Results 91 to 100 of about 83,767 (197)

X-Ray Polarimetry of the Dipping Accreting Neutron Star 4U 1624–49

The Astrophysical Journal
We present the first X-ray polarimetric study of the dipping accreting neutron star 4U 1624−49 with the Imaging X-ray Polarimetry Explorer. We report a detection of polarization in the nondip time intervals with a confidence level of 99.99%.
M. Lynne Saade, Philip Kaaret, Andrea Gnarini, Juri Poutanen, Francesco Ursini, Stefano Bianchi, Anna Bobrikova, Fabio La Monaca, Alessandro Di Marco, Fiamma Capitanio, Alexandra Veledina, Iván Agudo, Lucio A. Antonelli, Matteo Bachetti, Luca Baldini, Wayne H. Baumgartner, Ronaldo Bellazzini, Stephen D. Bongiorno, Raffaella Bonino, Alessandro Brez, Niccolò Bucciantini, Simone Castellano, Elisabetta Cavazzuti, Chien-Ting Chen, Stefano Ciprini, Enrico Costa, Alessandra De Rosa, Ettore Del Monte, Laura Di Gesu, Niccolò Di Lalla, Immacolata Donnarumma, Victor Doroshenko, Michal Dovčiak, Steven R. Ehlert, Teruaki Enoto, Yuri Evangelista, Sergio Fabiani, Riccardo Ferrazzoli, Javier A. García, Shuichi Gunji, Kiyoshi Hayashida, Jeremy Heyl, 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, Fabio Muleri, Michela Negro, Chi-Yung Ng, Stephen L. O’Dell, Nicola Omodei, Chiara Oppedisano, Alessandro Papitto, George G. Pavlov, Abel L. Peirson, Matteo Perri, Melissa Pesce-Rollins, Pierre-Olivier Petrucci, Maura Pilia, Andrea Possenti, Simonetta Puccetti, Brian D. Ramsey, John Rankin, Ajay Ratheesh, Oliver J. Roberts, Roger W. Romani, Carmelo Sgrò, Patrick Slane, Paolo Soffitta, 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, Martin C. Weisskopf, Kinwah Wu, Fei Xie, Silvia Zane   +100 more
doaj   +1 more source

Long-term Evolution of Sco X-1: Implications for the Current Spin Frequency and Ellipticity of the Neutron Star

The Astrophysical Journal
Sco X-1 is the brightest observed extrasolar X-ray source, which is a neutron star (NS) low-mass X-ray binary (LMXB) and is thought to have a strong potential for continuous gravitational waves (CW) detection due to its high accretion rate and relative ...
Abhijnan Kar, Pulkit Ojha, Sudip Bhattacharyya   +2 more
doaj   +1 more source

Highly Polarized Intrinsic Emission and Its Orthogonal Counterpart in Vela X-1

The Astrophysical Journal
Vela X-1 is one of the most archetypal wind-fed X-ray pulsars (XRPs), and the emergence of its orthogonal polarization states reveals distinctive polarimetric properties.
WanYun Wu, Fei Xie, Long Ji, MingYu Ge, Fabio La Monaca   +4 more
doaj   +1 more source

On X‐Ray Variability in Active Binary Stars [PDF]

, 1999
V. Kashyap, J. J. Drake
openalex   +1 more source

Quasiperiodic Oscillations in a Highly Magnetized Ultracompact X-Ray Binary 4U 1626-67

The Astrophysical Journal
We report the detection of mHz quasiperiodic oscillations (QPOs) in four Nuclear Spectroscopic Telescope Array observations of 4U 1626–67 during its recent spin-down episode.
Zi-Yi Zhou, Long Ji, Ling- Da Kong, Sergey S. Tsygankov, Qing-Cang Shui, Lian Tao   +5 more
doaj   +1 more source

Eclipsing Millisecond Pulsars with He Star Companions

The Astrophysical Journal
Eclipsing millisecond pulsars (MSPs) are a type of pulsar binaries with close orbits (≲1.0 day). They are important objects for studying the accretion history of neutron stars (NSs), pulsar winds, and the origin of isolated MSPs, etc.
Yunlang Guo, Bo Wang, Xiangdong Li, Dongdong Liu, Wenshi Tang   +4 more
doaj   +1 more source

Studies and observations of ultraviolet and X-ray sources [PDF]

The status of research undertaken with the IUE satellite for programs on strong binary X-ray stars and X-ray globular clusters is summarized.
Fabbiano, G., Geller, M., Gursky, H.
core   +1 more source

Constraining the mass and moment of inertia of neutron stars from quasi-periodic oscillations in X-ray binaries [PDF]

, 2010
J. Pétri
openalex   +1 more source

Bounds on Compactness for Low‐Mass X‐Ray Binary Neutron Stars from X‐Ray Burst Oscillations [PDF]

, 2002
Nitya R. Nath, Tod E. Strohmayer, Jean H. Swank, Nitya R. Nath, Tod E. Strohmayer, Jean H. Swank   +5 more
openalex   +1 more source

A study of accretion discs around rapidly rotating neutron stars in general relativity and its applications to four low mass X–ray binaries [PDF]

, 2002
Sudip Bhattacharyya, Sudip Bhattacharyya
openalex   +1 more source