A search for thermal hydroxyl emission in nearby galaxies

A search for thermal hydroxyl emission in nearby galaxies

A survey of 63 nearby spiral galaxies for hydroxyl emission has been completed using the 305-m telescope of the Arecibo Observatory. The aim was to detect the main lines at 1667 and 1665 MHz in LTE emission, as observed in dark clouds and most GMCs in the Galaxy. No OH emission was detected, but lim...

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Veröffentlicht in:Astron. J.; (United States) 1988-03, Vol.95, p.672-676
Hauptverfasser: Schmelz, J. T., Baan, W. A.
Format: Artikel
Sprache:eng
Schlagworte:
640105 - Astrophysics & Cosmology- Galaxies
ANTENNAS
CHEMICAL COMPOSITION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONFIGURATION
COSMIC GASES
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EMISSION SPECTRA
EQUILIBRIUM
FLUIDS
GALAXIES
GASES
HYDROXYL RADICALS
LTE
MAGELLANIC CLOUDS
NONLUMINOUS MATTER
RADICALS
RADIO EQUIPMENT
RADIO TELESCOPES
SPECTRA
SPIRAL CONFIGURATION
TELESCOPES
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Beschreibung
Zusammenfassung:A survey of 63 nearby spiral galaxies for hydroxyl emission has been completed using the 305-m telescope of the Arecibo Observatory. The aim was to detect the main lines at 1667 and 1665 MHz in LTE emission, as observed in dark clouds and most GMCs in the Galaxy. No OH emission was detected, but limits have been set on the OH column densities of these galaxies. (Author)
ISSN:0004-6256
DOI:10.1086/114665