A spectroscopic study of the low redshift dwarf galaxy SDSS J134326.99+431118.7 to calculate star formation rate

Authors

  • Daya Nidhi Chhatkuli Central Department of Physics, Tribhuvan University https://orcid.org/0000-0002-8040-6902
  • Sanjaya Paudel Research Professor, Younsei University, Seoul, South Korea
  • Binil Aryal Central Department of Physics, T. U.

DOI:

https://doi.org/10.3126/bibechana.v18i1.29466

Keywords:

Dwarf galaxy, Star formation rate, Characteristic peaks, H_α line

Abstract

We present a spectroscopic study of an interacting emission-line dwarf galaxy SDSS J134326.99+431118.7. We analyzed eight-strong emission lines of wavelength in a range of 3902.1Å to 6619.1Å. Among them, the strongest emission line is OIII, with an intensity of 1043.6 x 10-17 erg/s/cm2/Å. These characteristic lines show a perfect Gaussian fit with a coefficient of regression greater than 98%, where the derived full width half maximum (FWHM) is less than 3.8 Å. The line ratio between Ha  and Hb, (Ha/ Hb), is  2.73. This suggests that the galaxy is a starburst galaxy. Star Formation Rate (SFR) of the galaxy derived from Ha  emission line flux is 0.019  and emission line metallicity derived from flux ratio between NII and Ha is 7.85 dex. These morphological and physical properties of SDSSJ134326.99+431118.7 are very similar to those of a typical Blue Compact Dwarf (BCD) galaxy. We conclude that we have presented another evidence of forming a BCD-type galaxy through a merger.

BIBECHANA 18 (1) (2021) 100-107

Downloads

Download data is not yet available.
Abstract
476
pdf
311

Author Biographies

Sanjaya Paudel, Research Professor, Younsei University, Seoul, South Korea

Research Professor, Department of Physics, Younsei University.

Binil Aryal, Central Department of Physics, T. U.

Professor of Physics, CDP

Downloads

Published

2021-01-01

How to Cite

Chhatkuli, D. N., Paudel, S., & Aryal, B. (2021). A spectroscopic study of the low redshift dwarf galaxy SDSS J134326.99+431118.7 to calculate star formation rate. BIBECHANA, 18(1), 100–107. https://doi.org/10.3126/bibechana.v18i1.29466

Issue

Vol. 18 No. 1 (2021)

Section

Research Articles

License

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator.