Results 11 to 20 of about 70,191 (293)

News on the X-ray emission from hot subdwarf stars [PDF]

Open Astronomy, 2017
In latest years, the high sensitivity of the instruments on-board the XMM-Newton and Chandra satellites allowed us to explore the properties of the X-ray emission from hot subdwarf stars.
Palombara Nicola La, Mereghetti Sandro
doaj   +3 more sources

Accreting Neutron Stars in Low-Mass X-Ray Binary Systems [PDF]

, 2008
Using the Rossi X-ray Timing Explorer (RossiXTE), astronomers have discovered that disk-accreting neutron stars with weak magnetic fields produce three distinct types of high-frequency X-ray oscillations.
Frederick K. Lamb, Stratos Boutloukos
openalex   +3 more sources

Rapid X-ray variability of neutron stars in low-mass binary systems [PDF]

, 1999
The dramatic discovery with the Rossi X-Ray Timing Explorer satellite of remarkably coherent $\sim$300--1200 Hz oscillations in the X-ray brightness of some sixteen neutron stars in low-mass binary systems has spurred theoretical modeling of these ...
Frederick K. Lamb, M. Coleman Miller, Dimitrios Psaltis   +2 more
openalex   +4 more sources

Swings between rotation and accretion power in a millisecond binary pulsar [PDF]

, 2013
It is thought that neutron stars in low-mass binary systems can accrete matter and angular momentum from the companion star and be spun-up to millisecond rotational periods.
A Papitto, A Papitto, A Patruno, A. Papitto, A. Possenti, A. Riggio, AM Archibald, AS Fruchter, BM Gaensler, C. Ferrigno, D Bhattacharya, D Chakrabarty, D Chakrabarty, D. F. Torres, DA Leahy, DC Backer, E. Bozzo, F Pacini, G. F. Wong, GS Bisnovatyi-Kogan, I. H. Stairs, J van Paradijs, J. M. Sarkissian, J. W. T. Hessels, JM Hartman, L Burderi, L Burderi, L Stella, L. Burderi, L. Pavan, L. Stella, M Burgay, M Ruderman, M. Burgay, M. D. Filipović, M. Falanga, M. H. Wieringa, MA Alpar, N. Rea, P. C. C. Freire, P. Romano, R Wijnands, RN Manchester, S Bogdanov, S Campana, S. Campana, S. M. Ransom, T Di Salvo, T. Di Salvo, V Radhakrishnan, WE Harris, WHG Lewin   +51 more
core   +9 more sources

Populating the Galaxy with low-mass X-ray binaries [PDF]

, 2006
We perform binary population synthesis calculations to investigate the incidence of low-mass X-ray binaries and their birth rate in the Galaxy. We use a binary evolution algorithm that models all the relevant processes including tidal circularization and
Hurley, Jarrod R., Kiel, Paul D.
core   +3 more sources

X-rays from Hot Subdwarfs [PDF]

, 2015
Thanks to the high sensitivity of the instruments on board the XMM-Newton and Chandra satellites, it has become possible to explore the properties of the X-ray emission from hot subdwarfs.
La Palombara, Nicola, Mereghetti, Sandro
core   +3 more sources

Probing the composition of sub-millisecond rotating compact stars by r-modes instability [PDF]

, 2012
We investigate the implications of the r-modes instability on the composition of a compact star rotating at a sub-millisecond period. In particular, the only viable astrophysical scenario for such an object, wich might present inside the Low Mass X-ray ...
Drago, Alessandro, Pagliara, Giuseppe
core   +1 more source

New periodic variable stars coincident with ROSAT sources discovered using SuperWASP [PDF]

, 2007
We present optical lightcurves of 428 periodic variable stars coincident with ROSAT X-ray sources, detected using the first run of the SuperWASP photometric survey. Only 68 of these were previously recognised as periodic variables.
A. Collier Cameron, A. J. Norton, Akerlof, Alekseev, Alekseev, B. Enoch, Bejgman, Boller, Bouvier, Bouvier, Bouvier, Brancewicz, Brelstaff, C. A. Haswell, C. Hellier, Chrastina, Collier Cameron, Collier Cameron, D. J. Christian, D. M. Wilson, D. Pollacco, Deeter, Dempsey, Engle, Evans, Feast, Gershberg, Hall, Hall, Hartmann, I. Skillen, J. Irwin, J. P. Nicholas, Jeffries, K. Horne, Koen, Loomis, M. Gallaway, Meinunger, Monet, N. Parley, Neuhauser, P. J. Wheatley, Pallavicini, Pettersen, Pizzolato, Pribulla, Qian, R. A. Street, R. G. West, R. Ryans, Rosner, S. R. Kane, Schmidt, Schmidt, Selam, Skillen, Stanishev, Strassmeier, T. A. Lister, Tamuz, Turner, Vilhu, W. I. Clarkson, Walter, Wegner, Wheatley, Zhang   +67 more
core   +3 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

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