Results 101 to 110 of about 52,761 (334)

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

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

Advanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal, Laura Calderón‐Rodríguez, Oksana Smirnova, Eren Grossmann, Aparna Binu Varghese, Karen Marlenne Garcia Alvarez, Andreas Schneemann, Thomas Hoyer, Ralf Wyrwa, Felix Helmut Schacher, Alexander Knebel   +10 more
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

A SEARCH FOR IRON EMISSION LINES IN THECHANDRAX-RAY SPECTRA OF NEUTRON STAR LOW-MASS X-RAY BINARIES [PDF]

The Astrophysical Journal, 2008
11 pages, accepted for publication in ...
D. Steeghs, D. Steeghs, Jeroen Homan, Jon M. Miller, Edward M. Cackett, Mariano Mendez, Walter H. G. Lewin, Rudy Wijnands, M. van der Klis, John C. Raymond   +9 more
openaire   +5 more sources

Engineering Strategies for 2D Layered Tin Halide Perovskite Field‐Effect Transistors

Advanced Functional Materials, EarlyView.
2D halide perovskites are promising candidates for field‐effect transistor (FET) applications due to their high stability and suppressed ion migration in the presence of bulky organic spacers. This review systematically summarizes the optimization engineering strategies of 2D perovskite FETs and future challenges, which provide guidance for developing ...
Shuanglong Wang, Zhitian Ling, Paul W. M. Blom, Tomasz Marszalek, Wojciech Pisula   +4 more
wiley   +1 more source

The Peculiar Disk Evolution of 4U 1630-472 Observed by Insight-HXMT During its 2022 and 2023 Outbursts

The Astrophysical Journal
We study the spectral properties of the black hole X-ray transient binary 4U 1630–472 during its 2022 and 2023 outbursts with Insight-HXMT observations. We find that the outbursts are in peculiar soft states.
Jing-Qiang Peng, Shu Zhang, Qing-Cang Shui, Yu-Peng Chen, Shuang-Nan Zhang, Ling-Da Kong, A. Santangelo, Zhuo-Li Yu, Long Ji, Peng-Ju Wang, Zhi Chang, Jian Li, Zhao-sheng Li   +12 more
doaj   +1 more source

X-ray views of neutron star low-mass X-ray binaries

, 2010
A neutron star low-mass X-ray binary is a binary stellar system with a neutron star and a low-mass companion star rotating around each other. In this system the neutron star accretes mass from the companion, and as this matter falls into the deep potential well of the neutron star, the gravitational potential energy is released primarily in the X-ray ...
openaire   +2 more sources

Analytical model of strange star in the low-mass X-ray binary 4U 1820-30 [PDF]

The European Physical Journal C, 2014
Some revisions have been made.
Kalam, Mehedi, Rahaman, Farook, Molla, Sajahan, Jafry, Md. Abdul Kayum, Hossein, Sk. Monowar   +4 more
openaire   +4 more sources

Ionic Metal Poly(heptazine Imides) and Single‐Atoms Interplay: Engineered Stability and Performance for Photocatalysis, Photoelectrocatalysis and Organic Synthesis

Advanced Functional Materials, EarlyView.
Poly(heptazine) imides (PHIs), a crystalline carbon nitride subclass, intercalate metals to deliver high stability, tunable electronics, and efficient charge separation. These features enable solar‐driven applications such as hydrogen evolution, CO₂ reduction, and organic synthesis.
Gabriel A. A. Diab, Izadora F. Reis, Chong Wang, Diandra Barreto, Oleksandr Savateev, Ivo F. Teixeira, Pablo Jiménez‐Calvo   +6 more
wiley   +1 more source

A Spectro-temporal View of Normal Branch Oscillations in Cygnus X-2 as Seen by NICER and NuSTAR

The Astrophysical Journal
We report the spectro-temporal study of the neutron star low mass X-ray binary Cygnus X-2 using NICER and NuSTAR data while the source was in the normal branch (NB).
Malu Sudha, Renee M. Ludlam, Diego Altamirano, Edward M. Cackett, Jeremy Hare   +4 more
doaj   +1 more source