| Issue |
EAS Publications Series
Volume 75-76, 2015
Conditions and Impact of Star Formation
|
|
|---|---|---|
| Page(s) | 143 - 146 | |
| Section | Star Formation: Physical and Chemical Conditions, Feedback | |
| DOI | https://doi.org/10.1051/eas/1575024 | |
| Published online | 20 May 2016 | |
R. Simon, R. Schaaf and J. Stutzki (eds)
EAS Publications Series, 75–76 (2015) 143-146
HI-to-H2 Transitions in the Perseus Molecular Cloud
1 Raymond and Beverly Sackler School of Physics & Astronomy, Tel Aviv University, Ramat Aviv 69978, Israel
2 Laboratoire AIM, CEA/IRFU/Service d'Astrophyque, Bât. 709, 91191 Gif-sur-Yvette, France
3 LERMA, Observatoire de Paris, PSL Research University, CNRS, UMR8112, 92190 Meudon, France
e-mail: shmuelbi@mail.tau.ac.il
We apply the Sternberg et al. ([13] hereafter S14) theoretical model to analyze HI and H2 observations in the Perseus molecular cloud. We constrain the physical properties of the HI shielding envelopes and the nature of the Hi-to-H2 transitions. Our analysis (Bialy et al. [3]) implies that in addition to cold neutral gas (CNM), less dense thermally-unstable gas (UNM) significantly contributes to the shielding of the H2 cores in Perseus.
© EAS, EDP Sciences, 2016