A cold stellar stream in Pegasus

Detalhes bibliográficos
Autor(a) principal: Perottoni, Hélio D
Data de Publicação: 2019
Outros Autores: Martin, Charles, Newberg, Heidi Jo [UNESP], Rocha-Pinto, Helio J., Almeida-Fernandes, Felipe De, Gomes-Júnior, Altair R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1093/mnras/stz869
http://hdl.handle.net/11449/188076
Resumo: We report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the colour-magnitude diagram that is optimized for a stellar population that is 8 Gyr old with [Fe/H] = -0.46 dex, and located at heliocentric distance of 18 kpc. The candidate stream is faint (turn-off point at r0 ∼19.6), sparse and barely visible in SDSS photometry. It is also detected in the (shallower) Pan-STARRs data. The residual stellar density in the (u - g)0, (g - r)0 colour-colour diagram gives the same estimate for the age and [Fe/H] of this stellar population. The stream is located at a Galactic coordinates (l, b) = (79.4°, -24.6°) and extends over 9° (2.5 kpc), with a width of 112 pc. The narrow width suggests a globular cluster progenitor.
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spelling A cold stellar stream in PegasusGalaxy: haloGalaxy: stellar contentGalaxy: structureWe report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the colour-magnitude diagram that is optimized for a stellar population that is 8 Gyr old with [Fe/H] = -0.46 dex, and located at heliocentric distance of 18 kpc. The candidate stream is faint (turn-off point at r0 ∼19.6), sparse and barely visible in SDSS photometry. It is also detected in the (shallower) Pan-STARRs data. The residual stellar density in the (u - g)0, (g - r)0 colour-colour diagram gives the same estimate for the age and [Fe/H] of this stellar population. The stream is located at a Galactic coordinates (l, b) = (79.4°, -24.6°) and extends over 9° (2.5 kpc), with a width of 112 pc. The narrow width suggests a globular cluster progenitor.Universidade Federal Do Rio de Janeiro Observatório Do Valongo, Lad. do Pedro Antônio 43Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic InstituteUNESP - São Paulo State University Grupo de Dinâmica Orbital e Planetologia, CEP 12516-410UNESP - São Paulo State University Grupo de Dinâmica Orbital e Planetologia, CEP 12516-410Universidade Federal do Rio de Janeiro (UFRJ)Rensselaer Polytechnic InstituteUniversidade Estadual Paulista (Unesp)Perottoni, Hélio DMartin, CharlesNewberg, Heidi Jo [UNESP]Rocha-Pinto, Helio J.Almeida-Fernandes, Felipe DeGomes-Júnior, Altair R.2019-10-06T15:56:30Z2019-10-06T15:56:30Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article843-850http://dx.doi.org/10.1093/mnras/stz869Monthly Notices of the Royal Astronomical Society, v. 486, n. 1, p. 843-850, 2019.1365-29660035-8711http://hdl.handle.net/11449/18807610.1093/mnras/stz8692-s2.0-85072251081Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMonthly Notices of the Royal Astronomical Societyinfo:eu-repo/semantics/openAccess2021-10-23T12:24:10Zoai:repositorio.unesp.br:11449/188076Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T12:24:10Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv A cold stellar stream in Pegasus
title A cold stellar stream in Pegasus
spellingShingle A cold stellar stream in Pegasus
Perottoni, Hélio D
Galaxy: halo
Galaxy: stellar content
Galaxy: structure
title_short A cold stellar stream in Pegasus
title_full A cold stellar stream in Pegasus
title_fullStr A cold stellar stream in Pegasus
title_full_unstemmed A cold stellar stream in Pegasus
title_sort A cold stellar stream in Pegasus
author Perottoni, Hélio D
author_facet Perottoni, Hélio D
Martin, Charles
Newberg, Heidi Jo [UNESP]
Rocha-Pinto, Helio J.
Almeida-Fernandes, Felipe De
Gomes-Júnior, Altair R.
author_role author
author2 Martin, Charles
Newberg, Heidi Jo [UNESP]
Rocha-Pinto, Helio J.
Almeida-Fernandes, Felipe De
Gomes-Júnior, Altair R.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Federal do Rio de Janeiro (UFRJ)
Rensselaer Polytechnic Institute
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Perottoni, Hélio D
Martin, Charles
Newberg, Heidi Jo [UNESP]
Rocha-Pinto, Helio J.
Almeida-Fernandes, Felipe De
Gomes-Júnior, Altair R.
dc.subject.por.fl_str_mv Galaxy: halo
Galaxy: stellar content
Galaxy: structure
topic Galaxy: halo
Galaxy: stellar content
Galaxy: structure
description We report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the colour-magnitude diagram that is optimized for a stellar population that is 8 Gyr old with [Fe/H] = -0.46 dex, and located at heliocentric distance of 18 kpc. The candidate stream is faint (turn-off point at r0 ∼19.6), sparse and barely visible in SDSS photometry. It is also detected in the (shallower) Pan-STARRs data. The residual stellar density in the (u - g)0, (g - r)0 colour-colour diagram gives the same estimate for the age and [Fe/H] of this stellar population. The stream is located at a Galactic coordinates (l, b) = (79.4°, -24.6°) and extends over 9° (2.5 kpc), with a width of 112 pc. The narrow width suggests a globular cluster progenitor.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-06T15:56:30Z
2019-10-06T15:56:30Z
2019-01-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1093/mnras/stz869
Monthly Notices of the Royal Astronomical Society, v. 486, n. 1, p. 843-850, 2019.
1365-2966
0035-8711
http://hdl.handle.net/11449/188076
10.1093/mnras/stz869
2-s2.0-85072251081
url http://dx.doi.org/10.1093/mnras/stz869
http://hdl.handle.net/11449/188076
identifier_str_mv Monthly Notices of the Royal Astronomical Society, v. 486, n. 1, p. 843-850, 2019.
1365-2966
0035-8711
10.1093/mnras/stz869
2-s2.0-85072251081
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Monthly Notices of the Royal Astronomical Society
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 843-850
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1799964731546533888

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