The University of Southampton
University of Southampton Institutional Repository

A persistent disk wind in GRS 1915+105 with NICER

A persistent disk wind in GRS 1915+105 with NICER
A persistent disk wind in GRS 1915+105 with NICER

The bright, erratic black hole X-ray binary GRS 1915+105 has long been a target for studies of disk instabilities, radio/infrared jets, and accretion disk winds, with implications that often apply to sources that do not exhibit its exotic X-ray variability. With the launch of the Neutron star Interior Composition Explorer (NICER), we have a new opportunity to study the disk wind in GRS 1915+105 and its variability on short and long timescales. Here we present our analysis of 39 NICER observations of GRS 1915+105 collected during five months of the mission data validation and verification phase, focusing on Fe xxv and Fe xxvi absorption. We report the detection of strong Fe xxvi in 32 (>80%) of these observations, with another four marginal detections; Fe xxv is less common, but both likely arise in the well-known disk wind. We explore how the properties of this wind depend on broad characteristics of the X-ray lightcurve: mean count rate, hardness ratio, and fractional rms variability. The trends with count rate and rms are consistent with an average wind column density that is fairly steady between observations but varies rapidly with the source on timescales of seconds. The line dependence on spectral hardness echoes the known behavior of disk winds in outbursts of Galactic black holes; these results clearly indicate that NICER is a powerful tool for studying black hole winds.

accretion, accretion disks, black hole physics, stars: winds, outflows
2041-8205
Neilsen, J.
08c1d837-abeb-4a7d-bf2a-3a0fc6479110
Cackett, Edward M.
db500756-c971-444b-9677-4ee742b2dac5
Remillard, R.A.
87600a84-66cb-400a-97d2-f61e7a7206c3
Homan, J.
549baf32-2442-4247-824e-21bb018b05f5
Steiner, J.F.
9001e118-7c30-4295-af66-7ce9c3a3701b
Gendreau, K.
5749fe9f-0e85-45da-a97d-32924bed3a2e
Arzoumanian, Z.
5befbba6-f6a1-47c8-ae9e-021c5d854a64
Prigozhin, G.
2ddfd21c-ec49-4ba1-a830-d9f7de3d79ad
Lamarr, B.
68dda03a-91c3-4df0-bb57-9c3035d3a80d
Doty, J.
4e51d602-ac48-481e-80fa-15af7d8292f4
Eikenberry, S.
1e439ded-8c26-4664-809a-e817020237c3
Tombesi, F.
19c0ea2c-a857-489c-8218-c57a1d57a24e
Ludlam, R.
14eb530f-6cbb-4886-8f0f-ef7f1bc34c32
Kara, E.
a6b6581e-1ab3-4d8a-a65d-7625990f8e35
Altamirano, D.
d5ccdb09-0b71-4303-9538-05b467be075b
Fabian, A.C.
b9bef0bc-2ecd-49dc-ab2b-954cabea88ba
Neilsen, J.
08c1d837-abeb-4a7d-bf2a-3a0fc6479110
Cackett, Edward M.
db500756-c971-444b-9677-4ee742b2dac5
Remillard, R.A.
87600a84-66cb-400a-97d2-f61e7a7206c3
Homan, J.
549baf32-2442-4247-824e-21bb018b05f5
Steiner, J.F.
9001e118-7c30-4295-af66-7ce9c3a3701b
Gendreau, K.
5749fe9f-0e85-45da-a97d-32924bed3a2e
Arzoumanian, Z.
5befbba6-f6a1-47c8-ae9e-021c5d854a64
Prigozhin, G.
2ddfd21c-ec49-4ba1-a830-d9f7de3d79ad
Lamarr, B.
68dda03a-91c3-4df0-bb57-9c3035d3a80d
Doty, J.
4e51d602-ac48-481e-80fa-15af7d8292f4
Eikenberry, S.
1e439ded-8c26-4664-809a-e817020237c3
Tombesi, F.
19c0ea2c-a857-489c-8218-c57a1d57a24e
Ludlam, R.
14eb530f-6cbb-4886-8f0f-ef7f1bc34c32
Kara, E.
a6b6581e-1ab3-4d8a-a65d-7625990f8e35
Altamirano, D.
d5ccdb09-0b71-4303-9538-05b467be075b
Fabian, A.C.
b9bef0bc-2ecd-49dc-ab2b-954cabea88ba

Neilsen, J., Cackett, Edward M., Remillard, R.A., Homan, J., Steiner, J.F., Gendreau, K., Arzoumanian, Z., Prigozhin, G., Lamarr, B., Doty, J., Eikenberry, S., Tombesi, F., Ludlam, R., Kara, E., Altamirano, D. and Fabian, A.C. (2018) A persistent disk wind in GRS 1915+105 with NICER. The Astrophysical Journal Letters, 860 (2), [L19]. (doi:10.3847/2041-8213/aaca96).

Record type: Article

Abstract

The bright, erratic black hole X-ray binary GRS 1915+105 has long been a target for studies of disk instabilities, radio/infrared jets, and accretion disk winds, with implications that often apply to sources that do not exhibit its exotic X-ray variability. With the launch of the Neutron star Interior Composition Explorer (NICER), we have a new opportunity to study the disk wind in GRS 1915+105 and its variability on short and long timescales. Here we present our analysis of 39 NICER observations of GRS 1915+105 collected during five months of the mission data validation and verification phase, focusing on Fe xxv and Fe xxvi absorption. We report the detection of strong Fe xxvi in 32 (>80%) of these observations, with another four marginal detections; Fe xxv is less common, but both likely arise in the well-known disk wind. We explore how the properties of this wind depend on broad characteristics of the X-ray lightcurve: mean count rate, hardness ratio, and fractional rms variability. The trends with count rate and rms are consistent with an average wind column density that is fairly steady between observations but varies rapidly with the source on timescales of seconds. The line dependence on spectral hardness echoes the known behavior of disk winds in outbursts of Galactic black holes; these results clearly indicate that NICER is a powerful tool for studying black hole winds.

Text
A PERSISTENT DISK WIND IN GRS 1915+105 WITH NICER - Accepted Manuscript
Download (408kB)

More information

Accepted/In Press date: 4 June 2018
e-pub ahead of print date: 18 June 2018
Published date: 20 June 2018
Additional Information: author Altamirano confirmed Arxiv record 1806.02342 is AM.
Keywords: accretion, accretion disks, black hole physics, stars: winds, outflows

Identifiers

Local EPrints ID: 422641
URI: http://eprints.soton.ac.uk/id/eprint/422641
ISSN: 2041-8205
PURE UUID: 3757bd8b-279a-40cb-9937-ccaea501de51
ORCID for D. Altamirano: ORCID iD orcid.org/0000-0002-3422-0074

Catalogue record

Date deposited: 27 Jul 2018 16:30
Last modified: 10 Dec 2019 05:17

Export record

Altmetrics

Contributors

Author: J. Neilsen
Author: Edward M. Cackett
Author: R.A. Remillard
Author: J. Homan
Author: J.F. Steiner
Author: K. Gendreau
Author: Z. Arzoumanian
Author: G. Prigozhin
Author: B. Lamarr
Author: J. Doty
Author: S. Eikenberry
Author: F. Tombesi
Author: R. Ludlam
Author: E. Kara
Author: D. Altamirano ORCID iD
Author: A.C. Fabian

University divisions

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.

×