A search for thermal hydroxyl emission in nearby galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Emission Spectra, Galactic Radiation, H Ii Regions, Hydroxyl Emission, Spiral Galaxies, Thermal Emission, Magellanic Clouds, Radio Sources (Astronomy), Radio Telescopes, Stellar Luminosity

Scientific paper

A survey of 63 nearby spiral galaxies for hydroxyl emission has been completed using the 305 m telescope of the Arecibo Observatory. The authors were hoping to detect the main lines at 1667 and 1665 MHz in LTE emission as observed in dark clouds and most GMCs in our own galaxy. No OH emission was detected, but limits have been set on the OH column densities of these galaxies.

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