Results 21 to 30 of about 73,378 (298)

A NICER Viewing Angle on the Accretion Stream of Vela X-1

The Astrophysical Journal, 2023
Vela X-1 is the archetypal eclipsing high-mass X-ray binary, composed of a neutron star (NS) accreting the B-star wind. It was observed by nearly all X-ray observatories, often multiple times, featuring a rich spectrum of variable emission lines. However,
Roi Rahin, Ehud Behar
doaj   +1 more source

Star Cluster Ecology: VII The evolution of young dense star clusters containing primordial binaries [PDF]

, 2006
We study the first 100Myr of the evolution of isolated star clusters initially containing 144179 stars, including 13107 (10%) primordial hard binaries. Our calculations include the effects of both stellar and binary evolution.
Makino, Jun, McMillan, Steve, Zwart, Simon Portegies   +2 more
core   +2 more sources

High mass X-ray binaries: Progenitors of double neutron star systems [PDF]

The Fourteenth Marcel Grossmann Meeting, 2017
6 pages, Invited review at the Fourteenth Marcel Grossmann Meeting - MG14 - University of Rome "La Sapienza" - Rome, July 12-18, 2015.
openaire   +3 more sources

Spin evolution of neutron stars in wind-fed high-mass X-ray binaries [PDF]

Publications of the Astronomical Society of Japan, 2020
Abstract The observed X-ray pulse period of OB-type high-mass X-ray binary (HMXB) pulsars is typically longer than 100 seconds. It is considered that the interaction between the strong magnetic field of a neutron star and the wind matter could cause such a long pulse period.
openaire   +2 more sources

The evolution and masses of the neutron star and donor star in the high mass X-ray binary OAO 1657-415 [PDF]

Monthly Notices of the Royal Astronomical Society, 2011
We report near-infrared radial velocity measurements of the recently identified donor star in the high mass X-ray binary system OAO 1657-415 obtained in the H band using ISAAC on the VLT. Cross-correlation methods were employed to construct a radial velocity curve with a semi-amplitude of $22.1 \pm 3.5$ km s$^{-1}$.
Mason, A. B., Clark, J. S., Norton, A. J., Crowther, P. A., Tauris, T. M., Langer, N., Negueruela, I., Roche, P.   +7 more
openaire   +7 more sources

On the binary nature of massive blue hypergiants: high-resolution X-ray spectroscopy suggests that Cyg OB2 12 is a colliding wind binary [PDF]

, 2017
The blue hypergiant Cyg OB2-12 (B3Ia+) is a representative member of the class of very massive stars in a poorly understood evolutionary stage. We obtained its high-resolution X-ray spectrum using Chandra observatory.
Hainich, R., Hamann, Wolf-Rainer, Huenemoerder, David P., Ignace, Richard, Oskinova, Lidia M., Sander, A. A.C., Shenar, Tomer, Todt, H.   +7 more
core   +3 more sources

The VLT-FLAMES Tarantula survey XX. The nature of the X-ray bright emission-line star VFTS 399 [PDF]

, 2015
Context. The stellar population of the 30 Doradus star-forming region in the Large Magellanic Cloud contains a subset of apparently single, rapidly rotating O-type stars.
A. J. Bird, Antoniadis, Berghoefer, Bird, Blaauw, Blay, Bonanos, Brott, C. J. Evans, Cantiello, Casares, Cheng, Cioni, Clark, Clark, Clark, Clark, Clark, Clark, Corbet, Corbet, Corcoran, Crampton, de Mink, Dougherty, Dufton, E. S. Bartlett, Eldridge, Evans, F. R. N. Schneider, Farrell, Galache, Gibson, González-Galán, Grebel, H. Sana, Haberl, Haberl, I. Soszyński, J. Maíz Apellániz, J. S. Clark, Kato, Knigge, Köhler, L. K. Townsley, Langer, Lanz, Li, Lomb, Marshall, Martins, Martins, Maíz Apellániz, Maíz Apellániz, McBride, Meixner, Mennickent, Mineo, N. Langer, N. R. Walborn, Nazé, Negueruela, Negueruela, Negueruela, Negueruela, Okazaki, P. L. Dufton, P. S. Broos, Petrovic, Pfahl, Podsiadlowski, Popov, Press, Puls, Ramírez-Agudelo, Rauw, Reig, Reig, Reig, Ribó, Riquelme, S. E. de Mink, Sabbi, Salpeter, Sana, Sana, Scargle, Schneider, Schneider, Shakura, Shtykovskiy, Skrutskie, Smith, Stella, Tarasov, Townsend, Townsley, Townsley, Udalski, Vasilopoulos, W. D. Taylor, Walborn, Walborn, Walborn, Wellstein   +104 more
core   +13 more sources

Neutron star masses from hydrodynamical effects in obscured supergiant high mass X-ray binaries [PDF]

Astronomy & Astrophysics, 2012
Context. A population of obscured supergiant high mass X-ray binaries has been discovered by INTEGRAL. X-ray wind tomography of IGR J17252-3616 inferred a slow wind velocity to account for the enhanced obscuration. Aims. The main goal of this study is to understand under which conditions high obscuration could occur. Methods.
A. Manousakis, R. Walter, J. M. Blondin
openaire   +1 more source

The high energy X-ray probe (HEX-P): a new window into neutron star accretion

Frontiers in Astronomy and Space Sciences, 2023
Accreting neutron stars (NSs) represent a unique laboratory for probing the physics of accretion in the presence of strong magnetic fields (B ≳ 108 G).
R. M. Ludlam, C. Malacaria, E. Sokolova-Lapa, F. Fuerst, P. Pradhan, A. W. Shaw, K. Pottschmidt, K. Pottschmidt, S. Pike, G. Vasilopoulos, J. Wilms, J. A. García, J. A. García, K. Madsen, D. Stern, C. Maitra, M. Del Santo, D. J. Walton, M. C. Brumback, J. van den Eijnden   +19 more
doaj   +1 more source

Origin of young accreting neutron stars in high-mass X-ray binaries in supernova remnants [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT Recently, several accreting neutron stars (NSs) in X-ray binary systems inside supernova remnants have been discovered. They represent a puzzle for the standard magnetorotational evolution of NSs, as their ages (≲105 yr) are much shorter than the expected duration of Ejector and Propeller stages preceding the onset of wind ...
A D Khokhriakova, S B Popov
openaire   +2 more sources