The University of Southampton
University of Southampton Institutional Repository

Hard X-ray properties of magnetic cataclysmic variables

Hard X-ray properties of magnetic cataclysmic variables
Hard X-ray properties of magnetic cataclysmic variables
Hard X-ray surveys have proven remarkably efficient in detecting intermediate polars and asynchronous polars, two of the rarest type of cataclysmic variable (CV). Here, we present a global study of hard X-ray-selected intermediate polars and asynchronous polars, focusing particularly on the link between hard X-ray properties and spin/orbital periods. To this end, we first construct a new sample of these objects by cross-correlating candidate sources detected in INTEGRAL/IBIS observations against catalogues of known CVs. We find 23 CV matches, and also present an additional nine (of which three are definite) likely magnetic cataclysmic variables (mCVs) identified by others through optical follow-ups of IBIS detections. We also include in our analysis hard X-ray observations from the Swift/BAT and SUZAKU/HXD in order to make our study more complete. We find that most hard X-ray-detected mCVs have Pspin/Porb < 0.1 above the period gap. In this respect, we also point out the very low number of detected systems in any band between Pspin/Porb= 0.3 and Pspin/Porb= 1 and the apparent peak of the Pspin/Porb distribution at about 0.1. The observational features of the Pspin–Porb plane are discussed in the context of mCV evolution scenarios. We also present for the first time evidence for correlations between hard X-ray spectral hardness and Pspin, Porb and Pspin/Porb . An attempt to explain the observed correlations is made in the context of mCV evolution and accretion footprint geometries on the white dwarf surface.

surveys, novae, cataclysmic variables, gamma-rays, observations, x-rays, binaries
0035-8711
2207-2218
Scaringi, S.
5a05d9eb-9bfb-455a-abb1-b1ed3229f977
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Norton, A.J.
fe7d8253-bcfa-4789-9397-4001b795d75c
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Hill, A.B.
b1007941-b5b1-47cd-8476-7c6b9c57f347
Clark, D.J.
4d37cdbe-d8f5-47c6-a135-7950843def36
Dean, A.J.
2f9093f2-855c-4769-b1aa-6dd621b5dcf1
McBride, V.A.
a4608811-5a3f-4218-ada0-28f57ec2a0fd
Barlow, E.J.
5e205303-63c9-4d5f-a092-ba99dc129c4c
Bassani, L.
07e5602c-f97e-4334-a0fa-c2212431a61a
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Fiocchi, M.
74d63e71-f43d-494b-92ee-07dc83d18de1
Landi, R.
b8243478-d7a1-4774-8a66-4158a65a33d3
Scaringi, S.
5a05d9eb-9bfb-455a-abb1-b1ed3229f977
Bird, A.J.
045ee141-4720-46fd-a412-5aa848a91b32
Norton, A.J.
fe7d8253-bcfa-4789-9397-4001b795d75c
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Hill, A.B.
b1007941-b5b1-47cd-8476-7c6b9c57f347
Clark, D.J.
4d37cdbe-d8f5-47c6-a135-7950843def36
Dean, A.J.
2f9093f2-855c-4769-b1aa-6dd621b5dcf1
McBride, V.A.
a4608811-5a3f-4218-ada0-28f57ec2a0fd
Barlow, E.J.
5e205303-63c9-4d5f-a092-ba99dc129c4c
Bassani, L.
07e5602c-f97e-4334-a0fa-c2212431a61a
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Fiocchi, M.
74d63e71-f43d-494b-92ee-07dc83d18de1
Landi, R.
b8243478-d7a1-4774-8a66-4158a65a33d3

Scaringi, S., Bird, A.J., Norton, A.J., Knigge, C., Hill, A.B., Clark, D.J., Dean, A.J., McBride, V.A., Barlow, E.J., Bassani, L., Bazzano, A., Fiocchi, M. and Landi, R. (2010) Hard X-ray properties of magnetic cataclysmic variables. Monthly Notices of the Royal Astronomical Society, 401 (4), 2207-2218. (doi:10.1111/j.1365-2966.2009.15826.x).

Record type: Article

Abstract

Hard X-ray surveys have proven remarkably efficient in detecting intermediate polars and asynchronous polars, two of the rarest type of cataclysmic variable (CV). Here, we present a global study of hard X-ray-selected intermediate polars and asynchronous polars, focusing particularly on the link between hard X-ray properties and spin/orbital periods. To this end, we first construct a new sample of these objects by cross-correlating candidate sources detected in INTEGRAL/IBIS observations against catalogues of known CVs. We find 23 CV matches, and also present an additional nine (of which three are definite) likely magnetic cataclysmic variables (mCVs) identified by others through optical follow-ups of IBIS detections. We also include in our analysis hard X-ray observations from the Swift/BAT and SUZAKU/HXD in order to make our study more complete. We find that most hard X-ray-detected mCVs have Pspin/Porb < 0.1 above the period gap. In this respect, we also point out the very low number of detected systems in any band between Pspin/Porb= 0.3 and Pspin/Porb= 1 and the apparent peak of the Pspin/Porb distribution at about 0.1. The observational features of the Pspin–Porb plane are discussed in the context of mCV evolution scenarios. We also present for the first time evidence for correlations between hard X-ray spectral hardness and Pspin, Porb and Pspin/Porb . An attempt to explain the observed correlations is made in the context of mCV evolution and accretion footprint geometries on the white dwarf surface.

Full text not available from this repository.

More information

Published date: February 2010
Keywords: surveys, novae, cataclysmic variables, gamma-rays, observations, x-rays, binaries

Identifiers

Local EPrints ID: 144157
URI: http://eprints.soton.ac.uk/id/eprint/144157
ISSN: 0035-8711
PURE UUID: 9e84393b-e6cd-4ca5-a267-31ba0540ff34
ORCID for A.J. Bird: ORCID iD orcid.org/0000-0002-6888-8937
ORCID for A.B. Hill: ORCID iD orcid.org/0000-0003-3470-4834

Catalogue record

Date deposited: 16 Apr 2010 15:48
Last modified: 21 Apr 2020 00:28

Export record

Altmetrics

Contributors

Author: S. Scaringi
Author: A.J. Bird ORCID iD
Author: A.J. Norton
Author: C. Knigge
Author: A.B. Hill ORCID iD
Author: D.J. Clark
Author: A.J. Dean
Author: V.A. McBride
Author: E.J. Barlow
Author: L. Bassani
Author: A. Bazzano
Author: M. Fiocchi
Author: R. Landi

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.

×