Results 51 to 60 of about 1,179 (279)

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

Revealing the Spectral State Transition of the Clocked Burster, GS 1826-238, with NuSTAR StrayCats

The Astrophysical Journal, 2023
We present the long-term analysis of GS 1826-238, a neutron star X-ray binary known as the Clocked Burster , using data from NuSTAR StrayCats. StrayCats, a catalog of NuSTAR stray light data, contains data from bright, off-axis X-ray sources that have ...
S. B. Yun, B. W. Grefenstette, R. M. Ludlam, M. C. Brumback, D. J. K. Buisson, G Mastroserio, S. N. Pike   +6 more
doaj   +1 more source

Measurement of neutron star parameters: A review of methods for low-mass X-ray binaries [PDF]

Advances in Space Research, 2010
30 pages, 20 figures, 1 table, An Invited and Refereed Review, will be published in "Advances in Space Research"
openaire   +3 more sources

FirstINTEGRALobservations of eight persistent neutron star low mass X-ray binaries [PDF]

Astronomy & Astrophysics, 2003
Early results from the INTEGRAL Core Program, for a sample of eight persistently bright neutron star low mass X-ray binaries in the energy range from 5 keV to 200 keV are presented. It is shown that INTEGRAL efficiently detects sources and that spectra may be obtained up to several hundreds of keV by combining data from three of the four INTEGRAL ...
PAIZIS, A., BECKMANN, V., COURVOISIER, T. J. L., VILHU, O., LUTOVINOV, A., EBISAWA, K., HANNIKAINEN, D., CHERNYAKOVA, M., ZURITA HERAS, J. A. , RODRIGUEZ, J. , ZDZIARSKI, A. A. , BAZZANO, A. , KUULKERS, E. , OOSTERBROEK, T., FRONTERA, Filippo, F. , GIMENEZ, A. , GOLDONI, P. , SANTANGELO, A. , PALUMBO, G. G. C.   +20 more
openaire   +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

Quasi-Periodic Oscillations from Low-mass X-Ray Binaries with Neutron Stars [PDF]

AIP Conference Proceedings, 2004
Before the launch of the Rossi X-ray Timing Explorer (RXTE) it was recognized that neutron star accretion disks could extend inward to very near the neutron star surface, and thus be governed by millisecond timescales. Previous missions lacked the sensitivity to detect them. The kilohertz quasi-periodic oscillations (QPO) that RXTE discovered are often,
openaire   +4 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

A Comprehensive Study of Thermonuclear X-Ray Bursts from 4U 1820–30 with NICER: Accretion Disk Interactions and a Candidate Burst Oscillation

The Astrophysical Journal
We present the results obtained from timing and spectral studies of 15 thermonuclear X-ray bursts from 4U 1820–30 observed with the Neutron Star Interior Composition Explorer (NICER) during its 5 yr of observations between 2017 and 2022.
Gaurava K. Jaisawal, Z. Funda Bostancı, Tuğba Boztepe, Tolga Güver, Tod E. Strohmayer, David R. Ballantyne, Jens H. Beck, Ersin Göğüş, Diego Altamirano, Zaven Arzoumanian, Deepto Chakrabarty, Keith C. Gendreau, Sebastien Guillot, Renee M. Ludlam, Mason Ng, Andrea Sanna, Jérôme Chenevez   +16 more
doaj   +1 more source

News on the X-ray emission from hot subdwarf stars

Open Astronomy, 2017
In latest years, the high sensitivity of the instruments on-board the XMM-Newton and Chandra satellites allowed us to explore the properties of the X-ray emission from hot subdwarf stars.
Palombara Nicola La, Mereghetti Sandro
doaj   +1 more source

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