Effects of mixing of the ejecta on the gamma-ray lines from SN 1987A

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

OSTI ID:7222669

Ebisuzaki, T; Shibazaki, N

Mixing of matter in the ejecta is suggested by hydrodynamical calculations for SN 1987A. The X-ray flux calculated including mixing reproduces well the observed X-ray light curve and spectra. The effects of mixing on the gamma-ray lines have been estimated. The line fluxes at times less than 1.5 yr after the explosion strongly depend on mixing, and are greatly increased for values of the mixed mass larger than 4 solar masses. The peak advances to an earlier time and its flux is also greatly enhanced. If 5 solar masses are adopted for the mixed mass, as suggested from the X-ray calculations, the 847 keV line will reach its peak around 1.1 yr after the explosion with flux of 0.00086 photons/sq cm per s. If the mixed mass is less than 4 solar masses, the mixing effect becomes less prominent. The gamma-ray lines expected from SN 1987A should be observable. The way in which gamma-ray line observations can be used to diagnose properties of the ejecta is discussed. 23 references.

• Research Organization: NASA, Marshall Space Flight Center, Huntsville, AL (USA)
• OSTI ID: 7222669
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 327; 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
BASIC INTERACTIONS
COBALT ISOTOPES
COMPTON EFFECT
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTROMAGNETIC RADIATION
ERUPTIVE VARIABLE STARS
GAMMA RADIATION
INTERACTIONS
IONIZING RADIATIONS
ISOTOPES
MASS
MASS TRANSFER
MATHEMATICAL MODELS
MIXING
RADIATION FLUX
RADIATIONS
SCATTERING
STAR MODELS
STARS
SUPERNOVAE
VARIABLE STARS
X RADIATION