Aperture corrections for disk galaxy properties derived from the CALIFA survey Balmer emission lines in spiral galaxies

This work investigates the effect of the aperture size on derived galaxy properties for which we H alpha ve spatially-resolved optical spectra. We focus on some indicators of star formation activity and dust attenuation for spiral galaxies that have been widely used in previous work on galaxy evolut...

Descripción completa

Detalles Bibliográficos
Autores: Iglesias Páramo, J., Vílchez, J. M., Galbany, L., Sánchez, S. F., Rosales Ortega, F. F., Mast, D., García Benito, R., Husemann, B., Aguerri, J. A. L., Alves, J., Bekeraité, S., Bland-Hawthorn, J., Catalán Torrecilla, Cristina, De Amorim, A. L., De Lorenzo Cáceres, A., Ellis, S., Falcón Barroso, J., Flores, H., Florido, E., Gallazzi, A., Gomes, J. M., González Delgado, R. M., Haines, T., Hernández Fernández, J. D., Kehrig, C., López Sánchez, Á. R., Lyubenova, M., Marino, Raffaella Anna, Mollá, M., Monreal Ibero, A., Mourᾶo, A., Papaderos, P., Rodrigues, M., Sánchez Blázquez, Patricia, Spekkens, K., Stanishev, V., van de Ven, G., Walcher, C. J., Wisotzki, L., Zibetti, S., Ziegler, B.
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/33765
Acceso en línea:https://hdl.handle.net/20.500.14352/33765
Access Level:acceso abierto
Palabra clave:52
Digital Sky Survey
Star-Formation Rate
Classification
Population
Evolution
Universe
SDSS Mass
AGN
Astrofísica
Astronomía (Física)
Física atmosférica
2501 Ciencias de la Atmósfera
Descripción
Sumario:This work investigates the effect of the aperture size on derived galaxy properties for which we H alpha ve spatially-resolved optical spectra. We focus on some indicators of star formation activity and dust attenuation for spiral galaxies that have been widely used in previous work on galaxy evolution. We investigated 104 spiral galaxies from the CALIFA survey for which 2D spectroscopy with complete spatial coverage is available. From the 3D cubes we derived growth curves of the most conspicuous Balmer emission lines (H alpha, H beta) for circular apertures of different radii centered at the galaxy's nucleus after removing the underlying stellar continuum. We find that the H alpha flux (f(H alpha)) growth curve follows a well-defined sequence with aperture radius that shows a low dispersion around the median value. From this analysis, we derived aperture corrections for galaxies in different magnitude and redshift intervals. Once stellar absorption is properly accounted for, the f (H alpha)/f(H beta) ratio growth curve shows a smooth decline, pointing toward the absence of differential dust attenuation as a function of radius. Aperture corrections as a function of the radius are provided in the interval [0.3, 2.5]R-50. Finally, the H alpha equivalent-width (EW(H alpha)) growth curve increases with the size of the aperture and shows a very high dispersion for small apertures. This prevents us from using reliable aperture corrections for this quantity. In addition, this result suggests that separating star-forming and quiescent galaxies based on observed EW(H alpha) through small apertures will probably result in low EW(H alpha) star-forming galaxies begin classified as quiescent.

Similares en LA Referencia