Detection of distant extragalactic OH in absorption

Details Detection of distant extragalactic OH in absorption Detection of distant extragalactic OH in absorption

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152l...9k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 1, Nov. 1985, p. L9-L11.

Astronomy and Astrophysics

Astronomy

11

Extragalactic Radio Sources, Hydroxyl Radicals, Interstellar Masers, Molecular Clouds, Radio Astronomy, Absorption Spectra, Luminosity

Scientific paper

OH absorption features were observed at greater than 200 Mpc distance from the galaxy B2 1506 + 34. The data were collected with the 200 x 40 m radio telescope at the Paris Observatory in 1984. Linear polarizations were observed at 1667 and 1665 MHz, with the data being fed through a 1024 channel autocorrelator. The spectral data covered 8.35 MHz, i.e., about 1500 km/sec. OH absorption data are presented for the objects NGC 2623, Mrk 231, NGC 5506 and B2 1506 + 34. The 1667/1665 flux ratio varied from 0.9-2.1 indicating the presence of a molecular gas with a 10 K temperature and column densities one to two orders of magnitude larger than those in our Galaxy.

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