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Verfasst von:Pieres, Adriano [VerfasserIn]   i
 Martínez-Delgado, David [VerfasserIn]   i
Titel:A stellar overdensity associated with the Small Magellanic Cloud
Verf.angabe:A. Pieres, B.X. Santiago, A. Drlica-Wagner, K. Bechtol, R.P. van der Marel, G. Besla, N.F. Martin, V. Belokurov, C. Gallart, D. Martinez-Delgado, J. Marshall, N.E.D. Nöel, S.R. Majewski, M.-R.L. Cioni, T.S. Li, W. Hartley, E. Luque, B.C. Conn, A.R. Walker, E. Balbinot, G.S. Stringfellow, K.a.G. Olsen, D. Nidever, Da Costa, L.N.R. Ogando, M. Maia, A. Fausti Neto, T. M. C. Abbott, F. B. Abdalla, S. Allam, J. Annis, A. Benoit-Lévy, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, C.E. Cunha, C.B. D'Andrea, S. Desai, H.T. Diehl, P. Doel, B. Flaugher, P. Fosalba, J. García-Bellido, D. Gruen, R.A. Gruendl, J. Gschwend, G. Gutierrez, K. Honscheid, D. James, K. Kuehn, N. Kuropatkin, F. Menanteau, R. Miquel, A.A. Plazas, A.K. Romer, M. Sako, E. Sanchez, V. Scarpine, M. Schubnell, I. Sevilla-Noarbe, R.C. Smith, M. Soares-Santos, F. Sobreira, E. Suchyta, M.E.C. Swanson, G. Tarle, D.L. Tucker, and W. Wester
E-Jahr:2017
Jahr:28 February 2017
Umfang:12 S.
Fussnoten:Gesehen am 19.10.2017
Titel Quelle:Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society
Ort Quelle:Oxford : Oxford Univ. Press, 1827
Jahr Quelle:2017
Band/Heft Quelle:468(2017), 2, Seite 1349-1360
ISSN Quelle:1365-2966
Abstract:We report the discovery of a stellar overdensity 8° north of the centre of the Small Magellanic Cloud (SMC; Small Magellanic Cloud Northern Over-Density; SMCNOD), using data from the first 2 yr of the Dark Energy Survey (DES) and the first year of the MAGellanic SatelLITEs Survey (MagLiteS). The SMCNOD is indistinguishable in age, metallicity and distance from the nearby SMC stars, being primarily composed of intermediate-age stars (6 Gyr, Z=0.001), with a small fraction of young stars (1 Gyr, Z=0.01). The SMCNOD has an elongated shape with an ellipticity of 0.6 and a size of ∼ 6° × 2°. It has an absolute magnitude of MV ≅ −7.7, rh = 2.1 kpc, and μV(r < rh) = 31.2 mag arcsec−2. We estimate a stellar mass of ∼105 M⊙, following a Kroupa mass function. The SMCNOD was probably removed from the SMC disc by tidal stripping, since it is located near the head of the Magellanic Stream, and the literature indicates likely recent Large Magellanic Cloud-SMC encounters. This scenario is supported by the lack of significant H i gas. Other potential scenarios for the SMCNOD origin are a transient overdensity within the SMC tidal radius or a primordial SMC satellite in advanced stage of disruption.
DOI:doi:10.1093/mnras/stx507
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: http://dx.doi.org/10.1093/mnras/stx507
 DOI: https://doi.org/10.1093/mnras/stx507
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1564573656
Verknüpfungen:→ Zeitschrift

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