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Exploring the Virgo Cluster: Upgrades, Discoveries, and Surveys

This article highlights the major upgrades and advancements in studying the Virgo Cluster, including ground-screen technology, the Gregorian upgrade, completion of Road 22, and advancements in computer systems. It also discusses the ALFA project and its coverage of the Virgo Cluster, as well as the detection of galaxies and their distances using the Tully-Fisher method. The article also mentions the search for intergalactic HI clouds and the role of gas in regulating star formation.

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Exploring the Virgo Cluster: Upgrades, Discoveries, and Surveys

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  1. Title 5 major upgrades since 1991: 1: The ground screen 2: The Gregorian upgrade 3: Road 22 completed 4: Harris computers in the trash 5: ALFA G. Gavazzi Universita’ di Milano – Bicocca

  2. 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

  3. S E D

  4. GOLDmine http://goldmine.mib.infn.it.it

  5. Young stars HI normal HI deficient b = present / past SFR  LH / LH Gavazzi et al. 2002

  6. HI def The total available gas regulates the global star formation

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

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

  9. Radii HI H CO

  10. 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)

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

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

  13. vcc1987 R H HI VCC 1987

  14. VCC 1615 VCC 307 VCC 1987 VCC1727 VIRGO HI Cayatte 0.75 Mpc 1.5 Mpc Cayatte et al. (1990)

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

  16. HI Virgo

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