Multi-frequency study of supernova remnants in the Large Magellanic Cloud

The case of LMC SNR J0530–7007

¹ School of Computing and Mathematics, University of Western Sydney Locked Bag 1797, Penrith South DC, NSW 1797, Australia
e-mail: a.dehorta@uws.edu.au
² Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany
³ Institut für Astronomie und Astrophysik Tübingen, Sand 1, 72076 Tübingen, Germany
⁴ Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
⁵ Isaac Newton Institute of Chile, Yugoslavia Branch, Belgrade, Serbia
⁶ Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801, USA
⁷ Physics and Astronomy Department, University of New Mexico, MSC 07-4220, Albuquerque, NM 87131, USA

Received: 21 December 2011
Accepted: 8 February 2012

Abstract

Context. The supernova remnants (SNRs) known in the Large Magellanic Cloud (LMC) show a variety of morphological structures in the different wavelength bands. This variety is the product of the conditions in the surrounding medium with which the remnant interacts and the inherent circumstances of the supernova event itself.

Aims. This paper performs a multi-frequency study of the LMC SNR J0530–7007 by combining Australia Telescope Compact Array (ATCA), Molonglo Observatory Synthesis Telescope (MOST), Röntgensatellit (ROSAT) and Magellanic Clouds Emission Line Survey (MCELS) observations.

Methods. We analysed radio-continuum, X-ray and optical data and present a multi-wavelength morphological study of LMC SNR J0530–7007.

Results. We find that this object has a shell-type morphology with a size of 215′′  ×  180′′ (52 pc × 44 pc); a radio spectral index (α =  −0.85  ±  0.13); with [S ii]/Hα  >  0.4 in the optical; and the presence of non-thermal radio and X-ray emission.

Conclusions. We confirmed this object as a bona-fide shell-type SNR which is probably a result of a Type Ia supernova.