Shapes and shaping of the planetary nebulae IC 3568, NGC 40, and NGC 6543

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/114527· OSTI ID:5605571

Balick, B; Owen, R; Bignell, C R; Hjellming, R M

Radio and optical images of three compact planetary nebulae, NGC 6543, IC 3568, and NGC 40, are found to reveal a variety of morphological and ionization signatures of wind shaping and heating. Both NGC 6543 (one of the most morphologically complex planetaries in the sky) and IC 3568 (one of the simplest) exhibit large density changes on size scales corresponding to sound-crossing times of about a century, arguing that the density gradients are sustained by shocks driven by stellar winds. All of the available data show the structure and ionization of IC 3568 to conform to simple hydrodynamic models of nebulae that are shaped by interior stellar winds. NGC 6543 also shows very local changes in optical line ratios that are best understood in the same manner. 34 references.

• Research Organization: Washington Univ., Seattle; National Radio Astronomy Observatory, Socorro, NM
• OSTI ID: 5605571
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 94; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ELECTROMAGNETIC RADIATION
FLUIDS
GASES
HEATING
IONIZATION
IONIZED GASES
MORPHOLOGY
NEBULAE
PHOTOIONIZATION
PLANETARY NEBULAE
RADIATIONS
RADIOWAVE RADIATION
STELLAR ACTIVITY
STELLAR WINDS
VISIBLE RADIATION