SDSS J114818.18-013823.7: Forming Compact Dwarf Galaxy through the Dwarf-Dwarf Merger

Authors

  • D. N. Chhatkuli
  • S. Paudel
  • A. K. Gautam
  • B. Aryal

DOI:

https://doi.org/10.3126/jnphyssoc.v7i2.38622

Keywords:

Dwarf Galaxy, Emission line, Star Formation Rate, Metallicity, Extinction

Abstract

We studied the spectroscopic properties of the low redshift (z = 0.0130) interacting dwarf galaxy SDSS J114818.18-013823.7. It is a compact galaxy of half-light radius 521 parsec. It’s r-band absolute magnitude is -16.71 mag. Using a publicly available optical spectrum from the Sloan Sky Survey data archive, we calculated star-formation rate, emission line metallicity, and dust extinction of the galaxy. Star formation rate (SFR) due to Hα is found to be 0.118 Mʘ year-1 after extinction correction. The emission-line metallicity, 12+log(O/H), is 8.13 dex. Placing these values in the scaling relation of normal galaxies, we find that SDSS J114818.18-013823.7 is a significant outlier from both size-magnitude relation and SFR-B-band absolute relation. Although SDSS J114818.18-013823.7 possess enhance rate of star-formation, the current star-formation activity can persist several Giga years in the future at the current place and it remains compact.

Downloads

Download data is not yet available.
Abstract
102
PDF
90

Downloads

Published

2021-08-06

How to Cite

Chhatkuli, D. N., Paudel, S., Gautam, A. K., & Aryal, B. (2021). SDSS J114818.18-013823.7: Forming Compact Dwarf Galaxy through the Dwarf-Dwarf Merger. Journal of Nepal Physical Society, 7(2), 49–57. https://doi.org/10.3126/jnphyssoc.v7i2.38622

Issue

Section

Articles