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http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2248| Signatures of long-lived spiral patterns. | |
| ERIC EMMANUEL MARTINEZ GARCIA | |
| Acceso Abierto | |
| Atribución-NoComercial-SinDerivadas | |
| Galaxies: kinematics and dynamics Galaxies: photometry Galaxies: spiral Galaxies: stellar content Galaxies: structure | |
| 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. | |
| The Astrophysical Journal | |
| 21-02-2013 | |
| Artículo | |
| Inglés | |
| Estudiantes Investigadores Público en general | |
| Martínez-García, Eric E. and González-Lópezlira, Rosa A., (2013), Signatures of long-lived spiral patterns, The Astrophysical Journal, Vol. 765(2):1-29 | |
| ASTRONOMÍA Y ASTROFÍSICA | |
| Versión aceptada | |
| acceptedVersion - Versión aceptada | |
| Aparece en las colecciones: | Artículos de Astrofísica |
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| 29. Signatures of Long-lived Spiral Patterns.pdf | 1.18 MB | Adobe PDF | Visualizar/Abrir |