Observations of Carbon Recombination Line Emission in the Reflection Nebula M78 (16),

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Abstract:

The C116 alpha and C142 alpha recombination lines have been detected in the reflection nebula M78. The line emission arises in a cold T approximately equal 20K CII Stromgren sphere ionized by HD38563N and S, the exciting stars of M78 that are embedded in the dark cloud L1630. The observed lines are extremely narrow, the full width at half maximum delta V 1.3 kms, making these the narrowest radio recombination lines yet detected.

Author(s):
Brown, Robert L. ; Knapp, G. R. ; Kuiper, T. B. H. ; Kuiper, Eva N. R.
Author Organization(s):
OWENS VALLEY RADIO OBSERVATORY PASADENA CALIF
Supplementary Note:
Prepared in cooperation with National Radio Astronomy Observatory, Green Bank, W. Va.
Pagination:
0011

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
1974-16
Contract/Grant Number(s):
N00014-67-A-0094-0019, NSF-GP-30400
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*EXTRATERRESTRIAL RADIO WAVES, *NEBULAE, CARBON
Field(s)/Group(s):
Astrophysics
Keyword(s):
M78 nebula
Report Date:
1974 Jan 01