Multi-Wavelength Characterization of the Outskirts of Spiral Galaxies

Bibcode
2010AIPC.1240..287B
DOI
10.1063/1.3458511
Bakos, Judit; Trujillo, Ignacio
Referencia bibliográfica

HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conference Proceedings, Volume 1240, pp. 287-288 (2010).

Fecha de publicación:
6
2010
Número de autores
2
Número de autores del IAC
0
Número de citas
1
Número de citas referidas
0
Descripción
We have explored late-type spiral galaxies with truncated radial surface brightness profiles. Based on the study of optical color profiles, [1] suggested that truncated (TYPE II) galaxies have a generally older stellar population in their outer regions: one observable consequence of this would be a strong dependence of the structural parameters of the outer disk on the observing wavelength. To corroborate this result, we obtained surface brightness profiles using data from GALEX(UV), SDSS(optical), 2MASS/UKIDSS(NIR) and SPITZER-IRAC(IR). We have characterized the behaviour of the outer disk by obtaining the ratio of the inner and outer scale-lengths. Here we show the example of NGC3184. Our results suggest that there is an existing general trend of the scale-length ratio: from bluer to redder bands the scale-length ratio decreases, which is in accordance with the stellar disk being dominated by an older stellar population in the outer disk.
Tipo
Sin árbitro
Galaxias espirales
Formación estelar
Galaxias espirales
Formación estelar

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