The infrared and molecular environment surrounding the Wolf-Rayet star WR 130

S. CICHOWOLSKI; L. A. SUAD; S. PINEAULT; A. NORIEGA-CRESPO; E.M. ARNAL; N. FLAGEY

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Lugar: Londres; Año: 2015 vol. 450 p. 3458 - 3471

0035-8711

 We present a multi-wavelength study of the environment of the Wolf-Rayet star WR130 to investigate the molecular and dustdistributions in the context of the neutral hydrogen and radio continuum structures already analyzed by Cichowolski et al. (2001). We also investigate the presence of young stellar object candidates possibly triggered by the action of WR130 onto the molecular gas. We use CO data obtained from the FCRAO survey to analyze the distribution and properties of the molecular gas, andinfrared data from the WISE and Herschel surveys to obtain the dust properties. Candidate young stellar objects are identified fromcataloged point sources (IRAS, MSX and WISE) and compared with the molecular distribution. We then discuss their physicalparameters using their spectral energy distributions. The molecular data show a ring-like structure in the same velocity interval where an Hi shell was detected by Cichowolskiet al. (2001).We have identified and characterized four main molecular clouds. The infrared emission also presents, at all wavelengths,a well defined shell structure.We have identified eight young stellar object candidates distributed mostly in the regions of high columndensity. Among these sources we identified two groups located onto molecular clouds presenting a bright rim, suggesting that theradiative driven implosion (RDI) mechanism may be acting in these clouds. Bearing in mind that WR130 is an evolved star we arguethat the star formation at the edges of the ionized region created by this star might have been triggered.