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Record Details

Record 28 of 9520
Neutral matter in planetary nebulae
External Online Source: doi:10.1086/132895
Author and Affiliation:
Dinerstein, Harriet L.(Texas, University, Austin, United States)
Abstract: A review of current studies of neutral envelopes is presented with particular attention given to the use of the envelopes as test cases for understanding the ionization and thermal structure of photodissociation regions. The study of near-IR H2 emission is discussed with detailed spectra given for a few planetary nebulae, and airborne observations of far-IR atomic lines are discussed. These two methods can discern photodissociation regions with warm gas and UV flux is fairly prominent. The use of resonance-absorption-line spectroscopy is also reviewed with respect to the analysis of the Na D lines, and thereby allows the measurement of integrated columns of material through the shell. The methods provide evidence for the notion that planetary nebulae consist of more than just ionized material; large amounts of neutral and molecular material are being confirmed, which has important implications for the mass-loss episode of the nebulae.
Publication Date: Aug 01, 1991
Document ID:
19910066116
(Acquired Nov 28, 1995)
Accession Number: 91A50739
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astronomical Society of the Pacific, Publications (ISSN 0004-6280); 103; 861-864
Publisher Information: United States
Contract/Grant/Task Num: NAG2-372
Financial Sponsor: NASA; United States
Organization Source: Texas Univ.; Austin, TX, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: NEUTRAL GASES; PLANETARY NEBULAE; RED GIANT STARS; WHITE DWARF STARS; H II REGIONS; IONIZED GASES; STELLAR STRUCTURE
Imprint And Other Notes: (Rice University and University of Texas, Texas-Mexico Conference on Astrophysics: Plasmas in Astrophysics, 3rd, Rice University, Houston, TX, Feb. 14, 15, 1991) Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Aug. 1991, p. 861-864.
Availability Source: Other Sources
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