| Authors : | Vineet Rawat1,2, M. R. Samal1, Chakali Eswaraiah3, Jia-Wei Wang4, Davide Elia5, Sandhyarani Panigrahy3, A. Zavagno6,7, R. K. Yadav8, D. L. Walker9, J. Jose3, D.K. Ojha10, C.P. Zhang11,12, S. Dutta4 |
| Authors Affiliation: | 1 Vineet Rawat, M. R. Samal Physical Research Laboratory, Navrangpura, Ahmedabad, Gujarat 380009, India
2 Vineet Rawat Indian Institute of Technology Gandhinagar Palaj, Gandhinagar 382355, India
3 Chakali Eswaraiah, Sandhyarani Panigrahy, J. Jose Indian Institute of Science Education and Research (IISER) Tirupati, Rami Reddy Nagar, Karakambadi Road, Mangalam (P.O.), Tirupati 517 507, India
4 Jia-Wei Wang, S. Dutta Academia Sinica Institute of Astronomy and Astrophysics, No.1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
5 Davide Elia Istituto di Astrofisica e Planetologia Spaziali, INAF, Via Fosso del Cavaliere 100, I-00133 Roma, Italy
6 A. Zavagno Aix-Marseille Universite, CNRS, CNES, LAM, 38 rue F. Joliot Curie, F-13388 Marseille Cedex 13, France
7 A. Zavagno Institut Universitaire de France, Paris, 1 rue Descartes, F-75231 Paris Cedex 05, France
8 R. K. Yadav National Astronomical Research Institute of Thailand (NARIT), Sirindhorn AstroPark, 260 Moo 4, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand
9 D. L. Walker Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK
10 D.K. Ojha Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005, India
11 C.P. Zhang National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
12 C.P. Zhang Guizhou Radio Astronomical Observatory, Guizhou University, Guiyang 550000, People’s Republic of China |
| Abstract : | The relative importance of magnetic fields, turbulence, and gravity in the early phases of star formation is still not well understood. We studied the initial stages of star formation and the interplay between magnetic fields, turbulence, and gravity at the hub of the Giant Molecular Cloud G148.24+00.41, using high-resolution dust polarization observations at 850 microns. These observations were conducted using the SCUBA-2/POL-2 instrument at the James Clerk Maxwell Telescope (JCMT). We investigate the magnetic field characteristics of two specific regions within this area: the central clump (CC) and the northeastern elongated structure (NES). We determine the magnetic field strengths of CC and NES to be around 24 μG and 20 μG, respectively. In this talk, I will show the comparison of intensity gradients and local gravity vectors with the magnetic field orientations that show the influence of local gravity in driving the gas collapse, and accretion flows towards the clump. I will discuss the gravitational stability and the Alfvenic state of these regions. The Virial analyses and the overall dominance of gravity in comparison to kinetic and magnetic energies in the energy budget of the studied regions of G148.24+00.41 will be discussed. I will also present a comparison with the clumps of other hubs in the context to show the upper hand of gravity over other factors. |
