A new galactic supernova remnant, G312.4-0.4

Details A new galactic supernova remnant, G312.4-0.4 A new galactic supernova remnant, G312.4-0.4

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..753c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 1, 1985, p. 753-760.

Astronomy and Astrophysics

Astronomy

12

Astronomical Maps, Galactic Structure, Radio Sources (Astronomy), Supernova Remnants, Brightness, Formaldehyde, H Ii Regions

Scientific paper

A new continuum map at 408 MHz is presented for a portion of the galactic plane near longitude 312°. Comparison with 5000-MHz measurements of similar angular resolution (several arcminutes), in both the radio continuum and hydrogen recombination lines, has allowed the authors to distinguish a hitherto unnoticed supernova remnant (SNR), G312.4-0.4, with angular diameter ≡0°.5 and distance ≡5 kpc. Other discrete sources on the map include: (1) a previously known SNR, G311.5-0.3; (2) four sources that are non-thermal and most likely extragalactic; (3) 16 H II regions, of which two are located in an extremely distant portion of the Carina spiral arm, ≡16 kpc from the Sun, with galactocentric radius ≡12.3 kpc.

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