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The Nature of Galactic Bulges from SAURON Absorption Line Strength Maps
| Content Provider | Scilit |
|---|---|
| Author | Peletier, Reynier F. Falcón-Barroso, Jesús Ganda, Katia Bacon, Roland Cappellari, Michele Davies, Roger L. de Zeeuw, P. Tim Emsellem, Eric Krajnović, Davor Kuntschner, Harald McDermid, Richard M. Sarzi, Marc van de Ven, Glenn |
| Copyright Year | 2006 |
| Description | We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices Hβ, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and Hβ and central velocity dispersion with the same relation for the edge-on sample of Falcón-Barroso et al. (2002) we derive a picture in which the central regions of Sa galaxies contain at least 2 components: one (or more) thin, disc-like component, often containing recent star formation, and another, elliptical-like component, consisting of old stars and rotating more slowly, dominating the light above the plane. If one defines a bulge to be the component responsible for the light in excess of the outer exponential disc, then many Sa-bulges are dominated by a thin, disc-like component containing recent star formation. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/AE7A6D0A2F5E40EBC7E1E052A4583DE2/S1743921307008836a.pdf/div-class-title-the-nature-of-galactic-bulges-from-sauron-absorption-line-strength-maps-div.pdf |
| Ending Page | 488 |
| Page Count | 4 |
| Starting Page | 485 |
| ISSN | 17439213 |
| e-ISSN | 17439221 |
| DOI | 10.1017/s1743921307008836 |
| Journal | Proceedings of the International Astronomical Union |
| Issue Number | S241 |
| Volume Number | 2 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2006-12-01 |
| Access Restriction | Open |
| Subject Keyword | Proceedings of the International Astronomical Union Astronomy and Astrophysics Spiral Stellar Content Bulges |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
