TY - JOUR
T1 - HI4PI: A full-sky Hi survey based on EBHIS and GASS
AU - Ben Bekhti, N.
AU - Flöer, L.
AU - Keller, R.
AU - Kerp, J.
AU - Lenz, D.
AU - Winkel, B.
AU - Bailin, J.
AU - Calabretta, M.R.
AU - Dedes, L.
AU - Ford, H.A.
AU - Gibson, B.K.
AU - Haud, U.
AU - Janowiecki, Steven
AU - Kalberla, P.M.W.
AU - Lockman, F.J.
AU - McClure-Griffiths, N.M.
AU - Murphy, T.
AU - Nakanishi, H.
AU - Pisano, D.J.
AU - Staveley-Smith, Lister
PY - 2016/10/1
Y1 - 2016/10/1
N2 - © 2016 ESO.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 4p 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 (?FWHM = 16'.2) and sensitivity (srms = 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.
AB - © 2016 ESO.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 4p 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 (?FWHM = 16'.2) and sensitivity (srms = 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.
U2 - 10.1051/0004-6361/201629178
DO - 10.1051/0004-6361/201629178
M3 - Article
SN - 0004-6361
VL - 594
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A116
ER -