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

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Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field. / Euclid Collaboration.
In: Astronomy and Astrophysics, Vol. 697, A10, 31.05.2025.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Euclid Collaboration 2025, 'Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field', Astronomy and Astrophysics, vol. 697, A10. https://doi.org/10.1051/0004-6361/202450784

APA

Euclid Collaboration (2025). Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field. Astronomy and Astrophysics, 697, Article A10. https://doi.org/10.1051/0004-6361/202450784

Vancouver

Euclid Collaboration. Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field. Astronomy and Astrophysics. 2025 May 31;697:A10. Epub 2025 Apr 30. doi: 10.1051/0004-6361/202450784

Author

Euclid Collaboration. / Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field. In: Astronomy and Astrophysics. 2025 ; Vol. 697.

Bibtex

@article{a9f93ec88197436881b53e7ba27ce406,
title = "Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field",
abstract = "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{\textquoteright}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.",
author = "{Euclid Collaboration} and T. Saifollahi and K. Voggel and A. Lan{\c c}on and M. Cantiello and M.A. Raj and J.-C. Cuillandre and S.S. Larsen and F.R. Marleau and A. Venhola and M. Schirmer and D. Carollo and P.-A. Duc and A.M.N. Ferguson and L.K. Hunt and M. K{\"u}mmel and R. Laureijs and O. Marchal and A.A. Nucita and R.F. Peletier and M. Poulain and M. Rejkuba and R. S{\'a}nchez-Janssen and M. Urbano and B. Altieri and M. Baes and M. Bolzonella and C.J. Conselice and P. Cote and P. Dimauro and A.H. Gonzalez and R. Habas and P. Hudelot and M. Kluge and P. Lonare and D. Massari and E. Romelli and R. Scaramella and E. Sola and C. Stone and C. Tortora and {van Mierlo}, S.E. and J.H. Knapen and J. Mart{\'i}n-Fleitas and A. Mora and I. Hook and A.N. Taylor and Y. Wang and J. Weller and O.R. Williams and D. Scott",
year = "2025",
month = may,
day = "31",
doi = "10.1051/0004-6361/202450784",
language = "English",
volume = "697",
journal = "Astronomy and Astrophysics",
issn = "1432-0746",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - Euclid: Early Release Observations – Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field

AU - Euclid Collaboration

AU - Saifollahi, T.

AU - Voggel, K.

AU - Lançon, A.

AU - Cantiello, M.

AU - Raj, M.A.

AU - Cuillandre, J.-C.

AU - Larsen, S.S.

AU - Marleau, F.R.

AU - Venhola, A.

AU - Schirmer, M.

AU - Carollo, D.

AU - Duc, P.-A.

AU - Ferguson, A.M.N.

AU - Hunt, L.K.

AU - Kümmel, M.

AU - Laureijs, R.

AU - Marchal, O.

AU - Nucita, A.A.

AU - Peletier, R.F.

AU - Poulain, M.

AU - Rejkuba, M.

AU - Sánchez-Janssen, R.

AU - Urbano, M.

AU - Altieri, B.

AU - Baes, M.

AU - Bolzonella, M.

AU - Conselice, C.J.

AU - Cote, P.

AU - Dimauro, P.

AU - Gonzalez, A.H.

AU - Habas, R.

AU - Hudelot, P.

AU - Kluge, M.

AU - Lonare, P.

AU - Massari, D.

AU - Romelli, E.

AU - Scaramella, R.

AU - Sola, E.

AU - Stone, C.

AU - Tortora, C.

AU - van Mierlo, S.E.

AU - Knapen, J.H.

AU - Martín-Fleitas, J.

AU - Mora, A.

AU - Hook, I.

AU - Taylor, A.N.

AU - Wang, Y.

AU - Weller, J.

AU - Williams, O.R.

AU - Scott, D.

PY - 2025/5/31

Y1 - 2025/5/31

N2 - 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.

AB - 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.

U2 - 10.1051/0004-6361/202450784

DO - 10.1051/0004-6361/202450784

M3 - Journal article

VL - 697

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 1432-0746

M1 - A10

ER -