The University of Southampton
University of Southampton Institutional Repository

X-ray spectral analysis of the neutron star in SNR 1E 0102.2-7219

X-ray spectral analysis of the neutron star in SNR 1E 0102.2-7219
X-ray spectral analysis of the neutron star in SNR 1E 0102.2-7219
We re-analysed numerous archival Chandra X-ray observations of the bright supernova remnant (SNR) 1E 0102.2-7219 in the Small Magellanic Cloud, to validate the detection of a neutron star (NS) in the SNR by Vogt et al. (2018). Careful attention to the background is necessary in this spectral analysis. We find that a blackbody+power-law model is a decent fit, suggestive of a relatively strong B field and synchrotron radiation, as in a normal young pulsar, though the thermal luminosity would be unusually high for young pulsars. Among realistic NS atmosphere models, a carbon atmosphere with B=10^12 G best fits the observed X-ray spectra. Comparing its unusually high thermal luminosity (L_bol = 1.1_-0.05^+1.6x10^34 ergs s^-1) to other NSs, we find that its luminosity can be explained by decay of an initially strong magnetic field (as in magnetars or high B-field pulsars) or by slower cooling after the supernova explosion. The nature of the NS in this SNR (and of others in the Magellanic Clouds) could be nicely confirmed by an X-ray telescope with angular resolution like Chandra, but superior spectral resolution and effective area, such as the Lynx concept.
0035-8711
1585-1599
Hebbar, Pavan R.
5286612c-e0ce-4800-a584-0f338c45c090
Heinke, Craig O.
d7382ed2-cb85-4e15-b2d9-296fc8b6221d
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Hebbar, Pavan R.
5286612c-e0ce-4800-a584-0f338c45c090
Heinke, Craig O.
d7382ed2-cb85-4e15-b2d9-296fc8b6221d
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45

Hebbar, Pavan R., Heinke, Craig O. and Ho, Wynn C.G. (2019) X-ray spectral analysis of the neutron star in SNR 1E 0102.2-7219. Monthly Notices of the Royal Astronomical Society, 491 (2), 1585-1599. (doi:10.1093/mnras/stz2570).

Record type: Article

Abstract

We re-analysed numerous archival Chandra X-ray observations of the bright supernova remnant (SNR) 1E 0102.2-7219 in the Small Magellanic Cloud, to validate the detection of a neutron star (NS) in the SNR by Vogt et al. (2018). Careful attention to the background is necessary in this spectral analysis. We find that a blackbody+power-law model is a decent fit, suggestive of a relatively strong B field and synchrotron radiation, as in a normal young pulsar, though the thermal luminosity would be unusually high for young pulsars. Among realistic NS atmosphere models, a carbon atmosphere with B=10^12 G best fits the observed X-ray spectra. Comparing its unusually high thermal luminosity (L_bol = 1.1_-0.05^+1.6x10^34 ergs s^-1) to other NSs, we find that its luminosity can be explained by decay of an initially strong magnetic field (as in magnetars or high B-field pulsars) or by slower cooling after the supernova explosion. The nature of the NS in this SNR (and of others in the Magellanic Clouds) could be nicely confirmed by an X-ray telescope with angular resolution like Chandra, but superior spectral resolution and effective area, such as the Lynx concept.

Text
1909.04744 - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 8 September 2019
e-pub ahead of print date: 16 September 2019
Published date: 28 November 2019

Identifiers

Local EPrints ID: 434122
URI: http://eprints.soton.ac.uk/id/eprint/434122
ISSN: 0035-8711
PURE UUID: ce9edbd3-b4f0-4721-bb85-376ce06fed78
ORCID for Wynn C.G. Ho: ORCID iD orcid.org/0000-0002-6089-6836

Catalogue record

Date deposited: 13 Sep 2019 16:30
Last modified: 16 May 2020 00:37

Export record

Altmetrics

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.

×