http://arxiv.org/abs/2101.07002
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″ ($\sim 14$ 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 ($\sim 4$ 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 H$\alpha$, [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.
K. Saha, S. Dhiwar, S. Barway, et. al.
Tue, 19 Jan 21
68/92
Comments: 15 pages, 10 figures, accepted for publication in the Journal of Astrophysics and Astronomy
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