Results 91 to 100 of about 131,686 (354)

X-Ray Polarimetry as a Tool to Constrain Orbital Parameters in X-Ray Binaries

The Astrophysical Journal
X-ray binary systems consist of a companion star and a compact object in close orbit. Thanks to their copious X-ray emission, these objects have been studied in detail using X-ray spectroscopy and timing.
John Rankin, Vadim Kravtsov, Fabio Muleri, Juri Poutanen, Frédéric Marin, Fiamma Capitanio, Giorgio Matt, Enrico Costa, Alessandro Di Marco, Sergio Fabiani, Fabio La Monaca, Lorenzo Marra, Paolo Soffitta   +12 more
doaj   +1 more source

Simultaneous NICER and NuSTAR Observations of the Ultracompact X-Ray Binary 4U 0614+091

The Astrophysical Journal, 2023
We present the first joint NuSTAR and NICER observations of the ultracompact X-ray binary 4U 0614+091. This source shows quasiperiodic flux variations on the timescale of ∼days.
D. L. Moutard, R. M. Ludlam, J. A. García, D. Altamirano, D. J. K. Buisson, E. M. Cackett, J. Chenevez, N. Degenaar, A. C. Fabian, J. Homan, A. Jaodand, S. N. Pike, A. W. Shaw, T. E. Strohmayer, J. A. Tomsick, B. M. Coughenour   +15 more
doaj   +1 more source

Observations of Binary and Single Wolf-Rayet Stars with XMM-Newton and Chandra

, 2005
We present an overview of recent X-ray observations of Wolf-Rayet (WR) stars with XMM-Newton and Chandra. A new XMM spectrum of the nearby WN8 + OB binary WR 147 shows hard absorbed X-ray emission, including the Fe K-alpha line complex, characteristic of
H.R. Schild, J.M. Pittard, K.A. van der Hucht, L. Koesterke, Manuel Güdel, S. Lépine, S.L. Skinner, S.L. Skinner, S.L. Skinner, Stephen Skinner, Svetozar Zhekov, T.W. Berghöfer, Werner Schmutz   +12 more
core   +2 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

Bursts, eclipses, dips and a refined position for the luminous low-mass X-ray binary in the globular cluster Terzan 6 [PDF]

, 2003
GRS 1747-312 is a bright transient X-ray source in the globular cluster Terzan 6 with quasi-periodic outbursts approximately every 4.5 months. We carried out 2-60 keV target-of-opportunity observations during eight outbursts with the Proportional Counter
J. Zand, J. Zand, F. Hulleman, C. Markwardt, C. Markwardt, M. Méndez, E. Kuulkers, R. Cornelisse, R. Cornelisse, J. Heise, J. Heise, T. Strohmayer, F. Verbunt   +12 more
semanticscholar   +1 more source

Statistical Distributions of Morphologically Classified Defects in Metal Additive Manufacturing with Implications for Fatigue Life Prediction

Advanced Engineering Materials, EarlyView.
Morphological features of three defect types in metal additive manufacturing (AM)—lack of fusion, keyhole, and gas‐entrapped pores—are statistically characterized using best‐fit distributions evaluated via coefficient‐of‐determination, Kolmogorov–Smirnov test, and quantile–quantile plots.
Ahmad Serjouei, Golnaz Shahtahmassebi
wiley   +1 more source

X-ray irradiation of the winds in binaries with massive components

, 2015
Binaries with hot massive components are strong X-ray sources. Besides the intrinsic X-ray emission of individual binary members originating in their winds, X-ray emission stems from the accretion on the compact companion or from wind collision.
Krticka, Jiri, Krtickova, Iva, Kubat, Jiri   +2 more
core   +1 more source

Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. I. The nature of the companion star [PDF]

, 2008
Context: The INTEGRAL hard X-ray observatory has revealed an emerging population of highly obscured X-ray binary systems through multi-wavelength observations.
Bird, Bird, Bodaghee, Bodaghee, Bohlin, Bronfman, C. Foellmi, Capitanio, Cardelli, Caron, Chaty, Chernyakova, Corbet, Corbet, Corbet, Corbet, Dean, Dickey, F. Rahoui, Filliatre, Hannikainen, Hannikainen, Hanson, Hill, in 't Zand, J. A. Tomsick, J. Rodriguez, Kennea, Kouveliotou, Kuulkers, Landolt, Lebrun, Levine, Liu, Liu, Lutovinov, Lutovinov, Lutovinov, Malizia, Malizia, Malizia, Markwardt, Masetti, Molkov, Munari, Munari, Negueruela, Negueruela, Nespoli, Patel, Pellizza, Persson, Predehl, R. Walter, Rahoui, Revnivtsev, Revnivtsev, Revnivtsev, Rodriguez, Rodriguez, Rodriguez, Rupen, Russeil, S. Chaty, Sguera, Sguera, Sguera, Smith, Smith, Stephen, Sunyaev, Swank, Thompson, Thompson, Tomsick, Tomsick, Tomsick, Türler, Walter, Walter, Zurita Heras   +80 more
core   +5 more sources

Laser Additive Manufacturing of Oxide‐Dispersion‐Strengthened Steels: A Simulation‐Based Comparison Between Powder Bed Fusion and Direct Energy Deposition

Advanced Engineering Materials, EarlyView.
Controlling the size and distribution of dispersoids is essential for optimizing the performance of oxide‐dispersion‐strengthened steels. This study focuses on nanoparticle dispersion and agglomeration during laser additive manufacturing of Fe20Cr alloy reinforced with ZrO 2 nanoparticles. Utilizing multiphysics phase‐field simulations and nanoparticle
Somnath Bharech, Yangyiwei Yang, Timileyin David Oyedeji, Prasanth Bondi, Mareen Goßling, Bilal Gökce, Bai‐Xiang Xu   +6 more
wiley   +1 more source

Population of X-Ray Sources in the Intermediate-age Cluster NGC 3532: a Test Bed for Machine-learning Classification

The Astrophysical Journal, 2023
Open clusters are thought to be the birthplace of most stars in the galaxy. Thus, they are excellent laboratories for investigating stellar evolution, and X-ray properties of various types of stars (including binary stars, evolved stars, and compact ...
Steven Chen, Oleg Kargaltsev, Hui Yang, Jeremy Hare, Igor Volkov, Blagoy Rangelov, John Tomsick   +6 more
doaj   +1 more source