| Name: Sumi Bhattacharjee |
| Affiliation: Assam University, Silchar |
| Conference ID: ASI2026_637 |
| Title: Study of Radial Variation of Extinction in outer periphery and core region of Dark Clouds. |
| Abstract Type: Poster |
| Abstract Category: Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Author(s) and Co-Author(s) with Affiliation: Sumi Bhattacharjee(Assam University, Silchar-788011, India), Asoke Kumar Sen(Assam University, Silchar, Silchar-788011, India) |
| Abstract: Dark molecular clouds are isolated, compact regions in the interstellar medium that appear as dark spots in contrast to the bright stellar background. Clemens and Bravainis (Clemens, D. P., & Barvainis, R. 1988, ApJS, 68, 257) ' clouds represent such regions of compact and isolated dark clouds.
Within the sample of 248 clouds, we identify 48 clouds which have isolated and well-defined shapes. For, these selected clouds reliable distance estimates of are collected from existing literature; the distances to the stars along the line of sight are obtained from the Gaia catalogue. Near-infrared extinction measurements are taken from the 2MASS catalogue.
By integrating these data sets, we examine the radial variation of extinction across each cloud. Our analysis reveals a gradual systematic increase of extinction from the cloud’s outer peripheral regions towards the dense cloud cores. The observed extinction profiles can be well predicted by using mathematical models incorporating distance and other relevant physical parameters.
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