Echelle observations of supernova remnants in the Magellanic Clouds

Details Echelle observations of supernova remnants in the Magellanic Clouds Echelle observations of supernova remnants in the Magellanic Clouds

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95.1111c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, April 1988, p. 1111-1121.

Astronomy and Astrophysics

Astronomy

75

Astronomical Spectroscopy, Interstellar Space, Magellanic Clouds, Stellar Evolution, Supernova Remnants, Charge Coupled Devices, Hydrogen Clouds, Nonthermal Radiation, Radio Sources (Astronomy), Signal To Noise Ratios

Scientific paper

Long-slit echelle observations of eight cataloged supernova remnants (SNRs) in the Magellanic Clouds have been obtained: N19 in the SMC, and N11L, N49, N63A, N86, N135, N157B, and N206 in the LMC. These SNRs were selected to cover a large range in morphology and interstellar environment. The H-alpha and forbidden N II emission-line images provide a homogeneous set of data on the large-scale kinematics of the line-emitting gas in evolved SNRs. The data have been used to simulate integrated velocity profiles in order to estimate the importance of foreground nebular contamination on the emission spectra of SNRs in distant galaxies, and for comparison with the luminous SNR candidates in the giant H II regions in M101. Five unconfirmed SNR candidates have also been observed: N66 in the SMC, and the nonthermal radio sources 0525-66.3 and 0526-66.2, the superbubble 0536-692, and N70 in the LMC. The presence of a SNR within the H II region N66 is confirmed, and SNRs in the nonthermal radio sources 0525-66.3 and 0526-66.2 have been ruled out. The nature of 0536-692 and N70 remains ambiguous.

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