, S. Ettori, S. Gabici, S. Giacintucci, S. Paul, S. Rosswog, S.J. Schwartz, S.M. Molnar, S.R. Furlanetto, S.W. Skillman, T. Venturi, T.H. Reiprich, U. Keshet, U. Keshet, V. Petrosian, V. Petrosian, V.N. Zirakashvili, W.I. Axford, Y. Rephaeli, Y.B. Zeldovich   +123 more
core   +1 more source

Secondary Photons from High-energy Protons Accelerated in Hypernovae

, 2008
Recent observations show that hypernovae may deposit some fraction of their kinetic energy in mildly relativistic ejecta. In the dissipation process of such ejecta in a stellar wind, cosmic ray protons can be accelerated up to $\sim 10^{19}$ eV.
Asano, Asano, Asano, Budnik, Hillas, Katsuaki Asano, Katz, Murase, Nomoto, Peter Mészáros, Razzaque, Wang   +11 more
core   +1 more source

Charge-exchange emission in the starburst galaxies M82 and NGC3256 [PDF]

, 2012
Charge-exchange (CE) emission produces features which are detectable with the current X-ray instrumentation in the brightest near galaxies. We describe these aspects in the observed X-ray spectra of the star forming galaxies M82 and NGC 3256, from the ...
Alton, Beiersdorfer, Branduardi-Raymont, Chamberlain, Cravens, Dennerl, Djurić, Engelbracht, Freedman, Grevesse, Griffiths, Heckman, Kaneda, Kelley, Lallement, Lehnert, Lira, Liu, Mewe, Norris, Origlia, Ranalli, Ranalli, Raymond, Read, Rieke, Seaquist, Smith, Strickland, Tsuru   +29 more
core   +1 more source

Glancing incidence telescopes for space astronomy [PDF]

Design optimization is reported for glancing telescopes of increased collecting areas. Considered are nested geometries for X-ray and extreme ultraviolet telescopes, each of which generates only one singular principal surface.
Mangus, J. D.
core   +1 more source

The Telescope Calibration of the Imaging X-Ray Polarimetry Explorer

The Astronomical Journal
Fifty years after the very first sounding rocket measurement of cosmic X-ray polarization, the Imaging X-ray Polarimetry Explorer (IXPE) mission has effectively opened a new window into the X-ray sky.
Brian D. Ramsey, Jeffery K. Kolodziejczak, Wayne H. Baumgartner, Nicholas E. Thomas, Stephen D. Bongiorno, Philip Kaaret, Stephen L. O’Dell, Allyn Tennant, Martin C. Weisskopf, Sergio Fabiani, Fabio Muleri, Paolo Soffitta, Enrico Costa, Alessandro Di Marco, Riccardo Ferrazzoli, Fabio La Monaca, John Rankin, Ajay Ratheesh, Alessio Trois, Luca Baldini, Ronaldo Bellazzini, Alessandro Brez, Luca Latronico, Leonardo Lucchesi, Alberto Manfreda, Massimo Minuti, Leonardo Orsini, Michele Pinchera, Carmelo Sgrò, Gloria Spandre   +29 more
doaj   +1 more source

Detecting Exoplanet Transits with the Next Generation of X-Ray Telescopes

The Astronomical Journal
Detecting exoplanet transits at X-ray wavelengths would provide a window into the effects of high-energy irradiation on the upper atmospheres of planets.
Raven Cilley, George W. King, Lía Corrales   +2 more
doaj   +1 more source

Fifty Years After the Discovery of the First Stellar-Mass Black Hole: A Review of Cyg X-1

Galaxies
Around 50 years ago, the famous bet between Stephen Hawking and Kip Thorne on whether Cyg X-1 hosts a stellar-mass black hole became a well-known story in the history of black hole science.
Jiachen Jiang
doaj   +1 more source

X-ray and Optical Correlation of Type I Seyfert NGC 3516 Studied with Suzaku and Japanese Ground-Based Telescopes

, 2016
From 2013 April to 2014 April, we performed an X-ray and optical simultaneous monitoring of the type 1.5 Seyfert galaxy NGC 3516. It employed Suzaku, and 5 Japanese ground-based telescopes, the Pirka, Kiso Schmidt, Nayuta, MITSuME, and the Kanata ...
Arai, Akira, Doi, Mamoru, Fukazawa, Yasushi, Imai, Masataka, Itoh, Ryosuke, Itoh, Yoichi, Kawabata, Koji, Kawabata, Miho, Kawaguchi, Kenji, Kokubo, Mitsuru, Makishima, Kazuo, Minezaki, Takeo, Morihana, Kumiko, Moritani, Yuki, Morokuma, Tomoki, Nakao, Hikaru, Nakaoka, Tatsuya, Nakazawa, Kazuhiro, Noda, Hirofumi, Saito, Yoshihiko, Takagi, Yuhei, Takaki, Katsutoshi, Uemura, Makoto, Watanabe, Makoto, Yamada, Shin'ya, Yoshida, Michitoshi   +25 more
core   +1 more source

X-Ray Emission of Nearby Low-mass and Sunlike Stars with Directly Imageable Habitable Zones

The Astrophysical Journal Supplement Series
Stellar X-ray and UV radiation can significantly affect the survival, composition, and long-term evolution of the atmospheres of planets in or near their host star’s habitable zone (HZ).
Breanna A. Binder, Sarah Peacock, Edward W. Schwieterman, Margaret C. Turnbull, Azariel Y. Virgen, Stephen R. Kane, Alison Farrish, Katherine Garcia-Sage   +7 more
doaj   +1 more source

Clustering of X-Ray-Selected AGN

Advances in Astronomy, 2012
The study of the angular and spatial structure of the X-ray sky has been under investigation since the times of the Einstein X-ray Observatory. This topic has fascinated more than two generations of scientists and slowly unveiled an unexpected scenario ...
N. Cappelluti, V. Allevato, A. Finoguenov   +2 more
doaj   +1 more source