Shadows behind Neutral Clumps in Photoionized Regions
Open Access
- 1 August 1998
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 502 (2) , 695-707
- https://doi.org/10.1086/305946
Abstract
Shadows behind neutral clumps in photoionized regions can have a neutral core surrounded by gas that is photoionized by the diffuse flux produced by the nebula. We present a simple analytic model describing the configuration of such shadows. We also present numerical gasdynamic simulations of the relaxation 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.Keywords
This publication has 11 references indexed in Scilit:
- The Physics of the Interstellar MediumPublished by Taylor & Francis ,1997
- Two-Wind Interaction Models of the Proplyds in the Orion NebulaPublished by Springer Nature ,1997
- Cometary Knots in the Helix NebulaThe Astronomical Journal, 1996
- Jets in planetary nebulaePublished by Springer Nature ,1996
- Machine-gun jets from time-dependent sourcesMonthly Notices of the Royal Astronomical Society, 1993
- Mass-loaded astronomical flows – V. Tails: intermediate-scale structures in flowing clumpy mediaMonthly Notices of the Royal Astronomical Society, 1993
- Dust in the neutral globules of the Helix nebula, NGC 7293*Monthly Notices of the Royal Astronomical Society, 1992
- Active Galactic NucleiPublished by Springer Nature ,1989
- A Consistent Model of the Planetary Nebula NGC 7662The Astrophysical Journal, 1972
- The Ionization Structure of Planetary Nebulae -- IX LUMINOUS FILAMENTSMonthly Notices of the Royal Astronomical Society, 1972