Results 71 to 80 of about 14,620 (167)

Quenching and Recovery of Persistent X-Ray Emission during a Superburst in 4U 1820–30

The Astrophysical Journal
We report the superburst from 4U 1820–30 in 2021 observed by the Monitor of All-sky X-ray Image and Neutron star Interior Composition Explorer (NICER).
Zhijiao Peng, Zhaosheng Li, Yuanyue Pan, Tao Fu, Wenhui Yu, Yupeng Chen, Shu Zhang, Maurizio Falanga, Shuang-Nan Zhang   +8 more
doaj   +1 more source

Observations of the X-Ray Millihertz Quasiperiodic Oscillations in Hercules X-1

The Astrophysical Journal
With a systematic timing investigation of the persistent X-ray binary pulsar Her X-1 based on a large number of Insight-HXMT observations between 2017 and 2019, we confirm the presence of X-ray millihertz quasiperiodic oscillations (mHz QPOs) at ∼0.01 Hz.
Wen Yang, Wei Wang
doaj   +1 more source

X-ray observations of isolated neutron stars

Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources XIV — PoS(MULTIF2023)
Pulsars are rapidly spinning neutron stars, that radiate at the expense of their strong magnetic field and their high surface temperature. Five decades of multi-wavelength observations showed a large variety of physical parameters, such as the spin period, the magnetic field and the age, and of observational properties, especially in the radio and X ...
openaire   +3 more sources

Mass–Radius Constraints for 2S 0918–549 from an RXTE Superexpansion Burst: A Direct Cooling-tail Analysis

The Astrophysical Journal
Thermonuclear (Type I) X-ray bursts from accreting neutron stars (NSs) offer a means to determine NS mass ( M ) and radius ( R ) and thereby probe the properties of matter at supranuclear density.
Hongbin Fan, Helei Liu, Zhaosheng Li, Yupeng Chen, Shoutao Ban, Guoliang Lü, Akira Dohi, Chunhua Zhu, Renxin Xu   +8 more
doaj   +1 more source

Discovery of Burst Oscillations in the Newly Discovered Millisecond X-Ray Pulsar SRGA J144459.2–604207

The Astrophysical Journal
Burst oscillations during thermonuclear X-ray bursts are powered by thermonuclear energy on the neutron star (NS) surface and typically occur close to the spin frequency of the NS.
Manoj Mandal, Sachindra Naik
doaj   +1 more source

Pulsing X-ray stars [PDF]

Nature, 1975
openaire   +1 more source

Stochastic analysis of compact stars under composite polytropes. [PDF]

Sci Rep
Nouh MI, El-Essawy SH, Foda MM, Aboueisha MS.   +3 more
europepmc   +1 more source

Decoding THz-Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks. [PDF]

Adv Mater
Li X, Ross A, Stoica VA, Das S, Hazra S, Wang HH, Padma H, Hoffmann MC, Kramer P, Song S, Nelson S, Sato T, Zhu D, Ramesh R, Martin LW, Cao Y, Freeland JW, Lindenberg AM, Wen H, Chen LQ, Gopalan V.   +20 more
europepmc   +1 more source

Evaluating the combined effect of a biomimetic organic matrix and bioinspired fluorapatite nanoparticles on initial caries lesions. [PDF]

RSC Adv
El-Sharkawy RM, Hanafy RA, Alghonemy WY, Abdelfatah OM, Salem EM.   +4 more
europepmc   +1 more source

What are X-Ray Stars? [PDF]

Nature, 1968
openaire   +1 more source