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THE FIRST GALAXY FORMATION MODEL WITH THE TP-AGB: BASIC REVISION OF THE MASS-LUMINOSITY RELATION

THE FIRST GALAXY FORMATION MODEL WITH THE TP-AGB: BASIC REVISION OF THE MASS-LUMINOSITY RELATION. Obergurgl, December 13th 2009. Chiara Tonini. in collaboration with Claudia Maraston, Daniel Thomas (ICG) Julien Devriendt, Joe Silk (University of Oxford). THE GALAXY FORMATION MODEL.

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THE FIRST GALAXY FORMATION MODEL WITH THE TP-AGB: BASIC REVISION OF THE MASS-LUMINOSITY RELATION

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  1. THE FIRST GALAXY FORMATION MODEL WITH THE TP-AGB: BASIC REVISION OF THE MASS-LUMINOSITY RELATION Obergurgl, December 13th 2009 Chiara Tonini in collaboration with Claudia Maraston, Daniel Thomas (ICG) Julien Devriendt, Joe Silk (University of Oxford)

  2. THE GALAXY FORMATION MODEL GALICS: Hatton et al. 2003 MNRAS 343, 75 GALaxies In Cosmological Simulations Hybrid model: N-body + SAM Box size: 150 Mpc from z=35.59 Number of particles: Galactic mass: Semi-analytics baryonic cooling onto disks merger-driven morphology+secular evolution star formation feedback from Sne metallicity evolution AGN feedback quenching of SF in satellites dynamical friction, tidal stripping dust stellar populations spectra

  3. Input stellar population models: M05 vs PEGASE TP-AGB Maraston 2005 MNRAS 362, 799 (M05)

  4. Results Theoretical colour-magnitude relation: very red! CT, Maraston, Devriendt, Thomas & Silk, 2009 MNRAS 396L 36T

  5. Conselice et al. 2007 at same stellar mass Results Theoretical mass-luminosity relation CT, Maraston, Devriendt, Thomas & Silk, 2009 MNRAS 396L 36T

  6. Monaco et al. 2007 Bower et al. 2006 Menci et al. 2006 Cole et al. 2000 Baugh et al. 2005 M05 PEGASE TP-AGB AGN FEEDBACK Results Theoretical K-band luminosity function De Lucia & Blaizot 2007 The gap between the M05 (TP-AGB) and the PEGASE (no TP-AGB) runs is comparable to the spread induced by different recipes of AGN feedback CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

  7. Comparison with data: samples Excellent quality of photometry: 7 nearly-passively evolving galaxies at 1.4<z<2.7 (sp) HUDF, singled out by BzK criterion, 4000A break Early-type morphology, not star-forming, not much dust, star age ~ 0.2-2 Gyr Maraston et al. 2006 ApJ 652 85 95 star-forming galaxies at 1.7<z<2.3 (sp) GOODS-S, singled out by BzK criterion Dickinson et al., in preparation CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

  8. Stellar masses: Model: extinction curve: Calzetti Comparison with data at z=2 Colour-magnitude relation --> mass, age and luminosity Nearly-passive galaxies, ages ~0.2-2 Gyr 24 micron --> measured dust signal is low CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

  9. extinction curve: Calzetti Comparison with data at z=2 Star-forming galaxies Colour-magnitude relation CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

  10. Comparison with data at z=2 Star-forming galaxies, colour-magnitude relation Other effects than TP-AGB; nebular emission CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

  11. Comparison with data at z=2 Star-forming galaxies Colour-colour relation --> stellar populations CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

  12. Conclusions “Red& Dead” galaxies are alive!!! The model reproduces high redshift galaxy data Red colours and high near-IR luminosities can be reached in the models without invoking high ages, large masses or large dust reddening both in nearly-passive and star-forming galaxies CT, Maraston, Thomas, Devriendt & Silk, arXiv:0910.0015, minor revs

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