Abstract Details
| Name: Tapas Baug Affiliation: Tata Institute of Fundamental Research Conference ID: ASI2015_458 Title : Multi-wavelength study of the star-forming region Sh-138. Authors and Co-Authors : D.K. Ojha and K.K. Mallick, Tata Institute of Fundamental Research. Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We have performed spectroscopic and photometric study of the star-forming region Sh 138. We obtained optical, near-infrared (NIR) and radio observations of the region using HCT and GMRT. The optical and NIR spectroscopic and photometric observations were carried out using HFOSC and TIRSPEC, respectively. We have detected about 400 and 500 sources, in the optical VRI and NIR JHKs bands respectively, in the central 4X4 square-arcmin region (implies to 5.8X5.8 square-pc in the sky plane). In an earlier study, Deharveng et al (1999) detected one young stellar object (YSO) in this region. But they concluded that there are possibly four O-B2 stars which are ionizing the region and this region is as complex as Orion Nebula. We could identify two YSOs using slit-less spectra in narrow H-alpha band and both of them shows spectral types earlier than B0 in our analysis. The optical and NIR spectra of bright YSO show strong hydrogen lines in emission. Another YSO is in the fainter regime to record any spectra. A neutral hydrogen map has been developed from the observed radio data. Spitzer infrared spectra (Spitzer-IRS) of this region show ArII, ArIII, SIV and NeII emission lines. A detail analysis of this region is in progress and final results will be presented. |