Articles written in Journal of Astrophysics and Astronomy
Volume 34 Issue 3 September 2013 pp 247-257
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 H𝛼 filter with this telescope on a Wolf–Rayet dwarf galaxy Mrk 996. The instrumental response and the H𝛼 sensitivity obtained with the telescope are (3.3 ± 0.3) × 10-15 erg s-1 cm-2/counts s-1 and 7.5 × 10-17 erg s-1 cm-2 arcsec-2 respectively. The H𝛼 flux and the equivalent width for Mrk 996 are estimated as (132 ± 37) × 10-14 erg s-1 cm-2 and ∼ 96 Å respectively. The star formation rate is estimated as 0.4 ± 0.1𝑀⊙ yr-1. 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 Hα emission is found in a disk shape which is misaligned with respect to the old stellar disk. This misalignment is indicative of a recent tidal interaction in the galaxy. We believe that galaxy–galaxy tidal interaction is the main cause of the WR phase in Mrk 996.
Volume 40 | Issue 6
Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.
Click here for Editorial Note on CAP Mode