The tiny-scale atomic structure: gas cloudlets or scintillation phenomenon ?
Astrophysics
2009-11-10 v1
Abstract
We present preliminary results from the recent multi-epoch HI absorption measurements toward several pulsars using the Arecibo telescope. We do not find significant variations in optical depth profiles over periods of 4 months and 9 years. The upper limits on the optical depth variations in directions of B0823+26 and B1133+16 are similar on scales of 10--20, 350 and 500 AU. The large number of non detections of the tiny scale atomic structure suggests that the AU-sized structure is not ubiquitous in the interstellar medium.
Cite
@article{arxiv.astro-ph/0307002,
title = {The tiny-scale atomic structure: gas cloudlets or scintillation phenomenon ?},
author = {S. Stanimirovic and J. M. Weisberg and A. Hedden and K. Devine and T. Greent and S. B. Anderson},
journal= {arXiv preprint arXiv:astro-ph/0307002},
year = {2009}
}
Comments
To appear in the proceedings of "Magnetic fields and star formation: theory versus observations", held in Madrid, April 21-25 2003. Uses Kluwer latex style file