2018A&A...615A.105M

Query : 2018A&A...615A.105M

2018A&A...615A.105M - Astronomy and Astrophysics, volume 615A, 105-105 (2018/7-1)

The Leo-I group: new dwarf galaxy and ultra diffuse galaxy candidates.

MULLER O., JERJEN H. and BINGGELI B.

Abstract (from CDS):


Context. The study of dwarf galaxies and their environments provides crucial test beds for predictions of cosmological models and insights into the structure formation on small cosmological scales. In recent years, many problems on the scale of groups of galaxies has challenged the current standard model of cosmology.
Aims. Our aim is to increase the sample of known galaxies in the Leo-I group, which contains the M 96 subgroup and the Leo Triplet. This galaxy aggregate is located at the edge of the Local Volume at a mean distance of 10.7Mpc.
Methods. We employed image enhancing techniques to search for low surface brightness objects in publicly available gr images taken by the Sloan Digital Sky Survey within 500 square degrees around the Leo-I group. Once detected, we performed surface photometry and compared their structural parameters to other known dwarf galaxies in the nearby universe.
Results. We found 36 new dwarf galaxy candidates within the search area. Their morphology and structural parameters resemble known dwarfs in other groups. Among the candidates five or six galaxies are considered as ultra diffuse galaxy candidates. If confirmed, they would be some of the closest examples of this galaxy type. We assessed the luminosity function of the Leo-I group and find it to be considerably rich in dwarf galaxies, with twice the number of galaxies as the Local Group at a limiting magnitude of MV=-10 and a steeper faint-end slope.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: groups: individual: Leo-I - galaxies: dwarf - galaxies: photometry - galaxies: luminosity function, mass function

Nomenclature: Tables A.1-A.2: [MJB2018] dwHHMM+DDa N=36. Table A.3: [MJB2018] NGC3607 NN (Nos 1-20).

CDS comments: LVJ1149+1715 not in SIMBAD.

