Infrared properties of planetary nebulae with [WR] central stars
| Autor: | Grazyna Stasinska, S. K. Gorny, R. Tylenda, Ryszard Szczerba |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Physics
Infrared Mid infrared Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Planetary nebula Spectral line Stars Space and Planetary Science Homogeneous Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics Line (formation) |
| Zdroj: | Astronomy & Astrophysics. 377:1007-1015 |
| ISSN: | 1432-0746 0004-6361 |
| DOI: | 10.1051/0004-6361:20011050 |
| Popis: | We have gathered from the literature near and mid infrared (photometric and spectroscopic) data for Galactic planetary nebulae, with special attention to planetary nebulae surrounding Wolf-Rayet type central stars ((WR) PN). These data have been analyzed to obtain insight into the dust-properties of (WR) PN and their evolutionary status. We have found that a sizeable fraction of (WR) PN seems to contain hot dust (1000{2000 K), probably located in the winds of the central stars. The mean dust temperature is shown to decrease with decreasing (WC) spectral type. This is in line with suggestions that the (WC) sequence is an evolutionary sequence from late to early types. (WR) PN in dierent diagrams, when compared to those of non-(WR) PN, suggest that (WR) PN form a homogeneous class of planetary nebulae. There is an unusually large proportion of (WR) PN showing PAH features in their spectra. |
| Databáze: | OpenAIRE |
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