Results 11 to 20 of about 26,707 (264)

X-ray Emission from O Stars [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractYoung O stars are strong, hard, and variable X-ray sources; properties that strongly affect their circumstellar and galactic environments. After ≈ 1 Myr, these stars settle down to become steady sources of soft X-rays. I will use high-resolution X-ray spectroscopy and MHD modeling to show that young O stars like θ1 Ori C are well explained by ...
Cohen, David H., David H. Cohen
openaire   +6 more sources

Clumping and X-Rays in cooler B supergiant stars [PDF]

, 2023
B supergiants (BSGs) are evolved stars with effective temperatures between 10 to 30 kK and are important to understand massive star evolution. Located on the edge of the line-driven wind regime, the study of their atmospheres is helpful to understand ...
A. A. C. Sander, Bernini-Peron, M., Marcolino, Wagner L. F., Oskinova, L., Najarro, Francisco, Ramachandran, V., J. Saling, F. R. N. Schneider, Marcolino, W., L F, L. M. Oskinova, Bouret, Jean-Claude, Bernini-Peron, Matheus, F. Najarro, Saling, J., Bouret, J.-C., Saling, Julian, Najarro, F., V. Ramachandran, Ramachandran, Varsha, J.-C. Bouret, Schneider, F., M. Bernini-Peron, Oskinova, Lidia M., W. L. F. Marcolino, Sander, Andreas A. C., Schneider, Fabian R. N.   +25 more
core   +2 more sources

X-rays from magnetic massive OB stars [PDF]

, 2013
The magnetic activity of solar-type and low-mass stars is a well known source of coronal X-ray emission. At the other end of the main sequence, X-rays emission is instead associated with the powerful, radiatively driven winds of massive stars.
Gagne, Marc, Townsend, R. H. D., Leutenegger, M. A., Nazé, Y., Naze´, Y., Petit, V., Owocki, S. P., ud-Doula, A., Wade, G. A., Nazé, Yaël, Cohen, David H., Gagné, M., Cohen, D. H., Townsend, R. H.D.   +13 more
core   +1 more source

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 ...
Giuseppe Pagliara, Drago, Alessandro, Alessandro Drago, Pagliara, Giuseppe   +3 more
core   +1 more source

Accretion and outflow-related X-rays in T Tauri stars [PDF]

, 2007
We report on accretion- and outflow-related X-rays from T Tauri stars, based on results from the X-rays potentially form in shocks of accretion streams near the stellar surface, although we hypothesize that direct interactions between the streams and ...
Thomas Preibisch, Rebull, Luisa, Palla, Francesco, Scelsi, Luigi, Padgett, Deborah, Giusi Micela, Franciosini, Elena, Sylvain Guieu, Luigi Scelsi, Deborah Padgett, Montmerle, Thierry, Menard, Francois, Stelzer, Beate, Marc Audard, Bruno Silva, Beate Stelzer, François Ménard, Eric Feigelson, Dougados, Catherine, Guieu, Sylvain, Jérôme Bouvier, Audard, Marc, Glauser, Adrian, Pillitteri, Ignazio, Gudel, Manuel, Monin, Jean-Louis, Feigelson, Eric, Manuel Güdel, Telleschi, Alessandra, Kevin Briggs, Micela, Giusi, Preibisch, Thomas, Elena Franciosini, Catherine Dougados, Stephen Skinner, Silva, Bruno, Briggs, Kevin, Skinner, Stephen, Ignazio Pillitteri, Arzner, Kaspar, Francesco Palla, Bouvier, Jerome, Grosso, Nicolas, Jean-Louis Monin, Adrian Glauser, Thierry Montmerle, Kaspar Arzner, Alessandra Telleschi, Nicolas Grosso, Luisa Rebull   +49 more
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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.
I. I. Antokhin, J. C. Brown, Rauw, G., G. Rauw, J.-M. Vreux, Antokhin, I. I., Antokhin, I.I., Brown, J.C., van der Hucht, K.A., Rauw, Grégor, K. A. van der Hucht, Vreux, Jean-Marie, Vreux, J.M., van der Hucht, K. A., Brown, J. C.   +14 more
core   +1 more source

Simulations of X-ray bursts and superbursts [PDF]

, 2015
Observations of neutron star in binary systems provide powerful constrains on the physics at the surface of neutron stars. During the accretion of matter from the companion star, periodic nuclear explosion are triggered in the outer layers of the neutron
Fehlmann, Sofie
core   +1 more source

Diffraction Of X Rays In Capillary Optics [PDF]

, 2000
Propagation of x rays generated by a small-diameter incoherent source through the capillary waveguide that satisfies the multimode condition is studied with the Fresnel-Kirchhoff diffraction theory.
Marinai, Alessandro, Flora, Francesco, Kukhlevsky, Sergei V.   +2 more
core   +1 more source

Why are accreting T Tauri stars observed to be less luminous in X-rays than non-accretors? [PDF]

, 2007
Accreting T Tauri stars are observed to be less luminous in X-rays than non-accretors, an effect that has been detected in various star-forming regions.
K. Wood, Gregory, S. G.; id_orcid, Gregory, S. G., Jardine, M., M. Jardine, S. G. Gregory, Wood, K.   +6 more
core   +1 more source

X-Ray Emission of Massive Stars and Their Winds

, 2022
Invited chapter of the Handbook of X-ray and Gamma-ray ...
openaire   +2 more sources