title g. gavazzi universita di milano bicocca 5 major upgrades since 1991: 2: the gregorian upgrade...
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Title
G. Gavazzi
Universita’ di Milano – Bicocca
5 major upgrades since 1991:
2: The Gregorian upgrade
1: The ground screen
3: Road 22 completed
4: Harris computers in the trash
5: ALFA
ALFA full coverage of the Virgo cluster
(800 deg2)
• Detections or 1 mJy limits on 2000 VCC galaxies
• Tully-Fisher distances• Search for intergalactic HI clouds
S E D
GOLDmine
http
://go
ldm
ine.
mib
.infn
.it.it
Young starsHI deficientHI normal
Gavazzi et al. 2002
b = present / past SFR LH / LH
The total available gas regulates the global star formation
HI def
H extent = disk
NON deficient galaxy
Non def
R+HI H
deficient galaxy
truncated H Emission
def
R+HI H
Radii
HI H CO
Virgo follow-upALFA: HI survey (2005)GALEX: UV survey (this year)AstroF: FIR survey (2005)
Two complete samples:
E+dEhorizontal WFS strip at INT127 galaxies (m<18)B imaging
S+IrrISO sample 118 galaxies (m<18)
VLT: velocity dispersionNIR imagingXMM: 10 fields
E+dE: horizontal WFS strip
ISO sample
• Sub-mm• H imaging• HI Arecibo• Visible imag.(Megacam?)• Optical spectr.
VCC 1987
H R
HI
vcc1987
CayatteVIRGO HI
Cayatte et al. (1990)
VCC1727
VCC 1615 VCC 307
VCC 1987
0.75 Mpc
1.5 Mpc
title
G. Gavazzi
Universita’ di Milano – Bicocca
The Virgo cluster
HI Virgo