Results 71 to 80 of about 1,179 (279)

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

open access: yesThe 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   +8 more
doaj   +1 more source

Updated Orbital Ephemeris and Detection of Superhump Modulation in X-Ray Band for the Ultra-compact Low Mass X-Ray Binary 4U 1820-30

open access: yesThe Astrophysical Journal, 2023
The 4U 1820-30 is an ultra-compact low-mass X-ray binary (LMXB) near the center of the globular cluster NGC 6624. Its negative orbital period derivative, observed from the phase evolution of its sinusoidal-like orbital variation, contradicts the positive
Yi Chou, Yao-Wun Jhang
doaj   +1 more source

On the lack of X-ray pulsation in most neutron star low-mass X-ray binaries

open access: yesMonthly Notices of the Royal Astronomical Society
ABSTRACT We have investigated whether the lack of X-ray pulsations from most neutron star (NS) low-mass X-ray binaries (LMXBs) could be due to the extension of their inner disc to the NS surface. To estimate the inner disc radii, we have employed the model, recently proposed to account for the torque reversals of LMXBs.
N Niang   +7 more
openaire   +3 more sources

Thermally Induced Gelling Systems Based on Patchy Polymeric Micelles

open access: yesAdvanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
A novel strategy to design thermally induced gelling systems with tunable material properties is reported. Polymeric mixed‐shell micelles displaying multiple thermosensitive patchy domains formed hydrogels by assembling into well‐entangled worm‐like network structures upon heating to body temperature. The patchy micelle design significantly affects the
Binru Han   +9 more
wiley   +1 more source

On the Broadening of the Characteristic Frequency Range toward Higher Photon Energies in the X-Ray Variability of the Black Hole Transient MAXI J1820+070

open access: yesThe Astrophysical Journal
Energy-dependent X-ray power spectral states and band-limited noise (BLN) components have been seen in the low-hard state and intermediate states of black hole X-ray binaries.
ChenXu Gao, Wenfei Yu, Zhen Yan
doaj   +1 more source

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

open access: yes, 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

An Overview of the Bowen Survey: Detecting Donor Star Signatures in Low Mass X-ray Binaries [PDF]

open access: yesAIP Conference Proceedings, 2008
5 pages, 3 figures, Proceedings of "A Population Explosion: The Nature and Evolution of X-ray Binaries in Diverse Environments", St.
Remon Cornelisse   +11 more
openaire   +3 more sources

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

open access: yesAdvanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu   +3 more
wiley   +1 more source

Variable Radio Emission of Neutron Star X-Ray Binary Ser X–1 during Its Persistent Soft State

open access: yesThe Astrophysical Journal
Ser X–1 is a low-mass neutron star X-ray binary and has been persistently accreting since its discovery in the 1960s. It has always been observed to be in a soft spectral state and has never showed substantial long-term X-ray variability. Ser X–1 has one
Eli C. Pattie   +5 more
doaj   +1 more source

The bottom magnetic field and magnetosphere evolution of neutron star in low-mass X-ray binary [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2006
8 pages, 4 figs, accepted by MNRAS ...
Yasufumi Kojima, Cheng-Min Zhang
openaire   +3 more sources

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