2018MNRAS.478..667P

Query : 2018MNRAS.478..667P

2018MNRAS.478..667P - Mon. Not. R. Astron. Soc., 478, 667-681 (2018/July-3)

Automated detection of very low surface brightness galaxies in the Virgo cluster.

PROLE D.J., DAVIES J.I., KEENAN O.C. and DAVIES L.J.M.

Abstract (from CDS):

We report the automatic detection of a new sample of very low surface brightness (LSB) galaxies, likely members of the Virgo cluster. We introduce our new software, DeepScan, that has been designed specifically to detect extended LSB features automatically using the DBSCAN algorithm. We demonstrate the technique by applying it over a 5 deg2 portion of the Next Generation Virgo Survey (NGVS) data to reveal 53 LSB galaxies that are candidate cluster members based on their sizes and colours. 30 of these sources are new detections despite the region being searched specifically for LSB galaxies previously. Our final sample contains galaxies with 26.0 <= <µe> <= 28.5 and 19 <= mg <= 21, making them some of the faintest known in Virgo. The majority of them have colours consistent with the red sequence, and have a mean stellar mass of 10^6.3 ± 0.5^ M☉ assuming cluster membership. After using ProFit to fit Sersic profiles to our detections, none of the new sources have effective radii larger than 1.5 Kpc and do not meet the criteria for ultra-diffuse galaxy (UDG) classification, so we classify them as ultra-faint dwarfs.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: clusters individual: Virgo - methods: observational - galaxies: dwarf - galaxies: clusters

Nomenclature: Fig. B1, Appendix C: [PDK2018] VLSBNN (Nos VLSB1-VLSB39).

Simbad objects: 45

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Number of rows : 45
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 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
2 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
3 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
4 [PDK2018] VLSB6 LSB 12 30 58.2412905936 +11 58 28.667535204           ~ 2 0
5 LEDA 41384 LSB 12 30 58.8123 +11 42 30.790   21       ~ 19 0
6 [PDK2018] VLSB9 LSB 12 31 47.8636 +12 18 21.549           ~ 4 0
7 [PDK2018] VLSB8 LSB 12 32 16.96 +12 07 32.7           ~ 1 0
8 [PDK2018] VLSB1 LSB 12 32 26.5260 +11 37 20.660           ~ 4 0
9 [PDK2018] VLSB4 LSB 12 32 29.9588 +11 50 01.328   20.03       ~ 6 0
10 [PDK2018] VLSB3 LSB 12 32 32.4751 +11 42 00.299           ~ 4 0
11 [PDK2018] VLSB7 LSB 12 33 10.1677 +12 05 09.936           ~ 6 0
12 NGVS J123315.73+115207.0 LSB 12 33 15.7289 +11 52 07.002           ~ 7 0
13 [PDK2018] VLSB2 LSB 12 33 17.1924 +11 37 36.429           ~ 4 0
14 [PDK2018] VLSB10 LSB 12 34 54.98 +11 36 24.7           ~ 1 0
15 SMDG J1235072+113936 LSB 12 35 07.06 +11 39 37.6   20.00       ~ 4 0
16 SMDG J1235340+115500 LSB 12 35 33.98 +11 54 59.5           ~ 3 0
17 [PDK2018] VLSB12 LSB 12 36 03.25 +11 42 36.9           ~ 1 0
18 [PDK2018] VLSB15 LSB 12 36 18.14 +11 57 12.1   19.82       ~ 3 0
19 SMDG J1236546+115040 LSB 12 36 54.6 +11 50 42   20.8     19.0 ~ 4 0
20 [PDK2018] VLSB16 LSB 12 37 34.30 +12 06 27.4           ~ 1 0
21 SMDG J1238263+113911 LSB 12 38 26.36 +11 39 11.2   21.15     19.6 ~ 5 0
22 [GKP2005] 108 LSB 12 38 44.4 +11 56 55   21.4     19.7 ~ 2 0
23 [PDK2018] VLSB24 LSB 12 38 47.03 +12 14 17.0   21.28       ~ 3 0
24 [GKP2005] 110 LSB 12 39 01.8 +12 12 13   20.8     19.1 ~ 3 0
25 SMDG J1239574+120647 LSB 12 39 57.47 +12 06 47.4   20.38     17.8 ~ 6 0
26 [PDK2018] VLSB19 LSB 12 40 04.26 +11 50 09.7           ~ 1 0
27 SMDG J1240579+113612 LSB 12 40 57.95 +11 36 10.2           ~ 3 0
28 [PDK2018] VLSB21 LSB 12 41 00.81 +12 02 18.7           ~ 1 0
29 [PDK2018] VLSB25 LSB 12 41 01.25 +12 16 49.3           ~ 1 0
30 LEDA 42572 LSB 12 41 30.808 +11 40 55.51   19.68     18.3 ~ 9 0
31 [PDK2018] VLSB34 LSB 12 42 12.68 +12 22 33.4           ~ 1 0
32 [PDK2018] VLSB29 LSB 12 42 47.87 +11 41 55.1           ~ 1 0
33 [PDK2018] VLSB27 LSB 12 43 17.11 +11 37 41.4   19.53       ~ 2 0
34 SMDG J1243355+121926 LSB 12 43 35.57 +12 19 26.8           ~ 3 0
35 NGVS J124410.20+113443.2 LSB 12 44 10.1924211168 +11 34 43.197318696           ~ 4 0
36 [PDK2018] VLSB33 LSB 12 44 18.29 +12 20 09.3           ~ 1 0
37 [PDK2018] VLSB30 LSB 12 44 24.52 +11 56 36.5           ~ 1 0
38 [PDK2018] VLSB28 LSB 12 45 05.59 +11 40 04.7           ~ 1 0
39 SMDG J1245163+121453 LSB 12 45 16.32 +12 14 53.7   19.45     17.8 ~ 6 0
40 [GKP2005] 178 LSB 12 46 46.51 +11 39 19.5   20.91     18.7 ~ 4 0
41 [PDK2018] VLSB39 LSB 12 46 48.33 +12 11 49.5   19.28       ~ 3 0
42 [PDK2018] VLSB38 LSB 12 46 49.19 +11 56 53.5           ~ 1 0
43 [PDK2018] VLSB35 LSB 12 48 09.45 +11 35 50.0           ~ 1 0
44 [PDK2018] VLSB37 LSB 12 49 08.50 +11 55 11.9           ~ 1 0
45 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2

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