NewUBVRIcolour distributions in E-type galaxies
| Autor: | R. Michard, J. A. de Freitas Pacheco, Thais Eunice Pires Idiart |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Physics
Effective radius Surface brightness fluctuation Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Disc galaxy Galaxy Space and Planetary Science Elliptical galaxy Surface brightness Fundamental plane (elliptical galaxies) Lenticular galaxy Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astronomy & Astrophysics. 383:30-45 |
| ISSN: | 1432-0746 0004-6361 |
| DOI: | 10.1051/0004-6361:20011699 |
| Popis: | New colour distributions have been derived from wide field UBVRI frames for 36 northern bright elliptical galaxies and a few lenticulars. The classical linear representations of colours against $\log r$ were derived, with some improvements in the accuracy of the zero point colours and of the gradients. The radial range of significant measurements was enlarged both towards the galaxy center and towards the outskirts of each object. Thus, the “central colours”, integrated within a radius of 3´´, and the “outermost colours” averaged near the $\mu_V=24$ surface brightness could also be obtained. Some typical deviations of colour profiles from linearity are described. Colour-colour relations of interest are presented. Very tight correlations are found between the $U-V$ colour and the Mg 2 line-index, measured either at the Galaxian center or at the effective radius. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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