Nature of a shell of young stars in the outskirts of the Small Magellanic Cloud

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dc.contributor.authorMartinez-Delgado, David
dc.contributor.authorKatherina Vivas, Anna
dc.contributor.authorGrebel, Eva K.
dc.contributor.authorGallart, Carme
dc.contributor.authorPieres, Adriano
dc.contributor.authorBell, Cameron P. M.
dc.contributor.authorZivick, Paul
dc.contributor.authorLemasle, Bertrand
dc.contributor.authorJohnson, Lent Clifton
dc.contributor.authorCarballo-Bello, Julio A.
dc.contributor.authorNoel, Noelia E. D.
dc.contributor.authorCioni, Maria-Rosa L.
dc.contributor.authorChoi, Yumi
dc.contributor.authorBesla, Gurtina
dc.contributor.authorSchmidt, Judy
dc.contributor.authorZaritsky, Dennis
dc.contributor.authorGruendl, Robert A.
dc.contributor.authorSeibert, Mark
dc.contributor.authorNidever, David
dc.contributor.authorMonteagudo, Laura
dc.contributor.authorMonelli, Mateo
dc.contributor.authorHubl, Bernhard
dc.contributor.authorvan der Marel, Roeland
dc.contributor.authorBallesteros, Fernando J.
dc.contributor.authorStringfellow, Guy
dc.contributor.authorWalker, Alistair
dc.contributor.authorBlum, Robert
dc.contributor.authorBell, Eric F.
dc.contributor.authorConn, Blair C.
dc.contributor.authorOlsen, Knut
dc.contributor.authorMartin, Nicolas
dc.contributor.authorChu, You-Hua
dc.contributor.authorInno, Laura
dc.contributor.authorBoer, Thomas J. L.
dc.contributor.authorKallivayalil, Nitya
dc.contributor.authorDe Leo, Michele
dc.contributor.authorBeletsky, Yuri
dc.contributor.authorNeyer, Fabian
dc.contributor.authorMunoz, Ricardo R.
dc.date.accessioned2025-01-23T21:10:14Z
dc.date.available2025-01-23T21:10:14Z
dc.date.issued2019
dc.description.abstractContext. Understanding the evolutionary history of the Magellanic Clouds requires an in-depth exploration and characterization of the stellar content in their outer regions, which ultimately are key to tracing the epochs and nature of past interactions.
dc.description.abstractAims. We present new deep images of a shell-like overdensity of stars in the outskirts of the Small Magellanic Cloud (SMC). The shell, also detected in photographic plates dating back to the fifties, is located at similar to 1.9 degrees from the center of the SMC in the north-east direction.
dc.description.abstractMethods. The structure and stellar content of this feature were studied with multiband, optical data from the Survey of the MAgellanic Stellar History (SMASH) carried out with the Dark Energy Camera on the Blanco Telescope at Cerro Tololo Inter-American Observatory. We also investigate the kinematic of the stars in the shell using the Gaia Data Release 2.
dc.description.abstractResults. The shell is composed of a young population with an age similar to 150 Myr, with no contribution from an old population. Thus, it is hard to explain its origin as the remnant of a tidally disrupted stellar system. The spatial distribution of the young main-sequence stars shows a rich sub-structure, with a spiral arm-like feature emanating from the main shell and a separated small arc of young stars close to the globular cluster NGC 362. We find that the absolute g-band magnitude of the shell is M-g,M-shell =-10.78 +/- 0.02, with a surface brightness of mu(g,shell) = 25.81 +/- 0.01 mag arcsec(-2).
dc.description.abstractConclusion. We have not found any evidence that this feature is of tidal origin or a bright part of a spiral arm-like structure. Instead, we suggest that the shell formed in a recent star formation event, likely triggered by an interaction with the Large Magellanic Cloud and or the Milky Way, similar to 150 Myr ago.
dc.fuente.origenWOS
dc.identifier.doi10.1051/0004-6361/201936021
dc.identifier.eissn1432-0746
dc.identifier.issn0004-6361
dc.identifier.urihttps://doi.org/10.1051/0004-6361/201936021
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100845
dc.identifier.wosidWOS:000515093800001
dc.language.isoen
dc.revistaAstronomy & astrophysics
dc.rightsacceso restringido
dc.subjectgalaxies: dwarf
dc.subjectMagellanic Clouds
dc.subjectgalaxies: structure
dc.subjectLocal Group
dc.subjectgalaxies: interactions
dc.titleNature of a shell of young stars in the outskirts of the Small Magellanic Cloud
dc.typeartículo
dc.volumen631
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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