Spiral structure of the third galactic quadrant and the solution to the Canis Major debate
- Autores
- Moitinho, A.; Vazquez, Ruben Angel; Carraro, Giovanni; Baume, Gustavo Luis; Giorgi, Edgard Ervar Salvador; Lyra, W.
- Año de publicación
- 2006
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- With the discoveryofthe Sagittarius dwarf spheroidal, agalaxy caughtinthe processofmerging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100°, and the detection of an overdensity of stars in the direction of the constellation of Canis Major (CMa), apparently associated to the ring, has led to the widespread belief that a second galaxy being cannibalized by the Milky Way had been found. In this scenario, the overdensity would be the remaining core of the disrupted galaxy and the ring would be the tidal debris left behind. However, unlike the Sagittarius dwarf, which is well below the Galactic plane and whose orbit, and thus tidal tail, is nearly perpendicular to the plane of the Milky Way, the putative CMa galaxy and ring are nearly co-planar with the Galactic disc. This severely complicates the interpretation of observations. In this Letter, we show that our new description of the Milky Way leads to a completely different picture. We argue that the Norma-Cygnus spiral arm defines a distant stellar ring crossing Monoceros and the overdensity is simply a projection effect of looking along the nearby local arm. Our perspective sheds new light on a very poorly known region, the third Galactic quadrant, where CMa is located. © 2006 The Authors. Journal compilation © 2006 RAS.
Fil: Moitinho, A.. Centro de Astronomia E Astrofisica Da Universidade de Lisboa; Portugal
Fil: Vazquez, Ruben Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Carraro, Giovanni. Universidad de Chile; Chile. University of Yale; Estados Unidos
Fil: Baume, Gustavo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Giorgi, Edgard Ervar Salvador. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Lyra, W.. Uppsala Astronomical Observatory; Suecia - Materia
-
GALAXIES: DWARF
GALAXY: STELLAR CONTENT
GALAXY: STRUCTURE
OPEN CLUSTERS AND ASSOCIATIONS: GENERAL - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/39309
Ver los metadatos del registro completo
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Spiral structure of the third galactic quadrant and the solution to the Canis Major debateMoitinho, A.Vazquez, Ruben AngelCarraro, GiovanniBaume, Gustavo LuisGiorgi, Edgard Ervar SalvadorLyra, W.GALAXIES: DWARFGALAXY: STELLAR CONTENTGALAXY: STRUCTUREOPEN CLUSTERS AND ASSOCIATIONS: GENERALhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1With the discoveryofthe Sagittarius dwarf spheroidal, agalaxy caughtinthe processofmerging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100°, and the detection of an overdensity of stars in the direction of the constellation of Canis Major (CMa), apparently associated to the ring, has led to the widespread belief that a second galaxy being cannibalized by the Milky Way had been found. In this scenario, the overdensity would be the remaining core of the disrupted galaxy and the ring would be the tidal debris left behind. However, unlike the Sagittarius dwarf, which is well below the Galactic plane and whose orbit, and thus tidal tail, is nearly perpendicular to the plane of the Milky Way, the putative CMa galaxy and ring are nearly co-planar with the Galactic disc. This severely complicates the interpretation of observations. In this Letter, we show that our new description of the Milky Way leads to a completely different picture. We argue that the Norma-Cygnus spiral arm defines a distant stellar ring crossing Monoceros and the overdensity is simply a projection effect of looking along the nearby local arm. Our perspective sheds new light on a very poorly known region, the third Galactic quadrant, where CMa is located. © 2006 The Authors. Journal compilation © 2006 RAS.Fil: Moitinho, A.. Centro de Astronomia E Astrofisica Da Universidade de Lisboa; PortugalFil: Vazquez, Ruben Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Carraro, Giovanni. Universidad de Chile; Chile. University of Yale; Estados UnidosFil: Baume, Gustavo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Giorgi, Edgard Ervar Salvador. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Lyra, W.. Uppsala Astronomical Observatory; SueciaWiley Blackwell Publishing, Inc2006-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/39309Moitinho, A.; Vazquez, Ruben Angel; Carraro, Giovanni; Baume, Gustavo Luis; Giorgi, Edgard Ervar Salvador; et al.; Spiral structure of the third galactic quadrant and the solution to the Canis Major debate; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society: Letters; 368; 1; 5-20061745-3933CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1745-3933.2006.00163.xinfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/article/368/1/L77/959430info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:40:25Zoai:ri.conicet.gov.ar:11336/39309instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:40:25.312CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
title |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
spellingShingle |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate Moitinho, A. GALAXIES: DWARF GALAXY: STELLAR CONTENT GALAXY: STRUCTURE OPEN CLUSTERS AND ASSOCIATIONS: GENERAL |
title_short |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
title_full |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
