Results 61 to 70 of about 17,679,315 (300)

Photospheric Radius Expansion Thermonuclear Burst and X-Ray Reflection from the Neutron Star X-Ray Binary 4U 1702-429

The Astrophysical Journal
We perform a comprehensive study of thermonuclear bursts from the neutron star low-mass X-ray binary 4U 1702–429 detected with NICER and XMM-Newton. The thermonuclear burst detected with NICER shows clear evidence of a photospheric radius expansion (PRE)
Manoj Mandal, Sachindra Naik, Gaurava Kumar Jaisawal   +2 more
doaj   +1 more source

Return of 4U 1730–22 after 49 yr Silence: The Outburst Properties Observed by NICER and Insight-HXMT

The Astrophysical Journal Letters, 2022
After 49 yr of quiescence, 4U 1730–22 became active and had two outbursts in 2021 and 2022; the onset and tail of the outbursts were observed by NICER, which give us a peerless opportunity to study the state transition and its underlying mechanism.
Yu-Peng Chen, Shu Zhang, Shuang-Nan Zhang, Long Ji, Peng-Ju Wang, Ling-Da Kong, Zhi Chang, Jing-Qiang Peng, Qing-Cang Shui, Jian Li, Lian Tao, Ming-Yu Ge, Jin-Lu Qu   +12 more
doaj   +1 more source

A CHANGE IN THE QUIESCENT X-RAY SPECTRUM OF THE NEUTRON STAR LOW-MASS X-RAY BINARY MXB 1659–29 [PDF]

The Astrophysical Journal, 2013
6 pages, 4 figures, accepted for publication in ...
Cackett, E.M., Brown, E.F., Cumming, A., Degenaar, N., Fridriksson, J., Homan, J., Miller, J.M., Wijnands, R.   +7 more
openaire   +5 more sources

Emerging Post‐CMOS Hardware Neurons for Brain‐Inspired Computing: Devices, Circuits, and System Integration

Advanced Functional Materials, EarlyView.
The physical realization of artificial neurons is a critical challenge for energy‐efficient neuromorphic computing. This review presents a comprehensive analysis of the evolution of artificial neuron implementations from conventional CMOS to emerging post‐CMOS technologies.
Kannan Udaya Mohanan, Hocheon Yoo, Benoît H. Lessard, Ioannis Kymissis, Chang‐Hyun Kim   +4 more
wiley   +1 more source

X-ray polarization of Z-type neutron star low-mass X-ray binaries

Astronomy & Astrophysics
IXPE has provided for the first time detailed energy- and time-resolved X-ray polarimetry of Z-type neutron star low-mass X-ray binaries (NS-LMXBs) as they move along their color-color diagrams (CCDs). These sources can reach the highest polarization observed for NS-LXMBs in the 2–8 keV range when they move along the horizontal ...
Andrea Gnarini, Francesco Ursini, Giorgio Matt, Stefano Bianchi, Fiamma Capitanio, Massimo Cocchi, Sergio Fabiani, Ruben Farinelli, Philip Kaaret, Lorenzo Marra, Antonella Tarana   +10 more
  +5 more sources

On the Origin of Spectral Features Observed during Thermonuclear X-Ray Bursts and in the Aftermath Emission of a Long Burst from 4U 1820–30

The Astrophysical Journal
We study 15 thermonuclear X-ray bursts from 4U 1820–30 observed with the Neutron Star Interior Composition Explorer (NICER). We find evidence of a narrow emission line at 1.0 keV and three absorption lines at 1.7, 3.0, and 3.75 keV, primarily around the ...
Gaurava K. Jaisawal, Jérôme Chenevez, Tod E. Strohmayer, Hendrik Schatz, J. J. M. in ’t Zand, Tolga Güver, Diego Altamirano, Zaven Arzoumanian, Keith C. Gendreau   +8 more
doaj   +1 more source

High-resolution spectroscopy of the low-mass X-ray binary

, 2001
We present initial results from observations of the low-mass X-ray binary EXO 0748 ...
S. M. Kahn, J. Cottam, A. C. Brinkman, C. Erd, J. W. den Herder   +4 more
core   +1 more source

Optical spectroscopy of the low-mass X-ray binary GX 9+9 [PDF]

, 2007
Phase-resolved medium-resolution VLT spectroscopy of the low-mass X-ray binary GX 9+9 has revealed narrow C ill emission lines that move in phase relative to our new estimate of the ephemeris, and show a velocity amplitude of 230 +/not superset of 35 km ...
Hynes, R. I., Cornelisse, R., Steeghs, D., Casares, J., Charles, P. A., Hynes, R.I., Charles, P.A., O\u27Brien, K., O'Brien, K., Barnes, A. D., Barnes, A.D.   +10 more
core   +1 more source

Nitride MXenes Beyond Carbides: Bridging the Gap Between Computational Prediction and Experimental Realization

Advanced Functional Materials, EarlyView.
Nitride MXenes remain constrained by a persistent gap between computational prediction and experimental realization. This Review identifies the thermodynamic, kinetic, and chemical barriers limiting their synthesis, critically evaluates emerging fabrication routes, and proposes a multidimensional computational‐experimental framework to accelerate the ...
Naresh Varnakavi, Masoud Soroush
wiley   +1 more source

Chasing the Break: Tracing the Full Evolution of a Black Hole X-Ray Binary Jet with Multiwavelength Spectral Modeling

The Astrophysical Journal
Black hole (BH) X-ray binaries (XRBs) are ideal targets to study the connection between accretion inflow and jet outflow. Here we present quasi-simultaneous, multiwavelength observations of the Galactic BH system MAXI J1820+070, throughout its 2018–2019 ...
Constanza Echiburú-Trujillo, Alexandra J. Tetarenko, Daryl Haggard, Thomas D. Russell, Karri I. I. Koljonen, Arash Bahramian, Jingyi Wang, Michael Bremer, Joe Bright, Piergiorgio Casella, David M. Russell, Diego Altamirano, M. Cristina Baglio, Tomaso Belloni, Chiara Ceccobello, Stephane Corbel, Maria Diaz Trigo, Dipankar Maitra, Aldrin Gabuya, Elena Gallo, Sebastian Heinz, Jeroen Homan, Erin Kara, Elmar Körding, Fraser Lewis, Matteo Lucchini, Sera Markoff, Simone Migliari, James C. A. Miller-Jones, Jerome Rodriguez, Payaswini Saikia, Craig L. Sarazin, Tariq Shahbaz, Gregory Sivakoff, Roberto Soria, Vincenzo Testa, Bailey E. Tetarenko, Valeriu Tudose   +37 more
doaj   +1 more source