ALFALFA survey
E918812
The ALFALFA survey is a large-scale astronomical project that used the Arecibo radio telescope to map extragalactic neutral hydrogen (HI) across a significant portion of the sky, greatly enhancing our understanding of the distribution of gas-rich galaxies in the nearby universe.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical survey
ⓘ
extragalactic HI survey ⓘ radio survey ⓘ |
| abbreviation | ALFALFA NERFINISHED ⓘ |
| contributedTo |
constraints on cosmological models using HI-selected galaxies
ⓘ
identification of ultra-compact high-velocity clouds ⓘ studies of galaxy environment and HI content ⓘ studies of low surface brightness galaxies ⓘ studies of void galaxies ⓘ |
| dataFormat | publicly released catalogs ⓘ |
| dataProduct |
HI line spectra
ⓘ
HI source catalog ⓘ galaxy HI masses ⓘ |
| dataRelease |
40 percent ALFALFA catalog
ⓘ
70 percent ALFALFA catalog ⓘ alpha.100 catalog NERFINISHED ⓘ |
| field |
cosmology
ⓘ
extragalactic astronomy ⓘ radio astronomy ⓘ |
| fullName | Arecibo Legacy Fast ALFA survey NERFINISHED ⓘ |
| hasHigher |
angular resolution than HIPASS
ⓘ
sensitivity than previous large HI surveys ⓘ spectral resolution than HIPASS ⓘ |
| hostFacility | Arecibo radio telescope NERFINISHED ⓘ |
| improvesOn | HI Parkes All Sky Survey NERFINISHED ⓘ |
| isLegacySurveyOf | Arecibo Observatory NERFINISHED ⓘ |
| observes |
21 cm line emission
ⓘ
extragalactic HI ⓘ gas-rich galaxies ⓘ neutral hydrogen ⓘ |
| redshiftRange | nearby universe ⓘ |
| scienceGoal |
identify low-mass and dwarf galaxies
ⓘ
map extragalactic neutral hydrogen ⓘ measure HI mass function of galaxies ⓘ search for dark galaxies candidates ⓘ study distribution of gas-rich galaxies in the nearby universe ⓘ study large-scale structure traced by HI ⓘ |
| skyCoverage |
high Galactic latitude sky
ⓘ
thousands of square degrees ⓘ |
| spectralLine | HI 21 cm line ⓘ |
| surveyType | blind HI survey ⓘ |
| targetRegion | local universe ⓘ |
| telescopeLocation | Arecibo, Puerto Rico NERFINISHED ⓘ |
| usesInstrument |
Arecibo L-band Feed Array
NERFINISHED
ⓘ
Arecibo Observatory NERFINISHED ⓘ |
| usesMethod | drift-scan observing mode ⓘ |
| wavelengthBand | radio ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.