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SDSS J134313.15+364457.5: Forming Compact Elliptical through the Merger KCI 등재 SCOPUS

  • 언어ENG
  • URLhttps://db.koreascholar.com/Article/Detail/440694
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천문학회지 (Journal of The Korean Astronomical Society)
한국천문학회 (Korean Astronomical Society)
초록

Scaling relations are fundamental tools for exploring the morphological properties of galaxies and understanding their formation and evolution. Typically, galaxies follow a scaling relation between mass and size, measured by effective radius. However, a compact class of galaxies exists as outliers from this relation, and the origin of these compact galaxies in the local universe remains unclear. In this study, we investigate the compact dwarf galaxy SDSS J134313.15+364457.5 (J1343+3644), which is the result of a merger. Our analysis reveals that J1343+3644 has a half-light radius of 482 pc, significantly smaller than typical galaxies with the same brightness (Mr = −19.17 mag). With a high star-formation rate (SFR) of 0.87 M⊙ year−1, J1343+3644 is expected to evolve into a compact elliptical galaxy in a few million years. J1343+3644 could, therefore, be a progenitor of a compact elliptical galaxy. The phenomenon happened in early universe, where compact galaxies were common.

목차
Introduction
Data Analysis
    Sample Selection
    Imaging Analysis
    Size of the Galaxy
    Spectroscopic Measurement
Conclusion and Discussion
    Future Evolution of J1343+3644
Acknowledgments
References
저자
  • Daya Nidhi Chhatkuli(Department of Physics, Tri-Chandra Multiple Campus, Tribhuvan University, Nepal)
  • Sanjaya Paudel(Department of Astronomy, Yonsei University, Seoul 03722, Republic of Korea, Nepal Astronomical Society, Kathmandu, Nepal) Corresponding author
  • Binil Aryal(Central Department of Physics, Tribhuvan University, Kirtipur, Nepal)
  • Binod Adhikari(Patan Multiple Campus, Tribhuvan University, Lalitpur, Nepal)
  • Nau Raj Pokhrel(Department of Physics and Astronomy, The University of Tennessee, Knoxville, TN 37996, USA)
  • Rajendra Adhikari(Amrit Science Campus, Tribhuvan University, Kathmandu, Nepal)