Devasthal Fast Optical Telescope observations of Wolf-Rayet dwarf galaxy Mrk 996
S. Jaiswal, A. Omar

TL;DR
This study reports initial optical observations of the Wolf-Rayet dwarf galaxy Mrk 996 using the Devasthal Fast Optical Telescope, revealing star formation activity, ionized gas morphology, and signs of recent tidal interaction.
Contribution
First use of DFOT with H-alpha filter to study Mrk 996, providing new measurements of star formation rate and gas morphology, and linking tidal interactions to Wolf-Rayet phase.
Findings
Star formation rate estimated at 0.4 solar masses per year.
Ionized gas forms a misaligned disk, indicating recent tidal interaction.
Mrk 996 shows radio deficiency compared to FIR emission.
Abstract
The Devasthal Fast Optical Telescope (DFOT) is a 1.3 meter aperture optical telescope, recently installed at Devasthal, Nainital. We present here the first results using an \Ha filter with this telescope on a Wolf-Rayet dwarf galaxy Mrk 996. The instrumental response and the \Ha sensitivity obtained with the telescope are and respectively. The \Ha flux and the equivalent width for Mrk~996 are estimated as and 96 respectively. The star formation rate is estimated as yr. Mrk~996 deviates from the radio-FIR correlation known for normal star forming galaxies with a deficiency in its radio continuum. The ionized gas as traced by \Ha emission is found in a disk shape which is…
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