Results 91 to 100 of about 2,080,218 (323)

Optical spectroscopy of (candidate) ultra-compact X-ray binaries [PDF]

open access: yes, 2004
We present (preliminary) results of our systematic spectroscopic study of (candidate) ultra-compact X-ray binaries. Most candidates are confirmed and we found the first optical spectra of (pure) carbon-oxygen accretion discs.
arxiv   +1 more source

THE YOUNGEST KNOWN X-RAY BINARY: CIRCINUS X-1 AND ITS NATAL SUPERNOVA REMNANT [PDF]

open access: yes, 2013
Because supernova remnants are short-lived, studies of neutron star X-ray binaries within supernova remnants probe the earliest stages in the life of accreting neutron stars.
S. Heinz   +10 more
semanticscholar   +1 more source

Assessing the Powder Bed Fusion–Laser Beam Potential of Glass‐Forming Alloys Using Single and Multitrack Laser Glazing Experiments

open access: yesAdvanced Engineering Materials, EarlyView.
Characterizations of the expanse of processes parameter combinations that can be used to minimize cracking and porosity while optimizing crystallization and hardness are used to assess laser processing of four glass‐forming alloys. The set of viable alloys for laser additive manufacturing is not the same as for suction casting; some alloys are common ...
Soumya Mohan   +3 more
wiley   +1 more source

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

open access: yesThe 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   +12 more
doaj   +1 more source

Dependence of the low-mass X-ray binary population on stellar age [PDF]

open access: yes, 2012
Aims. We investigate the dependence of the low-mass X-ray binary (LMXB) population in early-type galaxies on stellar age. Methods. We selected 20 massive nearby early-type galaxies from the Chandra archive occupying a relatively narrow range of masses ...
Zhongli Zhang, M. Gilfanov, Á. Bogdán
semanticscholar   +1 more source

The Viability of the Refractory High‐Entropy Alloy AlMo0.5NbTa0.5TiZr for High‐Temperature Structural Applications

open access: yesAdvanced Engineering Materials, EarlyView.
Refractory high‐entropy alloys have attracted substantial attention for future ultrahigh‐temperature structural applications. Here the progression of key phase transformations in AlMo0.5NbTa0.5TiZr is established and correlated to the mechanical performance, highlighting the importance of the B2 phase.
George J. Wise   +5 more
wiley   +1 more source

A Lack of 9 s Periodicity in the Follow-up NuSTAR Observation of LS 5039

open access: yesThe Astrophysical Journal, 2023
The Nuclear Spectroscopic Array (NuSTAR) observed the gamma-ray binary LS 5039 for a second time in order to check for the presence of a periodic signal candidate found in the data from the previous NuSTAR observation.
Oleg Kargaltsev   +3 more
doaj   +1 more source

High Repetition Rate Laser‐Induced Printing of Bioink with Picosecond Pulse Durations: Optimization of the Printing Process

open access: yesAdvanced Engineering Materials, EarlyView.
This study explores the use of laser‐induced forward transfer in the picosecond regime to create in vitro biomodels. Focusing on hydrodynamics and rheology, it investigates jet dynamics through time‐resolved imaging, optimizing laser fluence, biological ink viscosity, and printing distance to precisely control the volume and location of bioink ...
Lucas Duvert   +5 more
wiley   +1 more source

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

open access: yesThe 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   +15 more
doaj   +1 more source

Long-term Quasiperiodicity in LMXB 4U 1636–536

open access: yesThe Astrophysical Journal, 2023
We present the results of the low-mass X-ray binary 4U 1636–536 study. We performed a temporal analysis of all available RXTE/All-Sky Monitor, RXTE/Proportional Counter Array, Swift/Burst Alert Telescope, and MAXI data collected until the middle of 2022.
Mateusz Wiśniewicz   +4 more
doaj   +1 more source

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