New dwarf galaxy candidates in the sphere of influence of the Local Volume spiral galaxy NGC2683. Issue 3 (9th March 2023)

• Record Type: Journal Article
• Authors: Crosby, Ethan; Jerjen, Helmut; Müller, Oliver; Pawlowski, Marcel; Mateo, Mario; Dirnberger, Markus
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 521:Issue 3(2023)
• Page Start: 4009
• Page End: 4023
• Publication Date: 2023-03-09
• Subjects: galaxies: dwarf -- galaxies: groups: individual: NGC2683 -- galaxies: photometry -- cosmology: observations; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stad645
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We present initial results of a survey of host L * galaxies environments in the Local Volume ($D\lt 10\, $ Mpc) searching for satellite dwarf galaxy candidates using the wide-field Hyper Suprime-Cam imager on the 8 m Subaru Telescope. This paper presents complete results on NGC2683 ($M_{B_T, 0}=-19.62$, $D=9.36\, \mathrm{ Mpc}$, $v_{\odot }=411\, \mathrm{ km\, s}^{-1}$ ), an isolated Sc spiral galaxy in the Leo Spur. At the distance of NGC2683, we image the complete volume out to projected radii of $380\, \mathrm{ kpc}$ using a hexagonal arrangement of 7 pointings. Direct inspection of the images is complete down to Mg ∼ −11 and has revealed four new satellite galaxy candidates, two of which have been independently discovered by other researchers. Assuming the distance of NGC2683, these candidates span luminosities −12 < Mg < −9 and effective radii 150 pc < re < 1100 pc and are found to be morphologically reminiscent of satellite galaxies in the Local Group. These four new candidates add to the eight already known. A principle component analysis of the 2D projected distribution of the 12 satellite galaxies of NGC2683 reveals a flattened projected disc of satellites, with axis ratio b / a = 0.23. This flattening in the 2D projected system of satellites is a 1 per cent outlier of simulated isotropic satellite systems but is mostly consistent with satellite distributions of comparable galaxy environments in the IllustrisTNG simulation. This indicates the possible presence of a satellite plane, which will need to be investigated with follow-up observations.