A stellar overdensity associated with the Small Magellanic Cloud
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/169027 |
Resumo: | 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 theMAGellanic 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 HI 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. |
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Pieres, AdrianoSantiago, Basilio XavierDrlica-Wagner, AlexBechtol, KeithMarel, Roeland Paul van derBesla, GurtinaMartin, Nicolas F.Belokurov, VasilyGallart, CarmeMartínez-Delgado, DavidMarshall, Jennifer L.Nöel, N. E. D.Majewski, Steven RaymondCioni, Maria-Rosa L.Li, T. S.Hartley, WilliamLuque Canaza, Elmer FidelConn, Blair CampbellWalker, AlistairBalbinot, EduardoStringfellow, Guy S.Olsen, Knut A. G.Nidever, D.L.Costa, Luiz N. daOgando, Ricardo L.C.Maia, Marcio Antonio GeimbaFausti Neto, AngeloAbbott, Timothy M. C.Abdalla, Filipe B.Allam, Sahar S.Annis, James T.Benoit-Lévy, AurélienCarnero Rosell, AurelioCarrasco Kind, MatíasCarretero Palacios, JorgeCunha, Carlos EduardoD'Andrea, Christopher B.Desai, S.Diehl, H. ThomasDoel, PeterFlaugher, BrennaFosalba Vela, PabloGarcía-Bellido, JuanGruen, DanielGruendl, Robert A.Gschwend, Julia de FigueiredoGutierrez, Gaston R.Honscheid, K.James, David J.Kuehn, KylerKuropatkin, Nikolay P.Menanteau, FelipeMiquel, RamonPlazas Malagón, Andrés AlejandroRomer, Anita K.Sako, MariSanchez-Alvaro, EusebioScarpine, Victor EmanuelSchubnell, MichaelSevilla Noarbe, IgnacioSmith, Robert ChristopherSoares-Santos, MarcelleSobreira, FláviaSuchyta, EricSwanson, Molly E. C.Tarle, GregoryTucker, Douglas L.Wester, William Carl2017-09-28T02:28:37Z20170035-8711http://hdl.handle.net/10183/169027001044356We 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 theMAGellanic 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 HI 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.application/pdfengMonthly notices of the Royal Astronomical Society. Oxford. Vol. 468, no. 2 (June 2017), p. 1349-1360Pequena Nuvem de MagalhãesMapeamentos astronômicosFormacao de estrelasGalaxies: interactionsMagellanic CloudsA stellar overdensity associated with the Small Magellanic CloudEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001044356.pdf001044356.pdfTexto completo (inglês)application/pdf6768601http://www.lume.ufrgs.br/bitstream/10183/169027/1/001044356.pdfa18ebb7e066ecc8ac59bdea219cb0d27MD51TEXT001044356.pdf.txt001044356.pdf.txtExtracted Texttext/plain59239http://www.lume.ufrgs.br/bitstream/10183/169027/2/001044356.pdf.txt0984e85a49af19dcae3cdbbfacd1223bMD52THUMBNAIL001044356.pdf.jpg001044356.pdf.jpgGenerated Thumbnailimage/jpeg2169http://www.lume.ufrgs.br/bitstream/10183/169027/3/001044356.pdf.jpg6746ad856f588142eb598f06c9f73c47MD5310183/1690272023-07-02 03:42:19.459304oai:www.lume.ufrgs.br:10183/169027Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-02T06:42:19Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A stellar overdensity associated with the Small Magellanic Cloud |
title |
A stellar overdensity associated with the Small Magellanic Cloud |
spellingShingle |
A stellar overdensity associated with the Small Magellanic Cloud Pieres, Adriano Pequena Nuvem de Magalhães Mapeamentos astronômicos Formacao de estrelas Galaxies: interactions Magellanic Clouds |
title_short |
A stellar overdensity associated with the Small Magellanic Cloud |
title_full |
A stellar overdensity associated with the Small Magellanic Cloud |
title_fullStr |
A stellar overdensity associated with the Small Magellanic Cloud |
title_full_unstemmed |
A stellar overdensity associated with the Small Magellanic Cloud |
title_sort |
A stellar overdensity associated with the Small Magellanic Cloud |
author |
Pieres, Adriano |
author_facet |
Pieres, Adriano Santiago, Basilio Xavier Drlica-Wagner, Alex Bechtol, Keith Marel, Roeland Paul van der Besla, Gurtina Martin, Nicolas F. Belokurov, Vasily Gallart, Carme Martínez-Delgado, David Marshall, Jennifer L. Nöel, N. E. D. Majewski, Steven Raymond Cioni, Maria-Rosa L. Li, T. S. Hartley, William Luque Canaza, Elmer Fidel Conn, Blair Campbell Walker, Alistair Balbinot, Eduardo Stringfellow, Guy S. Olsen, Knut A. G. Nidever, D.L. Costa, Luiz N. da Ogando, Ricardo L.C. Maia, Marcio Antonio Geimba Fausti Neto, Angelo Abbott, Timothy M. C. Abdalla, Filipe B. Allam, Sahar S. Annis, James T. Benoit-Lévy, Aurélien Carnero Rosell, Aurelio Carrasco Kind, Matías Carretero Palacios, Jorge Cunha, Carlos Eduardo D'Andrea, Christopher B. Desai, S. Diehl, H. Thomas Doel, Peter Flaugher, Brenna Fosalba Vela, Pablo García-Bellido, Juan Gruen, Daniel Gruendl, Robert A. Gschwend, Julia de Figueiredo Gutierrez, Gaston R. Honscheid, K. James, David J. Kuehn, Kyler Kuropatkin, Nikolay P. Menanteau, Felipe Miquel, Ramon Plazas Malagón, Andrés Alejandro Romer, Anita K. Sako, Mari Sanchez-Alvaro, Eusebio Scarpine, Victor Emanuel Schubnell, Michael Sevilla Noarbe, Ignacio Smith, Robert Christopher Soares-Santos, Marcelle Sobreira, Flávia Suchyta, Eric Swanson, Molly E. C. Tarle, Gregory Tucker, Douglas L. Wester, William Carl |
