The University of Southampton
University of Southampton Institutional Repository

A NuSTAR and Swift view of the hard state of MAXI J1813-095

A NuSTAR and Swift view of the hard state of MAXI J1813-095
A NuSTAR and Swift view of the hard state of MAXI J1813-095
We present an analysis of the NuSTAR and Swift spectra of the black hole candidate MAXI J1813-095 in a failed-transition outburst in 2018. The NuSTAR observations show evidence of reflected emission from the inner region of the accretion disc. By modelling the reflection component in the spectra, we find a disc inner radius of Rin<7 rg. This result suggests that either a slightly truncated disc or a non-truncated disc forms at a few percent of the Eddington limit in MAXI J1813-095. Our best-fit reflection models indicate that the geometry of the innermost accretion remains consistent during the period of NuSTAR observations. The spectral variability of MAXI J1813-095 from multi-epoch observations is dominated by the variable photon index of the Comptonisation emission.
0035-8711
Buisson, Douglas
f96b1210-d056-4948-9e4a-deeb669e6d1a
Jiang, Jiachen
95329273-2124-446e-9e16-b7df729367c9
Dauser, Thomas
eb326b59-38f6-475e-9f26-e1c2b40cef82
Fabian, Andrew C.
b9bef0bc-2ecd-49dc-ab2b-954cabea88ba
Fürst, Felix
859045eb-4966-4cea-8f48-28c832d162f3
Gallo, Luigi C.
5dfcbe0c-510c-4220-b724-dc507b4f61a2
Harrison, Fiona A.
d12bd352-3538-4dac-86fb-f13bc5837016
Parker, Michael L.
f0ba6549-3007-4400-ac1c-008d14c1c600
Steiner, James F.
7f446296-425e-4236-9ea7-a7d2694a90b5
Tomsick, John A.
96b2e8cc-70c1-424a-8380-2551a5077ff5
Ubach, Santiago
d01e3332-f31e-464a-9284-d99ffe2e441f
Walton, Dominic J.
3cf6ea78-7dd5-4765-8c09-ba2af76f11e7
Buisson, Douglas
f96b1210-d056-4948-9e4a-deeb669e6d1a
Jiang, Jiachen
95329273-2124-446e-9e16-b7df729367c9
Dauser, Thomas
eb326b59-38f6-475e-9f26-e1c2b40cef82
Fabian, Andrew C.
b9bef0bc-2ecd-49dc-ab2b-954cabea88ba
Fürst, Felix
859045eb-4966-4cea-8f48-28c832d162f3
Gallo, Luigi C.
5dfcbe0c-510c-4220-b724-dc507b4f61a2
Harrison, Fiona A.
d12bd352-3538-4dac-86fb-f13bc5837016
Parker, Michael L.
f0ba6549-3007-4400-ac1c-008d14c1c600
Steiner, James F.
7f446296-425e-4236-9ea7-a7d2694a90b5
Tomsick, John A.
96b2e8cc-70c1-424a-8380-2551a5077ff5
Ubach, Santiago
d01e3332-f31e-464a-9284-d99ffe2e441f
Walton, Dominic J.
3cf6ea78-7dd5-4765-8c09-ba2af76f11e7

Buisson, Douglas, Jiang, Jiachen, Dauser, Thomas, Fabian, Andrew C., Fürst, Felix, Gallo, Luigi C., Harrison, Fiona A., Parker, Michael L., Steiner, James F., Tomsick, John A., Ubach, Santiago and Walton, Dominic J. (2022) A NuSTAR and Swift view of the hard state of MAXI J1813-095. Monthly Notices of the Royal Astronomical Society. (In Press)

Record type: Article

Abstract

We present an analysis of the NuSTAR and Swift spectra of the black hole candidate MAXI J1813-095 in a failed-transition outburst in 2018. The NuSTAR observations show evidence of reflected emission from the inner region of the accretion disc. By modelling the reflection component in the spectra, we find a disc inner radius of Rin<7 rg. This result suggests that either a slightly truncated disc or a non-truncated disc forms at a few percent of the Eddington limit in MAXI J1813-095. Our best-fit reflection models indicate that the geometry of the innermost accretion remains consistent during the period of NuSTAR observations. The spectral variability of MAXI J1813-095 from multi-epoch observations is dominated by the variable photon index of the Comptonisation emission.

Text
2205.08227 - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 15 May 2022
Additional Information: arXiv:2205.08227

Identifiers

Local EPrints ID: 468546
URI: http://eprints.soton.ac.uk/id/eprint/468546
ISSN: 0035-8711
PURE UUID: d0e5e6e8-1bfe-4e6e-abbc-cd647eed4c9a

Catalogue record

Date deposited: 17 Aug 2022 17:15
Last modified: 23 Nov 2022 17:48

Export record

Contributors

Author: Douglas Buisson
Author: Jiachen Jiang
Author: Thomas Dauser
Author: Andrew C. Fabian
Author: Felix Fürst
Author: Luigi C. Gallo
Author: Fiona A. Harrison
Author: Michael L. Parker
Author: James F. Steiner
Author: John A. Tomsick
Author: Santiago Ubach
Author: Dominic J. Walton

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×