Search for atomic hydrogen from evolved stars and planetary nebulae

Journal Article · Sat Nov 01 04:00:00 EST 1980 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/158415· OSTI ID:6565232

Zuckerman, B; Terzian, Y; Silverglate, P

With the 1000 foot (305 m) Arecibo antenna, we searched for 21 cm wavelength radiation from atomic hydrogen in expanding envelopes around a total of 13 red giant stars and planetary nebulae. For some stars (e.g., IRC + 10216, IRC + 10011) upper limits on the mass of atomic hydrogen in the circumstellar envelopes are a few percent of the total envelope mass estimated from other considerations. Toward ..cap alpha.. Ori intense, patchy background emission precludes a definitive estimate of the atomic hydrogen content in the envelope. No 21 cm radiation was detected that is directly associated with the planetary nebulae NGC 6210, NGC 6572, NGC 6720, and NGC 2346. Possible 21 cm absorption of the continuum radiation from NGC 6572 by foreground hydrogen would suggest a distant location for this nebula.

• Research Organization: Univ. of Maryland, College Park
• OSTI ID: 6565232
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 241:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CHEMISTRY
COSMIC RADIO SOURCES
COSMOCHEMISTRY
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY SPECTRA
GIANT STARS
HYDROGEN
NEBULAE
NONMETALS
PLANETARY NEBULAE
RADIATIONS
RADIOWAVE RADIATION
RED GIANT STARS
SPECTRA
STARS
STELLAR ATMOSPHERES