G 126.1-0.8-14: A molecular shell related to Sh2-187

CICHOWOLSKI SILVINA; PINEAULT SERGE; GAMEN ROBERTO; ORTEGA MARTIN E.; ARNAL E. MARCELO; SUAD LAURA A.

Congreso; XIV Latin American Regional IAU Meeting; 2013

We present a multi-wavelength study of a region where a well definedmolecular shell, named G 126.1-0.8-14, is observed. The distance of G126.1-0.8-14 is about 1 kpc. Based on HI and CO data we analyze theatomic and molecular gas related to the structure and estimate its mainphysical properties. From the radio continuum and infrared data weanalyze whether the emission associated with G 126.1-0.8-14 has athermal origin. To disentangle the possible origin of the shell, andgiven the lack of catalogued O-type stars in the area, we observed withGEMINI the spectra of four OB stars located in projection inside theshell, to get their accurate spectral types and distances. The young HIIregion Sh2-187 is located onto the densest part of this molecular shell.A search for young stellar object candidates (cYSOs) was made usinginfrared point source catalogs. Several cYSOs are found spread out ontothe shell. Based on all the available data, we discuss the possibleorigin of G 126.1-0.8-14 as well as its role in the formation of a newgeneration of stars.