1. AGN feedback in ellipticals
from spectra and SEDs
Kevin Schawinski (Oxford)
Marc Sarzi (Hertfordshire)
Claudia Maraston (Portsmouth)
Sugata Kaviraj (Oxford)
Seok-Joo Joo (Yonsei)
Sukyoung Yi (Yonsei)
Joseph Silk (Oxford)
Daniel Thomas
University of Portsmouth
Schawinski et al (2007, MNRAS, astro-ph/ )

2. Downsizing De Lucia et al 2006 Thomas et al 2005 AGN feedback
Quasar mode
Croton et al 2005
Radio mode
Nelan et al 2005; Bernardi et al 2006
Daniel Thomas - AGN feedback in early-type galaxies

3. Requirements Large sample w/o bias against star formation or AGN
Emission line diagnostics
Resolve recent star formation history
TP-AGB
Absorption indices
Element ratio effects
Eisenstein et al 2003
TMB
Daniel Thomas - AGN feedback in early-type galaxies

4. MOrphologically Selected Ellipticals from SDSS
MOSES
16,000 ellipticals
32,000 spirals
0.05<z<0.1, r < 16.8
3-d density estimator
Emission line diagnostics
Stellar populations
Schawinski, Thomas et al, MNRAS, in press
Daniel Thomas - AGN feedback in early-type galaxies

5. Separating star formation from AGN
Star forming
Transition
Seyfert
LINER
Baldwin et al 1981; Kewley et al 2001; Kauffmann et al 2003
Daniel Thomas - AGN feedback in early-type galaxies

6. AGN feedback in action Star forming Transition Seyfert LINER Passive
Schawinski et al (2007)
Daniel Thomas - AGN feedback in early-type galaxies

7. Recent star formation history
K. Schawinski (2007)
Absorption indices help
Daniel Thomas - AGN feedback in early-type galaxies

8. Evidence for evolutionary sequence
Daniel Thomas - AGN feedback in early-type galaxies

9. The timeline of AGN feedback
Daniel Thomas - AGN feedback in early-type galaxies

10. Implications for theory
Springel et al 2005
Daniel Thomas - AGN feedback in early-type galaxies

11. Summary Downsizing Suppression of late star formation in ellipticals
AGN feedback in galaxy formation models
MOSES
Ellipticals from SDSS
Derive recent star formation history
Inclusion of (Lick) absorption features helps
Use chemical evolution
Evidence for AGN feedback in ellipticals
Evolutionary sequence SF-AGN-quiescence
Time span > 500 Myr
Daniel Thomas - AGN feedback in early-type galaxies