Abstract Details
| Name: Sonu Tabitha Paulson Affiliation: Indian Institute of Space Science and Technology Conference ID: ASI2018_1593 Title : Probing Early Phases of High Mass Stars with 6.7 GHz Methanol Masers Authors and Co-Authors : Jagadheep.D.Pandian Indian Institute of Space Science and Technology Abstract Type : Contributed Talk Abstract Category : Stars,ISM and the Galaxy Abstract : Methanol masers at 6.7 GHz are the brightest of class II methanol masers and have been found exclusively towards massive star forming regions. These masers can thus be used as a unique tool to probe the early phases of massive star formation. Modelling spectral energy distributions (SEDs) of masers is one of the most effective methods to study the nature of massive star formation sites. We present here the SED studies of around 300 methanol masers chosen from the MMB catalogue, which falls in the Hi-GAL range ( |l|≤60◦, |b|≤1◦). The masers are studied using the ATLASGAL, MIPSGAL and Hi-GAL data at wavelengths ranging from 24 - 870 micrometers. A single grey body component fit was used to model the cold dust emission whereas the emission from the warm dust is modelled by a black body. The clump properties such as isothermal mass, FIR luminosity and MIR luminosity were obtained using the best fit parameters of the SED fits. The clump masses range from few ten to 1000 M⊙. The FIR luminosities of the sources associated with 6.7 GHz maser emission falls in the range 500-8920 L⊙. We discuss the physical properties of the sources and ex- plore the evolutionary stages of the sources having 6.7 GHz maser emission in the timeline of high mass star formation. |