Signatures of long-lived spiral patterns.
Azimuthal age/color gradients across spiral arms are a signature of long-lived spirals. From a sample of 19 normal (or weakly barred) spirals where we have previously found azimuthal age/color gradient candidates, 13 objects were further selected if a two-armed grand-design pattern survived in a sur...
| Autor: | |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2013 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/2248 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2248 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Inspec/Galaxies: kinematics and dynamics info:eu-repo/classification/Inspec/Galaxies: photometry info:eu-repo/classification/Inspec/Galaxies: spiral info:eu-repo/classification/Inspec/Galaxies: stellar content info:eu-repo/classification/Inspec/Galaxies: structure info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 |
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Signatures of long-lived spiral patterns.ERIC EMMANUEL MARTINEZ GARCIAinfo:eu-repo/classification/Inspec/Galaxies: kinematics and dynamicsinfo:eu-repo/classification/Inspec/Galaxies: photometryinfo:eu-repo/classification/Inspec/Galaxies: spiralinfo:eu-repo/classification/Inspec/Galaxies: stellar contentinfo:eu-repo/classification/Inspec/Galaxies: structureinfo:eu-repo/classification/cti/1info:eu-repo/classification/cti/21info:eu-repo/classification/cti/21Azimuthal age/color gradients across spiral arms are a signature of long-lived spirals. From a sample of 19 normal (or weakly barred) spirals where we have previously found azimuthal age/color gradient candidates, 13 objects were further selected if a two-armed grand-design pattern survived in a surface density stellar mass map. Mass maps were obtained from optical and near-infrared imaging, by comparing with a Monte Carlo library of stellar population synthesis models that allowed us to obtain the mass-to-light ratio in the J-band, (M=L)J , as a function of (g - i) versus (i - J) color. The selected spirals were analyzed with Fourier methods in search for other signatures of long-lived modes related to the gradients, such as the gradient divergence toward corotation, and the behavior of the phase angle of the two-armed spiral in different wavebands, as expected from theory. The results show additional signatures of long-lived spirals in at least 50% of the objects.The Astrophysical Journal2013-02-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2248reponame:Repositorio Institucional del INAOEinstname:Instituto Nacional de Astrofísica, Óptica y Electrónicainstacron:INAOEengcitation:Martínez-García, Eric E. and González-Lópezlira, Rosa A., (2013), Signatures of long-lived spiral patterns, The Astrophysical Journal, Vol. 765(2):1-29info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:inaoe.repositorioinstitucional.mx:1009/22482024-08-28T03:23:06Z |
| dc.title.none.fl_str_mv |
Signatures of long-lived spiral patterns. |
| title |
Signatures of long-lived spiral patterns. |
| spellingShingle |
Signatures of long-lived spiral patterns. ERIC EMMANUEL MARTINEZ GARCIA info:eu-repo/classification/Inspec/Galaxies: kinematics and dynamics info:eu-repo/classification/Inspec/Galaxies: photometry info:eu-repo/classification/Inspec/Galaxies: spiral info:eu-repo/classification/Inspec/Galaxies: stellar content info:eu-repo/classification/Inspec/Galaxies: structure info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| title_short |
Signatures of long-lived spiral patterns. |
| title_full |
Signatures of long-lived spiral patterns. |
| title_fullStr |
Signatures of long-lived spiral patterns. |
| title_full_unstemmed |
Signatures of long-lived spiral patterns. |
| title_sort |
Signatures of long-lived spiral patterns. |
| dc.creator.none.fl_str_mv |
ERIC EMMANUEL MARTINEZ GARCIA |
| author |
ERIC EMMANUEL MARTINEZ GARCIA |
| author_facet |
ERIC EMMANUEL MARTINEZ GARCIA |
| author_role |
author |
| dc.subject.none.fl_str_mv |
info:eu-repo/classification/Inspec/Galaxies: kinematics and dynamics info:eu-repo/classification/Inspec/Galaxies: photometry info:eu-repo/classification/Inspec/Galaxies: spiral info:eu-repo/classification/Inspec/Galaxies: stellar content info:eu-repo/classification/Inspec/Galaxies: structure info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| topic |
info:eu-repo/classification/Inspec/Galaxies: kinematics and dynamics info:eu-repo/classification/Inspec/Galaxies: photometry info:eu-repo/classification/Inspec/Galaxies: spiral info:eu-repo/classification/Inspec/Galaxies: stellar content info:eu-repo/classification/Inspec/Galaxies: structure info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/21 info:eu-repo/classification/cti/21 |
| description |
Azimuthal age/color gradients across spiral arms are a signature of long-lived spirals. From a sample of 19 normal (or weakly barred) spirals where we have previously found azimuthal age/color gradient candidates, 13 objects were further selected if a two-armed grand-design pattern survived in a surface density stellar mass map. Mass maps were obtained from optical and near-infrared imaging, by comparing with a Monte Carlo library of stellar population synthesis models that allowed us to obtain the mass-to-light ratio in the J-band, (M=L)J , as a function of (g - i) versus (i - J) color. The selected spirals were analyzed with Fourier methods in search for other signatures of long-lived modes related to the gradients, such as the gradient divergence toward corotation, and the behavior of the phase angle of the two-armed spiral in different wavebands, as expected from theory. The results show additional signatures of long-lived spirals in at least 50% of the objects. |
| publishDate |
2013 |
| dc.date.none.fl_str_mv |
2013-02-21 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion |
| format |
article |
| status_str |
acceptedVersion |
| dc.identifier.none.fl_str_mv |
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2248 |
| url |
http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2248 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
citation:Martínez-García, Eric E. and González-Lópezlira, Rosa A., (2013), Signatures of long-lived spiral patterns, The Astrophysical Journal, Vol. 765(2):1-29 |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0 |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0 |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
The Astrophysical Journal |
| publisher.none.fl_str_mv |
The Astrophysical Journal |
| dc.source.none.fl_str_mv |
reponame:Repositorio Institucional del INAOE instname:Instituto Nacional de Astrofísica, Óptica y Electrónica instacron:INAOE |
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Instituto Nacional de Astrofísica, Óptica y Electrónica |
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INAOE |
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INAOE |
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Repositorio Institucional del INAOE |
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Repositorio Institucional del INAOE |
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1858175114000990208 |
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15.228081 |