Multiwavelength study of the newly confirmed supernova remnant MCSNR J0527-7104 in the Large Magellanic Cloud
Kavanagh PJ, Sasaki M, Points SD, Filipovic MD, Maggi P, Bozzetto LM, Crawford EJ, Haberl F, Pietsch W (2013)
Publication Status: Published
Publication Type: Journal article
Publication year: 2013
Journal
Publisher: EDP SCIENCES S A
Book Volume: 549
DOI: 10.1051/0004-6361/201220431
Abstract
Context. The Large Magellanic Cloud (LMC) hosts a rich and varied
population of supernova remnants (SNRs). Optical, X-ray, and radio
observations are required to identify these SNRs, as well as to
ascertain the various processes responsible for the large array of
physical characteristics observed.
Aims: In this paper we attempted
to confirm the candidate SNR [HP99] 1234, identified in X-rays with
ROSAT, as a true SNR by supplementing these X-ray data with optical and
radio observations.
Methods: Optical data from the Magellanic Cloud
Emission Line Survey (MCELS) and new radio data from the Molonglo
Observatory Synthesis Telescope (MOST), in addition to the ROSAT X-ray
data, were used to perform a multiwavelength morphological analysis of
this candidate SNR.
Results: An approximately ellipsoidal shell of
enhanced [S ii] emission, typical of an SNR ([S ii]/Hα > 0.4), was
detected in the optical. This enhancement is positionally coincident
with faint radio emission at λ = 36 cm. Using the available data we
estimated the size of the remnant to be ~5.1' × 4.0' (~75 pc × 59 pc).
However, the measurement along the major-axis was somewhat uncertain due
to a lack of optical and radio emission at its extremities and the poor
resolution of the X-ray data. Assuming this SNR is in the Sedov phase
and adopting the ambient mass density of 1.2 × 10-25 g cm-3 measured in a nearby H ii region, an age estimate of ~25 kyr was calculated for a canonical initial explosion energy of 1051
erg. However, this age estimate should be treated cautiously due to
uncertainties on the adopted parameters. Analysis of the local stellar
population suggested a type Ia event as a precursor to this SNR,
however, a core-collapse mechanism could not be ruled out due to the
possibility of the progenitor being a runaway massive star.
Conclusions: With the detection of X-ray, radio and significant optical
line emission with enhanced [S ii], this object was confirmed as an SNR
to which we assign the identifier MCSNR J0527-7104.
Authors with CRIS profile
Involved external institutions
University of Western Sydney
Australia (AU)
Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics
Germany (DE)
Eberhard Karls Universität Tübingen
Germany (DE)
Cerro Tololo Inter-American Observatory (CTIO)
Chile (CL)
Australia (AU)
Max-Planck-Institut für extraterrestrische Physik (MPE) / Max Planck Institute for Extraterrestrial Physics
Germany (DE)
Eberhard Karls Universität Tübingen
Germany (DE)
Cerro Tololo Inter-American Observatory (CTIO)
Chile (CL)
How to cite
APA:
Kavanagh, P.J., Sasaki, M., Points, S.D., Filipovic, M.D., Maggi, P., Bozzetto, L.M.,... Pietsch, W. (2013). Multiwavelength study of the newly confirmed supernova remnant MCSNR J0527-7104 in the Large Magellanic Cloud. Astronomy & Astrophysics, 549. https://doi.org/10.1051/0004-6361/201220431
MLA:
Kavanagh, P. J., et al. "Multiwavelength study of the newly confirmed supernova remnant MCSNR J0527-7104 in the Large Magellanic Cloud." Astronomy & Astrophysics 549 (2013).
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