Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...68..103i&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 68, no. 1, Feb. 1987, p. 103-107.
Astronomy and Astrophysics
Astronomy
6
Infrared Astronomy Satellite, Planetary Nebulae, Cosmic Dust, Far Infrared Radiation, Luminosity, Temperature Measurement
Scientific paper
A search of the Infrared Astronomical Satellite (IRAS) Point Source Catalog for the Far Infrared (FIR) counterparts of 104 optical objects classified between 1977 and 1984 as planetary nebulae (PNe) resulted in the identification of only 31 of them with IRAS sources. The fields of a large number of these nebulae are found to contain both point as well as small size extended sources (in the IRAS scan windows centered on them) with their numbers varying from field to field. Some of these may be due to condensations of dust and may be associated with the optical knots often seen in PNe. The dust temperature of these nebulae (as in other PNe) range from 30-120 K. These nebulae are much fainter in the infrared compared to the sample of PNe for which similar data are available from Pottasch et al. (1984) and Iyengar (1986), and cover the flux range (0.02-4.5) x 10 to the -12th W/m. Infrared luminosity and dust mass for seven of these nebulae for which distance estimates are available are presented.
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