Results 11 to 20 of about 83,767 (197)

Beam Pattern Evolution of Accreting X-Ray Pulsar 1A 0535+262 during Its 2020 Giant Outburst

The Astrophysical Journal, 2023
We report on pulse profile decomposition analysis of bright transient X-ray pulsar 1A 0535+262 using broadband Insight-HXMT observations during a giant outburst of the source in 2020.
Y. F. Hu, L. Ji, C. Yu, P. J. Wang, V. Doroshenko, A. Santangelo, I. Saathoff, S. N. Zhang, S. Zhang, L. D. Kong   +9 more
doaj   +1 more source

Back to Business: SLX 1746–331 after 13 Years of Silence

The Astrophysical Journal, 2023
The black hole candidate system SLX 1746–331 was back to business in 2023, after a long silence of roughly 13 years. An outburst was observed thoroughly by Insight-HXMT and NICER.
Jing-Qiang Peng, Shu Zhang, Peng-Ju Wang, Shuang-Nan Zhang, Ling-Da Kong, Yu-Peng Chen, Qing-Cang Shui, Long Ji, Jin-Lu Qu, Lian Tao, Ming-Yu Ge, Rui-Can Ma, Zhi Chang, Jian Li, Zhao-sheng Li, Zhuo-Li Yu, Zhe Yan, Peng Zhang, Yun-Xiang Xiao, Shu-Jie Zhao   +19 more
doaj   +1 more source

A dozen colliding wind X-ray binaries in the star cluster R136 in the 30Doradus region [PDF]

, 2002
We analyzed archival Chandra X-ray observations of the central portion of the 30 Doradus region in the Large Magellanic Cloud. The image contains 20 X-ray point sources with luminosities between $5 \times 10^{32}$ and $2 \times 10^{35}$ erg s$^{-1}$ (0.2
Bosch G., Brandl B., Cherepashchuk A. M., Corcoran M. F., Crowther P. A., David Pooley, Fehrenback C., Hamann W., Melnick J., Melnick J., Mewe R., Meynet G., Nugis T., Portegies Zwart S. F., Prilutskii O. F., Puls J., Schaerer D., Simon F. Portegies Zwart, Walter H. G. Lewin, Weigelt G., Westerlund B. E., Westerlund B. E.   +21 more
core   +9 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

Magnetic Flares on Asymptotic Giant Branch Stars [PDF]

, 2002
We investigate the consequences of magnetic flares on the surface of asymptotic giant branch (AGB) and similar stars. In contrast to the solar wind, in the winds of AGB stars the gas cooling time is much shorter than the outflow time.
Bochanski J. J., Burlaga L. F., Dorfi E. A., Hunsch M., Hunsch M., Joel H. Kastner, Loup C., Noam Soker, Reimers C., Schroder K.-P., Woitke P., Woitke P., Woitke P., Zijlstra A. A.   +13 more
core   +4 more sources

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

The conspicuous absence of X-ray emission from carbon-enriched Wolf-Rayet stars [PDF]

, 2003
The carbon-rich WC5 star WR 114 was not detected during a 15.9 ksec XMM-Newton observation, implying an upper limit to the X- ray luminosity of L-X less than or similar to 2.5 x 10(30) erg s(-1) and to the X-ray to bolometric luminosity ratio of L- X/L ...
A. M. T. Pollock, Berghöfer, Cassinelli, Castor, Chapman, Coker, Corcoran, Feldmeier, Feldmeier, Figer, Gaensler, Gayley, Gehrels, Groenewegen, Gräfener, Hamann, Harnden, Hasinger, Ignace, Ignace, Ignace, J. C. Brown, Jansen, Kahn, Kitamoto, Kudritzki, L. M. Oskinova, Lamb, Lucy, Lucy, Massey, Owocki, Owocki, Pallavicini, Pollock, Pollock, R. Ignace, Runacres, Schulz, Seward, Skinner, Skinner, Skinner, Smith, Stevens, Tanaka, Torres, Usov, Vacca, van der Hucht, W.-R. Hamann, Waldron, Watson, Wessolowski, Williams, Woosley, Zhekov   +56 more
core   +3 more sources

New Direct Observational Evidence for Kicks in SNe [PDF]

, 2000
We present an updated list of direct strong evidence in favour of kicks being imparted to newborn neutron stars. In particular we discuss the new cases of evidence resulting from recent observations of the X-ray binary Circinus X-1 and the newly ...
Heuvel, E. P. J. van den, Tauris, T. M.
core   +2 more sources

X-Ray and UV Observations of the Contact Binary KIC 9832227

The Astronomical Journal, 2023
We investigate the X-ray and UV emission from the contact binary star KIC 9832227, which was observed with XMM-Newton for one orbital cycle. The binary is detected with an average X-ray luminosity of 3.4 × 10 ^30 erg s ^−1 .
Dirk Pandel, Lawrence A. Molnar
doaj   +1 more source

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