Results 21 to 30 of about 85,413 (296)

High-Mass X-Ray Binaries and OB Runaway Stars [PDF]

International Astronomical Union Colloquium, 2004
AbstractHigh-mass X-ray binaries (HMXBs) represent an important phase in the evolution of massive binary systems and provide fundamental information on the properties of the OB-star primaries and their compact secondaries (neutron star, black hole). Recent observations indicate that the neutron stars in some of these systems (Vela X-1, 4U 1700-37) are ...
Kaper, L., van der Meer, A., Tijani, A.H.   +2 more
openaire   +2 more sources

Search for intermittent X-ray pulsations from neutron stars in low-mass X-ray binaries [PDF]

Publications of the Astronomical Society of Australia, 2021
AbstractWe present the results of our extensive binary orbital motion corrected pulsation search for 13 low-mass X-ray binaries. These selected sources exhibit burst oscillations in X-rays with frequencies ranging from 45 to 1 122 Hz and have a binary orbital period varying from 2.1 to 18.9 h.
Yunus Emre Bahar, Manoneeta Chakraborty, Ersin Göğüş   +2 more
openaire   +4 more sources

XMM-Newton X-ray study of early type stars in the Carina OB1 association [PDF]

, 2007
<p><b>Aims:</b> X-ray properties of the stellar population in the Carina OB1 association are examined with special emphasis on early-type stars.
Albacete-Colombo, Allen, Antokhin, Antokhina, Bauer, Berghöfer, Bessell, Bohlin, Briggs, Carpenter, Carraro, Cherepashchuk, Corcoran, Corcoran, Corcoran, Cudworth, Davidson, DeGioia-Eastwood, Dessart, Dessart, Evans, Evans, Favata, Favata, Feinstein, Feldmeier, Fiore, Freyhammer, G. Rauw, Gagné, Giacconi, Giardino, Hamaguchi, Harnden, I. I. Antokhin, J. C. Brown, J.-M. Vreux, Jeffries, K. A. van der Hucht, Kahn, Lada, Leitherer, Leutenegger, Levato, Linder, Long, Lucy, Lucy, Lucy, Maheswaran, Maheswaran, Massey, Massey, Massey, Megeath, Meyer, Morrell, Motch, Nandra, Nazé, Niemela, Owocki, Owocki, Pallavicini, Pollock, Pollock, Preibisch, Prilutskii, Raassen, Rathborne, Rauw, Rauw, Rauw, Raymond, Sana, Sana, Sana, Sanchawala, Schlegel, Serio, Seward, Seward, Skinner, Smith, Smith, Stephenson, Stevens, Stevens, Stevens, Tapia, ud-Doula, Usov, Viotti, Walborn, Waldron, Weis   +95 more
core   +4 more sources

JET MODELS FOR NEUTRON STAR X-RAY BINARIES

International Journal of Modern Physics: Conference Series, 2012
A variety of different models for jet formation have been developed over the years (mainly) for black hole systems and young stellar objects. Conclusive observational constraints which would favor one particular mechanism are difficult to obtain.
Migliari, S., Ghisellini, G., Miller-Jones, J., Russell, D.   +3 more
openaire   +3 more sources

Low-Mass X-Ray Binaries with Strange Quark Stars [PDF]

Publications of the Astronomical Society of the Pacific, 2013
Strange quark stars (SSs) may originate from accreting neutron stars (NSs) in low-mass X-ray binaries (LMXBs). Assuming that conversion of NS matter to SSs occurs when the core density of accreting NS reaches to the density of quark deconfinement, $\sim 5 _0$, where $ _0\sim 2.7\times 10^{14}$g cm$^{-3}$ is nuclear saturation density, we investigate
Zhu, Chunhua, Lv, Guoliang, Wang, Zhaojun, Liu, Jinzhong   +3 more
openaire   +2 more sources

Donor Stars in Black Hole X‐Ray Binaries [PDF]

The Astrophysical Journal, 1999
We study theoretically the formation of black-hole (BH) X-ray binaries. Consistency of the models with the observed relative numbers of systems with low-mass (<2 M_sun) and intermediate-mass (~2 M_sun - M_{BH}) donors leads to severe constraints on the evolutionary parameters of the progenitors.
openaire   +2 more sources

Masses of Neutron Stars in X-ray Binary Systems [PDF]

Symposium - International Astronomical Union, 1981
The masses of 6 neutron stars have now been established through studies of binary X-ray and radio pulsars. All of the masses are found to be consistent with, but not necessarily constrained to, the range 1.2–1.6 M⊙. In this talk we discuss the methods and assumptions used in determining the masses of neutron stars in binary X-ray pulsar systems.
R. L. Kelley, S. Rappaport
openaire   +1 more source

X-Raying the Birth of Binary Neutron Stars and Neutron Star–Black Hole Binaries

The Astrophysical Journal, 2022
Abstract We consider fallback accretion after an ultrastripped supernova (USSN) that accompanies formation of a binary neutron star (BNS) or a neutron star–black hole binary (NS–BH). The fallback matter initially accretes directly to the nascent NS, while it starts to accrete to the circumbinary disk, typically 0.1–1 day after the onset ...
Kazumi Kashiyama, Ryo Sawada, Yudai Suwa
openaire   +2 more sources

A CORAVEL radial-velocity monitoring of S stars: symbiotic activity vs. orbital separation [PDF]

, 1998
Orbital elements are presented for the Tc-poor S stars HR 363 (= HD 7351) and HD 191226. With an orbital period of 4592 d (=12.6 y), HR 363 has the longest period known among S stars, and yet it is a strong X-ray source. Its X-ray flux is similar to that
Carquillat, J. M., Ginestet, N., Jorissen, A., Udry, S.   +3 more
core   +1 more source

A ROSAT Survey of Contact Binary Stars

, 2005
Contact binary stars are common variable stars which are all believed to emit relatively large fluxes of x-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope with x-ray data from the ROSAT All-Sky ...
Hunsch M., M. T. Geske, McGale P. A., S. J. Gettel, T. A. McKay, Voges W.   +5 more
core   +1 more source