CS (5-4) survey towards nearby infrared bright galaxies
Abstract
With the observations of the CS (5-4) line towards a sample of 24 infrared bright galaxies using Heinrich Hertz Submillimeter Telescope (HHSMT), we detected CS (5-4) emission in 14 galaxies, including 12 ultraluminous infrared galaxies (ULIRGs)/luminous infrared galaxies (LIRGs) and two nearby normal galaxies. As a good dense gas tracer, which has been well used for studying star formation in the Milky Way, CS (5-4) can trace the active star-forming gas in galaxies. The correlation between CS (5-4) luminosity, which is estimated with detected CS (5-4) line emission, and the infrared luminosity in these 14 galaxies, is fitted with a correlation coefficient of 0.939 and a slope close to unity. This correlation confirms that dense gas, which is closely linked to star formation, is very important for understanding star formation in galaxies.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 2011
- DOI:
- 10.1111/j.1745-3933.2011.01090.x
- arXiv:
- arXiv:1106.2873
- Bibcode:
- 2011MNRAS.416L..21W
- Keywords:
-
- ISM: molecules;
- galaxies: ISM;
- radio lines: galaxies;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 6 pages, 3 Figures, accepted by MNRAS Letters