A new isolated dSph galaxy near the Local Group
I. D. Karachentsev, L. N. Makarova, D. I. Makarov, R. B. Tully, L., Rizzi
TL;DR
This paper reports the discovery and detailed analysis of a newly identified isolated dwarf spheroidal galaxy near the Local Group, including its distance, stellar mass, and star formation history based on HST observations.
Contribution
It provides the first detailed observational characterization of the galaxy KKs 3, including its distance, luminosity, stellar mass, and star formation history, highlighting its isolation.
Findings
Distance of 2.12 Mpc measured via TRGB method
Most stars formed over 12 Gyr ago
Total stellar mass of 2.3×10^7 solar masses
Abstract
Observations of the highly isolated dwarf spheroidal galaxy KKs 3 = [KK2000] 03 with the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) are presented. We measured the galaxy distance of Mpc using the Tip of Red Giant Branch (TRGB) method. The total blue absolute magnitude of the galaxy is estimated as mag. We briefly discuss the star formation history of KKs 3 derived from its colour-magnitude diagram. According to our calculation, the total stellar mass of the galaxy is , and most stars (74\%) were formed at an early epoch more than 12 Gyr ago. A full description of the properties of the colour-magnitude diagram requires some extension of star formation in metallicity and age.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.