Distribution of molecular gas in the primeval galaxy IRAS F 10214+4724.
Abstract
Using the IRAM interferometer we mapped the distribution of molecular gas in the extremely luminous IRAS galaxy F10214+4724 at z = 2.3. Coincident with the radio continuum source there is a small emission region whose CO(3 - 2) flux, 3.5 +/- 0.5 Jy km s^-1^, equals the total line flux measured with the IRAM 30 m telescope. This molecular source seems partially resolved by the 2.3" beam and extended East-West. The deconvolved size, (2.5" x 1.0")+/- 1.0" or (10 x 4) +/- 4h^-1^ kpc, is characteristic of an entire galaxy rather than a galactic core. An apparent velocity gradient indicates the gas distribution is rotating. The dynamical mass, 8-13 x 10^10^ h^-1^ M_sun_, is consistent with the inferred H2 mass, 1 x 10^11^ h^-2^ M_sun.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1993
- Bibcode:
- 1993A&A...271L..21R