Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Salmi, Tuomo"'
Autor:
Malacaria, Christian, Papitto, Alessandro, Campana, Sergio, Di Marco, Alessandro, Di Salvo, Tiziana, Baglio, Maria Cristina, Illiano, Giulia, La Placa, Riccardo, Zanon, Arianna Miraval, Pilia, Maura, Poutanen, Juri, Salmi, Tuomo, Sanna, Andrea, Mandal, Manoj
Accreting millisecond pulsars (AMSPs) are excellent laboratories to study reflection spectra and their features from an accretion disk truncated by a rapidly rotating magnetosphere near the neutron star surface. These systems also exhibit thermonucle
Externí odkaz:
http://arxiv.org/abs/2502.08239
Pulse profile modelling using X-ray data from NICER permits the inference of mass and radius for rotation-powered millisecond pulsars. This in turn constrains the equation of state of cold dense matter. Previous studies indicate that the uncertainty
Externí odkaz:
http://arxiv.org/abs/2502.07471
Autor:
Salmi, Tuomo, Dorsman, Bas, Watts, Anna L., Bobrikova, Anna, Di Marco, Alessandro, Loktev, Vladislav, Papitto, Alessandro, Pilia, Maura, Poutanen, Juri, Rankin, John
We present an analysis of polarized X-ray pulses based on simulated data for accreting millisecond pulsars (AMPs). We used the open-source X-ray Pulse Simulation and Inference code (previously applied to NICER observations), that we upgraded to allow
Externí odkaz:
http://arxiv.org/abs/2501.12190
The pulsed X-ray emission from the neutron star surface acts as a window to study the state of matter in the neutron star interior. For accreting millisecond pulsars, the surface X-ray emission is generated from the `hotspots', which are formed as a
Externí odkaz:
http://arxiv.org/abs/2411.16528
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, Ismaël, Guillemot, Lucas, Theureau, Gilles, Kerr, Matthew
Publikováno v:
ApJ 976 58 (2024)
Recent constraints on neutron star mass and radius have advanced our understanding of the equation of state (EOS) of cold dense matter. Some of them have been obtained by modeling the pulses of three millisecond X-ray pulsars observed by the Neutron
Externí odkaz:
http://arxiv.org/abs/2409.14923
Autor:
Dorsman, Bas, Salmi, Tuomo, Watts, Anna L., Ng, Mason, Kamath, Satish, Bobrikova, Anna, Poutanen, Juri, Loktev, Vladislav, Kini, Yves, Choudhury, Devarshi, Vinciguerra, Serena, Bogdanov, Slavko, Chakrabarty, Deepto
Pulse profile modelling (PPM) is a technique for inferring mass, radius and hotspot properties of millisecond pulsars. PPM is now regularly used for analysis of rotation-powered millisecond pulsars (RMPs) with data from the Neutron Star Interior Comp
Externí odkaz:
http://arxiv.org/abs/2409.07908
Autor:
Papitto, Alessandro, Di Marco, Alessandro, Poutanen, Juri, Salmi, Tuomo, Illiano, Giulia, La Monaca, Fabio, Ambrosino, Filippo, Bobrikova, Anna, Baglio, Maria Cristina, Ballocco, Caterina, Burderi, Luciano, Campana, Sergio, Zelati, Francesco Coti, Di Salvo, Tiziana, La Placa, Riccardo, Loktev, Vladislav, Long, Sinan, Malacaria, Christian, Zanon, Arianna Miraval, Ng, Mason, Pilia, Maura, Sanna, Andrea, Stella, Luigi, Strohmayer, Tod, Zane, Silvia
Publikováno v:
A&A 694, A37 (2025)
We report on the discovery of polarized X-ray emission from an accreting millisecond pulsar. During a 10-day-long coverage of the February 2024 outburst of SRGA J144459.2-604207, the Imaging X-ray Polarimetry Explorer (IXPE) detected an average polar
Externí odkaz:
http://arxiv.org/abs/2408.00608
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:
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