HI4PI: A full-sky Hi survey based on EBHIS and GASS

N. Ben Bekhti; L. Flöer; R. Keller; J. Kerp; D. Lenz; B. Winkel; J. Bailin; M. R. Calabretta; L. Dedes; H. A. Ford; B. K. Gibson; U. Haud; S. Janowiecki; P. M.W. Kalberla; F. J. Lockman; N. M. McClure-Griffiths; T. Murphy; H. Nakanishi; D. J. Pisano; L. Staveley-Smith

doi:10.1051/0004-6361/201629178

HI4PI: A full-sky Hi survey based on EBHIS and GASS

N. Ben Bekhti, L. Flöer, R. Keller, J. Kerp, D. Lenz, B. Winkel^*, J. Bailin, M. R. Calabretta, L. Dedes, H. A. Ford, B. K. Gibson, U. Haud, S. Janowiecki, P. M.W. Kalberla, F. J. Lockman, N. M. McClure-Griffiths, T. Murphy, H. Nakanishi, D. J. Pisano, L. Staveley-Smith

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

675 Citations (Scopus)

Abstract

Context. Measurement of the Galactic neutral atomic hydrogen (H i) column density, N_{H i}, and brightness temperatures, T_B, 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 (ν_FWHM = 16′.2) and sensitivity (σ_rms = 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.

Original language	English
Article number	A116
Journal	Astronomy and Astrophysics
Volume	594
DOIs	https://doi.org/10.1051/0004-6361/201629178
Publication status	Published - 1 Oct 2016

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Ben Bekhti, N., Flöer, L., Keller, R., Kerp, J., Lenz, D., Winkel, B., Bailin, J., Calabretta, M. R., Dedes, L., Ford, H. A., Gibson, B. K., Haud, U., Janowiecki, S., Kalberla, P. M. W., Lockman, F. J., McClure-Griffiths, N. M., Murphy, T., Nakanishi, H., Pisano, D. J., & Staveley-Smith, L. (2016). HI4PI: A full-sky Hi survey based on EBHIS and GASS. Astronomy and Astrophysics, 594, Article A116. https://doi.org/10.1051/0004-6361/201629178

@article{66b90ad32ef241a1948932e436094e3c,

title = "HI4PI: A full-sky Hi survey based on EBHIS and GASS",

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 (νFWHM = 16′.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.",

keywords = "ISM: atoms, Surveys, Techniques: spectroscopic",

author = "{Ben Bekhti}, N. and L. Fl{\"o}er and R. Keller and J. Kerp and D. Lenz and B. Winkel and J. Bailin and Calabretta, {M. R.} and L. Dedes and Ford, {H. A.} and Gibson, {B. K.} and U. Haud and S. Janowiecki and Kalberla, {P. M.W.} and Lockman, {F. J.} and McClure-Griffiths, {N. M.} and T. Murphy and H. Nakanishi and Pisano, {D. J.} and L. Staveley-Smith",

note = "Publisher Copyright: {\textcopyright} 2016 ESO.",

year = "2016",

month = oct,

day = "1",

doi = "10.1051/0004-6361/201629178",

language = "English",

volume = "594",

journal = "Astronomy and Astrophysics",

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Ben Bekhti, N, Flöer, L, Keller, R, Kerp, J, Lenz, D, Winkel, B, Bailin, J, Calabretta, MR, Dedes, L, Ford, HA, Gibson, BK, Haud, U, Janowiecki, S, Kalberla, PMW, Lockman, FJ, McClure-Griffiths, NM, Murphy, T, Nakanishi, H, Pisano, DJ & Staveley-Smith, L 2016, 'HI4PI: A full-sky Hi survey based on EBHIS and GASS', Astronomy and Astrophysics, vol. 594, A116. https://doi.org/10.1051/0004-6361/201629178

TY - JOUR

T1 - HI4PI

T2 - 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, S.

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, L.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - 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 (νFWHM = 16′.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.

AB - 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 (νFWHM = 16′.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.

KW - ISM: atoms

KW - Surveys

KW - Techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=84992679389&partnerID=8YFLogxK

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 -

HI4PI: A full-sky Hi survey based on EBHIS and GASS

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