2025A&A...697A..10S

Query : 2025A&A...697A..10S

2025A&A...697A..10S - Astronomy and Astrophysics, volume 697A10 (2025/5-1)

Euclid: Early Release Observations - Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field.

SAIFOLLAHI T., VOGGEL K., LANCON A., CANTIELLO M., RAJ M.A., CUILLANDRE J.-C., LARSEN S.S., MARLEAU F.R., VENHOLA A., SCHIRMER M., CAROLLO D., DUC P.-A., FERGUSON A.M.N., HUNT L.K., KUMMEL M., LAUREIJS R., MARCHAL O., NUCITA A.A., PELETIER R.F., POULAIN M., REJKUBA M., SANCHEZ-JANSSEN R., URBANO M., ABDURRO'UF, ALTIERI B., BAES M., BOLZONELLA M., CONSELICE C.J., COTE P., DIMAURO P., GONZALEZ A.H., HABAS R., HUDELOT P., KLUGE M., LONARE P., MASSARI D., ROMELLI E., SCARAMELLA R., SOLA E., STONE C., TORTORA C., VAN MIERLO S.E., KNAPEN J.H., MARTIN-FLEITAS J., MORA A., ROMAN J., AGHANIM N., AMARA A., ANDREON S., AURICCHIO N., BALDI M., BALESTRA A., BARDELLI S., BASSET A., BENDER R., BONINO D., BRANCHINI E., BRESCIA M., BRINCHMANN J., CAMERA S., CAPOBIANCO V., CARBONE C., CARRETERO J., CASAS S., CASTELLANO M., CAVUOTI S., CIMATTI A., CONGEDO G., CONVERSI L., COPIN Y., COURBIN F., COURTOIS H.M., CROPPER M., DA SILVA A., DEGAUDENZI H., DI GIORGIO A.M., DINIS J., DUBATH F., DUPAC X., DUSINI S., FABRICIUS M., FARINA M., FARRENS S., FERRIOL S., FOSALBA P., FRAILIS M., FRANCESCHI E., FUMANA M., GALEOTTA S., GARILLI B., GILLARD W., GILLIS B., GIOCOLI C., GOMEZ-ALVAREZ P., GRANETT B.R., GRAZIAN A., GRUPP F., GUZZO L., HAUGAN S.V.H., HOAR J., HOEKSTRA H., HOLMES W., HOOK I., HORMUTH F., HORNSTRUP A., JAHNKE K., JHABVALA M., KEIHANEN E., KERMICHE S., KIESSLING A., KITCHING T., KOHLEY R., KUBIK B., KUIJKEN K., KUNZ M., KURKI-SUONIO H., LAHAV O., LE MIGNANT D., LIGORI S., LILJE P.B., LINDHOLM V., LLORO I., MAINO D., MAIORANO E., MANSUTTI O., MARGGRAF O., MARKOVIC K., MARTINET N., MARULLI F., MASSEY R., MAUROGORDATO S., McCRACKEN H.J., MEDINACELI E., MEI S., MELCHIOR M., MELLIER Y., MENEGHETTI M., MEYLAN G., MORESCO M., MOSCARDINI L., MUNARI E., NAKAJIMA R., NICHOL R.C., NIEMI S.-M., PADILLA C., PALTANI S., PASIAN F., PEDERSEN K., PERCIVAL W.J., PETTORINO V., PIRES S., POLENTA G., PONCET M., POPA L.A., POZZETTI L., RACCA G.D., RAISON F., REBOLO R., REFREGIER A., RENZI A., RHODES J., RICCIO G., RONCARELLI M., ROSSETTI E., SAGLIA R., SAPONE D., SARTORIS B., SCHNEIDER P., SCHRABBACK T., SECROUN A., SEIDEL G., SERRANO S., SIRIGNANO C., SIRRI G., STANCO L., TALLADA-CRESPI P., TAYLOR A.N., TEPLITZ H.I., TERENO I., TOLEDO-MOREO R., TORRADEFLOT F., TSYGANOV A., TUTUSAUS I., VALENTIJN E.A., VALENZIANO L., VASSALLO T., VERDOES KLEIJN G., VEROPALUMBO A., WANG Y., WELLER J., WILLIAMS O.R., ZAMORANI G., ZUCCA E., BIVIANO A., BURIGANA C., SCOTTEZ V., SIMON P., BALOGH M. and SCOTT D.

