ELLIPTICALS AND HIGH-REDSHIFT UNIVERSE: D iscussion
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Transcript of ELLIPTICALS AND HIGH-REDSHIFT UNIVERSE: D iscussion
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Francesco Calura INAF/O. A. Bologna
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Pagel, B., 2002, ASPC, 253, 509
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How do galaxies form? When do the stellar populations of their
sub-components form? What are the principal
feedback/quenching mechanisms? Scaling relations of ETG: can they be
reproduced w/in LCDM?
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(FC & Menci, 2011, MNRAS, 413, L1)
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(FC & Menci, 2011, MNRAS, 413, L1)
Obs.Slope=0.38
ModelSlope=-0.02
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(FC & Menci, 2011, MNRAS, 413, L1)
Obs.Slope=0.38
ModelSlope=0.03
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(FC & Menci, 2011, MNRAS, 413, L1)
Obs.Slope=0.38
ModelSlope=0.11
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(FC & Menci, 2011, MNRAS, 413, L1)
Obs.Slope=0.38
ModelSlope=0.21
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What is the chronology of the Hubble sequence? (And role of Main Sequence galaxies)
What have we learned (and what can we really learn ever) from numerical simulations and SAMs?
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‘Unsatisfied Observers’ (S. Lilly)
+Frustrated theoreticians
=
Lack of trust in ‘physical’ (i.e. fully cosmological) models
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Use of ‘Simple’ (i.e. analytical) models to describe galaxy evolution
Lilly et al. 2013
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Spheroids (at z>2) Discs (at z<2)
Fig. from Pipino et al., 2013, MNRAS, 432, 2541
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How do galaxies form? When do the stellar populations of their sub-
components form? What are the principal feedback/quenching
mechanisms? Scaling relations of ETG: can they be reproduced
w/in LCDM? What is the chronology of the Hubble sequence?
(And role of Main Sequence galaxies) What have we learned (and what can we really
learn ever) from numerical simulations and SAMs?
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How do metals escape from galaxies (ram pressure, winds…driven by which mechanism (Sne and/or AGN)
Is ICM typical of IGM (as traced by Lya-forest) in general?
Does either the metallicity or abundance pattern vary with z?