HI4PI : A full-sky HI survey based on EBHIS and GASS
Ben Bekhti, Nadya, 1978-; Flöer, Lars; Keller, Reinhard; Kerp, Juergen; Lenz, Daniel, 1988-; Winkel, Benjamin; Bailin, Jeremy; Calabretta, Mark R. (Mark Raymond); Dedes, Leonidas, 1975-; Ford, H. A.; Gibson, Brad K.; Haud, Urmas; Janowiecki, Steven; Kalberla, Peter Michael Werner; Lockman, Felix J.; McClure-Griffiths, Naomi M., 1975-; Murphy, Tara; Nakanishi, Hiroyuki; Pisano, Daniel (D. J.); Staveley-Smith, Lister
EA Milne Centre for Astrophysics
Surveys; ISM : atoms; Techniques : spectroscopic
- © ESO, 2016
Context. Measurement of the Galactic neutral atomic hydrogen (H i) column density, NH i, and brightness temperatures, TB, is of high scientific value for a broad range of astrophysical disciplines. In the past two decades, one of the most-used legacy H i datasets has been the Leiden/Argentine/Bonn Survey (LAB).
Aims. We release the H i 4π survey (HI4PI), an all-sky database of Galactic H i, which supersedes the LAB survey.
Methods. The HI4PI survey is based on data from the recently completed first coverage of the Effelsberg-Bonn H i Survey (EBHIS) and from the third revision of the Galactic All-Sky Survey (GASS). EBHIS and GASS share similar angular resolution and match well in sensitivity. Combined, they are ideally suited to be a successor to LAB.
Results. The new HI4PI survey outperforms the LAB in angular resolution (ϑFWHM = 16́́.2) and sensitivity (σrms = 43 mK). Moreover, it has full spatial sampling and thus overcomes a major drawback of LAB, which severely undersamples the sky. We publish all-sky column density maps of the neutral atomic hydrogen in the Milky Way, along with full spectroscopic data, in several map projections including HEALPix.
- The University of Hull
- Peer reviewed
- 9 MB
- Journal title
- Astronomy and astrophysics
- Publication date
- EDP sciences
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This is a copy of an article published in Astronomy and astrophysics, 2016, v.594.
- Published article