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.

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.

Citation

Sale, S., Drew, J., Barentsen, G., Farnhill, H., Raddi, R., Barlow, M., …Wright, N. (2014). A 3D extinction map of the northern Galactic plane based on IPHAS photometry. Monthly Notices of the Royal Astronomical Society, 2907-2922. https://doi.org/10.1093/mnras/stu1090

• Acceptance Date: May 29, 2014
• Publication Date: Oct 1, 2014
• 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