J-PLUS: Detecting and studying extragalactic globular clusters

Brito-Silva, D.; Coelho, P.; Cortesi, A.; Bruzual, G.; Chies-Santos, Ana L.; Ederoclite, A.; Hernández-Jiménez, J. A.; Roman, I. San; Varela, J.; Forbes, Duncan A.; Cenarro, J.; Cristóbal-Hornillos, D.; Hernández-Monteagudo, C.; López-Sanjuán, C.; Marín-Franch, A.; Moles, M.; Vázquez-Ramió, H.; Alcaniz, J. S.; Dupke, Renato A.; Sodré, L.; Angulo, Raúl E.

doi:10.1051/0004-6361/202142402

Cited by 4 publications

(1 citation statement)

References 125 publications

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“…Within the innermost part of the NGC 1023 group, there are four late-type dwarf companion galaxies (Trentham & Tully 2009), called NGC 1023A, NGC 1023B, NGC 1023C, and NGC 1023D. Only NGC 1023A was considered to be an ongoing interaction with the main galaxy NGC 1023 and it has been stripped of its gas (Capaccioli et al 1986;Dolfi et al 2021;de Brito Silva et al 2022), resulting in an extended and irregular H I distribution detected in NGC 1023.…”

Section: Introductionmentioning

confidence: 99%

Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies

Xu,

Zhu,

Hess

et al. 2023

ApJL

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Based on the atomic-hydrogen (H i) observations using the Five-hundred-meter Aperture Spherical radio Telescope, we present a detailed study of the gas-rich massive S0 galaxy NGC 1023 in a nearby galaxy group. The presence of a H i extended warped disk in NGC 1023 indicates that this S0 galaxy originated from a spiral galaxy. The data also suggest that NGC 1023 is interacting with four dwarf galaxies. In particular, one of the largest dwarf galaxies has fallen into the gas disk of NGC 1023, forming a rare bright–dark galaxy pair with a large gas clump. This clump shows the signature of a galaxy but has no optical counterpart, implying that it is a newly formed starless galaxy. Our results first suggest that a massive S0 galaxy in a galaxy group can form via the morphological transformation from a spiral under the joint action of multiple tidal interactions.

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Section: Introductionmentioning

confidence: 99%

Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies

Xu,

Zhu,

Hess

et al. 2023

ApJL

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Galaxy archaeology for wet mergers: Globular cluster age distributions in the Milky Way and nearby galaxies

Valenzuela,

Remus,

McKenzie

et al. 2024

A&A

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Identifying past wet merger activity in galaxies has been a longstanding issue in extragalactic formation history studies. Gaia's 6D kinematic measurements in our Milky Way (MW) have vastly extended the possibilities for Galactic archaeology, leading to the discovery of a multitude of early mergers in the MW's past. As recent work has established a link between younger globular clusters (GCs; less than about 10-- year old) and wet galaxy merger events, the MW provides an ideal laboratory for testing which GC properties can be used to trace extragalactic galaxy formation histories. To test the hypothesis that GCs trace wet mergers, we relate the measured GC age distributions of the MW and three nearby galaxies and to their merger histories and interpret the connection with wet mergers through an empirical model for GC formation. The GC ages of observed galaxies are taken from a variety of studies to analyze their age distributions side-by-side with the model. For the MW, we additionally cross-match the GCs with their associated progenitor host galaxies to disentangle the connection to the GC age distribution. For the modeled GCs, we take galaxies with similar GC age distributions as observed to compare their accretion histories with those inferred through observations. We find that the MW GC age distribution is bimodal, mainly caused by younger GCs (10-- year old associated with Gaia-Sausage/Enceladus (GSE) and in part by unassociated high-energy GCs. The GSE GC age distribution also appears to be bimodal. We propose that the older GSE GCs (12-- year old) were accreted together with GSE, while the younger ones formed as a result of the merger. For the nearby galaxies, we find that clear peaks in the GC age distributions coincide with active early gas-rich merger phases. Even small signatures in the GC age distributions agree well with the expected wet formation histories of the galaxies inferred through other observed tracers. From the models, we predict that the involved cold gas mass can be estimated from the number of GCs found in the formation burst. Multimodal GC age distributions can trace massive wet mergers as a result of GCs being formed through them. From the laboratory of our own MW and nearby galaxies we conclude that the ages of younger GC populations of galaxies can be used to infer the wet merger history of a galaxy.

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Beyond the rings: Polar ring galaxy NGC 4262 and its globular cluster system

Akhil,

Kartha,

Mathew

2024

Monthly Notices of the Royal Astronomical Society

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In the context of the hierarchical model of galaxy evolution, polar ring galaxies (PRGs) are considered the intermediate phase between ongoing mergers and quiescent galaxies. This study explores the globular cluster system (GCS) and its properties in the nearest PRG, NGC4262, serving as a pilot investigation to study GCS in nearby PRGs. We utilize wide and deep field observations of the CFHT as part of the NGVS to investigate the GCS of NGC4262. We presented the first optical image of NGC4262 with an optically faint ring component. The photometric analysis of the GCS displays a distinct color bimodality. We estimate the total number of GCs for NGC4262 to be 266±16 GCs with a specific frequency of 4.2±0.8 and a specific mass of 0.23±0.01, which is relatively high compared to other galaxies of similar mass and environmental conditions. The spatial and azimuthal distributions of subpopulations reveal strong evidence of previous interactions within the host galaxy. The color distribution of GCS in NGC4262 shows a gradient of -0.05±0.01 within 5.5’, supporting the notion of past interactions and evolutionary transitions. PRG NGC4262 conforms to the overall trend of the GCS mass with respect to the halo mass. Furthermore, our investigation of the global scaling relations between GCS and host galaxy parameters provides further support for the hypothesis that PRGs are an intermediate phase connecting ongoing mergers and quiescent galaxies.

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J-PLUS: Detecting and studying extragalactic globular clusters

Cited by 4 publications

References 125 publications

Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies

Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies

Galaxy archaeology for wet mergers: Globular cluster age distributions in the Milky Way and nearby galaxies

Beyond the rings: Polar ring galaxy NGC 4262 and its globular cluster system

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