Molecular Clouds resolved with ALMA 12CO J=1-0 and J=2-1 observations towards the Magellanic Bridge

M. T. VALDIVIA ; M. MUÑOZ; M. RUBIO; H. P. SALDAÑO

La Serena

Congreso; Reunión Binacional AAA-SOCHIAS; 2018

Sociedad Chilena de Astronomía (SOCHIAS) y la Asociación Argentina de Astronomía (AAA)

We present the results of the ALMA 12CO J=1−0 and J=2−1 observations done in regions B and C of the Magellanic Bridge. The resolution of ALMA data allows us to identify individual molecular clouds: region B is resolved into at least 5 clouds with radii spanning from 2 to 4.5 pc and region C consists of 7 cloudswith radii from 0.5 to 2.5 pc. All of these have narrow velocity line widths (∆v= 0.7−1.8 km s−1), which indicate very cold and quiescent gas. We also found that the line ratios are all close to 1 (ranging from 0.8 to1.4) consistent with optically thick and dense clouds. These sources follow the same tendencies in their physicalproperties than other dwarf galaxies of the Local Group, including the SMC and LMC.