The molecular gas content of blue dwarf galaxies A collapsing detached molecular system in He 2-10?

Vanzi L.; Combes F.; Rubio M.; Kunth D.

Abstract

We present new observations of a sample of blue dwarf galaxies in the lines of CO(3-2) and HCN(4-3). The observations were obtained with the 12 m APEX telescope located at an altitude of 5100 m in Chajnantor (ALMA site). We detected CO(3-2) emission in seven of nine observed galaxies in our sample. In two galaxies, NGC 5253 and He 2-10, we mapped the central < in the CO(3-2) emission line. In He 2-10, we detected an extended component of molecular gas to the north-east of the main body of the galaxy. Comparing our data with previous HI and CO observations, we speculate that the presence of this detached cloud of molecular gas is produced by the merger already known in He 2-10, and could lead to the formation of a small tidal dwarf galaxy. The HCN(4-3) line was observed in NGC 5253 and He 2-10 only, but not detected. © 2009 ESO.

Más información

Título según WOS: The molecular gas content of blue dwarf galaxies A collapsing detached molecular system in He 2-10?
Título según SCOPUS: The molecular gas content of blue dwarf galaxies
Título de la Revista: ASTRONOMY & ASTROPHYSICS
Volumen: 496
Número: 3
Editorial: EDP SCIENCES S A
Fecha de publicación: 2009
Página de inicio: 677
Página final: 682
Idioma: English
URL: http://www.aanda.org/10.1051/0004-6361/200810365
DOI:

10.1051/0004-6361/200810365

Notas: ISI, SCOPUS