author_role |
author |
author2 |
Santiago, Basilio Xavier Drlica-Wagner, Alex Bechtol, Keith Marel, Roeland Paul van der Besla, Gurtina Martin, Nicolas F. Belokurov, Vasily Gallart, Carme Martínez-Delgado, David Marshall, Jennifer L. Nöel, N. E. D. Majewski, Steven Raymond Cioni, Maria-Rosa L. Li, T. S. Hartley, William Luque Canaza, Elmer Fidel Conn, Blair Campbell Walker, Alistair Balbinot, Eduardo Stringfellow, Guy S. Olsen, Knut A. G. Nidever, D.L. Costa, Luiz N. da Ogando, Ricardo L.C. Maia, Marcio Antonio Geimba Fausti Neto, Angelo Abbott, Timothy M. C. Abdalla, Filipe B. Allam, Sahar S. Annis, James T. Benoit-Lévy, Aurélien Carnero Rosell, Aurelio Carrasco Kind, Matías Carretero Palacios, Jorge Cunha, Carlos Eduardo D'Andrea, Christopher B. Desai, S. Diehl, H. Thomas Doel, Peter Flaugher, Brenna Fosalba Vela, Pablo García-Bellido, Juan Gruen, Daniel Gruendl, Robert A. Gschwend, Julia de Figueiredo Gutierrez, Gaston R. Honscheid, K. James, David J. Kuehn, Kyler Kuropatkin, Nikolay P. Menanteau, Felipe Miquel, Ramon Plazas Malagón, Andrés Alejandro Romer, Anita K. Sako, Mari Sanchez-Alvaro, Eusebio Scarpine, Victor Emanuel Schubnell, Michael Sevilla Noarbe, Ignacio Smith, Robert Christopher Soares-Santos, Marcelle Sobreira, Flávia Suchyta, Eric Swanson, Molly E. C. Tarle, Gregory Tucker, Douglas L. Wester, William Carl |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Pieres, Adriano Santiago, Basilio Xavier Drlica-Wagner, Alex Bechtol, Keith Marel, Roeland Paul van der Besla, Gurtina Martin, Nicolas F. Belokurov, Vasily Gallart, Carme Martínez-Delgado, David Marshall, Jennifer L. Nöel, N. E. D. Majewski, Steven Raymond Cioni, Maria-Rosa L. Li, T. S. Hartley, William Luque Canaza, Elmer Fidel Conn, Blair Campbell Walker, Alistair Balbinot, Eduardo Stringfellow, Guy S. Olsen, Knut A. G. Nidever, D.L. Costa, Luiz N. da Ogando, Ricardo L.C. Maia, Marcio Antonio Geimba Fausti Neto, Angelo Abbott, Timothy M. C. Abdalla, Filipe B. Allam, Sahar S. Annis, James T. Benoit-Lévy, Aurélien Carnero Rosell, Aurelio Carrasco Kind, Matías Carretero Palacios, Jorge Cunha, Carlos Eduardo D'Andrea, Christopher B. Desai, S. Diehl, H. Thomas Doel, Peter Flaugher, Brenna Fosalba Vela, Pablo García-Bellido, Juan Gruen, Daniel Gruendl, Robert A. Gschwend, Julia de Figueiredo Gutierrez, Gaston R. Honscheid, K. James, David J. Kuehn, Kyler Kuropatkin, Nikolay P. Menanteau, Felipe Miquel, Ramon Plazas Malagón, Andrés Alejandro Romer, Anita K. Sako, Mari Sanchez-Alvaro, Eusebio Scarpine, Victor Emanuel Schubnell, Michael Sevilla Noarbe, Ignacio Smith, Robert Christopher Soares-Santos, Marcelle Sobreira, Flávia Suchyta, Eric Swanson, Molly E. C. Tarle, Gregory Tucker, Douglas L. Wester, William Carl |
dc.subject.por.fl_str_mv |
Pequena Nuvem de Magalhães Mapeamentos astronômicos Formacao de estrelas |
topic |
Pequena Nuvem de Magalhães Mapeamentos astronômicos Formacao de estrelas Galaxies: interactions Magellanic Clouds |
dc.subject.eng.fl_str_mv |
Galaxies: interactions Magellanic Clouds |
description |
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 theMAGellanic 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 HI 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. |
publishDate |
2017 |
dc.date.accessioned.fl_str_mv |
2017-09-28T02:28:37Z |
dc.date.issued.fl_str_mv |
2017 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/169027 |
dc.identifier.issn.pt_BR.fl_str_mv |
0035-8711 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001044356 |
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0035-8711 001044356 |
url |
http://hdl.handle.net/10183/169027 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the Royal Astronomical Society. Oxford. Vol. 468, no. 2 (June 2017), p. 1349-1360 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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