SDSS J170745+302056: A low-surface-brightness galaxy in a group |
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| Authors: | Email author" target="_blank">V?P?ReshetnikovEmail author S?S?Savchenko A?V?Moiseev O?V?Egorov |
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| Institution: | 1.St. Petersburg State University,St. Petersburg, Peterhof,Russia;2.Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz,Karachai-Cherkessian Republic,Russia;3.Space Research Institute,Russian Academy of Sciences,Moscow,Russia;4.Sternberg Astronomical Institute,Moscow State University,Moscow,Russia |
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| Abstract: | Based on SDSS data and spectroscopic observations with the 6-m BTA telescope at SAO RAS, we have studied the galaxy SDSS J170745+302056. By the set of its characteristics— an exponential brightness distribution, a central stellar disk surface brightness μ0(B) = 23m. 25/—, blue colors, a low metallicity, and a moderate star formation rate—this galaxy belongs to typical low-surfacebrightness spiral galaxies. The exponential scale length of the galaxy’s disk is ≈3 kpc, while its optical diameter exceeds 20 kpc. SDSS J170745+302056 is a member of a group of five galaxies and possibly interacts with the galaxy UGC 10716. The existence of a large low-surface-brightness galaxy in such a dense environment is very unusual. |
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