Radio emission from nova shells

Journal Article · Mon Oct 01 00:00:00 EDT 1979 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/112585· OSTI ID:5786706

Hjellming, R M; Wade, C M; Vandenberg, N R; Newell, R T

Multifrequency radio data for the novae HR Delphini 1967, FH Serpentis 1970, and V1500 Cygni 1975 are reported which cover most of the major stages of the radio ''light'' curves of expanding, ionized nova shells. A simple solution to the equations of mass and momentum conservation with spherical symmetry is shown to fit the radio data for all three novae with only three parameters. For electron temperatures of 10000 K and distances of 800, 650, and 1400 pc, the respective parameters for the shells of HR Del, FH Ser, and V1500 Cyg are: masses of 8.6 x 10/sup -5/, 4.5 x 10/sup -5/, and 2.4 x 10/sup -4/ solar masses, inner velocities of 200, 48, and 200 k/s, and outer velocities of 450, 1006, and 5600 k/s. With the addition of initial finite thickness parameters the model predictions and the infrared data of V1500 Cygni are in good agreement. The main features of the models for all three novae are strong density and velocity gradients. The observable part of each nova shell changes during critical stages, with the inner, higher density portions eventually dominating.

• Research Organization: National Radio Astronomy Observatory, Socorro, New Mexico 87801
• OSTI ID: 5786706
• Journal Information: Astron. J.; (United States), Vol. 84:10
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
NOVAE
RADIOWAVE RADIATION
INFRARED RADIATION
MASS
RADIANT FLUX DENSITY
RADIATION FLUX
STAR MODELS
ELECTROMAGNETIC RADIATION
ERUPTIVE VARIABLE STARS
FLUX DENSITY
MATHEMATICAL MODELS
RADIATIONS
STARS
VARIABLE STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources
640103 - Astrophysics & Cosmology- Quasi-Stellar
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