AN ATTEMPT TO DETECT NEUTRAL HYDROGEN IN PLANETARY NEBULAE,

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Abstract:

Six planetary nebulae were observed at the frequency of the 21 cm hydrogen line in an attempt to detect absorption of the thermal radio emission in neutral hydrogen in the outer parts of the nebulae. No evidence of such neutral gas was detected, and in two cases an upper limit of 0.12 solar mass can be placed on the HI mass if the observations are interpreted in terms of a spherically-symmetrical model and the temperature of the neutral gas is or 100 degrees K. Author

Author(s):
Thompson, A. R. ; Colvin, R. S.
Author Organization(s):
CALIFORNIA INST OF TECH PASADENA OWENS VALLEY RADIO OBSERVATORY
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
1969-12
Contract/Grant Number(s):
N00014-67-A-0094-0008
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*NEBULAE, *HYDROGEN), (*EXTRATERRESTRIAL RADIO WAVES, DETECTION), INTERSTELLAR MATTER
Field(s)/Group(s):
Astrophysics
Keyword(s):
NGC 6302 NEBULA, NGC 6572 NEBULA, *PLANETARY NEBULAE
Report Date:
1969 Jan 01