Výsledky vyhledávání - "Susmita Chakravorty"

The auto- and cross-angular power spectrum of the Cas A supernova remnant in radio and X-ray

Autor: Nirupam Roy, Hans Moritz Günther, Preetha Saha, Somnath Bharadwaj, Susmita Chakravorty, Randall K. Smith, Samir Choudhuri

Publikováno v: Monthly Notices of the Royal Astronomical Society. 502:5313-5324

The shell type supernova remnant (SNR) Cas A exhibits structures at nearly all angular scales. Previous studies show the angular power spectrum $(C_{\ell})$ of the radio emission to be a broken power law, consistent with MHD turbulence. The break has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95a5a7070b273d010f2de8052b6017b9
https://doi.org/10.1093/mnras/stab446

Zobrazit plný text záznamu

Expected evolution of disk wind properties along an X-ray binary outburst

Autor: S. Barnier, R. Belmont, P.-O. Petrucci, J. L. Rodriguez, Mickael Coriat, Maïca Clavel, Stefano Bianchi, Jorge Ferreira, Grégoire Marcel, Gilles Henri, Floriane Cangemi, Susmita Chakravorty, Julien Malzac, Gabriele Ponti, Stephane Corbel

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 649, pp.A128. ⟨10.1051/0004-6361/202039524⟩
Astronomy and Astrophysics-A&A, 2021, 649, pp.A128. ⟨10.1051/0004-6361/202039524⟩
Astronomy & Astrophysics

Blueshifted X-ray absorption lines (preferentially from Fe XXV and Fe XXVI present in the 6-8 keV range) indicating the presence of massive hot disk winds in black hole (BH) X-ray binaries (XrB) are most generally observed during soft states. It has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::182dfb43476fdb1f35cd1455ededc454
https://hal.archives-ouvertes.fr/hal-03441821

Zobrazit plný text záznamu

Hyper-massive Black Holes have Faint Broad and Narrow Emission Lines

Autor: Gary J. Ferland, Harshitha K Bhat, Susmita Chakravorty, Caroline Bertemes, Dhrubojyoti Sengupta, Sudeb Ranjan Datta, Nirupam Roy, Savithri H. Ezhikode, Martin Elvis

The EUV provides most of the ionization that creates the high equivalent width (EW) broad and narrow emission lines (BELs, NELs) of quasars. Spectra of Hypermassive Schwarzschild black holes (HMBHs, $M_{BH} \geq 10^{10} M_{\odot}$) with $\alpha$-disc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca682cf3ea48fecb868a8470f30340cc

Zobrazit plný text záznamu

Warm absorbers in X-rays (WAX), a comprehensive high-resolution grating spectral study of a sample of Seyfert Galaxies – II. Warm absorber dynamics and feedback to galaxies

Autor: Ajit K. Kembhavi, Gulab C. Dewangan, Sibasish Laha, Susmita Chakravorty, Matteo Guainazzi

Publikováno v: Monthly Notices of the Royal Astronomical Society. 457:3896-3911

This paper is a sequel to the extensive study of warm absorber (WA) in X-rays carried out using high resolution grating spectral data from XMM-Newton satellite (WAX-I). Here we discuss the global dynamical properties as well as the energetics of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8362445eef464d03483033e37b9ad800
https://doi.org/10.1093/mnras/stw211

Zobrazit plný text záznamu

A unified accretion-ejection paradigm for black hole X-ray binaries. II. Observational signatures of jet-emitting disks

Autor: Jonathan Ferreira, R. Belmont, Juan J. Rodriguez, P.-O. Petrucci, Stephane Corbel, S. Drappeau, A. Loh, Julien Malzac, Mickael Coriat, G. Marcel, Maïca Clavel, Susmita Chakravorty, G. Henri

Publikováno v: Astron.Astrophys.
Astron.Astrophys., 2018, 615, pp.A57. ⟨10.1051/0004-6361/201732069⟩
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2018, 615, pp.A57. ⟨10.1051/0004-6361/201732069⟩
NASA Astrophysics Data System
Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 615, pp.A57. ⟨10.1051/0004-6361/201732069⟩

