The complex globular cluster system of the S0 galaxy NGC 4382 in the outskirts of the Virgo Cluster
dc.contributor.author | Escudero, Carlos G. | pt_BR |
dc.contributor.author | Cortesi, Arianna | pt_BR |
dc.contributor.author | Faifer, Favio Raúl | pt_BR |
dc.contributor.author | Sesto, Leandro A. | pt_BR |
dc.contributor.author | Castelli, Analía Smith | pt_BR |
dc.contributor.author | Johnston, Evelyn J. | pt_BR |
dc.contributor.author | Reynaldi, Victoria | pt_BR |
dc.contributor.author | Chies-Santos, Ana Leonor | pt_BR |
dc.contributor.author | Salinas, Ricardo | pt_BR |
dc.contributor.author | Menéndez-Delmestre, Karín | pt_BR |
dc.contributor.author | Gonçalves, Thiago Signorini | pt_BR |
dc.contributor.author | Grossi, Marco | pt_BR |
dc.contributor.author | Oliveira, Claudia Lucia Mendes de | pt_BR |
dc.date.accessioned | 2022-05-31T01:01:04Z | pt_BR |
dc.date.issued | 2022 | pt_BR |
dc.identifier.issn | 0035-8711 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/239504 | pt_BR |
dc.description.abstract | NGC 4382 is a merger-remnant galaxy that has been classified as morphological type E2, S0, and even Sa. In this work, we performed a photometric and spectroscopic analysis of the globular cluster (GC) system of this peculiar galaxy in order to provide additional information about its history. We used a combination of photometric data in different filters, and multiobject and long-slit spectroscopic data obtained using the Gemini/GMOS instrument. The photometric analysis of the GC system, using the Gaussian Mixture Model algorithm in the colour plane, reveals a complex colour distribution within Rgal < 5 arcmin (26.1 kpc), showing four different groups: the typical blue and red subpopulations, a group with intermediate colours, and the fourth group towards even redder colours. From the spectroscopic analysis of 47 GCs, confirmed members of NGC 4382 based on radial velocities, we verified 3 of the 4 photometric groups from the analysis of their stellar populations using the ULySS code. NGC 4382 presents the classic blue (10.4 ± 2.8 Gyr, [Fe/H] = −1.48 ± 0.18 dex), and red (12.1 ± 2.3 Gyr, [Fe/H] = −0.64 ± 0.26 dex) GCs formed earlier in the lifetime of the galaxy, and a third group of young GCs (2.2 ± 0.9 Gyr; [Fe/H] = −0.05 ± 0.28 dex). Finally, analysis of long-slit data of the galaxy reveals a luminosity-weighted mean age for the stellar population of ∼2.7 Gyr, and an increasing metallicity from [Fe/H] = −0.1 to +0.2 dex in Rgal < 10 arcsec (0.87 kpc). These values, and other morphological signatures in the galaxy, are in good agreement with the younger group of GCs, indicating a common origin as a result of a recent merger. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Monthly notices of the royal astronomical society. Oxford. Vol. 511, no. 1 (Mar. 2022), p. 393-412 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Galaxies : Clusters : Individual : NGC 4382 | en |
dc.subject | Aglomerados globulares | pt_BR |
dc.subject | Espectroscopia | pt_BR |
dc.subject | Galaxies : Elliptical and lenticular, cD | en |
dc.subject | Fotometria astronômica | pt_BR |
dc.subject | Galaxies : Star clusters : General | en |
dc.title | The complex globular cluster system of the S0 galaxy NGC 4382 in the outskirts of the Virgo Cluster | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001139959 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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