The molecular gas content of ULIRG type 2 quasars at z < 1 (Research Note)
Journal article, 2014

We present new results of CO(1-0) spectroscopic observations of four Sloan Digital Sky Survey (SDSS) type 2 quasars (QSO2) at z similar to 0.3, observed with the 30-m IRAM radio telescope. The QSO2 have infrared luminosities in the ultra-luminous infrared galaxies (ULIRG) regime. We confirm the CO(1-0) detection in one of our four QSO2, SDSS J1543-00, with L-CO' and M-H2 (1.2 +/- 0.2) x 10(10) K km s(-1) pc(2) and (9.4 +/- 1.4) x 10(9) M-circle dot, respectively. The full width at half maximum (FWHM) of the CO(1-0) line is =575 +/- 102 km s(-1). No CO(1-0)) emission is detected in SDSS J0903+02, SDSS j1337-01, SDSS j1520-01 above 3 sigma, yielding upper limits on M(H-2) similar to 9.6, 4.3 and 5.1 x 10(9) M-circle dot, respectively. We expand previous studies of the molecular gas content of intermediate z QSO2 into the ULIRG regime. Taking into account nine QSO2 at z similar to 0.3-1.0 from the literature, we discuss the location of the 13 ULIRG QSO2 at z < 1 with available L-CO' measurements in the L-CO' vs. z and L-CO' vs. L-FIR diagrams, in comparison with other QSO1. and ULIRG star forming samples.

quasars: emission lines

galaxies: ISM

quasars: general

Author

M. I. Rodriguez

Institute of Astrophysics of Andalusia (IAA)

M. Villar-Martin

Centro de Astrobiologia (CAB)

B. Emonts

Centro de Astrobiologia (CAB)

A. Humphrey

University of Porto

Guillaume Drouart

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

S. G. Burillo

Spanish National Observatory (OAN)

Miguel Angel Perez-Torres

Institute of Astrophysics of Andalusia (IAA)

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 565 A19

Subject Categories

Astronomy, Astrophysics and Cosmology

DOI

10.1051/0004-6361/201323004

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4/1/2021 1