2021/01/18 by Kanak Saha, Suraj Dhiwar, Sudhanshu Barway +3
Physics and Astronomy · #Astronomy and Astrophysical Research #Binary star #Brightness #Electrical and Electromagnetic Research #Galaxies: Formation, Evolution, Phenomena #Giant star #Milky Way #Spiral galaxy #Star formation #Stars #Surface brightness #astro-ph.GA
paper · pdf · doi:10.1007/s12036-021-09715-5
15 pages, 10 figures, accepted for publication in the Journal of Astrophysics and Astronomy
arxiv created 2021/01/18 · openalex created_date 2021/02/01 · openalex publication_date 2021/06/29 · arxiv updated 2021/07/07 · openalex updated_date 2026/08/05
Malin 1, being a class of giant low surface galaxies, continues to surprise us even today. The HST/F814W observation has shown that the central region of Malin 1 is more like a normal SB0/a galaxy, while the rest of the disk has the characteristic of a low surface brightness system. The AstroSat/UVIT observations suggest scattered recent star formation activity all over the disk, especially along the spiral arms. The central 9" (∼ 14 kpc) region, similar to the size of the Milky Way's stellar disk, has a number of far-UV clumps - indicating recent star-formation activity. The high resolution UVIT/F154W image reveals far-UV emission within the bar region (∼ 4 kpc) - suggesting the presence of hot, young stars in the bar. These young stars from the bar region are perhaps responsible for producing the strong emission lines such as Hα, [OII] seen in the SDSS spectra. Malin 1B, a dwarf early-type galaxy, is interacting with the central region and probably responsible for inducing the recent star-formation activity in this galaxy.