2019ApJ...878L..16C

Query : 2019ApJ...878L..16C

2019ApJ...878L..16C - Astrophys. J., 878, L16-L16 (2019/June-2)

Using surface brightness fluctuations to study nearby satellite galaxy systems: the complete satellite system of M101.

CARLSTEN S.G., BEATON R.L., GRECO J.P. and GREENE J.E.

Abstract (from CDS):

We use surface brightness fluctuation (SBF) measurements to constrain the distance to low surface brightness (LSB) dwarfs in the vicinity of M101. Recent work has discovered many LSB candidate satellite companions of M101. However, without accurate distances, it is problematic to identify these dwarfs as physical satellites of M101. We use CFHT Legacy Survey data to measure the SBF signal for 43 candidate dwarfs. The data are deep enough that we constrain 33 of these to be unassociated background galaxies by their lack of SBF. We measure high S/N SBF signals for two of the candidate dwarfs, which are consistent with being at the distance of M101. The remaining candidates are too LSB and/or small for their distances to be constrained. Still, by comparison with Local Group dwarfs, we argue that the M101 satellite system is likely now complete down to stellar masses of ∼5 x 105 M☉. We also provide a new SBF distance for the nearby dwarf UGC 8882, which suggests that it might be a physical satellite of M101; however, further study is merited. By constraining the distances to a majority of the candidates using only archival data, our work demonstrates the usefulness of SBF for nearby LSB galaxies and for studying the satellite systems of nearby massive galaxies.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: distances and redshifts - galaxies: dwarf - methods: observational - techniques: photometric

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
4 MCG-06-07-001 G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1894 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 NAME CMa Dwarf Galaxy G 07 12.6 -27 40     -0.1     ~ 203 1
7 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
8 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
9 Z 272-13 AG? 13 54 45.602 +53 54 20.06   14.2       ~ 219 0
10 [BSC2017] Dw 9 LSB 13 55 44.6 +55 08 45           ~ 11 0
11 MCG+09-23-020 LSB 13 57 14.6983598016 +54 06 03.171260340   16.0       ~ 28 0
12 [MVA2014] DF 3 LSB 14 03 05.7 +53 36 56   17.9       ~ 21 0
13 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
14 SMDG J1403450+535638 LSB 14 03 45.0 +53 56 40   18.9       ~ 21 0
15 [KRZ2015] M 101 dwD LSB 14 04 24.6 +53 16 19   19.2       ~ 7 0
16 [MVA2014] DF 5 LSB 14 04 28.1 +55 37 00           ~ 9 0
17 NGC 5474 GiP 14 05 01.608 +53 39 43.95   11.28 10.79     ~ 475 1
18 MATLAS-1708 LSB 14 05 18.1 +54 53 52   20.2       ~ 9 0
19 NGC 5477 AG? 14 05 33.318 +54 27 37.85 13.94 14.36 14.01     ~ 224 1
20 [MVA2014] DF 7 LSB 14 05 47.50 +55 07 57.3   20.4       ~ 13 0
21 [BSC2017] Dw 24 LSB 14 06 48.0 +54 23 36           ~ 2 0
22 SMDG J1406499+534430 LSB 14 06 49.9 +53 44 30   19.2       ~ 17 0
23 NGC 5485 LIN 14 07 11.3594809920 +55 00 06.084219996 14.34 13.82 12.22     ~ 267 0
24 [MVA2014] DF 4 LSB 14 07 33.80 +54 42 39.2   18.8       ~ 14 0
25 [BSC2017] Dw 21 LSB 14 07 56.5 +54 56 03           ~ 3 0
26 [MVA2014] DF 6 LSB 14 08 18.70 +55 11 30.6   20.1       ~ 11 0
27 MATLAS-1752 LSB 14 08 33.7 +55 26 50           ~ 4 0
28 SMDG J1408374+541932 LSB 14 08 37.5 +54 19 31   19.8       ~ 20 0
29 SMDG J1408411+565536 LSB 14 08 41.0 +56 55 38           ~ 6 0
30 [BSC2017] Dw 26 LSB 14 08 50.4 +53 27 24           ~ 3 0
31 [BSC2017] Dw 15 LSB 14 09 17.5 +53 45 30           ~ 3 0
32 [BSC2017] Dw 20 LSB 14 10 01.6 +54 25 11           ~ 2 0
33 [MSB2017] dw1412+56 G? 14 12 11.0 +56 08 31           ~ 5 0
34 NGC 5585 GiG 14 19 48.204 +56 43 44.58   11.73 11.216 11.12 10.123 ~ 455 0
35 MCG+10-21-013 AG? 14 35 24.077 +57 15 21.24   17       ~ 91 0
36 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
37 NAME Local Group GrG ~ ~           ~ 9325 0

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