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The Nature of Galactic Bulges from SAURON Absorption Line Strength Maps
| Content Provider | Semantic Scholar |
|---|---|
| Author | Peletier, Reynier Falcón-Barroso, Jésus Ganda, Katia Bacon, Roland Cappellari, Michele Davies, Roger L. Zeeuw, Patrick De Emsellem, Eric Krajnovíc, Davor Kuntschner, Harald McDermid, Richard M. Sarzi, Marc Ven, G. W. J. Van De |
| Copyright Year | 2007 |
| Abstract | We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices Hβ, Mg b 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, disclike 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. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/astro-ph/0702256v1.pdf |
| Alternate Webpage(s) | http://cds.cern.ch/record/1015935/files/0702256.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Dietary Iron Earth bulge Field electron emission GUCY2C protein, human Image scaling Map Offset binary Stars, Celestial Sulfanilamide Time complexity Velocity (software development) |
| Content Type | Text |
| Resource Type | Article |
