Abstract
view Abstract Citations (21) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Clumpy Galaxy Markarian 297 and Its Supernova Activity Yin, Q. F. Abstract I present radio observations of the clumpy irregular galaxy Mrk 297 (= NGC 6052) made with the VLA at 20, 6, 3.6, and 2 cm from 1980 January to 1992 April, which show that the variable, compact source (Mrk 297A) is a single supernova with the highest peak radio luminosity known for a supernova. Twenty-one VLA flux-density measurements at four wavelengths of the compact source, obtained over the past 12 yr, yield a satisfactory fit to Chevalier's model for supernova light curves. Shorter period fluctuations in the observations are significant and are consistent with refractive interstellar scintillation. The supernova rate for the entire galaxy can be estimated from a global formula (Condon & Yin 1990) which uniquely relates total nonthermal radio emission to supernova rate. The resulting supernova rate estimated for the entire galaxy Mrk 297 is high (0.3 yr^-1^).However, most individual Type II radio supernovae are too weak to be detected at the distance of Mrk 297. Publication: The Astrophysical Journal Pub Date: January 1994 DOI: 10.1086/173548 Bibcode: 1994ApJ...420..152Y Keywords: Galactic Clusters; Irregular Galaxies; Light Curve; Markarian Galaxies; Star Formation Rate; Supernovae; Emission Spectra; Luminosity; Radio Astronomy; Radio Emission; Very Large Array (Vla); X Ray Spectra; Astrophysics; GALAXIES: STELLAR CONTENT; GALAXIES: INDIVIDUAL NAME: MARKARIAN 297; RADIO CONTINUUM: GALAXIES; STARS: SUPERNOVAE: GENERAL full text sources ADS | data products SIMBAD (7) NED (6)
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