1999ApJ...513L.135C


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST11:25:10

1999ApJ...513L.135C - Astrophys. J., 513, L135-L138 (1999/March-2)

Water ice, silicate, and polycyclic aromatic hydrocarbon emission features in the infrared space observatory spectrum of the carbon-rich planetary nebula CPD -56°8032.

COHEN M., BARLOW M.J., SYLVESTER R.J., LIU X.-W., COX P., LIM T., SCHMITT B. and SPECK A.K.

Abstract (from CDS):

Combined Infrared Space Observatory Short-Wavelength Spectrometer and Long-Wavelength Spectrometer spectroscopy is presented of the late WC-type planetary nebula nucleus CPD -56°8032 and its carbon-rich nebula. The extremely broad coverage (2.4-197 µm) enables us to recognize the clear and simultaneous presence of emission features from both oxygen- and carbon-rich circumstellar materials. Removing a smooth continuum highlights bright emission bands characteristic of polycyclic aromatic hydrocarbons in the 3-14 µm region, bands from crystalline silicates longward of 18 µm, and the 43 and 62 µm bands of crystalline water ice. We discuss the probable evolutionary state and history of this unusual object in terms of (a) a recent transition from an O-rich to a C-rich outflow following a helium shell flash or (b) a carbon-rich nebular outflow encountering an O-rich comet cloud.

Abstract Copyright:

Journal keyword(s): Infrared: ISM: Lines and Bands - ISM: Planetary Nebulae: Individual: Alphanumeric: CPD -56 8032

Status at CDS:  

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 PN Vo 1 PN 06 59 26.4078328215 -79 38 47.129323563   16.7 15.8     [WC10] 93 0
2 IRAS 09371+1212 pA* 09 39 53.96 +11 58 52.6           K7II/III 156 0
3 WRAY 15-1269 PN 14 59 53.4814028450 -54 18 07.524725528 12.12 12.17 11.64 11.63   [WC11] 227 0
4 CPD-56 8032 PN 17 09 00.86008 -56 54 48.0957 11.24 11.48 11.04     [WC10] 247 0
5 NGC 6302 PN 17 13 44.339 -37 06 10.95   7.1 10.10     ~ 755 1
6 HD 184738 PN 19 34 45.2337512278 +30 30 58.951476338   10.41 10.44     [WC9] 918 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-11:25:10

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