Thermal radiation from dust grains formed in the ejecta of SN 1987A

Journal Article · Wed Nov 01 00:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185584· OSTI ID:7144098

Kozasa, T; Hasegawa, H; Nomoto, K ^[1]

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1. Kyoto Univ. (Japan) Tokyo Univ. (Japan)

The results of calculations for the thermal radiation from dust grains formed in the ejecta of SN 1987A are presented. If the carbon-rich layer in the ejecta is mixed with the more massive oxygen-rich layer, graphite grains do not condense but Al2O3 grains condense first. The time development of observed infrared excess in the 10 micron region from day 465 to 635 can be well explained in terms of the thermal radiation from Al2O3 grains formed in the ejecta. The radii of Al2O3 grains are a few tens of A and the grain temperature is 450-400 K. The total infrared luminosity is about 10 to the 39th erg/s, which is comparable to the deficiency of the observed U to M bolometric luminosity after day 500 from that expected from the decays of Co-56 and Co-57. 16 refs.

• OSTI ID: 7144098
• Journal Information: Astrophysical Journal; (USA), Vol. 346; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SUPERNOVA REMNANTS
THERMAL RADIATION
ALUMINIUM OXIDES
CARBON
COSMIC DUST
ENERGY SPECTRA
INFRARED RADIATION
INTERSTELLAR GRAINS
LUMINOSITY
MAGELLANIC CLOUDS
MASS TRANSFER
SUPERNOVAE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COSMIC RADIO SOURCES
DUSTS
ELECTROMAGNETIC RADIATION
ELEMENTS
ERUPTIVE VARIABLE STARS
GALAXIES
NONMETALS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PHYSICAL PROPERTIES
RADIATIONS
SPECTRA
STARS
VARIABLE STARS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources