2025A&A...700A.104U

Query : 2025A&A...700A.104U

2025A&A...700A.104U - Astronomy and Astrophysics, volume 700A104 (2025/8-1)

Euclid: Early Release Observations of diffuse stellar structures and globular clusters as probes of the mass assembly of galaxies in the Dorado group.

URBANO M., DUC P.-A., SAIFOLLAHI T., SOLA E., LANCON A., VOGGEL K., ANNIBALI F., BAES M., BOUY H., CANTIELLO M., CAROLLO D., CUILLANDRE J.-C., DIMAURO P., ERWIN P., FERGUSON A.M.N., HABAS R., HILKER M., HUNT L.K., KLUGE M., LARSEN S.S., LIU Q., MARCHAL O., MARLEAU F.R., MASSARI D., MULLER O., PELETIER R.F., POULAIN M., REJKUBA M., SCHIRMER M., STONE C., ZOLLER R., ALTIERI B., ANDREON S., AURICCHIO N., BACCIGALUPI C., BALDI M., BALESTRA A., BARDELLI S., BASSET A., BATTAGLIA P., BRANCHINI E., BRESCIA M., CAMERA S., CAPOBIANCO V., CARBONE C., CARRETERO J., CASAS S., CASTELLANO M., CASTIGNANI G., CAVUOTI S., CIMATTI A., COLODRO-CONDE C., CONGEDO G., CONSELICE C.J., CONVERSI L., COPIN Y., COURBIN F., COURTOIS H.M., DEGAUDENZI H., DE LUCIA G., DUBATH F., DUPAC X., DUSINI S., FARINA M., FARRENS S., FAUSTINI F., FERRIOL S., FRAILIS M., FRANCESCHI E., FUMANA M., GALEOTTA S., GEORGE K., GILLIS B., GIOCOLI C., GOMEZ-ALVAREZ P., GRAZIAN A., GRUPP F., GUZZO L., HAUGAN S.V.H., HOAR J., HOEKSTRA H., HOLMES W., HORMUTH F., HORNSTRUP A., HUDELOT P., JAHNKE K., JHABVALA M., KEIHANEN E., KERMICHE S., KUBIK B., KUMMEL M., KUNZ M., KURKI-SUONIO H., LE MIGNANT D., LIGORI S., LILJE P.B., LINDHOLM V., LLORO I., MAIORANO E., MANSUTTI O., MARCIN S., MARGGRAF O., MARKOVIC K., MARTINELLI M., MARTINET N., MARULLI F., MASSEY R., MEDINACELI E., MEI S., MELCHIOR M., MENEGHETTI M., MERLIN E., MEYLAN G., MOSCARDINI L., NAKAJIMA R., NEISSNER C., 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., RAISON F., RENZI A., RHODES J., RICCIO G., ROMELLI E., RONCARELLI M., ROSSETTI E., SAGLIA R., SAPONE D., SARTORIS B., SCARAMELLA R., SCHNEIDER P., SECROUN A., SEIDEL G., SERRANO S., SIRIGNANO C., STANCO L., STEINWAGNER J., TALLADA-CRESPI P., TAYLOR A.N., TERENO I., TOLEDO-MOREO R., TORRADEFLOT F., TUTUSAUS I., VASSALLO T., VERDOES KLEIJN G., WANG Y., WELLER J., WILLIAMS O.R., ZUCCA E., BOLZONELLA M., BURIGANA C., MORA A. and SCOTTEZ V.

Abstract (from CDS):

Deep surveys have helped to unveil the history of past and present galaxy mergers, and, in particular, uncovering their tidal debris and co-located globular clusters (GCs). Euclid's unique combination of capabilities (spatial resolution, depth, and wide sky coverage) will make it a groundbreaking tool for galactic archaeology in the Local Universe, bringing low-surface-brightness (LSB) science into the era of large-scale astronomical surveys. Euclid's Early Release Observations (ERO) demonstrate this potential with a field of view that includes several galaxies in the Dorado group. In this paper, we aim to derive from this image a mass assembly scenario for its main galaxies: NGC 1549, NGC 1553, and NGC 1546. We detected their internal and external diffuse structures, and identified candidate GCs. By analysing the colours and distributions of the diffuse structures and candidate GCs, we can place constraints on the galaxies' mass assembly and merger histories. The results demonstrate that feature morphology, surface brightness, colours, and GC density profiles are consistent with galaxies that have undergone different merger scenarios. We classify NGC 1549 as a pure elliptical galaxy that has undergone a major merger. NGC 1553 appears to have recently transitioned from a late-type galaxy to early type, after a series of radial minor to intermediate mergers. NGC 1546 is a rare specimen of galaxy with an undisturbed disk and a prominent diffuse stellar halo, which we infer has been fed by minor mergers and then disturbed by the tidal effect from NGC 1553. Finally, we identify limitations specific to the observing conditions of this ERO, in particular, stray light in the visible and persistence in the near-infrared bands. Once these issues are addressed and the extended emission from LSB objects is preserved by the data-processing pipeline, the Euclid Wide Survey will allow for studies of the Local Universe to be extended to statistical ensembles over a large part of the extragalactic sky.

Abstract Copyright: © The Authors 2025

Journal keyword(s): galaxies: interactions - galaxies: groups: individual: Dorado - galaxies: star clusters: general - galaxies: structure

Simbad objects: 17

Full paper

View the references in ADS

Number of rows : 17

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	NGC 474	GiP	01 20 06.6870520512	+03 24 55.861973100	12.75	12.37	11.51	11.42	10.56	~	371	1
3	ACO S 373	ClG	03 38 29.4	-35 27 08						~	2029	0
4	NAME Eridanus ClG	GrG	03 38 32.00	-22 18 51.0						~	200	0
5	LEDA 75104	LSB	04 14 09.07	-55 42 26.7		16.4				~	9	0
6	NGC 1546	EmG	04 14 36.542	-56 03 38.92	12.15	12.31	10.92	10.84	11.2	~	133	1
7	SMDG J0415044-555618	LSB	04 15 04.5	-55 56 16						~	4	0
8	NGC 1549	GiP	04 15 45.223	-55 35 32.50	11.22	10.48	9.79	9.08		~	255	1
9	SCG2 0414-5559	CGG	04 16 00.0	-55 51 57						~	4	0
10	[CMI2001] 5012-01	GiG	04 16 00.4	-55 34 06						~	2	0
11	NGC 1553	GiP	04 16 10.4697802536	-55 46 48.072797400	10.76	10.10	9.40	8.74		~	395	2
12	IC 2058	EmG	04 17 54.3720552624	-55 55 57.738342360		13.90		12.94	13.2	~	100	2
13	2MASX J04180709-5555503	GiP	04 18 07.092	-55 55 50.36		16.18				~	14	1
14	NGC 1566	Sy1	04 20 00.3968473248	-54 56 16.624708764	10.29	10.19	9.73	9.21	10.1	~	1051	2
15	NAME NGC 1566 Group	GrG	04 20 00.6	-54 56 17						~	180	0
16	NGC 4651	LIN	12 43 42.6376070448	+16 23 36.002649300		11.30	10.92	10.42	9.84	~	537	0
17	NAME Centaurus A	BLL	13 25 27.61521044	-43 01 08.8050291		8.18	6.84	6.66		~	4774	3

To bookmark this query, right click on this link: simbad:objects in 2025A&A...700A.104U and select 'bookmark this link' or equivalent in the popup menu