Signatures of tidal disruption in the Milky Way globular cluster NGC 6981 (M72)

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dc.contributor.authorPiatti, Andres E.
dc.contributor.authorMestre, Martin F.
dc.contributor.authorCarballo-Bello, Julio A.
dc.contributor.authorCarpintero, Daniel D.
dc.contributor.authorNavarrete, Camila
dc.contributor.authorMora, Marcelo D.
dc.contributor.authorCenzano, Carolina
dc.date.accessioned2025-01-20T23:53:56Z
dc.date.available2025-01-20T23:53:56Z
dc.date.issued2021
dc.description.abstractWe study the outer regions of the Milky Way globular cluster NGC 6981 based on publicly available BV photometry and new Dark Energy Camera (DECam) observations, both of which reach nearly 4 mag below the cluster main sequence (MS) turnoff. While the BV data sets reveal the present of extra-tidal features around the cluster, the much larger field of view of the DECam observations allowed us to identify some other tidal features, which extend from the cluster toward the opposite direction to the Milky Way center. Such structural features of clusters arise from stellar density maps built using MS stars, following a cleaning of the cluster color-magnitude diagram to remove the contamination of field stars. We also performed N-body simulations in order to help us to understand the spatial distribution of the extra-tidal debris. The outcomes reveal the presence of long trailing and leading tails that are mostly parallel to the direction of the cluster velocity vector. We find that the cluster loses most of its mass by tidal disruption during its perigalactic passages, each of which lasted nearly 20 Myr. Hence, a decrease in the density of escaping stars near the cluster is expected from our N-body simulations, which, in turn, means that stronger extra-tidal features could be found by exploring much larger areas around NGC 6891.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/202040038
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/202040038
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95007
dc.identifier.wosidWOS:000623240100001
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectglobular clusters: individual: NGC 6981
dc.subjectglobular clusters: general
dc.subjecttechniques: photometric
dc.subjectmethods: numerical
dc.titleSignatures of tidal disruption in the Milky Way globular cluster NGC 6981 (M72)
dc.typeartículo
dc.volumen646
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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