Results 21 to 30 of about 101,445 (253)

Optical Spectroscopy and Demographics of Redback Millisecond Pulsar Binaries [PDF]

Astrophysical Journal, 2018
We present the first optical spectroscopy of five confirmed (or strong candidate) redback millisecond pulsar binaries, obtaining complete radial velocity curves for each companion star.
J. Strader, S. Swihart, L. Chomiuk, A. Bahramian, Christopher T. Britt, C. C. Cheung, K. Dage, J. Halpern, Kwan-Lok Li, R. Mignani, R. Mignani, J. Orosz, M. Peacock, R. Salinas, L. Shishkovsky, E. Tremou   +15 more
semanticscholar   +1 more source

Fit‐Fat Index is better associated with heart rate variability compared to fitness and fatness alone as indicators of cardiometabolic human health

American Journal of Human Biology, Volume 35, Issue 11, November 2023., 2023
Abstract Objectives Cardiorespiratory fitness and fatness indicators have been related to heart rate variability (HRV) parameters. The Fit‐Fat Index (FFI) is a single index combining cardiorespiratory fitness and fatness indicators. To the best of our knowledge, no studies have previously analyzed whether FFI are related to cardiac autonomic nervous ...
Ginés Navarro‐Lomas, Abel Plaza‐Florido, Alejandro De‐la‐O, Manuel J. Castillo, Francisco J. Amaro‐Gahete   +4 more
wiley   +1 more source

Description and Application of the Surfing Effect

Universe, 2022
The standard technique for very low-frequency gravitational wave detection is mainly based on searching for a specific spatial correlation in the variation of the times of arrival of the radio pulses emitted by millisecond pulsars with respect to a ...
Michele Maiorano, Francesco De Paolis, Achille A. Nucita   +2 more
doaj   +1 more source

Pulsating in Unison at Optical and X-Ray Energies: Simultaneous High Time Resolution Observations of the Transitional Millisecond Pulsar PSR J1023+0038 [PDF]

Astrophysical Journal, 2019
PSR J1023+0038 is the first millisecond pulsar discovered to pulsate in the visible band; such a detection took place when the pulsar was surrounded by an accretion disk and also showed X-ray pulsations.
A. Papitto, F. Ambrosino, L. Stella, D. Torres, F. C. Zelati, A. Ghedina, F. Meddi, A. Sanna, P. Casella, Y. Dallilar, S. Eikenberry, G. Israel, F. Onori, S. Piranomonte, E. Bozzo, L. Burderi, S. Campana, D. Martino, T. Salvo, C. Ferrigno, N. Rea, A. Riggio, S. Serrano, A. Veledina, A. Veledina, A. Veledina, L. Zampieri   +26 more
semanticscholar   +1 more source

Structure and stability of differentially rotating compact stellar objects

Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023
Abstract Depending on the dynamics of a binary neutron star merger, the collision may result in a differentially rotating compact object. Differentially rotating stars can sustain a total mass considerably higher than that of a uniformly rotating star, giving rise to “hypermassive” objects like hypermassive neutron stars.
Delaney Farrell, Rodrigo Negreiros, Fridolin Weber   +2 more
wiley   +1 more source

Timing the Pulsations of the Accreting Millisecond Pulsar SAX J1808.4–3658 during Its 2019 Outburst [PDF]

Astrophysical Journal, 2019
In this paper we present a coherent timing analysis of the 401 Hz pulsations of the accreting millisecond X-ray pulsar SAX J1808.4–3658 during its 2019 outburst. Using observations collected with the Neutron Star Interior Composition Explorer (NICER), we
P. Bult, D. Chakrabarty, Z. Arzoumanian, K. Gendreau, S. Guillot, C. Malacaria, P. Ray, T. Strohmayer   +7 more
semanticscholar   +1 more source

Progress and Challenges in Electromechanical Coupling of Radio Telescopes

International Journal of Antennas and Propagation, Volume 2022, Issue 1, 2022., 2022
Radio astronomy is a discipline of dynamics and wonders. The vast universe has many secrets to unravel. As one of the important facilities in this discipline, radio telescopes play a key role in collecting astronomical data and unraveling mysteries.
Yuefei Yan, Song Xue, Xinlan Hu, Peiyuan Lian, Qian Xu, Na Wang, Wulin Zhao, Yang Wu, Baoyan Duan, Congsi Wang, Mohammad Alibakhshikenari   +10 more
wiley   +1 more source

Precise optical timing of PSR J1023+0038, the first millisecond pulsar detected with Aqueye+ in Asiago [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2019
We report the first detection of an optical millisecond pulsar with the fast photon counter Aqueye+ in Asiago. This is an independent confirmation of the detection of millisecond pulsations from PSR J1023+0038 obtained with SiFAP at the Telescopio ...
L. Zampieri, A. Burtovoi, M. Fiori, G. Naletto, A. Spolon, C. Barbieri, A. Papitto, F. Ambrosino   +7 more
semanticscholar   +1 more source

Electrotherapies for Glioblastoma

Advanced Science, Volume 8, Issue 18, September 22, 2021., 2021
Electrotherapy uses electric fields to target various biological mechanisms for therapeutic outcomes. The current state of intermediate frequency electric fields including tumour‐treating fields, and reversible/irreversible electroporation are discussed in both pre‐clinical and clinical models of glioblastoma.
Elise P. W. Jenkins, Alina Finch, Magda Gerigk, Iasonas F. Triantis, Colin Watts, George G. Malliaras   +5 more
wiley   +1 more source

Face changing companion of the redback millisecond pulsar PSR J1048+2339 [PDF]

Astronomy & Astrophysics, 2019
We present optical observations of the redback millisecond pulsar PSR J1048+2339, which is a 4.66 ms radio pulsar in a compact binary with an orbital period of six hours.
Y. X. Yap, K. L. Li, A. Kong, J. Takata, J. Lee, C. Hui   +5 more
semanticscholar   +1 more source