Isolated starless cores in IRDCs in the Hi-GAL survey
Abstract
In a previous paper we identified cores within infrared dark clouds (IRDCs). We regarded those without embedded sources as the least evolved, and labelled them starless. Here we identify the most isolated starless cores and model them using a three-dimensional, multi-wavelength, Monte Carlo, radiative transfer code. We derive the cores' physical parameters and discuss the relation between the mass, temperature, density, size and the surrounding interstellar radiation field (ISRF) for the cores. The masses of the cores were found not to correlate with their radial size or central density. The temperature at the surface of a core was seen to depend almost entirely on the level of the ISRF surrounding the core. No correlation was found between the temperature at the centre of a core and its local ISRF. This was seen to depend, instead, on the density and mass of the core.
Keywords
Cite
@article{arxiv.1205.1647,
title = {Isolated starless cores in IRDCs in the Hi-GAL survey},
author = {L. A. Wilcock and D. Ward-Thompson and J. M. Kirk and D. Stamatellos and A. Whitworth and C. Battersby and D. Elia and G. A. Fuller and A. DiGiorgio and M. J. Griffin and S. Molinari and P. Martin and J. C. Mottram and N. Peretto and M. Pestalozzi and E. Schisano and H. A. Smith and M. A. Thompson},
journal= {arXiv preprint arXiv:1205.1647},
year = {2015}
}
Comments
12 pages + appendix, 12 figures, 4 tables. Only a sample of images in Appendix A is given due to size restrictions. Accepted by MNRAS