We present a three dimensional map of extinction in the Northern Galactic Plane derived using photometry from the IPHAS survey. 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 as previously described by Sale (2012). In addition to mean extinction, we also measure differential extinction, which arises from the fractal nature of the ISM, 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 .
@article{arxiv.1406.0009,
title = {A 3D extinction map of the Northern Galactic Plane based on IPHAS photometry},
author = {S. E. Sale and J. E. Drew and G. Barentsen and H. J. Farnhill and R. Raddi and M. J. Barlow and J. Eislöffel and J. S. Vink and P. Rodríguez-Gil and N. J. Wright},
journal= {arXiv preprint arXiv:1406.0009},
year = {2015}
}
Comments
17 pages, 13 figures, accepted for publication in MNRAS. Data can be downloaded from http://www.iphas.org/extinction . References updated