Interstellar dust and distances to planetary nebulae

Journal Article · Sun Apr 01 04:00:00 EST 1973 · Astrophys. J., v. 181, no. 1, pp. 135-145

DOI:https://doi.org/10.1086/152036· OSTI ID:4418522

Lutz, J H

S>UBV and H gamma data were used to construct diagrams of color excess versus distance for early-type stars within 1 deg 5 of six planetary nebulae. These diagrams were used in conjunction with the observed extinctions of the planetaries to derive distances for NGC 6741, NGC 6894, NGC 7026, NGC 7354, IC 1747, and IC 289. This method is independent of assumptions about optical thickness in the nebular shell or evolutionary stage. Assumptions of electron temperature and R, the ratio of total to selective absorption, are required. The method is limited in accuracy by the patchiness of the interstellar medium and by the possibility that R may vary from point to point in the Galaxy. (auth)

• Research Organization: Univ. of Illinois, Chicago
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-003257
• OSTI ID: 4418522
• Journal Information: Astrophys. J., v. 181, no. 1, pp. 135-145, Journal Name: Astrophys. J., v. 181, no. 1, pp. 135-145; ISSN ASJOA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*PLANETARY NEBULAE-- DISTANCE
ABSORPTION
COLOR
COSMIC DUST
ELECTRON TEMPERATURE
INTERSTELLAR SPACE
N56200* --Physics (Astrophysics & Cosmology)--Stars
PHOTOMETRY
STARS