Results 111 to 120 of about 131,686 (354)

Obscuring Supersoft X-ray Sources in Stellar Winds

, 2011
We investigate the possibility of obscuring supersoft X-ray sources in the winds of companion stars. We derive limits on the amount of circumstellar material needed to fully obscure a 'canonical' supersoft X-ray source in the Large Magellanic Cloud, as ...
Dominik, Carsten, Nelemans, Gijs, Nielsen, Mikkel Thomas Bøje   +2 more
core   +1 more source

Binary X-Ray Stars and Supernovae of Type I [PDF]

Symposium - International Astronomical Union, 1976
Most of the strong galactic X-ray sources must be low mass, close binary systems, such as Her X-1 and Sco X-1. Two evolutionary scenarios are discussed, both involving type I supernovae that occur when mass-accreting white dwarfs are driven over their mass limit.
openaire   +2 more sources

K-band spectroscopy of Be-star X-ray binaries [PDF]

Monthly Notices of the Royal Astronomical Society, 1993
We present the first 2.0-2.5 μm spectra of four Be/X-ray binaries, at a resolution of λ/Δλ = 310-400. The spectra show strong hydrogen recombination lines, notably Brγ and, in most cases, the higher order Pfund series. The relative recombination strengths imply that Brγ has a large optical depth, whereas the Pfund lines have relative strengths close to
Andrew Norton, P. Roche, S. J. Unger, C. Everall, M. J. Coe   +4 more
openaire   +2 more sources

CALPHAD‐Guided Prediction and Interpretation of Phase Formation in Ta–Mo–Cr–Ti–Al Refractory High‐Entropy Alloys

Advanced Engineering Materials, EarlyView.
This study designs Ta–Mo–Cr–Ti–Al refractory high‐entropy alloys with a disordered body‐centered‐cubic A2 crystal structure aiming for improved ductility, lower density, and oxidation resistance. Four alloy compositions are identified by thermodynamic calculations.
Kateryna Khanchych, Chongchong Tang, Carsten Schroer, Björn Schäfer, Judith Jung, Michael Dürrschnabel, Ute Jäntsch, Bronislava Gorr   +7 more
wiley   +1 more source

POSYDON: A General-purpose Population Synthesis Code with Detailed Binary-evolution Simulations

The Astrophysical Journal Supplement Series, 2023
Most massive stars are members of a binary or a higher-order stellar system, where the presence of a binary companion can decisively alter their evolution via binary interactions. Interacting binaries are also important astrophysical laboratories for the
Tassos Fragos, Jeff J. Andrews, Simone S. Bavera, Christopher P. L. Berry, Scott Coughlin, Aaron Dotter, Prabin Giri, Vicky Kalogera, Aggelos Katsaggelos, Konstantinos Kovlakas, Shamal Lalvani, Devina Misra, Philipp M. Srivastava, Ying Qin, Kyle A. Rocha, Jaime Román-Garza, Juan Gabriel Serra, Petter Stahle, Meng Sun, Xu Teng, Goce Trajcevski, Nam Hai Tran, Zepei Xing, Emmanouil Zapartas, Michael Zevin   +24 more
doaj   +1 more source

X-ray Emission from Nitrogen-Type Wolf-Rayet Stars

, 2009
We summarize new X-ray detections of four nitrogen-type Wolf-Rayet (WR) stars obtained in a limited survey aimed at establishing the X-ray properties of WN stars across their full range of spectral subtypes.
Arnal, Babel, Baum, Berghöfer, Borkowski, Cappa, Cassinelli, Chu, Crowther, Dyson, Feldmeier, Gregory, Gruendl, Gruendl, Howarth, Ignace, Ignace, Kimberly R. Sokal, Lipunov, Lépine, Maeda, Manuel Güdel, Marston, Marston, Mason, Miller, Morel, Owocki, Owocki, Pollock, Press, Prilutskii, Schmutz, Schmutz, Schulz, Skinner, Skinner, Skinner, Skinner, Skinner, Smith, St.-Louis, Stephen L. Skinner, Svetozar A. Zhekov, ud-Doula, van den Heuvel, van der Hucht, van der Hucht, Waldron, Werner Schmutz, Willis, Zhekov   +51 more
core   +1 more source

Neutron Stars and Black Holes in X-ray Binaries [PDF]

, 1998
Galactic accretion driven stellar X-ray sources can be divided into groups in different ways. An important division, which covers almost all known X-ray binaries, can be made according to the mass of the donor star: high-mass X-ray binaries and low-mass X-ray binaries. Another distinction (partially overlapping with the previous one) can be made on the
openaire   +2 more sources

Powder Metallurgy Preparation of Metastable β Ti–Cr–Ge Alloys for Medical Applications

Advanced Engineering Materials, EarlyView.
This study develops metastable β Ti–Cr–Ge alloys using powder metallurgy for biomedical implants. The Ti–10Cr–2Ge alloy exhibits superior mechanical performance with high yield strength (>1100 MPa), low Young's modulus (<85 GPa), and excellent strain hardening behavior.
Teddy Sjafrizal, Damon Kent, Ali Dehghan‐Manshadi, Matthew S. Dargusch   +3 more
wiley   +1 more source

NICER, NuSTAR, and Insight-HXMT Views to the Newly Discovered Black Hole X-Ray Binary Swift J1727.8-1613

The Astrophysical Journal Letters
Swift J1727.8–1613 is a black hole X-ray binary newly discovered in 2023. We perform spectral analysis with simultaneous Insight-HXMT, NICER, and NuSTAR observations when the source was approaching the hard intermediate state.
Jing-Qiang Peng, Shu Zhang, Qing-Cang Shui, Shuang-Nan Zhang, Ling-Da Kong, Yu-Peng Chen, Peng-Ju Wang, Long Ji, Jin-Lu Qu, Lian Tao, Ming-Yu Ge, Zhi Chang, Jian Li, Zhao-sheng Li, Zhuo-Li Yu, Zhe Yan   +15 more
doaj   +1 more source

X-ray emission from Be star binaries

The Astrophysical Journal, 1985
A model in which a neutron star in an eccentric inclined orbit around a Be star passes through a ring of matter around the Be star has been used to explain the recurrent flares of X-ray emission from these systems. The optical emission during X-ray flares is due to partial absorption and reprocessing of the X-rays in the ring.
openaire   +2 more sources