Abstract (from CDS):

We present an analysis of Euclid observations of a 0.6 deg2 field in the central region of the Fornax galaxy cluster that were acquired during the performance verification phase. With these data, we investigated the potential of Euclid to identify globular clusters (GCs) at 20 Mpc and validated the search methods using artificial GCs and known GCs within the field from the literature. Our analysis of artificial GCs injected into the data shows that Euclid's data in the IE band is 80% complete at about IE ∼ 26.0 mag (MV ∼ -5.0 mag), and it resolves GCs as small as rh = 2.5 pc. In the IE band, we detected more than 95% of the known GCs from previous spectroscopic surveys and GC candidates of the ACS Fornax Cluster Survey, of which more than 80% are resolved. We identify more than 5000 new GC candidates within the field of view down to IE = 25.0 mag, about 1.5 mag fainter than the typical GC luminosity function turn-over magnitude, and we investigated their spatial distribution within the intracluster field. We then focused on the GC candidates around dwarf galaxies and investigated their numbers, stacked luminosity distribution, and stacked radial distribution. While the overall GC properties are consistent with those in the literature, we found an interesting over-representation of relatively bright candidates within a small number of relatively GC-rich dwarf galaxies. Our work confirms the capabilities of Euclid data in detecting GCs and separating them from foreground and background contaminants at a distance of 20 Mpc, particularly for low GC-count systems such as dwarf galaxies.

Abstract Copyright: © The Authors 2025

Journal keyword(s): methods: observational - galaxies: clusters: intracluster medium - galaxies: dwarf - galaxies: clusters: individual: Fornax - galaxies: star clusters: general

