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Very little work has been done on star formation in dwarf lenticular galaxies(S0s). We present 2D-spectroscopic and millimetre observations made by CentroAstronomico Hispano Aleman (CAHA) 3.5 m optical and the IRAM-30 m millimetretelescopes, respectively, for a sample of four dwarf S0 galaxies with multiplestar formation regions in the field environment. We find that although most ofthe sources deviate from the star forming main sequence relation, they allfollow the Kennicutt-Schmidt law. After comparing the stellar and Halphakinematics, we find that the velocity fields of both stars and ionized gas donot show regular motion and the velocity dispersions of stars and ionized gasare low in the regions with high star formation, suggesting these star-formingS0 galaxies still have significant rotation. This view can be supported by theresult that most of these dwarf S0 galaxies are classified as fast rotators.The ratio of average atomic gas mass to stellar mass (~ 47%) is much greaterthan that of molecular gas mass to stellar mass (~ 1%). In addition, thegas-phase metallicities in the star-forming regions are lower than that of thenon-star-forming regions. These results indicate that the extended starformation may originate from the combination of abundant atomic hydrogen, longdynamic time scale and low-density environment.

Observations of cold gas and star formation in dwarf S0 galaxies