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

T. Saifollahi K. Voggel A. Lanccon M. Cantiello M. A. Raj +495 lainnya
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We present an analysis of observations of a 0.6\,deg$^2$ 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 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 data in the IE band is 80 complete at about $I_ E 26.0$\,mag V -5.0$\,mag), and it resolves GCs as small as h = 2.5$\,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 $I_ E = 25.0$\,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 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.

Topik & Kata Kunci

Physics

Penulis (500)

T

T. Saifollahi

K

K. Voggel

A

A. Lanccon

M

M. Cantiello

M

M. A. Raj

J

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Universit'e Paris-Saclay

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1. ViaP.Giuria

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I. Torino

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1. UCBLyon

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4. R. E. Fermi

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Format Sitasi

APA MLA BibTeX
Saifollahi, T., Voggel, K., Lanccon, A., Cantiello, M., Raj, M.A., Cuillandre, J. et al. (2024). Euclid Early Release Observations -- Globular clusters in the Fornax galaxy cluster, from dwarf galaxies to the intracluster field. https://doi.org/10.1051/0004-6361/202450784

Akses Cepat

Lihat di Sumber doi.org/10.1051/0004-6361/202450784
Informasi Jurnal
Tahun Terbit
2024
Bahasa
en
Total Sitasi
7×
Sumber Database
Semantic Scholar
DOI
10.1051/0004-6361/202450784
Akses
Open Access ✓