G126.1-0.8-14: A molecular shell related to Sh2-187

CICHOWOLSKI, S.; PINEAULT, S.; GAMEN, R.; ORTEGA, M.E.; ARNAL, E. M.; SUAD, L.A.

REV. MEX. ASTRON. ASTR.

Ciuidad Universitaria

Lugar: Ciuidad de Mexico; Año: 2014 vol. 44 p. 135 - 135

1405-2059

We present a multi-wavelength study of a region where a well defined molecular shell, named G 126.1-0.8-14, is observed. The distance of G 126.1-0.8-14 is about 1 kpc. Based on HI and CO data we analyze the atomic and molecular gas relatedto the structure and estimate its main physical properties. From the radio continuumand infrared data we analyze whether the emission associated with G 126.1-0.8-14 has a thermal origin. To disentangle the possible origin of the shell, and given the lack of catalogued O-type stars in the area, we observed with GEMINIthe spectra of four OB stars located in projection inside the shell, to get their accurate spectral types and distances. The young HII region Sh2-187 is located onto the densest part of this molecular shell. A search for young stellar object candidates (cYSOs) was made using infrared point source catalogs. Several cYSOs are found spread out onto the shell. Based on all the available data, we discuss the possible origin of G 126.1-0.8-14 as well as its role in the formation of a new generation of stars.