Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Srimanta Banerjee"'
Autor:
Andrzej A. Zdziarski, Swadesh Chand, Srimanta Banerjee, Michał Szanecki, Agnieszka Janiuk, Piotr Lubiński, Andrzej Niedźwiecki, Gulab Dewangan, Ranjeev Misra
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 1, p L9 (2024)
We perform a detailed study of the black hole spin of Cyg X-1, using accurate broadband X-ray data obtained in the soft spectral state by simultaneous NICER and NuSTAR observations, supplemented at high energies by INTEGRAL data. We use the relativis
Externí odkaz:
https://doaj.org/article/465a96034a854ebb9192841dd49b2edd
Autor:
Srimanta Banerjee, Gulab C. Dewangan, Christian Knigge, Maria Georganti, Poshak Gandhi, N. P. S. Mithun, Payaswini Saikia, Dipankar Bhattacharya, David M. Russell, Fraser Lewis, Andrzej A. Zdziarski
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 189 (2024)
We present a comprehensive multiwavelength spectral analysis of the black hole (BH) X-ray binary MAXI J1820+070 during its 2018 outburst, utilizing AstroSat far-UV, soft X-ray, and hard X-ray data, along with (quasi-)simultaneous optical and X-ray da
Externí odkaz:
https://doaj.org/article/92dfc355b4fc486aa80a0959da6de84c
Autor:
Andrzej A. Zdziarski, Srimanta Banerjee, Swadesh Chand, Gulab Dewangan, Ranjeev Misra, Michał Szanecki, Andrzej Niedźwiecki
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 101 (2024)
The black hole spin parameter, a _* , was measured to be close to its maximum value of 1 in many accreting X-ray binaries. In particular, a _* ≳ 0.9 was found in a number of studies of LMC X-1. These measurements were claimed to take into account b
Externí odkaz:
https://doaj.org/article/434a11dfb814482db6daebc3008649b9
A fundamental difference between a neutron star (NS) and a black hole (BH) is the absence of a physical surface in the latter. For this reason, any remaining kinetic energy of the matter accreting onto a BH is advected inside its event horizon. In th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ad3b01c1090cdcc98196e1b066ca195
http://arxiv.org/abs/2009.07222
http://arxiv.org/abs/2009.07222
A thin viscous accretion disc around a Kerr black hole, which is warped due to the Lense-Thirring (LT) effect, was shown to cause the spin axis of the black hole to precess and align with the outer disc. We calculate the total LT torque acting on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a5e4c7738e30a99be0de9b22e9b3382
http://arxiv.org/abs/1905.12858
http://arxiv.org/abs/1905.12858
Publikováno v:
The Astrophysical Journal. 870:95
The inner part of a thin accretion disk around a Kerr black hole can serve as an important tool to study the physics of the strong gravity regime. A tilt in such a disk with respect to the black hole spin axis is particularly useful for this purpose,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88bc34219120aebe17ab4d1daf7a26c9
https://doi.org/10.3847/1538-4357/aaf102
https://doi.org/10.3847/1538-4357/aaf102
We have earlier proposed a fourth order gravity model as a possible explanation for late time cosmic acceleration, and for flattened galaxy rotation curves. The model has a free length parameter whose value depends on the scale of the system under st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bf6cd2b71ad8dcce9be51d73e70e3d9
http://arxiv.org/abs/1601.02357
http://arxiv.org/abs/1601.02357
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2017:004-004
Modified gravity theories can introduce modifications to the Poisson equation in the Newtonian limit. As a result, we expect to see interesting features of these modifications inside stellar objects. White dwarf stars are one of the most well studied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90323a70c6227c887ac320614fc7d390
https://doi.org/10.1088/1475-7516/2017/10/004
https://doi.org/10.1088/1475-7516/2017/10/004
Publikováno v:
Astrophysical Journal; 1/10/2019, Vol. 870 Issue 2, p1-1, 1p