The nature of galactic bulges from SAURON absorption line strength maps
We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on samp...
| Main Authors: | , , , , , , , , , , , , |
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| 格式: | Journal article |
| 語言: | English |
| 出版: |
2006
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| _version_ | 1826264096422494208 |
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| author | Peletier, R Falcón-Barroso, J Ganda, K Bacon, R Cappellari, M Davies, R De Zeeuw, P Emsellem, E Krajnović, D Kuntschner, H McDermid, R Sarzi, M Van De Ven, G |
| author_facet | Peletier, R Falcón-Barroso, J Ganda, K Bacon, R Cappellari, M Davies, R De Zeeuw, P Emsellem, E Krajnović, D Kuntschner, H McDermid, R Sarzi, M Van De Ven, G |
| author_sort | Peletier, R |
| collection | OXFORD |
| description | We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on sample of Falcn-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. © 2007 International Astronomical Union. |
| first_indexed | 2024-03-06T20:02:17Z |
| format | Journal article |
| id | oxford-uuid:27b82c55-cc3d-4c87-96f5-8feec03a9de2 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:02:17Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:27b82c55-cc3d-4c87-96f5-8feec03a9de22022-03-26T12:08:33ZThe nature of galactic bulges from SAURON absorption line strength mapsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:27b82c55-cc3d-4c87-96f5-8feec03a9de2EnglishSymplectic Elements at Oxford2006Peletier, RFalcón-Barroso, JGanda, KBacon, RCappellari, MDavies, RDe Zeeuw, PEmsellem, EKrajnović, DKuntschner, HMcDermid, RSarzi, MVan De Ven, GWe discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on sample of Falcn-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. © 2007 International Astronomical Union. |
| spellingShingle | Peletier, R Falcón-Barroso, J Ganda, K Bacon, R Cappellari, M Davies, R De Zeeuw, P Emsellem, E Krajnović, D Kuntschner, H McDermid, R Sarzi, M Van De Ven, G The nature of galactic bulges from SAURON absorption line strength maps |
| title | The nature of galactic bulges from SAURON absorption line strength maps |
| title_full | The nature of galactic bulges from SAURON absorption line strength maps |
| title_fullStr | The nature of galactic bulges from SAURON absorption line strength maps |
| title_full_unstemmed | The nature of galactic bulges from SAURON absorption line strength maps |
| title_short | The nature of galactic bulges from SAURON absorption line strength maps |
| title_sort | nature of galactic bulges from sauron absorption line strength maps |
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