Results 31 to 40 of about 85,552 (296)

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

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

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

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

A Comparison of Millisecond Pulsar Populations between Globular Clusters and the Galactic Field

The Astrophysical Journal, 2023
We have performed a systematic study of the rotational, orbital, and X-ray properties of millisecond pulsars (MSPs) in globular clusters (GCs) and compared their nature with those of the MSPs in the Galactic field (GF).
Jongsu Lee, C. Y. Hui, J. Takata, A. K. H. Kong, Pak-Hin Thomas Tam, Kwan-Lok Li, K. S. Cheng   +6 more
doaj   +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

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

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

A Rich Population of X-ray Emitting Wolf-Rayet Stars in the Galactic Starburst Cluster Westerlund 1

, 2006
Recent optical and IR studies have revealed that the heavily-reddened starburst cluster Westerlund 1 (Wd 1) contains at least 22 Wolf-Rayet (WR) stars, comprising the richest WR population of any galactic cluster. We present results of a senstive Chandra
A. Damineli, A. E. Simmons, F. Palla, M. Teodoro, S. A. Zhekov, S. L. Skinner, Skinner S. L., Westerlund B. E.   +7 more
core   +2 more sources

Distinct Systemic Sclerosis Phenotypes Related to Ethnicity: An Opportunity to Personalize Care?

Arthritis Care &Research, Accepted Article.
Objective The objective is to describe and compare demographic, clinical and serological characteristics of systemic sclerosis (SSc) patients according to ethnic background. Methods Participants enrolled in the Canadian Scleroderma Research Group cohort who self‐identified to a single ethnicity group were included.
Danick Goulet, Camille Guertin, Maggie Larché, Isabelle Ferdinand, Marie Hudson, May Y. Choi, Mohammed Osman, Janet Pope, Carter Thorne, Murray Baron, Canadian Scleroderma Research Group, M. Baron, M.Y. Choi, P. Docherty, P.R. Fortin, M. Fritzler, G. Gyger, S. Hoa, M. Hudson, A. Ikic, N. Jones, H. Kim, N. Khalidi, M. Larché, S. LeClercq, N. Maltez, A. Man, A. Masetto, J. Pope, D. Robinson, E. Sutton, C. Thorne, Sasha Bernatsky, Sabrina Hoa   +33 more
wiley   +1 more source