“HI巡天”的版本间差异
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===ALFALFA=== |
===ALFALFA=== |
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*Arecibo Legacy Fast ALFA Survey (ALFALFA) will map 7000 deg2 and is expected to detect more than 25,000 extragalactic HI |
*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. |
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:*the spatial resolution of the grid to 4.3'x3.8' |
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line sources out to redshifts of 18,000 km/s. |
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:*spectral velocity resolution is 11 km/s after smoothing is applied, |
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* Catalog [https://arxiv.org/abs/2011.02588] |
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* data webpage [http://egg.astro.cornell.edu/alfalfa/data/index.php] |
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*发现了一下Ha dots [[https://arxiv.org/abs/2112.02135] |
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==Galaxy== |
==Galaxy== |
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*Nançay Interstellar Baryons Legacy Extragalactic Survey (NanCay Radio Telescop 100m) |
*Nançay Interstellar Baryons Legacy Extragalactic Survey (NanCay Radio Telescop 100m) |
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#Must have both SDSS magnitudes and optical spectrum; |
#Must have both SDSS magnitudes and optical spectrum; |
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#Must lie within the local volume (900<cz<12,000 km s−1); |
#Must lie within the [[local volume]] (900<cz<12,000 km s−1); |
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#Uniform sampling of each 0.5 magnitude wide bin in absolute z-band magnitude, Mz; |
#Uniform sampling of each 0.5 magnitude wide bin in absolute z-band magnitude, Mz; |
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#Preferentially observe nearby objects; |
#Preferentially observe nearby objects; |
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2021年12月12日 (日) 14:00的最新版本
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.
- the spatial resolution of the grid to 4.3'x3.8'
- spectral velocity resolution is 11 km/s after smoothing is applied,
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 [4]
NIBLES
- Nançay Interstellar Baryons Legacy Extragalactic Survey (NanCay Radio Telescop 100m)
- Must have both SDSS magnitudes and optical spectrum;
- Must lie within the local volume (900<cz<12,000 km s−1);
- Uniform sampling of each 0.5 magnitude wide bin in absolute z-band magnitude, Mz;
- Preferentially observe nearby objects;
- 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[5]