Simbad objects: 153

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Number of rows : 153
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 3 AG? 00 07 16.7979771288 +08 18 05.976561384   14.6       ~ 30 0
2 NGC 2 GiP 00 07 17.1156038208 +27 40 42.034864476   14.8       ~ 44 0
3 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3338 2
4 NGC 2784 EmG 09 12 19.497 -24 10 21.36 12.02 10.99 10.16 9.30   ~ 141 1
5 NAME M 81-82 Group GrG 09 55 +69.1           ~ 717 0
6 UGC 5456 AG? 10 07 20.182 +10 21 40.16   13.78   13.24   ~ 114 0
7 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1208 1
8 AGC 208693 G 10 13 29.0 +18 36 44           ~ 4 0
9 SDSS J103052.90+122647.9 AG? 10 30 52.909 +12 26 47.95           ~ 13 0
10 SDSS J103456.12+112932.5 AG? 10 34 56.131 +11 29 32.49           ~ 17 0
11 NGC 3299 GiG 10 36 23.861 +12 42 27.10   13.60   12.64   ~ 88 0
12 SDSS J103704.93+152016.9 AG? 10 37 04.939 +15 20 16.96           ~ 13 0
13 [MJB2018] dw1037+09 G? 10 37 40.7 +09 06 20           ~ 2 0
14 Z 65-74 AG? 10 38 07.9993294512 +10 22 50.866504968   15.1       ~ 24 0
15 [KK2004] LeG 4 GiG 10 39 40.2 +12 44 06           ~ 10 0
16 LEDA 83286 GiG 10 39 42.9 +12 38 03   16.77       ~ 16 0
17 LEDA 31727 GiG 10 39 55.678 +13 54 31.26           ~ 23 0
18 [MJB2018] dw1040+06 G? 10 40 30.3 +06 56 28           ~ 1 0
19 UGC 5812 GiG 10 40 56.706 +12 28 25.89   15.6       ~ 33 0
20 LEDA 83319 GiG 10 42 00.368 +12 20 05.73   15.85       ~ 26 0
21 [CVD2018] M96-DF3 LSB 10 42 34.6 +12 09 02     16.5   16.1 ~ 12 0
22 2MASX J10432995+1205159 GiP 10 43 29.9372176968 +12 05 15.766686168   15.2       ~ 26 0
23 [KK2004] LeG 10 LSB 10 43 55.4 +12 08 07           ~ 10 0
24 M 95 GiP 10 43 57.7313485800 +11 42 13.301191332 10.71 10.51 9.73 9.48   ~ 1122 2
25 [KK2004] LeG 11 LSB 10 44 02.1 +15 35 20           ~ 10 0
26 [KK2004] LeG 12 GiG 10 44 07.8 +11 31 59           ~ 9 0
27 [MJB2018] dw1044+11 G? 10 44 33.0 +11 16 10           ~ 2 0
28 SDSS J104435.27+135622.7 AG? 10 44 35.276 +13 56 22.75           ~ 11 0
29 LEDA 83326 GiG 10 44 57.490 +11 54 57.72   17.43       ~ 27 0
30 [MJB2018] dw1045+14a G? 10 45 00.6 +14 06 20           ~ 2 0
31 MATLAS-735 G 10 45 56.3 +14 13 39           ~ 3 0
32 [MJB2018] dw1045+16 G? 10 45 56.3 +16 55 00           ~ 3 0
33 MATLAS-736 G 10 45 58.2 +13 32 52           ~ 3 0
34 LEDA 83329 LSB 10 46 14.0309 +12 57 40.079   18.7 17.8   17.4 ~ 19 0
35 LEDA 83333 LSB 10 46 24.6 +14 01 29   18.3 16.8   16.4 ~ 19 0
36 AGC 202026 GiG 10 46 30.2 +11 45 21   19.0       ~ 12 0
37 LEDA 83336 GiG 10 46 41.316 +12 19 37.37   16.98       ~ 21 0
38 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 819 1
39 NAME Leo dwA LSB 10 46 52.9 +12 44 32     16.6   16.4 ~ 29 0
40 LEDA 83338 LSB 10 46 54.61272 +12 47 17.5380   18.2       ~ 18 0
41 MATLAS-746 LSB 10 46 57.6 +12 59 56   17.5 16.6   16.1 ~ 19 0
42 [MJB2018] dw1047+16 G? 10 47 00.0 +16 08 50           ~ 2 0
43 AGC 201975 GiG 10 47 00.5 +12 57 38           ~ 14 0
44 UGC 5889 GiP 10 47 22.4012897592 +14 04 16.697296020 14.17 14.31 13.61 13.51   ~ 141 1
45 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 775 1
46 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1463 0
47 NAME M96 Group GrG 10 48 +13.3           ~ 314 0
48 NGC 3384 GiG 10 48 16.8855574392 +12 37 45.371165844   10.0       ~ 596 1
49 MATLAS-758 LSB 10 48 35.8 +13 03 36     17.8   17.5 ~ 5 0
