%0 Generic %1 jo2017farultraviolet %A Jo, Young-Soo %A Seon, Kwang-Il %A Min, Kyoung-Wook %A Edelstein, Jerry %A Han, Wonyong %D 2017 %K MilkyWay fluorescence gas molecular %T Far-ultraviolet fluorescent molecular hydrogen emission map of the Milky Way Galaxy %U http://arxiv.org/abs/1707.04992 %X We present the far-ultraviolet (FUV) fluorescent molecular hydrogen (H_2) emission map of the Milky Way Galaxy obtained with FIMS/SPEAR covering ~76% of the sky. The extinction-corrected intensity of the fluorescent H_2 emission has a strong linear correlation with the well-known tracers of the cold interstellar medium (ISM), including color excess E(B-V), neutral hydrogen column density N(H I), and H_alpha emission. The all-sky H_2 column density map was also obtained using a simple photodissociation region model and interstellar radiation fields derived from UV star catalogs. We estimated the fraction of H2 (f_H2) and the gas-to-dust ratio (GDR) of the diffuse ISM. The f_H2 gradually increases from <1% at optically thin regions where E(B-V) < 0.1 to ~50% for E(B-V) = 3. The estimated GDR is ~5.1 x 10^21 atoms cm^-2 mag^-1, in agreement with the standard value of 5.8 x 10^21 atoms cm^-2 mag^-1.

@misc{jo2017farultraviolet, abstract = {We present the far-ultraviolet (FUV) fluorescent molecular hydrogen (H_2) emission map of the Milky Way Galaxy obtained with FIMS/SPEAR covering ~76% of the sky. The extinction-corrected intensity of the fluorescent H_2 emission has a strong linear correlation with the well-known tracers of the cold interstellar medium (ISM), including color excess E(B-V), neutral hydrogen column density N(H I), and H_alpha emission. The all-sky H_2 column density map was also obtained using a simple photodissociation region model and interstellar radiation fields derived from UV star catalogs. We estimated the fraction of H2 (f_H2) and the gas-to-dust ratio (GDR) of the diffuse ISM. The f_H2 gradually increases from <1% at optically thin regions where E(B-V) < 0.1 to ~50% for E(B-V) = 3. The estimated GDR is ~5.1 x 10^21 atoms cm^-2 mag^-1, in agreement with the standard value of 5.8 x 10^21 atoms cm^-2 mag^-1.}, added-at = {2017-07-18T10:14:22.000+0200}, author = {Jo, Young-Soo and Seon, Kwang-Il and Min, Kyoung-Wook and Edelstein, Jerry and Han, Wonyong}, biburl = {https://www.bibsonomy.org/bibtex/2065ccb78c1dc594d0bf6061a8b78c6d4/miki}, description = {[1707.04992] Far-ultraviolet fluorescent molecular hydrogen emission map of the Milky Way Galaxy}, interhash = {8c4fb7ecebc837baef30d9f63fc97c45}, intrahash = {065ccb78c1dc594d0bf6061a8b78c6d4}, keywords = {MilkyWay fluorescence gas molecular}, note = {cite arxiv:1707.04992Comment: 24 pages, 15 figures, This is accepted for publication in ApJS at July 16, 2017}, timestamp = {2017-07-18T10:14:22.000+0200}, title = {Far-ultraviolet fluorescent molecular hydrogen emission map of the Milky Way Galaxy}, url = {http://arxiv.org/abs/1707.04992}, year = 2017 }