2005MNRAS.362.1286M

Query : 2005MNRAS.362.1286M

2005MNRAS.362.1286M - Mon. Not. R. Astron. Soc., 362, 1286-1294 (2005/October-1)

The kinematics of the large western knot in the halo of the young planetary nebula NGC 6543.

MITCHELL D.L., BRYCE M., MEABURN J., LOPEZ J.A., REDMAN M.P., HARMAN D., RICHER M.G. and RIESGO H.

Abstract (from CDS):

A detailed analysis of the dominant ionized knot in the halo of the planetary nebula NGC 6543 is presented. Observations were made at high spectral and spatial resolution of the [Oiii]λ5007-Åline using the Manchester echelle spectrometer combined with the 2.1-m San Pedro Martir Telescope. A 20-element multislit was stepped across the field to give almost complete spatial coverage of the large western knot and surrounding halo.

The spectra reveal, for the first time, gas flows around the kinematically inert knot. The gas flows are found to have velocities comparable to the sound speed as gas is photoevaporated off an ionized surface. No evidence is found of fast wind interaction with the knot, and we find it likely that the fast wind is still contained in a pressure-driven bubble in the core of the nebula. This rules out the possibility of the knot having its origin in instabilities at the interface of the fast and asymptotic giant branch (AGB) stellar winds. We suggest that the knot is embedded in the slowly expanding red giant wind, and that its surfaces are being continually photoionized by the central star.

Abstract Copyright: 2005 RAS

Journal keyword(s): circumstellar matter - stars: kinematics - stars: mass-loss - stars: winds, outflows - ISM: planetary nebulae: individual: NGC 6543

CDS comments: In Fig.2 : The overexposed star is probably BD+66 1065.

Simbad objects: 4

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Number of rows : 4

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NGC 2392	PN	07 29 10.7671398096	+20 54 42.474888072			9.68			O6f	740	2
2	IRC +10216	C*	09 47 57.40632	+13 16 43.5648						C9,5e	2455	0
3	NGC 6543	PN	17 58 33.4039587288	+66 37 58.750734000		11.09	11.28			[WC]	1197	2
4	NGC 7293	PN	22 29 38.5454047152	-20 50 13.747242408	11.894	13.158	13.524	13.689	13.898	DAO.5	983	1

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