50 2MASX J10485371+1407277 GiG 10 48 53.7517756752 +14 07 28.264253520   15.5       ~ 20 0
51 MATLAS-766 G 10 49 11.4 +12 47 34           ~ 3 0
52 [MJB2018] dw1049+15 G? 10 49 14.3 +15 58 20           ~ 2 0
53 MATLAS-771 LSB 10 49 25.9 +12 33 09     18.2   17.8 ~ 5 0
54 LEDA 83355 LSB 10 49 37.7 +11 21 04   18.0       ~ 12 0
55 MATLAS-780 GiG 10 50 09.0 +13 29 02           ~ 10 0
56 UGC 5944 LSB 10 50 18.960 +13 16 18.69   15.7       ~ 33 0
57 LEDA 166107 LSB 10 50 27.2 +12 21 35     16.5   16.0 ~ 17 0
58 NGC 3412 GiG 10 50 53.2803559464 +13 24 43.721664876 11.84 11.45 10.54     ~ 238 1
59 [MJB2018] dw1051+11 G? 10 51 03.8 +11 01 13           ~ 2 0
60 [KK2004] LeG 26 GiG 10 51 21.1 +12 50 57           ~ 10 0
61 SDSS J105131.35+140653.2 AG? 10 51 31.345 +14 06 53.17           ~ 12 0
62 SDSS J105204.79+150149.7 AG? 10 52 04.791 +15 01 49.65           ~ 13 0
63 LEDA 1388083 AG? 10 52 19.504 +11 02 35.54           ~ 14 0
64 [KK2004] LeG 27 GiG 10 52 20.1 +14 42 26           ~ 9 0
65 [KK2004] LeG 28 LSB 10 53 00.7 +10 22 45           ~ 10 0
66 [MJB2018] dw1055+11 G? 10 55 43.5 +11 58 05           ~ 3 0
67 ESDO 640-12 GiG 10 55 57.1 +12 20 20           ~ 12 0
68 LEDA 87256 LSB 10 56 13.913 +12 00 40.68   17.66       ~ 31 0
69 Z 95-78 AG? 10 58 02.238 +19 30 19.05   15.6       ~ 13 0
70 ESDO 640-14 GiG 10 58 10.5 +11 59 57           ~ 10 0
71 LEDA 87170 LSB 10 58 51.953 +14 07 48.26   17.15       ~ 22 0
72 [MJB2018] dw1059+11 G? 10 59 50.9 +11 25 38           ~ 3 0
73 NGC 3489 GiG 11 00 18.5483994744 +13 54 04.206202668 11.46 11.12 10.29     ~ 400 1
74 MATLAS-846 LSB 11 00 45.1 +14 10 22           ~ 12 0
75 LEDA 87258 LSB 11 00 51.936 +13 52 52.77   16.96       ~ 18 0
76 [MJB2018] dw1101+11 G? 11 01 22.5 +11 45 12           ~ 3 0
77 LEDA 33447 LSB 11 04 26.481 +11 45 22.87   15.7       ~ 29 0
78 [MJB2018] dw1109+18 G? 11 09 08.5 +18 54 22           ~ 1 0
79 [MJB2018] dw1110+18 G? 11 10 54.9 +18 58 52           ~ 1 0
80 MATLAS-869 G 11 14 22.5 +18 02 39           ~ 2 0
81 [MJB2018] NGC3607 2 G? 11 14 26.0 +18 22 30           ~ 1 0
82 NGC 3593 GiG 11 14 36.9731893800 +12 49 05.497790664   11.8       ~ 359 2
83 LEDA 4000549 AG? 11 14 45.019 +12 38 51.70           ~ 18 0
84 NGC 3596 H2G 11 15 06.2081129496 +14 47 13.284196332   12.01 11.49 10.99 10.45 ~ 203 0
85 NGC 3599 GiP 11 15 26.9494646448 +18 06 37.428503940   13.0       ~ 208 0
86 [MJB2018] NGC3607 3 G? 11 15 35.0 +18 25 21           ~ 1 0
87 MATLAS-879 G 11 15 36.3 +18 01 07           ~ 2 0
88 MATLAS-881 G 11 15 48.1 +18 04 44           ~ 2 0
89 [MJB2018] NGC3607 6 G? 11 15 52.0 +17 54 04           ~ 1 0
90 MATLAS-885 G 11 15 57.5 +17 56 26           ~ 2 0
91 ESDO 570-05 G? 11 16 11.6 +17 57 13           ~ 4 0
92 [MJB2018] dw1116+14 G? 11 16 14.4 +14 38 21           ~ 1 0
93 [MJB2018] dw1116+15a G? 11 16 17.1 +15 04 02           ~ 1 0
94 [MJB2018] NGC3607 9 G? 11 16 18.0 +18 35 39           ~ 1 0
95 [MJB2018] NGC3607 10 G? 11 16 28.0 +18 11 35           ~ 1 0
96 MATLAS-889 G 11 16 30.2 +18 19 30           ~ 2 0
97 [MJB2018] dw1116+15b G? 11 16 46.4 +15 54 19           ~ 1 0
98 NGC 3605 GiG 11 16 46.5896102400 +18 01 01.777666908   12.7       ~ 253 0
99 [VV2006] J111654.8+180304 QSO 11 16 54.7 +18 03 06   13.84 12.76     ~ 467 0
100 NGC 3608 LIN 11 16 58.967 +18 08 54.71   11.7       ~ 508 0
101 [MJB2018] NGC3607 12 G? 11 17 01.0 +18 18 07           ~ 1 0
