| dc.creator | ERIC EMMANUEL MARTINEZ GARCIA | |
| dc.date | 2013-02-21 | |
| dc.date.accessioned | 2023-07-25T16:25:15Z | |
| dc.date.available | 2023-07-25T16:25:15Z | |
| dc.identifier | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2248 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7807429 | |
| dc.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. | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | The Astrophysical Journal | |
| dc.relation | 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 | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies: kinematics and dynamics | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies: photometry | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies: spiral | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies: stellar content | |
| dc.subject | info:eu-repo/classification/Inspec/Galaxies: structure | |
| dc.subject | info:eu-repo/classification/cti/1 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.subject | info:eu-repo/classification/cti/21 | |
| dc.title | Signatures of long-lived spiral patterns. | |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dc.audience | students | |
| dc.audience | researchers | |
| dc.audience | generalPublic | |
