1 / 12

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. Kingston, June 15th 2009. Chiara Tonini. Marie Curie Excellent Grant “UniMass” (PI: Claudia Maraston). in collaboration with Claudia Maraston, Daniel Thomas (ICG)

indra
Download Presentation

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

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. THE FIRST GALAXY FORMATION MODEL WITH THE TP-AGB: BASIC REVISION OF THE MASS-LUMINOSITY RELATION Kingston, June 15th 2009 Chiara Tonini Marie Curie Excellent Grant “UniMass” (PI: Claudia Maraston) 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. GalICS + M05 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. 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, in preparation

  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 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, in preparation

  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, in preparation

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

  10. Comparison with data at z=2 Star-forming galaxies Colour-colour relation --> stellar populations CT, Maraston, Thomas, Devriendt & Silk, in preparation

  11. 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, in preparation

More Related