Evolution of the radio emission from Kepler's Supernova remnant

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166469· OSTI ID:6921258

Dickel, J R; Sault, R; Arendt, R G; Korista, K T; Matsui, Y

High-resolution radio maps of Kepler's Supernova remnant (SNR) using all four arrays of the VLA have been obtained at wavelengths of 20 and 6 cm. They show the complete structure of the remnant; all features are resolved with sizes greater than about 2 arcsec, and the relative brightness of the smooth component near the center is about 1/4 the brightness of the rim. The results have been compared with earlier more limited data to measure changes in the remnant over a four-year time span. The SNR is expanding with a mean rate of R proportional to t exp 0.50 with considerable variations around the shell. Values range from R proportional to t exp 0.35 on the bright northern rim to R proportional to t exp 0.65 on the eastern part of the shell. The measurements are consistent with expansion into a variable circumstellar medium. 21 references.

• Research Organization: Illinois Univ., Urbana (USA); Northwestern Univ., Evanston, IL (USA)
• OSTI ID: 6921258
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 330; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPARATIVE EVALUATIONS
COSMIC RADIO SOURCES
DENSITY
ELECTROMAGNETIC RADIATION
EXPANSION
MAPS
MASS TRANSFER
MORPHOLOGY
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
STELLAR RADIATION
SUPERNOVA REMNANTS
VARIATIONS