Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...358..494b&link_type=abstract
Astronomy and Astrophysics, v.358, p.494-498 (2000)
Astronomy and Astrophysics
Astrophysics
12
Galaxies: Abundances, Galaxies: Evolution, Galaxies: Individual: Malin 1, Galaxies: Ism, Galaxies: Spiral, Radio Lines: Galaxies
Scientific paper
A sensitive search for CO emission from the Low Surface Brightness Galaxy Malin 1 has yielded negative results. The nucleus and several positions corresponding to regions of star formation in the disk were observed in the CO(1-0) and CO(2-1) lines with no detection. Use of a ``standard'' N(H_2) / I_CO(1-0) conversion factor yields M_H2/M_{HI < 0.03. However, rather than argue that there is very little molecular gas in Malin 1, where some star formation is currently taking place, we attribute the non-detection chiefly to the low temperature of the gas. Detection of CO may be rendered still more difficult by a subsolar metallicity.
Braine Jonathan
Herpin Fabrice
Radford Simon J. E.
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