SDSS J092609.45+334304.1: a nearby unevolved galaxy
S.A. Pustilnik, A.L. Tepliakova, A.Y. Kniazev, J.-M. Martin, A.N., Burenkov

TL;DR
This study characterizes a nearby, extremely metal-poor, low surface brightness dwarf galaxy in the Lynx-Cancer void, revealing its dark matter dominance, young stellar population, and potential for studying galaxy evolution in low-density environments.
Contribution
It provides detailed observational data on an unevolved, metal-poor dwarf galaxy in a void, highlighting its dark matter content and environmental effects on galaxy evolution.
Findings
O/H abundance among the lowest known
High HI to luminosity ratio (~3.0)
Dark matter dominates the galaxy's mass
Abstract
We present the results of observations of the very low surface brightness (VLSB) dwarf galaxy SDSS J092609.45+334304.1 with extreme parameters which indicate its unevolved status. Namely, its value of O/H, derived as an average of that in two adjacent HII regions at the NE edge of the disc, corresponds to the parameter 12+log(O/H)=7.12+-0.02, which is amongst two lowest known. The total HI flux measurement obtained with the Nancay Radio Telescope and the photometric results imply that the galaxy ratio M(HI)/L_B ~3.0, is among the top known in the Local Volume. The galaxy is situated in the region of a nearby underdense region known as the Lynx-Cancer void, where other, unevolved galaxies, including DDO 68, HS 0832+3542 and SAO 0822+3545, are known to be present. The total mass of this almost edge-on VLSB galaxy is ~8.3 times larger than its baryonic mass, implying the dynamical…
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.
