Infrared properties of planetary nebulae with [WR] central stars

S. K. Górny, G. Stasińska, R. Szczerba, R. Tylenda
2001 Astronomy and Astrophysics  
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
more » ... perature 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 different 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.
doi:10.1051/0004-6361:20011050 fatcat:a5surshecbbm3lnvupohak7vhu