12CO(1-0) Line Widths as Tully-Fisher Observables
Abstract
We investigate whether 12CO(J = 1 to 0) emission lines from galaxies can be used in lieu of lambda 21cm emission in the Tully-Fisher distance indicator as a measure of disk rotation velocity. Simulations determine appropriate data rejection and correction procedures for extragalactic CO emission spectra. A CO survey of cluster galaxies out to 8500kms^{-1} provides data for comparison with recent TF work, and we find CO line widths behave identically to HI and H alpha in luminosity-linewidth analyses.
- Publication:
-
Highly Redshifted Radio Lines
- Pub Date:
- 1999
- Bibcode:
- 1999ASPC..156...80L
- Keywords:
-
- MOLECULAR GAS;
- CO;
- TULLY-FISHER RELATION;
- INFRARED GALAXIES;
- HI;
- H ALPHA;
- SPIRAL GALAXIES;
- CLUSTERS