Presentation on theme: "Current work on AO NACO archive data on deep fields: SR across the field limit mag. morphology NICMOS VLT-NACO ghosts."— Presentation transcript:
Current work on AO NACO archive data on deep fields: SR across the field limit mag. morphology NICMOS VLT-NACO ghosts
Current work on AO NACO spectra of high-z quasars (prop. Maiolino) arcsec
Galaxies at “high” redshift Tests of ΛCDM : Few large (M>10 11 M ) halos at z=3 Few centrifugally supported large disks at z>2 Large increase in galaxy size from z=3 1.E Fundamental plane 2.E stellar gradients 3.Disk dynamical mass
Fundamental plane E merging of many fragments R e μ e 0.8 σ 0 1.4 scatter ~ 5% dynamics, morphology and stellar population M/L, age cluster – field difference van Dokkum 2001
Fundamental plane E Selection of Elliptical at z~2: spectra morphology Stanford et al 2003 Waddinton et al 2002 van dokkum et al 2003 Trujillo et al 2003 EROS VIMOS -> NO!
Fundamental plane E z~2: R e ~ 0.2” R iso ~ 0.6” K~20 -> below spectroscopic limit ? Proiezione sul piano R e μ e (Kormendy rel.)
Color distribution in Ellipticals E in the local universe show a moderate change in stellar population with radius (redder in the nuclei) 25% of the E in the HDFN show blue cores 1.metallicity gradients?(expected) 2.Age gradients?(only from merging) 3.both? 4.evolution into local E? spatially resolved spectra and colors (age-sensitive vs. metal-sensitive tests) Manateau et al 2001 Hinkley et al 2003 Project 1: K-band imaging and spectroscopy (R ~ 2000) of E with K ~20
Disk evolution Gas cooling and contracting in a dark matter halo Late formation for large disks : 1.1e-4 Mpc-3 disks with R e >3.6kpc at z ~3 Dynamical mass output of the cosmological simulations van Dokkum et al 2001 Erb et al 2003 Moorwood et al 2003 large disk, z=1.34
Evoluzione dei dischi z~2 - R e ~ 0.4 – 0.7” - K ~ 20-21 Erb et al 2003 Keck, 1 hour, H Project 2: Project 2: spectroscopy of disks of K ~20
THE problem Not easy to find a nearby star... Mannucci et al., 2001
Your consent to our cookies if you continue to use this website.