Shadows behind neutral clumps in photoionized regions

Authors
Canto, J Raga, A Steffen, W Shapiro, PR
Citation
J. Canto et al., Shadows behind neutral clumps in photoionized regions, ASTROPHYS J, 502(2), 1998, pp. 695-707
Citations number
14
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
502
Issue
2
Year of publication
1998
Part
1
Pages
695 - 707
Database
ISI
SICI code
0004-637X(19980801)502:2<695:SBNCIP>2.0.ZU;2-X
Abstract
Shadows behind neutral clumps in photoionized regions can have a neutral co re surrounded by gas that is photoionized by the diffuse flux produced by t he nebula. We present a simple analytic model describing the configuration of such shadows. We also present numerical gasdynamic simulations of the re laxation to the final, steady state. These models have clear applications ( e.g., to the cometary knots in the Helix Nebula) but can also be applied in other astrophysical contexts.