HI巡天

Blind Survey

HIPASS

• The HI Parkes All-Sky Survey (HIPASS) covered 30000 deg2 and produced a final catalog of around 5000 HI detections with a median redshift of 2800 km/s.

ALFALFA

• Arecibo Legacy Fast ALFA Survey (ALFALFA) will map 7000 deg2 and is expected to detect more than 25,000 extragalactic HI

line sources out to redshifts of 18,000 km/s.

Galaxy

AGES

• Arecibo Galaxy Environment Survey (AGES), will cover a total area of 200 deg2 (divided into 13 predesignated regions to sample different environments) to greater depth

THINGS

• The H I Nearby Galaxy Survey (THINGS)," a high spectral (≤5.2 km s–1) and spatial (~6) resolution survey of H I emission in 34 nearby galaxies obtained using the NRAO Very Large Array (VLA).
• public data [1]

NIBLES

• Nançay Interstellar Baryons Legacy Extragalactic Survey (NanCay Radio Telescop 100m)

1. Must have both SDSS magnitudes and optical spectrum;
2. Must lie within the local volume (900<cz<12,000 km s−1);
3. Uniform sampling of each 0.5 magnitude wide bin in absolute z-band magnitude, Mz;
4. Preferentially observe nearby objects;
5. No a priori selection on color.

• 这种on source的观测比ALFALFA这种盲测的好更高信噪比，但是还是有一些星系用了Arecibo做了follow up的定点观测，灵敏度更高，可以到mJy以下，(可以探测Lr < 10^8.5的蓝星系)。参见[2]