1997A&A...328..598S


Query : 1997A&A...328..598S

1997A&A...328..598S - Astronomy and Astrophysics, volume 328, 598-601 (1997/12-2)

Spectroscopy of the central stars of three evolved planetary nebulae.

SAURER W., WERNER K. and WEINBERGER R.

Abstract (from CDS):

We present results of a spectroscopic project that aims at investigations of stars in the upper left part of the HRD. We observed the central stars of the three old planetary nebulae PN G011.4+17.9, PN G308.2+07.7, and PN G332.5-16.9. The spectra (echelle) were analysed by fitting the H and HeII lines with theoretical profiles from a grid of non-LTE model atmospheres. The models are composed of H and He and disregard metal opacities. The three nuclei appear to be very hot (Teff near 105K) and comparison with post-AGB evolutionary tracks reveals that the masses range between 0.55 and 0.75M; the central star of PN G332.5-16.9 shows an enrichment in He and probably also in C and N.

Abstract Copyright:

Journal keyword(s): white dwarfs - planetary nebulae: individual: PN G011.4+17.9, PN G308.2+07.7, PN G332.5-16.9 - stars abundances - stars: fundamental parameters

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 - 2022
#notes
1 PN MeWe 1-3 PN 13 28 04.9296351462 -54 41 58.813215163           ~ 22 0
2 DHW 1-2 PN 17 06 55.0365171611 -09 46 59.072787409           ~ 20 0
3 PN HaTr 6 PN 17 51 52.835 -60 23 21.93           ~ 16 0
4 PN HaTr 7 PN 17 54 09.4487563943 -60 49 57.659265728   14.88 15.11 15.31 14.80 ~ 26 0

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2021.11.28-22:58:41

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