A search for molecular lines in the direction of quasars

Details A search for molecular lines in the direction of quasars A search for molecular lines in the direction of quasars

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993azh....70..667v&link_type=abstract

Astronomicheskij Zhurnal, vol. 70, p. 667

Astronomy and Astrophysics

Astronomy

1

Quasars, Molecular Spectra, Line Spectra, Carbon Monoxide, Hydrocarbons, Radio Spectra, Milky Way Galaxy

Scientific paper

The paper describes an attempt to detect in QSP spectral lines of CO and CH molecules and a CI (3P0 - 3P1, lambda = 610 microns) fine-structure line, redshifted to millimeter wavelengths. Attention is given to five large, dense gas-dust complexes discovered before in the optical range and, in some cases, in the 21-cm H I line projected onto the quasars PKS 0528-250, PKS 1157+014, PKS 1129-021, PKS 0336-0142, and PKS 0458-02. An upper limit on the molecular column density is obtained. The possible detection of weak CO lines in two cases - PKS 1157+014 and PKS 1129-021 - is reported.

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