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A 3D extinction map of the northern Galactic plane based on IPHAS photometry

Sale, S.E.; Drew, J.E.; Barentsen, G.; Farnhill, H.J.; Raddi, R.; Barlow, M.J.; Eislöffel, J.; Vink, J.S.; Rodríguez-Gil, P.; Wright, N.J.

A 3D extinction map of the northern Galactic plane based on IPHAS photometry Thumbnail


Authors

S.E. Sale

J.E. Drew

G. Barentsen

H.J. Farnhill

R. Raddi

M.J. Barlow

J. Eislöffel

J.S. Vink

P. Rodríguez-Gil



Abstract

We present a 3D map of extinction in the northern Galactic plane derived using photometry from the INT/WFC Photometric Ha Survey of the northern Galactic plane. The map has fine angular (~10 arcmin) and distance (100 pc) sampling allied to a significant depth (5 kpc). We construct the map using a method based on a hierarchical Bayesian model described in a previous article by Sale. In addition to mean extinction, we also measure differential extinction, which arises from the fractal nature of the interstellar medium, and show that it will be the dominant source of uncertainty in estimates of extinction to some arbitrary position. The method applied also furnishes us with photometric estimates of the distance, extinction, effective temperature, surface gravity, and mass for ~38 million stars.
Both the extinction map and the catalogue of stellar parameters are made publicly available via http://www.iphas.org/extinction.

Acceptance Date May 29, 2014
Publication Date Oct 1, 2014
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Pages 2907-2922
DOI https://doi.org/10.1093/mnras/stu1090
Keywords surveys, stars, fundamental parameters, dust, extinction, ISM, structure
Publisher URL http://dx.doi.org/10.1093/mnras/stu1090

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