title_fullStr |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
title_full_unstemmed |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
title_sort |
Spiral structure of the third galactic quadrant and the solution to the Canis Major debate |
dc.creator.none.fl_str_mv |
Moitinho, A. Vazquez, Ruben Angel Carraro, Giovanni Baume, Gustavo Luis Giorgi, Edgard Ervar Salvador Lyra, W. |
author |
Moitinho, A. |
author_facet |
Moitinho, A. Vazquez, Ruben Angel Carraro, Giovanni Baume, Gustavo Luis Giorgi, Edgard Ervar Salvador Lyra, W. |
author_role |
author |
author2 |
Vazquez, Ruben Angel Carraro, Giovanni Baume, Gustavo Luis Giorgi, Edgard Ervar Salvador Lyra, W. |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
GALAXIES: DWARF GALAXY: STELLAR CONTENT GALAXY: STRUCTURE OPEN CLUSTERS AND ASSOCIATIONS: GENERAL |
topic |
GALAXIES: DWARF GALAXY: STELLAR CONTENT GALAXY: STRUCTURE OPEN CLUSTERS AND ASSOCIATIONS: GENERAL |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
With the discoveryofthe Sagittarius dwarf spheroidal, agalaxy caughtinthe processofmerging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100°, and the detection of an overdensity of stars in the direction of the constellation of Canis Major (CMa), apparently associated to the ring, has led to the widespread belief that a second galaxy being cannibalized by the Milky Way had been found. In this scenario, the overdensity would be the remaining core of the disrupted galaxy and the ring would be the tidal debris left behind. However, unlike the Sagittarius dwarf, which is well below the Galactic plane and whose orbit, and thus tidal tail, is nearly perpendicular to the plane of the Milky Way, the putative CMa galaxy and ring are nearly co-planar with the Galactic disc. This severely complicates the interpretation of observations. In this Letter, we show that our new description of the Milky Way leads to a completely different picture. We argue that the Norma-Cygnus spiral arm defines a distant stellar ring crossing Monoceros and the overdensity is simply a projection effect of looking along the nearby local arm. Our perspective sheds new light on a very poorly known region, the third Galactic quadrant, where CMa is located. © 2006 The Authors. Journal compilation © 2006 RAS. Fil: Moitinho, A.. Centro de Astronomia E Astrofisica Da Universidade de Lisboa; Portugal Fil: Vazquez, Ruben Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Carraro, Giovanni. Universidad de Chile; Chile. University of Yale; Estados Unidos Fil: Baume, Gustavo Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Giorgi, Edgard Ervar Salvador. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Lyra, W.. Uppsala Astronomical Observatory; Suecia |
description |
With the discoveryofthe Sagittarius dwarf spheroidal, agalaxy caughtinthe processofmerging with the Milky Way, the hunt for other such accretion events has become a very active field of astrophysical research. The identification of a stellar ring-like structure in Monoceros, spanning more than 100°, and the detection of an overdensity of stars in the direction of the constellation of Canis Major (CMa), apparently associated to the ring, has led to the widespread belief that a second galaxy being cannibalized by the Milky Way had been found. In this scenario, the overdensity would be the remaining core of the disrupted galaxy and the ring would be the tidal debris left behind. However, unlike the Sagittarius dwarf, which is well below the Galactic plane and whose orbit, and thus tidal tail, is nearly perpendicular to the plane of the Milky Way, the putative CMa galaxy and ring are nearly co-planar with the Galactic disc. This severely complicates the interpretation of observations. In this Letter, we show that our new description of the Milky Way leads to a completely different picture. We argue that the Norma-Cygnus spiral arm defines a distant stellar ring crossing Monoceros and the overdensity is simply a projection effect of looking along the nearby local arm. Our perspective sheds new light on a very poorly known region, the third Galactic quadrant, where CMa is located. © 2006 The Authors. Journal compilation © 2006 RAS. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-05 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/39309 Moitinho, A.; Vazquez, Ruben Angel; Carraro, Giovanni; Baume, Gustavo Luis; Giorgi, Edgard Ervar Salvador; et al.; Spiral structure of the third galactic quadrant and the solution to the Canis Major debate; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society: Letters; 368; 1; 5-2006 1745-3933 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/39309 |
identifier_str_mv |
Moitinho, A.; Vazquez, Ruben Angel; Carraro, Giovanni; Baume, Gustavo Luis; Giorgi, Edgard Ervar Salvador; et al.; Spiral structure of the third galactic quadrant and the solution to the Canis Major debate; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society: Letters; 368; 1; 5-2006 1745-3933 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1745-3933.2006.00163.x info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/article/368/1/L77/959430 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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application/pdf application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Wiley Blackwell Publishing, Inc |
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Wiley Blackwell Publishing, Inc |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |