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Science with ALFALFA, etc. Riccardo Giovanelli. May 2004. Credit: M. Steinmetz. Credit: Virgo collaboration (MPIfAp). Here: place a Lyman alpha absorption spectrum in the l.o.s to 3C273 (Weyman et al.). HIMF. where. Zwaan et al. 97:. Rosenberg & Schneider 02:. [Mpc -3 dex -1 ].

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slide1

Science with ALFALFA, etc.

Riccardo Giovanelli

May 2004

slide6

HIMF

where

Zwaan et al. 97:

Rosenberg & Schneider 02:

[Mpc-3 dex-1]

slide7

Science Topics to be addressed byALFALFA:

1 The investigation of the HI Mass Function

2 High Mass HI sources

3 Environmental variations of the HI properties of galaxies

4 The low HI Column density environment of galaxies

5 Environmental differences in the HI Mass function

6 HI absorbers and the link to Lyman a absorbers

7 OH Megamasers at intermediate redshift

slide8

Survey Beam Area rms min MHI Ndet ts Nlos

arcmin sq. deg. (@ 13 km/s) @ 1 Mpc sec

AHISS 3.3 13 0.8 1.0x105 66 var 6,000

ADBS 3.3 430 3.5 4.2x105 265 12140,000

HIPASS 15. 30,000 14 1.9x106 ~5000 460 500,000

HIJASS 12. (13,000) 14 1.9x106 (?) 3500 (380,000)

J-Virgo 12 32 14 1.9x106 31 3500 900

HIDEEP 15 32 3.2 4.4x105 173 9000 670

AO-DEEP 3.5 0.4 0.05 0.7x104 40? 252,000 105

ALFALFA 3.5 12,000 3.0 4.0x105 12,000? 12 106

VAVA 3.5 900 1.3 1.3x105 3,000? 12x5 300,000

ZOA 3.5 1000 0.5 0.7x105 8,000? 300 330,000

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HI Mass Function

in the local Universe

Parkes HIPASS survey: Zwaan et al. 2003