102 IC 2684 GiC 11 17 01.049 +13 05 58.69   15.4       ~ 27 0
103 [MJB2018] dw1117+15 G? 11 17 02.1 +15 10 17           ~ 2 0
104 [MJB2018] NGC3607 13 G? 11 17 07.0 +17 19 09           ~ 1 0
105 [MJB2018] NGC3607 14 G? 11 17 16.0 +18 46 27           ~ 1 0
106 MATLAS-901 G 11 17 22.5 +17 59 54           ~ 2 0
107 [MJB2018] dw1117+12 G? 11 17 44.2 +12 50 10           ~ 1 0
108 [MJB2018] dw1118+13a G? 11 18 15.9 +13 30 53           ~ 1 0
109 LEDA 86629 GiC 11 18 21.40 +17 41 51.0           ~ 16 0
110 [MJB2018] dw1118+13b G? 11 18 53.3 +13 48 18           ~ 1 0
111 M 65 GiP 11 18 55.9084654776 +13 05 32.300703672   9.6       ~ 445 1
112 NAME Leo Triplet IG 11 19 +13.2           ~ 124 1
113 [MJB2018] NGC3607 17 G? 11 19 13.0 +18 05 47           ~ 1 0
114 SDSS J111915.87+141724.7 AG? 11 19 15.870 +14 17 24.77           ~ 8 0
115 [MJB2018] NGC3607 18 G? 11 19 21.0 +17 32 09           ~ 1 0
116 NGC 3626 GiG 11 20 03.8069651160 +18 21 24.543304164   11.2       ~ 258 0
117 M 66 GiP 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1386 4
118 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 827 3
119 [JMK2016] NGC 3628-DGSAT-1 LSB 11 21 37.00 +13 26 50.7           ~ 2 0
120 LEDA 1420152 AG? 11 22 24.0247231800 +12 58 46.365148920           ~ 14 0
121 LEDA 2807140 G 11 23 03.5 +21 19 37           ~ 10 0
122 IC 2787 GiG 11 23 19.077 +13 37 47.20   15.5       ~ 38 0
123 IC 2791 AG? 11 23 37.617 +12 53 44.82           ~ 15 0
124 [MJB2018] dw1123+13 G? 11 23 56.4 +13 46 41           ~ 1 0
125 [MJB2018] NGC3607 19 G? 11 24 08.0 +18 13 16           ~ 1 0
126 AGC 215415 G 11 24 34.2 +12 40 40           ~ 4 0
127 [MJB2018] dw1127+13 G? 11 27 13.0 +13 46 50           ~ 1 0
128 SDSS J112934.60+104835.4 AG? 11 29 34.6099091664 +10 48 35.366101092           ~ 6 0
129 LEDA 5807940 G 11 30 32.0 +20 45 41           ~ 5 0
130 LEDA 2807141 GiC 11 30 53.432 +14 08 39.38           ~ 17 0
131 [MJB2018] NGC3607 20 G? 11 31 01.0 +15 54 48           ~ 1 0
132 [MJB2018] dw1131+15 G? 11 31 01.0 +15 54 52           ~ 1 0
133 AGC 212838 LSB 11 34 53.115 +11 01 16.16   17.0       ~ 20 0
134 [MJB2018] dw1137+16 G? 11 37 45.6 +16 31 09           ~ 4 0
135 [MJB2018] dw1140+17 G? 11 40 43.0 +17 38 33           ~ 1 0
136 [MJB2018] dw1145+14 G? 11 45 32.1 +15 52 50           ~ 1 0
137 [MJB2018] dw1148+12 G? 11 48 09.1 +12 48 47           ~ 1 0
138 AGC 219539 G 11 48 45.0 +16 44 24           ~ 6 0
139 [MJB2018] dw1151+16 G? 11 51 15.2 +16 00 20           ~ 1 0
140 SDSS J115412.42+122606.3 G 11 54 12.423 +12 26 06.31           ~ 16 0
141 NAME CVn I Group GrG 12 32 48.3 +33 57 07           ~ 142 0
142 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1068 2
143 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4805 2
144 M 63 LIN 13 15 49.2741893928 +42 01 45.728076108   9.34 8.59 8.35   ~ 1224 2
145 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4486 3
146 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4330 4
147 NAME M101 Group GrG 14 03 +54.3           ~ 102 1
148 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2916 2
149 NGC 5485 LIN 14 07 11.3594809920 +55 00 06.084219996 14.34 13.82 12.22     ~ 250 0
150 NAME Leo Ring HI ~ ~           ~ 59 0
151 NAME NGC 2784 Group GrG ~ ~           ~ 9 0
152 NAME Local Group GrG ~ ~           ~ 8394 0
153 NAME Leo Cloud Cld ~ ~           ~ 61 0

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