2021A&A...656A..44R

Query : 2021A&A...656A..44R

2021A&A...656A..44R - Astronomy and Astrophysics, volume 656A, 44-44 (2021/12-1)

Discovery and analysis of low-surface-brightness galaxies in the environment of NGC 1052.

ROMAN J., CASTILLA A. and PASCUAL-GRANADO J.

Abstract (from CDS):

The environment of NGC 1052 has recently attracted much attention because of the presence of low-surface-brightness galaxies (LSBGs) with apparently "exotic" properties, making it a region of high interest for the detection of new objects. We used public deep photometric data from the Dark Energy Camera Legacy Survey to carry out a comprehensive search for LSBGs over a wide region of 6 x 6 degrees, equivalent to 2 x 2 Mpc at the distance of NGC 1052. We detected 42 LSBGs with r_eff > 5 arcsec and µ_g(0) > 24 mag arcsec^–2, of which 20 are previously undetected objects. Among all the newly detected objects, RCP 32 stands out with extreme properties: r_eff = 23.0 arcsec and <µ_g> _eff = 28.6 mag arcsec^–2. This makes RCP 32 one of the lowest surface brightness galaxies ever detected through integrated photometry, located at just 10 arcmin from the extensively studied NGC 1052-DF2. We explored the presence of globular clusters (GCs) in the LSBGs. We marginally detected a GC system in RCP 32, and argue that this LSBG is of great interest for follow-up observations given its extremely low baryon density. After analyzing the distribution of galaxies with available spectroscopy, we identified a large-scale structure of approximately 1 Mpc that is well isolated in redshift space and centered on NGC 1052. The spatial correlation analysis between the LSBGs and this large-scale structure suggests their association. However, when exploring the distribution of effective radius, we find an overpopulation of large LSBGs (r_eff > 15 arcsec) located close to the line of sight of NGC 1052. We argue that this is suggestive of a substructure with similar radial velocity in sight projection, but at a closer distance, to which some of these apparently larger LSBGs could be associated. However. possible effects derived from tidal interactions are worthy of further study. Our work expands the catalog of LSBGs with new interesting objects and provides a detailed environmental context for the study of LSBGs in this region.

Abstract Copyright: © ESO 2021

Journal keyword(s): galaxies: dwarf - galaxies: photometry - galaxies: groups: individual: NGC 1052

Nomenclature: Tables 1-2: [RCP2021b] NN (Nos 1-42).

Status at CDS : All or part of tables of objects will be ingested in SIMBAD with priority 1.

Simbad objects: 42

Full paper

View the references in ADS

Number of rows : 42

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	MCG-02-07-007	GiG	02 26 21.458	-09 50 30.25		14.54		13.98	14.7	~	54	0
2	Mrk 1039	GiP	02 27 32.8117078176	-10 09 56.431205028		14.56		13.5	14.0	~	82	0
3	Mrk 1042	GiP	02 28 04.591	-10 10 59.98		16.11				~	21	0
4	MCG-02-07-026	GiG	02 30 25.432	-10 44 55.51		14.77		13.7	14.2	~	25	0
5	LEDA 994632	G	02 31 45.9791358288	-09 08 47.712166440						~	9	0
6	6dFGS gJ023357.1-062134	G	02 33 56.9976153288	-06 21 29.498859324		16.51		15.78	15.6	~	16	0
7	NGC 988	EmG	02 35 27.7649212080	-09 21 21.933984312		11.73		11.01	11.6	~	87	0
8	NGC 991	LSB	02 35 32.6841762360	-07 09 15.862909536		12.36		12.7	12.6	~	148	1
9	[CVD2018] NGC1052-DF7	LSB	02 38 29.8	-07 55 33			18.9		18.6	~	4	0
10	NGC 1022	GiG	02 38 32.703	-06 40 38.60	12.33	12.09	11.34			~	199	1
11	LEDA 4014647	G	02 38 48.503	-08 02 57.73						~	5	0
12	[CVD2018] NGC1052-DF5	LSB	02 39 12.7	-08 08 27			19.3		19.1	~	8	0
13	[CVD2018] NGC1052-DF4	LSB	02 39 15.11	-08 06 58.6			16.5		16.2	~	67	0
14	NGC 1035	EmG	02 39 29.136	-08 08 01.11		12.89		13.0	12.6	~	175	1
15	[CVD2018] NGC1052-DF1	LSB	02 40 04.7	-08 26 46			18.2		17.9	~	6	0
16	NGC 1042	GiP	02 40 23.9724818544	-08 26 00.736256616	11.47	11.56	11.02	11.7	11.4	~	248	1
17	UGCA 38	EmG	02 40 30.5769081216	-06 06 12.943947744		16.43		14.9	15.0	~	17	0
18	NGC 1047	GiP	02 40 32.8417000656	-08 08 51.635714460		14.50				~	58	1
19	[CVD2018] NGC1052-DF8	LSB	02 40 45.5	-07 38 49			19.3		18.9	~	3	0
20	NGC 1051	LSB	02 41 02.4963574872	-06 56 09.116016540		13.0		13.2	13.0	~	49	1
21	NGC 1052	GiP	02 41 04.79849989	-08 15 20.7519527	11.84	11.41	10.47	10.71		~	1253	2
22	NAME NGC 1052 Group	GrG	02 41 09.3	-08 07 10						~	66	0
23	LEDA 1021529	G	02 41 20.220	-07 17 06.00						~	6	0
24	LEDA 1020521	G	02 41 29.380	-07 20 45.89						~	6	0
25	6dFGS gJ024135.1-081025	G	02 41 35.145	-08 10 24.33		15.96		14.96		~	11	0
26	LEDA 3097693	LSB	02 41 46.80	-08 24 09.3			16.2		15.8	~	117	0
27	6dFGS gJ024149.8-075535	G	02 41 49.950	-07 55 30.05		15.35		14.66		~	17	1
28	WHI B0240-07	LSB	02 42 38.0	-07 20 17			16.2		16.0	~	5	0
29	LEDA 1017261	G	02 42 46.878	-07 32 31.55						~	9	0
30	MCG-01-08-001	G	02 43 42.8	-06 39 05		14.4		14.7	15.0	~	19	1
31	NGC 1084	GiG	02 45 59.926	-07 34 43.10	11.22	11.59	10.73	10.55	11.1	~	351	2
32	SHOC 137	H2G	02 48 15.9460059552	-08 17 16.258401096						~	13	0
33	LEDA 1012648	GiP	02 48 39.955	-07 48 48.31						~	7	0
34	NGC 1110	GiP	02 49 09.319	-07 50 23.81		16.11		13.40	14.1	~	56	0
35	LEDA 1003250	G	02 49 11.171	-08 28 28.74						~	2	0
36	[BFK2006] GEMS-N1052-10	G	02 49 13.426	-08 06 54.16						~	6	1
37	SDSS J025328.64-085905.5	HI	02 53 28.641	-08 59 05.52		16.7		16.5	16.8	~	8	0
38	6dFGS gJ025333.5-103209	G	02 53 33.5	-10 32 08		16.27		15.54		~	5	0
39	NGC 1140	EmG	02 54 33.5271666624	-10 01 43.142143908	12.41	12.84	12.49	13.6	13.5	~	278	1
40	LEDA 3994671	G	02 55 19.66	-10 49 16.0		15.6		15.4	15.7	~	8	0
41	IC 271	LSB	02 55 59.4	-12 00 29		14.73		13.88	14.5	~	15	0
42	NAME M96 Group	GrG	10 48	+13.3						~	304	0

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