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Optical spectroscopy of IRAS sources with infrared emission bands. 1: IRAS 21282+5050 and the diffuse interstellar bandsSpectroscopy of the starlike optical counterpart to IRAS 21282+5050, a source with the hydrocarbon infrared emission band spectrum, shows an 07(f)-(WC11) planetary nebula nucleus suffering an extinction of 5.7 mag. Emission line widths in the WC spectrum are only approx. 100 km/s, indicating a very slow stellar wind. Optical diffuse interstellar bands (DIBs) are prominent. Five DIBs are strongly enhanced, namely lamda lamda 5797, 6196, 6203, 6283, and 6613. The presence of circumstellar hydrocarbon molecules may explain both the infrared emission bands and the enhanced DIBs.
Document ID
19880001229
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Cohen, Martin (California Univ. Berkeley., United States)
Jones, B. F. (Lick Observatory Santa Cruz, Calif., United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Optics
Report/Patent Number
NASA-CR-181387
NAS 1.26:181387
Report Number: NASA-CR-181387
Report Number: NAS 1.26:181387
Accession Number
88N10611
Funding Number(s)
CONTRACT_GRANT: NCC2-142
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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