The Galactic NH - AV Relation and its Application to Historical Galactic SNRs
High Energy Astrophysical Phenomena
2013-06-28 v1
Abstract
We refine a classic relation between the hydrogen column density (NH) and optical extinction (Av) by employing 39 Galactic Supernova Remnants (SNRs) with X-rays, optical and/or infra-red data available. We find NH = (1.69+/-0.07)*10^21 Av cm^(-2) mag^(-1) . Applying this relation to three Galactic SNRs with good historical records allows us to further constrain either their progenitor's distances or magnitudes, which is independent access to their distances.
Keywords
Cite
@article{arxiv.1306.6506,
title = {The Galactic NH - AV Relation and its Application to Historical Galactic SNRs},
author = {Wen-Wu Tian and Hongquan Su and F. Y. Xiang},
journal= {arXiv preprint arXiv:1306.6506},
year = {2013}
}
Comments
Accepted for publication in NARIT Conference Series (NCS), 2 pages, 2 tables