Zobrazeno 1 - 10
of 188
pro vyhledávání: '"Guillot, Sebastien"'
Autor:
Corbet, Robin H. D., Ballhausen, Ralf, Becker, Peter A., Coley, Joel B., Fuerst, Felix, Gendreau, Keith C., Guillot, Sebastien, Islam, Nazma, Jaisawal, Gaurava Kumar, Jenke, Peter, Kretschmar, Peter, Lange, Alexander, Malacaria, Christian, Ng, Mason, Pottschmidt, Katja, Pradhan, Pragati, Ray, Paul S., Rothschild, Richard E., Thalhammer, Philipp, Townsend, Lee J., Wilms, Joern, Wilson-Hodge, Colleen A., Wolff, Michael T.
XTE J1829-098 is a transient X-ray pulsar with a period of ~7.8 s. It is a candidate Be star system, although the evidence for this is not yet definitive. We investigated the twenty-year long X-ray light curve using the Rossi X-ray Timing Explorer Pr
Externí odkaz:
http://arxiv.org/abs/2410.03500
Autor:
Salmi, Tuomo, Deneva, Julia S., Ray, Paul S., Watts, Anna L., Choudhury, Devarshi, Kini, Yves, Vinciguerra, Serena, Cromartie, H. Thankful, Wolff, Michael T., Arzoumanian, Zaven, Bogdanov, Slavko, Gendreau, Keith, Guillot, Sebastien, Ho, Wynn C. G., Morsink, Sharon M., Cognard, Ismael, Guillemot, Lucas, Theureau, Gilles, Kerr, Matthew
Recent constraints on neutron star mass and radius have advanced our understanding of the equation of state of cold dense matter. Some of them have been obtained by modeling the pulses of three millisecond X-ray pulsars observed by the Neutron Star I
Externí odkaz:
http://arxiv.org/abs/2409.14923
Publikováno v:
A&A 690, A317 (2024)
Context. Inferring spectral parameters from X-ray data is one of the cornerstones of high-energy astrophysics, and is achieved using software stacks that have been developed over the last twenty years and more. However, as models get more complex and
Externí odkaz:
http://arxiv.org/abs/2409.05757
Autor:
Rutherford, Nathan, Mendes, Melissa, Svensson, Isak, Schwenk, Achim, Watts, Anna L., Hebeler, Kai, Keller, Jonas, Prescod-Weinstein, Chanda, Choudhury, Devarshi, Raaijmakers, Geert, Salmi, Tuomo, Timmerman, Patrick, Vinciguerra, Serena, Guillot, Sebastien, Lattimer, James M.
Publikováno v:
ApJ Letters, 971, L19 (2024)
Pulse profile modeling of X-ray data from NICER is now enabling precision inference of neutron star mass and radius. Combined with nuclear physics constraints from chiral effective field theory ($\chi$EFT), and masses and tidal deformabilities inferr
Externí odkaz:
http://arxiv.org/abs/2407.06790
Autor:
Choudhury, Devarshi, Salmi, Tuomo, Vinciguerra, Serena, Riley, Thomas E., Kini, Yves, Watts, Anna L., Dorsman, Bas, Bogdanov, Slavko, Guillot, Sebastien, Ray, Paul S., Reardon, Daniel J., Remillard, Ronald A., Bilous, Anna V., Huppenkothen, Daniela, Lattimer, James M., Rutherford, Nathan, Arzoumanian, Zaven, Gendreau, Keith C., Morsink, Sharon M., Ho, Wynn C. G.
We report Bayesian inference of the mass, radius and hot X-ray emitting region properties - using data from the Neutron Star Interior Composition ExploreR (NICER) - for the brightest rotation-powered millisecond X-ray pulsar PSR J0437$\unicode{x2013}
Externí odkaz:
http://arxiv.org/abs/2407.06789
Autor:
Dittmann, Alexander J., Miller, M. Coleman, Lamb, Frederick K., Holt, Isiah, Chirenti, Cecilia, Wolff, Michael T., Bogdanov, Slavko, Guillot, Sebastien, Ho, Wynn C. G., Morsink, Sharon M., Arzoumanian, Zaven, Gendreau, Keith C.
PSR J0740+6620 is the neutron star with the highest precisely determined mass, inferred from radio observations to be $2.08\pm0.07\,\rm M_\odot$. Measurements of its radius therefore hold promise to constrain the properties of the cold, catalyzed, hi
Externí odkaz:
http://arxiv.org/abs/2406.14467
Autor:
Salmi, Tuomo, Choudhury, Devarshi, Kini, Yves, Riley, Thomas E., Vinciguerra, Serena, Watts, Anna L., Wolff, Michael T., Arzoumanian, Zaven, Bogdanov, Slavko, Chakrabarty, Deepto, Gendreau, Keith, Guillot, Sebastien, Ho, Wynn C. G., Huppenkothen, Daniela, Ludlam, Renee M., Morsink, Sharon M., Ray, Paul S.
Publikováno v:
ApJ 974 294 (2024)
We report an updated analysis of the radius, mass, and heated surface regions of the massive pulsar PSR J0740+6620 using Neutron Star Interior Composition Explorer (NICER) data from 2018 September 21 to 2022 April 21, a substantial increase in data s
Externí odkaz:
http://arxiv.org/abs/2406.14466
Autor:
Choudhury, Devarshi, Watts, Anna L., Dittmann, Alexander J., Miller, M. Coleman, Morsink, Sharon M., Salmi, Tuomo, Vinciguerra, Serena, Bogdanov, Slavko, Guillot, Sebastien, Wolff, Michael T., Arzoumanian, Zaven
Publikováno v:
ApJ 975 202 (2024)
Pulse Profile Modeling (PPM), the technique used to infer mass, radius and geometric parameters for rotation-powered millisecond pulsars using data from the Neutron Star Interior Composition Explorer (NICER), relies on relativistic ray-tracing of the
Externí odkaz:
http://arxiv.org/abs/2406.07285
Autor:
Ng, Mason, Ray, Paul S., Sanna, Andrea, Strohmayer, Tod E., Papitto, Alessandro, Illiano, Giulia, Albayati, Arianna C., Altamirano, Diego, Boztepe, Tuğba, Güver, Tolga, Chakrabarty, Deepto, Arzoumanian, Zaven, Buisson, D. J. K., Ferrara, Elizabeth C., Gendreau, Keith C., Guillot, Sebastien, Hare, Jeremy, Jaisawal, Gaurava K., Malacaria, Christian, Wolff, Michael T.
We present the discovery, with the Neutron Star Interior Composition Explorer (NICER), that SRGA J144459.2-604207 is a 447.9 Hz accreting millisecond X-ray pulsar (AMXP), which underwent a four-week long outburst starting on 2024 February 15. The AMX
Externí odkaz:
http://arxiv.org/abs/2405.00087
Autor:
Hu, Chin-Ping, Narita, Takuto, Enoto, Teruaki, Younes, George, Wadiasingh, Zorawar, Baring, Matthew G., Ho, Wynn C. G., Guillot, Sebastien, Ray, Paul S., Guver, Tolga, Rajwade, Kaustubh, Arzoumanian, Zaven, Kouveliotou, Chryssa, Harding, Alice K., Gendreau, Keith C.
Magnetars are neutron stars with extremely high magnetic fields that exhibit various X-ray phenomena such as sporadic sub-second bursts, long-term persistent flux enhancements, and variable rates of rotation period change. In 2020, a fast radio burst
Externí odkaz:
http://arxiv.org/abs/2402.09291