SDSS J170745+302056: a low surface brightness galaxy in a group

TL;DR

This study characterizes SDSS J170745+302056 as a typical low surface brightness spiral galaxy, highlighting its properties and its unusual presence in a dense galaxy group environment.

Contribution

It provides a detailed analysis of a low surface brightness galaxy within a group, emphasizing its unique environment and interaction potential.

Findings

Galaxy has exponential surface brightness distribution.

It is part of a group of five galaxies, possibly interacting.

Large low surface brightness galaxy in a dense environment is unusual.

Abstract

On the basis of the SDSS survey and spectral observations with the 6-m telescope of SAO RAS, we have peformed a detailed study of SDSS J170745+302056. By combination of its characteristics -- exponential surface brightness distribution, central surface brightness of stellar disk $\mu_0(B) = 23.25\,^m/\square"$, blue colors, low metallicity and low star formation rate -- the galaxy is a typical low surface brightness spiral galaxy. Exponential scalelength of the galaxy is $\approx$3 kpc, its optical diameter exceeds 20 kpc. SDSS J170745+302056 is a member of a group of five galaxies and probably it is in interaction with UGC 10716. The existence of a large low surface brightness galaxy in such a dense environment is very unusual.