2001A&A...378L..41H


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.19CET22:30:33

2001A&A...378L..41H - Astronomy and Astrophysics, volume 378, L41-44 (2001/11-1)

The discovery of the ``21'' µm and ``30'' µm emission features in Planetary Nebulae with Wolf-Rayet central stars.

HONY S., WATERS L.B.F.M. and TIELENS A.G.G.M.

Abstract (from CDS):

We report the discovery of the ``21''µm and ``30''µm features in the planetary nebulae around the hydrogen-deficient stars HD 826 and HD 158269. The carriers of these features are known to be produced in outflows around carbon-rich stars. This discovery demonstrates that the bulk of the dust in these nebulae has been produced during a carbon-rich phase before the atmospheres of these stars became hydrogen poor. This is the first time that the ``21''µm feature has been detected in any planetary nebula. It shows that once formed its carrier can survive the formation of the nebula and the exposure to the UV radiation of the hot central star. This means that the carrier of ``21''µm feature is not transient: the absence of the feature sets limits on the production of its carrier.

Abstract Copyright:

Journal keyword(s): circumstellar matter - planetary nebulae: individual: NGC 40, NGC 6369 - stars: mass-loss - stars: evolution

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 - 2021
#notes
1 NGC 40 PN 00 13 01.0170260109 +72 31 19.032886305   11.63 11.46     [WC8] 593 2
2 HD 56126 pA* 07 16 10.2589670319 +09 59 47.953674864   9.20 8.32     F0/5Ia 304 0
3 NGC 6369 PN 17 29 20.4566547788 -23 45 34.771598164   16.6 12.00     [WC4] 304 0
4 PN A66 58 PN 19 18 20.476 +01 46 59.62           [WC4] 292 0
5 HD 187885 pA* 19 52 52.7031438648 -17 01 50.293465852   9.25 8.68 8.32   F2/6Ia 170 0
6 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2348 1

    Equat.    Gal    SGal    Ecl

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2021.01.19-22:30:33

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