Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Zorawar Wadiasingh"'
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Time-domain and multimessenger astronomy (TDAMM) involves the study of transient and time-variable phenomena across various wavelengths and messengers. The Astro2020 Decadal Survey has identified TDAMM as the top priority for NASA in this decade, emp
Externí odkaz:
https://doaj.org/article/676a032c4f6d442da6a5398f89cc38c5
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 109 (2024)
We investigated the multiband emission from the pulsar binaries XSS J12270−4859, PSR J2039−5617, and PSR J2339−0533, which exhibit orbital modulation in the X-ray and gamma-ray bands. We constructed the sources’ broadband spectral energy dist
Externí odkaz:
https://doaj.org/article/8fa0b47a9f374373a772677576a1561d
Autor:
Fei Xie, Josephine Wong, Fabio La Monaca, Roger W. Romani, Jeremy Heyl, Philip Kaaret, Alessandro Di Marco, Niccolò Bucciantini, Kuan Liu, Chi-Yung Ng, Niccolò Di Lalla, Martin C. Weisskopf, Enrico Costa, Paolo Soffitta, Fabio Muleri, Matteo Bachetti, Maura Pilia, John Rankin, Sergio Fabiani, Iván Agudo, Lucio A. Antonelli, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stefano Bianchi, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Fiamma Capitanio, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Riccardo Ferrazzoli, Javier A. Garcia, Shuichi Gunji, Kiyoshi Hayashida, Wataru Iwakiri, Svetlana G. Jorstad, Vladimir Karas, Fabian Kislat, Takao Kitaguchi, Jeffery J. Kolodziejczak, Henric Krawczynski, Luca Latronico, Ioannis Liodakis, Simone Maldera, Alberto Manfreda, Frédéric Marin, Andrea Marinucci, Alan P. Marscher, Herman L. Marshall, Francesco Massaro, Giorgio Matt, Ikuyuki Mitsuishi, Tsunefumi Mizuno, Michela Negro, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Andrea Possenti, Juri Poutanen, Simonetta Puccetti, Brian D. Ramsey, Ajay Ratheesh, Oliver J. Roberts, Carmelo Sgrò, Patrick Slane, Gloria Spandre, Douglas A. Swartz, Toru Tamagawa, Fabrizio Tavecchio, Roberto Taverna, Yuzuru Tawara, Allyn F. Tennant, Nicholas E. Thomas, Francesco Tombesi, Alessio Trois, Sergey S. Tsygankov, Roberto Turolla, Jacco Vink, Kinwah Wu, Silvia Zane, IXPE Collaboration, Zorawar Wadiasingh, Wynn C. G. Ho, Alice K. Harding, Keith C. Gendreau, Zaven Arzoumanian
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 92 (2024)
We report on X-ray polarization measurements of the extragalactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud, using a ∼850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IX
Externí odkaz:
https://doaj.org/article/b687c76c03d2480db0b87df28a1b8fee
Autor:
Serena Vinciguerra, Tuomo Salmi, Anna L. Watts, Devarshi Choudhury, Thomas E. Riley, Paul S. Ray, Slavko Bogdanov, Yves Kini, Sebastien Guillot, Deepto Chakrabarty, Wynn C. G. Ho, Daniela Huppenkothen, Sharon M. Morsink, Zorawar Wadiasingh, Michael T. Wolff
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 62 (2024)
In 2019 the NICER collaboration published the first mass and radius inferred for PSR J0030+0451, thanks to NICER observations, and consequent constraints on the equation of state characterizing dense matter. Two independent analyses found a mass of
Externí odkaz:
https://doaj.org/article/93077cc3ddcb42978730e1aa2cfe7f8b
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 204 (2023)
We develop kinetic plasma models of pulsar magnetospheres with magnetic-field-line-dependent plasma injection that reveal the importance of various magnetosphere regions in regulating the γ -ray emission. We set different particle injection rates fo
Externí odkaz:
https://doaj.org/article/f000561f359a404fa3c3aee955e58b1e
Autor:
Hiroki Yoneda, Valenti Bosch-Ramon, Teruaki Enoto, Dmitry Khangulyan, Paul S. Ray, Tod Strohmayer, Toru Tamagawa, Zorawar Wadiasingh
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 77 (2023)
Gamma-ray binary systems, a subclass of high-mass X-ray binaries, show nonthermal emissions from radio to TeV. While efficient electron acceleration is considered to take place in them, the nature of the acceleration mechanism and the physical enviro
Externí odkaz:
https://doaj.org/article/d1e3a5eb3e664ce48fea015f8d13972c
Autor:
Marcus E. Lower, George Younes, Paul Scholz, Fernando Camilo, Liam Dunn, Simon Johnston, Teruaki Enoto, John M. Sarkissian, John E. Reynolds, David M. Palmer, Zaven Arzoumanian, Matthew G. Baring, Keith Gendreau, Ersin Göğüş, Sebastien Guillot, Alexander J. van der Horst, Chin-Ping Hu, Chryssa Kouveliotou, Lin Lin, Christian Malacaria, Rachael Stewart, Zorawar Wadiasingh
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 153 (2023)
We report the radio and high-energy properties of a new outburst from the radio-loud magnetar 1E 1547.0−5408. Following the detection of a short burst from the source with Swift-BAT on 2022 April 7, observations by NICER detected an increased flux
Externí odkaz:
https://doaj.org/article/39e67f515aba4874b94b2f1cf40c8f07
Autor:
Tuomo Salmi, Serena Vinciguerra, Devarshi Choudhury, Thomas E. Riley, Anna L. Watts, Ronald A. Remillard, Paul S. Ray, Slavko Bogdanov, Sebastien Guillot, Zaven Arzoumanian, Cecilia Chirenti, Alexander J. Dittmann, Keith C. Gendreau, Wynn C. G. Ho, M. Coleman Miller, Sharon M. Morsink, Zorawar Wadiasingh, Michael T. Wolff
Publikováno v:
The Astrophysical Journal, Vol 941, Iss 2, p 150 (2022)
We report a revised analysis for the radius, mass, and hot surface regions of the massive millisecond pulsar PSR J0740+6620, studied previously with joint fits to NICER and XMM-Newton data by Riley et al. (2021) and Miller et al. (2021). We perform a
Externí odkaz:
https://doaj.org/article/074d00f700e34a1980dcf32162165168
Autor:
Hiroki Yoneda, Valenti Bosch-Ramon, Teruaki Enoto, Dmitry Khangulyan, Paul S. Ray, Tod Strohmayer, Toru Tamagawa, Zorawar Wadiasingh
Gamma-ray binary systems, a subclass of high-mass X-ray binaries, show non-thermal emissions from radio to TeV. While efficient electron acceleration is considered to take place in them, the nature of the acceleration mechanism and the physical envir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cea45972b88b5f44f1f62eb4725b54c
http://arxiv.org/abs/2303.12587
http://arxiv.org/abs/2303.12587
Autor:
Louis du Plessis, Christo Venter, Zorawar Wadiasingh, Alice K Harding, David A H Buckley, Stephen B Potter, P J Meintjes
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 510:2998-3010
AR Sco is a binary system that contains a white and red dwarf. The rotation rate of the white dwarf has been observed to slow down, analogous to rotation-powered radio pulsars; it has thus been dubbed a "white dwarf pulsar". We previously fit the tra