Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 485, Issue 1, Pages L6-L10Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/slz018
Keywords
stars: emission-line, Be; stars: individual: [MA93] 1393; stars: massive; ISM: supernova remnants; X-rays: binaries; X-rays: individual: SXP 1323
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Funding
- Southern African Large Telescope (SALT) [2010-1-RSA-OTH-001, 2018-1-MLT-008]
- Russian Foundation for Basic Research grant [19-02-00779]
- National Research Foundation (NRF) of South Africa
- Russian Government Program of Competitive Growth of Kazan Federal University
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We report the discovery of a circular shell centred on the Be X-ray binary (BeXB) SXP 1323 in the Small Magellanic Cloud. The shell was detected in an H alpha image obtained with the Very Large Telescope. Follow-up spectroscopy with the Southern African Large Telescope showed that the shell expands with a velocity of approximate to 100 km s(-1) and that its emission is due to shock excitation. We suggest that this shell is a remnant of the supernova explosion that led to the formation of SXP 1323's neutron star approximate to 40 000 yr ago. SXP 1323 represents the second known case of a BeXB associated with a supernova remnant (the first one is SXP 1062). Interestingly, both of these BeXBs harbour long-period pulsars and are located in a low-metallicity galaxy.
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