Galaxy dynamical masses, gas masses
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Transcript of Galaxy dynamical masses, gas masses
‘3D’ Data Sets are ABSOLUTELY Crucial to Answer the Important Questions of Galaxy Formation
and Evolution• Galaxy dynamical masses, gas masses
• Spatially resolved distributions of SF, gas, stellar populations, metallicities
• Rotation curves & connection to halo; angular momentum distribution
• Co-evolution of massive black holes and host galaxies
• Roles of mergers vs secular evolution
• Bulge vs disk formation
• Roles of stellar and AGN feedback
The ‘3D’ State of the Art at High Redshift
0 km/s +200 km/s+65 km/s +400(±130) km/s +130 km/s
FWHM0.5(4 kpc) –200 km/s–260(±33) km/s –130 km/s –65 km/s
BzK–15504 at z 2.38
Hα channel mapsSINFONI + AO(Genzel et al.
2006)
From N. Förster Schreiber’s talk
CO channel maps (v=40 km s-1) at z=4.1(!); Riechers et al. 2008From F.
Walter’s talk
3D Observations of AGN and High-z Galaxies: Some Questions for
Discussion1) Rephrasing Eric’s question: We’re now doing “low-z” science at high redshift! What are the most important
lessons to be learned from nearby galaxies?- extracting/modeling dynamics- best line tracers for star formation, dynamics- best local Universe templates- synergies between optical/IR and (sub)mm 3D observations (unfortunately no HI at high-z!)- …
3D Observations of AGN and High-z Galaxies: Some Questions for
Discussion2) Are high-z disks really disks? Are high-z mergers really mergers? Is it all outflows?
How do we distinguish amongst them? What about minor mergers?
3) How do we establish the M- relation at high-z? How well calibrated is it at low-z? Do black holes form first? What does this mean for “co-evolution of black holes and host galaxies”?
3D Observations of AGN and High-z Galaxies: Some Questions for
Discussion4) What is the relative importance of cold accretion vs mergers in galaxy formation? How do we get an
observational handle on “cold accretion” at high-z ?
5) What improvements/considerations should be made to simulations (of mergers, cold accretion, etc.) based on the data?
6) Lots of other questions?