Simbad objects: 56

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Number of rows : 56
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 SMDG J0239150-080657 LSB 02 39 15.11 -08 06 58.6     16.5   16.2 ~ 116 0
2 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
3 NAME NGC 1052 Group GrG 02 41 09.3 -08 07 10           ~ 90 0
4 LEDA 3097693 LSB 02 41 46.80 -08 24 09.3     16.2   15.8 ~ 183 0
5 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
6 LEDA 74737 LSB 03 34 20.2 -35 21 45   17.5       ~ 23 0
7 MCG-06-08-027 EmG 03 34 29.4927803424 -35 32 47.329271916   14.50       ~ 95 1
8 NGFS J033443-353115 LSB 03 34 43.390 -35 31 15.08           ~ 8 0
9 FDS 16 0141 LSB 03 34 52.0 -35 37 24           ~ 8 0
10 FDS 16 0170 LSB 03 34 52.7 -35 34 10           ~ 11 0
11 LEDA 74742 LSB 03 34 56.5 -35 11 27   19.0 18.25     ~ 22 0
12 FDS 16 0329 LSB 03 34 57.6 -35 13 25           ~ 11 0
13 LEDA 74744 LSB 03 34 58.2 -35 02 34   18.5       ~ 21 0
14 NGC 1373 GiP 03 34 59.1993515280 -35 10 15.879086760 14.44 14.03 13.26     ~ 136 1
15 LEDA 74745 LSB 03 35 00.2 -35 19 21   19.2 19.26     ~ 24 0
16 FDS 16 0227 LSB 03 35 05.4 -35 27 02           ~ 12 0
17 LEDA 74747 LSB 03 35 05.5 -35 13 06   19.6 19.07     ~ 22 0
18 LEDA 74749 LSB 03 35 11.5 -35 19 22   19.5       ~ 24 0
19 FDS 16 0230b G 03 35 12.0 -35 26 03           ~ 7 0
20 NGC 1374 EmG 03 35 16.5885737352 -35 13 34.563417168 12.46 11.97 11.08 10.59   ~ 322 1
21 NGC 1375 GiG 03 35 16.8025873104 -35 15 56.371399740 13.50 13.02 12.40 11.74   ~ 175 1
22 LEDA 74754 LSB 03 35 30.366 -35 15 08.26   19.2 18.99     ~ 15 0
23 LEDA 13287 LSB 03 35 42.79 -35 20 17.2   17.2 16.85     ~ 31 1
24 LEDA 74757 LSB 03 35 42.8 -35 30 51   18.3 18.85     ~ 19 0
25 NGFS J033547-352142 LSB 03 35 47.340 -35 21 42.40           ~ 7 0
26 FDS 16 0272 LSB 03 35 57.9 -35 20 53           ~ 10 0
27 NGFS J033602-351839 LSB 03 36 01.763 -35 18 38.58           ~ 6 0
28 LEDA 74761 LSB 03 36 03.94 -35 23 20.5   17.7 17.34     ~ 27 1
29 NGC 1379 GiP 03 36 03.9668625792 -35 26 28.547476800 12.17 12.04 10.91 10.60   ~ 277 1
30 NGC 1380 Sy2 03 36 27.590 -34 58 34.68 11.32 10.94 9.93 9.37   ~ 460 1
31 LEDA 74770 LSB 03 36 28.0 -35 12 39   18.7 18.78     ~ 22 0
32 NGC 1381 GiP 03 36 31.6592184144 -35 17 42.739221912 12.90 12.47 11.50 11.02   ~ 269 1
33 FCC 171 LSB 03 36 37.252 -35 23 09.33           ~ 28 2
34 LEDA 74775 LSB 03 36 43.0 -35 26 08   18.8       ~ 18 0
35 LEDA 74781 GiC 03 36 53.21 -34 56 17.3   16.93       ~ 30 0
36 MCG-06-09-008 GiP 03 36 54.3158470008 -35 22 28.948080864   14.81       ~ 105 2
37 NGC 1387 Sy2 03 36 57.0337458600 -35 30 23.675934060 12.18 11.75 10.69 10.16   ~ 290 1
38 FDS 11 0306 LSB 03 36 59.8 -35 20 36           ~ 14 1
39 NGFS J033700-350816 LSB 03 36 59.856 -35 08 15.72           ~ 11 0
40 LEDA 74783 LSB 03 37 02.7 -34 52 32   19.5       ~ 20 0
41 6dFGS gJ033704.6-353524 GiC 03 37 04.66 -35 35 24.0   15.94   15.65   ~ 51 0
42 NGC 1382 GiP 03 37 08.9722655064 -35 11 41.995386996 13.19 13.79 12.92 12.31   ~ 135 1
43 LEDA 74791 GiC 03 37 23.41 -34 54 00.1   16.51       ~ 32 0
44 FDS 11 0299 LSB 03 37 38.6 -35 23 07           ~ 11 0
45 LEDA 74796 LSB 03 37 41.1 -35 17 46   19.1       ~ 23 0
46 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
47 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
48 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
49 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
50 SMDG J1257017+282325 LSB 12 57 01.687 +28 23 24.73     19.14 18.50   ~ 31 0
51 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
52 SMDG J1300580+265835 LSB 13 00 57.996 +26 58 34.72     19.37 18.43   ~ 145 0
53 GMP 2175 LSB 13 01 15.845 +27 12 38.62     19.41 18.58   ~ 47 0
54 SMDG J1301582+275012 LSB 13 01 58.205 +27 50 11.91     19.89 19.45   ~ 61 0
55 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 165 0
56 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2

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