Abstract
view Abstract Citations (77) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Anomalous extinction in the planetary nebula Abell 30. Greenstein, J. L. Abstract The stellar continuous energy distribution from 8000 to 1250 A in Abell 30 is quite peculiar. The observed flux can be understood if a hot central star (approximately 200,000 K) is immersed in an absorbing dust cloud which has anomalous absorption with its peak near 2470 A. The dust nebula is a strong infrared source, maintained by conversion of the stellar UV flux. The internal reddening is E(B - V) = 0.30 mag and reaches 2.5 mag at 2470 A; it is best matched not by graphite but by laboratory observations of carbon smoke. Intense P Cygni lines show that a strong stellar wind exists. The central star may be an O subdwarf, approaching more nearly a helium-carbon degenerate DO. Publication: The Astrophysical Journal Pub Date: April 1981 DOI: 10.1086/158792 Bibcode: 1981ApJ...245..124G Keywords: Early Stars; Interstellar Extinction; Planetary Nebulae; Spectral Energy Distribution; Stellar Spectra; Subdwarf Stars; Absorption Spectra; Graphite; Hot Stars; Stellar Envelopes; Stellar Spectrophotometry; Stellar Winds; Ultraviolet Astronomy; Astronomy full text sources ADS | data products SIMBAD (1) MAST (1)
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