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.

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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 deg 2 ) Detections or 1 mJy limits on 2000 VCC galaxies Tully-Fisher distances Search for intergalactic HI clouds

S E D

GOLDmine it

Young stars HI deficientHI normal Gavazzi et al b = present / past SFR  L H  / L H

The total available gas regulates the global star formation HI def

H  extent = disk NON deficient galaxy Non def R+HI HH

deficient galaxy truncated H  Emission def R+HI HH

Radii HI HH CO

Virgo follow-up ALFA: HI survey (2005) GALEX: UV survey (this year) AstroF: FIR survey (2005) Two complete samples: E+dE horizontal WFS strip at INT 127 galaxies (m<18) B imaging S+Irr ISO sample 118 galaxies (m<18)

VLT: velocity dispersion NIR imaging XMM: 10 fields E+dE: horizontal WFS strip

ISO sample Sub-mm H  imaging HI Arecibo Visible imag. (Megacam?) Optical spectr.

VCC 1987 HH R HI vcc1987

Cayatte VIRGO HI Cayatte et al. (1990) VCC1727 VCC 1615 VCC 307 VCC Mpc 1.5 Mpc

title G. Gavazzi Universita’ di Milano – Bicocca The Virgo cluster

HI Virgo

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