The local environment of flat galaxies
Suman Sarkar, Arunima Banerjee, and Dmitry Makarov

TL;DR
This study investigates the environments of flat galaxies, finding they tend to reside in sparser regions compared to non-flat galaxies, which has implications for understanding their formation and evolution.
Contribution
It introduces a novel analysis of the local geometrical environments of flat galaxies using the 'local dimension' metric, comparing them with non-flat and superthin galaxies.
Findings
Flat galaxies are located in relatively sparser environments than non-flat galaxies.
The environments of flat and non-flat galaxies are statistically different at >99% confidence.
Superthin flat galaxies reside in even more under-dense environments compared to other flat galaxies.
Abstract
The existence of flat or bulgeless galaxies poses a challenge to the hierarchical structure formation scenario advocated by modern cosmology. We determine the geometrical environment of a sample of flat galaxies from the Revised Flat Galaxy Catalog (RFGC) using `local dimension' , which, on a given length scale, quantifies the dimension of the cosmic structure in which a galaxy is embedded. For galaxies residing in filaments, nodes and sheets, , and respectively; represents field galaxies. We also determine the local dimensions of a sample of 15,622 non-flat galaxies identified in the Galaxy Zoo project from the Sloan Digital Sky Survey (SDSS). We find that the median values of for the flat and the non-flat galaxies are and respectively, implying that flat galaxies are located in a relatively sparser environment…
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.
Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena
