Abstract Details
| Name: Gulafsha Choudhury Affiliation: Assam University, Silchar Conference ID: ASI2019_263 Title : Study of Magnetic Field Geometry of Some Star Forming Clouds Authors and Co-Authors : Gulafsha Begom Choudhury Tanuj Kumar Dhar Himadri Sekhar Das Biman J. Medhi Abstract Type : Oral Abstract Category : Stars, ISM and Galaxy Abstract : Polarimetric study of dark clouds makes it possible to map the magnetic field geometry onto the plane of the sky as well as to scale the magnetic field structure. In this study, three nearby clouds viz. CB17, CB24, and CB27 are studied in optical wavelength in order to map the magnetic field over that region of the sky in a wide field of view. The optical polarimetric observations of CB17, CB24, and CB27 in R-band are carried out from 1.04-meter Sampurnanand Telescope, ARIES, Nainital, India on 9th March 2016, 22nd and 23rd December 2017 respectively. These clouds are situated at galactic latitudes of b=3.39⁰ (CB17), b=5.90⁰ (CB24) and b=-5.18⁰ (CB27), lying almost along the same galactic plane. From the optical polarimetric study of these clouds, we have found a very interesting result that the local magnetic field of all the three clouds are aligned along the orientation of galactic magnetic field over that region of the sky, which shows that the galactic magnetic field is very much dominating over a large range of that region of the sky. In literature, two more nearby clouds at the same galactic latitude viz. CB25 (b=5.84⁰) and CB26 (b=5.99⁰) are found to have the same dominance of galactic magnetic field over the local magnetic fields of these clouds. |