Searches for molecular lines toward quasars

Details Searches for molecular lines toward quasars Searches for molecular lines toward quasars

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993arep...37..334v&link_type=abstract

Astronomy Reports, Volume 37, Issue 4, July 1993, pp.334-337

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on an attempt to detect certain lines of CO and CH molecules, as well as the C I (^3^P_0_-^3^P_1_,λ = 610 microns) fine- structure line, red-shifted into the millimeter-wave range, toward distant quasars. We have investigated five dense gas-dust complexes, detected in the visible and, in certain cases, in the 21-cm H I line, projected onto the quasars PKS 0528-250, PKS 1157+014, PKS 1229-021, PKS 0336-0142, and PKS 0458-02. We obtain upper limits on optical depth and molecular abundances. Weak CO lines may have been detected in two cases: PKS 1157+014 and PKS 1229-021.

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