Radio flux variation of young supernova remnants

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Sov. Astron. Lett. (Engl. Transl.); (United States)

OSTI ID:7063636

Ivanov, V P; Bubukin, I T; Stankevich, K S

The 31.5-cm radio flux density of Cas A, the Crab Nebula, and the remnant of the 1572 supernova relative to that of the radio galaxies Cyg A and Vir A was measured in 1981. Comparison with similar observations in 1964 and 1972 shows that over the past decade the decline of the Cas A flux has slowed by a factor 2.2 and now amounts to (0.413 +- 0.08)%/yr. The Crab flux was (3.5 +- 1.0)% weaker in 1981 than in 1964 and 1972; it probably dropped abruptly between 1972 and 1977. For the 1572 SNR the annual mean decline over the 17-yr period is (0.5 +- 0.15)%/yr.

• Research Organization: Special Astrophysical Observatory, USSR Academy of Sciences, Nizhnii Arkhyz
• OSTI ID: 7063636
• Journal Information: Sov. Astron. Lett. (Engl. Transl.); (United States), Journal Name: Sov. Astron. Lett. (Engl. Transl.); (United States) Vol. 8:1; ISSN SALED
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC RADIO SOURCES
CRAB NEBULA
ELECTROMAGNETIC RADIATION
FLUX DENSITY
FREQUENCY RANGE
MHZ RANGE
MHZ RANGE 100-1000
NEBULAE
RADIANT FLUX DENSITY
RADIATION FLUX
RADIATIONS
RADIOWAVE RADIATION
SUPERNOVA REMNANTS
VARIATIONS