We elaborate on the paradigm proposed in Ferreira et al. (2006), where the increase and decrease in the disk accretion rate is accompanied by a modification of the disk magnetization $��\propto B_z^2/\dot{m}_{in}$, which in turn determines the do

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8258798e53df530707626761a7051d26
https://hal.archives-ouvertes.fr/hal-01758760

Zobrazit plný text záznamu

The Ultra-Fast Outflow of the Quasar PG 1211+143 as Viewed by Time-Averaged Chandra Grating Spectroscopy

Autor: Joseph Neilsen, Randall K. Smith, Taotao Fang, Martin J. Hardcastle, Andrew J. Young, Susmita Chakravorty, Julia C. Lee, Gerard A. Kriss, Ashkbiz Danehkar, Farid Rahoui, Michael A. Nowak

Publikováno v: Danehkar, A, Nowak, M A, Lee, J C, Kriss, G A, Young, A J, Hardcastle, M J, Chakravorty, S, Fang, T, Neilsen, J, Rahoui, F & Smith, R K 2018, ' The Ultra-fast Outflow of the Quasar PG 1211+143 as Viewed by Time-averaged Chandra Grating Spectroscopy ', Astrophysical Journal, vol. 853, no. 2, 165 . https://doi.org/10.3847/1538-4357/aaa427

We present a detailed X-ray spectral study of the quasar PG 1211+143 based on Chandra High Energy Transmission Grating Spectrometer (HETGS) observations collected in a multi-wavelength campaign with UV data using the Hubble Space Telescope Cosmic Ori

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df2b37e992497dc81726dad4df8e916f
http://arxiv.org/abs/1712.07118

Zobrazit plný text záznamu

Evolution of the reverberation lag in GX 339-4 at the end of an outburst

Autor: Andrzej A. Zdziarski, Francesco Ursini, Julien Malzac, Susmita Chakravorty, Gilles Henri, Stephane Corbel, B. De Marco, R. Belmont, S. Drappeau, Gabriele Ponti, Maïca Clavel, J. L. Rodriguez, Mickael Coriat, Jorge Ferreira, John A. Tomsick, P.-O. Petrucci

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, ⟨10.1093/mnras/stx1649⟩
Monthly Notices of the Royal Astronomical Society, 2017, 471 (2), pp.1475-1487. ⟨10.1093/mnras/stx1649⟩
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2017, 471 (2), pp.1475-1487. ⟨10.1093/mnras/stx1649⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2016, 000, pp.1-14
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 471 (2), pp.1475-1487. ⟨10.1093/mnras/stx1649⟩
Mon.Not.Roy.Astron.Soc., 2017, 471 (2), pp.1475-1487. 〈10.1093/mnras/stx1649〉

We studied X-ray reverberation lags in the BHXRB GX 339-4 at the end of the 2014-2015 outburst. We analysed data from a XMM-Newton campaign covering the end of the transition from the soft to the hard state, and the decrease of luminosity in the hard

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34fee2c953c3179e472918f31eff2477
https://hal.archives-ouvertes.fr/hal-03022138

Zobrazit plný text záznamu

Dark jets in the soft X-ray state of black hole binaries?

Autor: R. Belmont, Gilles Henri, Susmita Chakravorty, T. M. Belloni, Mickael Coriat, S. Drappeau, J. L. Rodriguez, P.-O. Petrucci, Julien Malzac, Jorge Ferreira, Poshak Gandhi, Maïca Clavel, Stephane Corbel

Publikováno v: Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2017, 466 (4), pp.4272-4278. ⟨10.1093/mnras/stw3277⟩
Mon.Not.Roy.Astron.Soc., 2017, 466 (4), pp.4272-4278. 〈10.1093/mnras/stw3277〉
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2017, 466 (4), pp.4272-4278. ⟨10.1093/mnras/stw3277⟩
Monthly Notices of the Royal Astronomical Society, 2017, 466 (4), pp.4272-4278. ⟨10.1093/mnras/stw3277⟩

X-ray binary observations led to the interpretation that powerful compact jets, produced in the hard state, are quenched when the source transitions to its soft state. The aim of this paper is to discuss the possibility that a powerful dark jet is st

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a958edd0dfdf1d1cca87be2bf164056f
https://hal.archives-ouvertes.fr/hal-01554842

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání