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
2016

Journal article


Rights
© ESO, 2016
Abstract

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.

Publisher
The University of Hull
Peer reviewed
Yes
Language
English
Extent
9 MB
Identifier
hull:13982

Journal

Journal title
Astronomy and astrophysics
Publication date
2016
Publisher
EDP sciences
DOI
10.1051/0004-6361/201629178
ISSN (Print)
0004-6361
ISSN (Electronic)
1432-0746
Volume
594
Start page
A116-1
End page
A116-15
Notes

This is a copy of an article published in Astronomy and astrophysics, 2016, v.594.

Link
Published article
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