A molecular and infrared analysis of the local surroundings of WR16

CICHOWOLSKI, SILVINA; REYNOSO, E. M.; DURONEA, NICOLÁS U.; NORIEGA-CRESPO, A.; SUAD, LAURA A.

Bariloche

Congreso; Massive stars and supernovae; 2018

WR16 is one of the Wolf-Rayet stars exhibiting a very conspicuous round optical nebula, composed of mass ejected in the RSG or LBV phase of the star, and an outer arc-like feature. In this work we present a study of the molecular gas related to this nebula using observations carried out with the ASTE telescope. We observed the CO(3-2) and HCO+(4-3) lines in a region of 12´ x 12´, centered on the star. From the analysis of these data we found and characterize seven clumps located around the nebula. The nebula around WR16 is also detected in the infrared, in the 22 and 70 microns bands, as revealed by the WISE and Herschel images. A study of the dust properties is also presented.