Maggi P, Haberl F, Kavanagh PJ, Points SD, Dickel J, Bozzetto LM, Sasaki M, Chu YH, Gruendl RA, Filipovic MD, Pietsch W (2014)
Publication Status: Published
Publication Type: Journal article
Publication year: 2014
Publisher: EDP SCIENCES S A
Book Volume: 561
DOI: 10.1051/0004-6361/201322820
Aims: We present a detailed multi-wavelength study of four new supernova
remnants (SNRs) in the Large Magellanic Cloud (LMC). The objects were
identified as SNR candidates in X-ray observations performed during the
survey of the LMC with XMM-Newton.
Methods: Data obained with
XMM-Newton are used to investigate the morphological and spectral
features of the remnants in X-rays. We measure the plasma conditions,
look for supernova (SN) ejecta emission, and constrain some of the SNR
properties (e.g. age and ambient density). We supplement the X-ray data
with optical, infrared, and radio-continuum archival observations, which
allow us to understand the conditions resulting in the current
appearance of the remnants. Based on the spatially-resolved star
formation history (SFH) of the LMC together with the X-ray spectra, we
attempt to type the supernovae that created the remnants.
Results:
We confirm all four objects as SNRs, to which we assign the names MCSNR
J0508-6830, MCSNR J0511-6759, MCSNR J0514-6840, and MCSNR J0517-6759. In
the first two remnants, an X-ray bright plasma is surrounded by very
faint [S ii] emission. The emission from the central plasma is dominated
by Fe L-shell lines, and the derived iron abundance is greatly in
excess of solar. This establishes their type Ia (i.e. thermonuclear) SN
origin. They appear to be more evolved versions of other Magellanic
Cloud iron-rich SNRs which are centrally-peaked in X-rays. From the two
other remnants (MCSNR J0514-6840 and MCSNR J0517-6759), we do not see
ejecta emission. At all wavelengths at which they are detected, the
local environment plays a key role in their observational appearance. We
present evidence that MCSNR J0517-6759 is close to and interacting with
a molecular cloud, suggesting a massive progenitor.
APA:
Maggi, P., Haberl, F., Kavanagh, P.J., Points, S.D., Dickel, J., Bozzetto, L.M.,... Pietsch, W. (2014). Four new X-ray-selected supernova remnants in the Large Magellanic Cloud. Astronomy & Astrophysics, 561. https://doi.org/10.1051/0004-6361/201322820
MLA:
Maggi, P., et al. "Four new X-ray-selected supernova remnants in the Large Magellanic Cloud." Astronomy & Astrophysics 561 (2014).
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