Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (112) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (62)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Central star temperatures of optically thick planetary nebulae and a distance-independent test of dredge-up theory
Authors:
Kaler, James B.; Jacoby, George H.
Affiliation:
AA(Illinois, University, Urbana), AB(Kitt Peak National Observatory, Tucson, AZ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 15, 1989, p. 871-880. (ApJ Homepage)
Publication Date:
10/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Abundance, Planetary Nebulae, Stellar Magnitude, Stellar Temperature, Nitrogen, Optical Thickness, Oxygen, Stellar Interiors, Stellar Luminosity, Ultraviolet Radiation
DOI:
10.1086/167957
Bibliographic Code:
1989ApJ...345..871K

Abstract

The effective temperatures are calculated and the V magnitudes are predicted for the central stars of 62 optically thick planetary nebulas by forcing agreement between the hydrogen and ionized helium Zanstra temperatures. Comparison to the measured V for 34 of the stars shows good agreement and validates the method for the other 28, for which no Zanstra analysis is available. In many cases the predicted V magnitudes are actually likely to be better than the currently measured values. The comparison suggests that optical depth and not an ultraviolet excess is the dominant cause of the Zanstra discrepancy. Nebular N/O correlates positively with effective temperature, demonstrating that the N/O-core mass relation rises more steeply than predicted by dredge-up theory.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences


More Article Retrieval Options

HELP for Article Retrieval
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints