Results 41 to 50 of about 139,946 (272)

Drop in the Hard Pulsed Fraction and a Candidate Cyclotron Line in IGR J16320–4751 Seen by NuSTAR

The Astrophysical Journal, 2023
We report on a timing and spectral analysis of a 50 ks NuSTAR observation of IGR J16320−4751 (= AX J1631.9−4752), a high-mass X-ray binary hosting a slowly rotating neutron star.
A. Bodaghee, J.-L. Chiu, J. A. Tomsick, V. Bhalerao, E. Bottacini, M. Clavel, C. Cox, F. Fürst, M. J. Middleton, F. Rahoui, J. Rodriguez, P. Romano, J. Wilms   +12 more
doaj   +1 more source

Nature of the Extreme Ultraluminous X-ray Sources [PDF]

, 2015
In this proof-of-concept study we demonstrate that in a binary system mass can be transferred toward an accreting compact object at extremely high rate. If the transferred mass is efficiently converted to X-ray luminosity (with disregard of the classical
Belczynski, Krzysztof, Sadowski, Aleksander, Sobolewska, Malgorzata, Wiktorowicz, Grzegorz   +3 more
core   +2 more sources

Formation of wind-fed black hole high-mass X-ray binaries: The role of Roche-lobe-overflow post black hole formation [PDF]

Astronomy & Astrophysics
The three dynamically confirmed wind-fed black hole high-mass X-ray binaries (BH-HMXBs) are suggested to all contain a highly spinning black hole (BH).
Zepei Xing, T. Fragos, E. Zapartas, T. Kwan, Lixin Dai, I. Mandel, M. Kruckow, M. Briel, J. Andrews, S. Bavera, S. Gossage, K. Kovlakas, K. A. Rocha, Meng-jun Sun, Philipp M. Srivastava   +14 more
semanticscholar   +1 more source

Near-infrared spectroscopy of 20 new Chandra sources in the Norma Arm

, 2014
We report on CTIO/NEWFIRM and CTIO/OSIRIS photometric and spectroscopic observations of 20 new X-ray (0.5-10 keV) emitters discovered in the Norma Arm Region Chandra Survey (NARCS).
Bauer, Franz E., Bodaghee, Arash, Fornasini, Francesca M., Rahoui, Farid, Tomsick, John A.   +4 more
core   +1 more source

Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. I. The nature of the companion star [PDF]

, 2008
Context: The INTEGRAL hard X-ray observatory has revealed an emerging population of highly obscured X-ray binary systems through multi-wavelength observations.
Bird, Bird, Bodaghee, Bodaghee, Bohlin, Bronfman, C. Foellmi, Capitanio, Cardelli, Caron, Chaty, Chernyakova, Corbet, Corbet, Corbet, Corbet, Dean, Dickey, F. Rahoui, Filliatre, Hannikainen, Hannikainen, Hanson, Hill, in 't Zand, J. A. Tomsick, J. Rodriguez, Kennea, Kouveliotou, Kuulkers, Landolt, Lebrun, Levine, Liu, Liu, Lutovinov, Lutovinov, Lutovinov, Malizia, Malizia, Malizia, Markwardt, Masetti, Molkov, Munari, Munari, Negueruela, Negueruela, Nespoli, Patel, Pellizza, Persson, Predehl, R. Walter, Rahoui, Revnivtsev, Revnivtsev, Revnivtsev, Rodriguez, Rodriguez, Rodriguez, Rupen, Russeil, S. Chaty, Sguera, Sguera, Sguera, Smith, Smith, Stephen, Sunyaev, Swank, Thompson, Thompson, Tomsick, Tomsick, Tomsick, Türler, Walter, Walter, Zurita Heras   +80 more
core   +5 more sources

Neutron Stars in X-ray Binaries and their Environments

, 2017
Neutron stars in X-ray binary systems are fascinating objects that display a wide range of timing and spectral phenomena in the X-rays. Not only parameters of the neutron stars, like magnetic field strength and spin period evolve in their active binary ...
Paul, Biswajit
core   +1 more source

Formation of Sco X-1 induced by anomalous magnetic braking of Ap/Bp stars

, 2017
Sco X-1 is the brightest persistent X-ray in the sky. It is generally believed that Sco X-1 is a low-mass X-ray binary containing a neutron star accreting from a low-mass donor star where mass transfer is driven by the magnetic braking. However, the mass
Chen, Wen-Cong
core   +1 more source

The origin of Scorpius X-1 [PDF]

, 2003
We have used multi-wavelength observations of high precision to derive the space velocity and compute the orbit around the Galactic Centre of the prototype X-ray binary Scorpius X-1. An origin in the local spiral arm of the Milky Way is ruled out.
Mirabel, I. Felix, Rodrigues, Irapuan
core   +3 more sources

Three New Galactic Center X-ray Sources Identified with Near-Infrared Spectroscopy

, 2013
We have conducted a near-infrared spectroscopic survey of 47 candidate counterparts to X-ray sources discovered by the Chandra X-ray Observatory near the Galactic Center (GC).
Bandyopadhyay, Reba M., Bauer, Franz E., Blum, Robert, DeWitt, Curtis, Eikenberry, Stephen S., Olsen, Knut, Sarajedini, Ata, Sellgren, Kris   +7 more
core   +1 more source

An Overabundance of Transient X-ray Binaries within 1 pc of the Galactic Center

, 2004
During five years of Chandra observations, we have identified seven X-ray transients located within 23 pc of Sgr A*. These sources each vary in luminosity by more than a factor of 10, and have peak X-ray luminosities greater than 5e33 erg/s, which ...
A. Ghez, E. Pfahl, F. K. Baganoff, J. Lu, King A. R., Lee H. M., M. P. Muno, M. R. Morris, Verbunt F., W. N. Brandt, Wegner W.   +10 more
core   +1 more source