2002A&A...384..987T


Query : 2002A&A...384..987T

2002A&A...384..987T - Astronomy and Astrophysics, volume 384, 987-998 (2002/3-4)

Mass-loss rates of H-rich central stars of planetary nebulae as distance indicators?

TINKLER C.M. and LAMERS H.J.G.L.M.

Abstract (from CDS):

If the mass loss rate, {dot}(M), or the modified wind momentum, Π, of central stars of planetary nebulae (CSPN) is strictly related to the luminosity, the study of their winds can be used to derive their distance as suggested in the literature. However, the mass loss rates and modified wind momenta of a sample of 13 CSPN published in the literature show a separation into two groups, which differ by a factor 10 to 102 in Π. This is partly, but not completely, due to differences in the adopted methods for mass loss determinations, and partly due to differences in the adopted stellar parameters, mainly the effective temperature. We have adopted a homogeneous set of stellar parameters, based on the Zanstra method, the dynamical ages of the nebulae and on evolutionary tracks, and scaled the mass loss rates accordingly. The revised data show that there is a large jump in {dot}(M) and Π near Teff≃60000K, with {dot}(M) and Π being larger by a factor 10 to 102 for the cooler group of CSPN of spectral type Of, than for the hotter group of type O. This discontinuity is most likely due to a bi-stability jump. The revised data do not show a clear relation between Π and the luminosity. The consequences are discussed in terms of the post-AGB evolution theory and the radiation driven wind models.

Abstract Copyright:

Journal keyword(s): stars: distances - stars: early type - stars: evolution - stars: mass-loss - planetary nebulae: general

Simbad objects: 12

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Number of rows : 12
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 1535 PN 04 14 15.7689951134 -12 44 21.934169738   12.01 12.82     sdO3: 504 0
2 IC 418 PN 05 27 28.2060343141 -12 41 50.282659007   9.78 13.0     O7fp 1006 2
3 NGC 2392 PN 07 29 10.7669120392 +20 54 42.478515772     9.68     O6f 703 1
4 NGC 3242 PN 10 24 46.1335198512 -18 38 32.294434711   11.83 12.15     ~ 806 1
5 CPD-51 6744 PN 14 18 08.8856504204 -52 10 39.518062758   12.39 11.98     [WC] 148 0
6 HD 138403 PN 15 37 11.2073858949 -71 54 52.885863880   10.24 10.47 11.01   O8(f)ep 255 0
7 IC 4593 PN 16 11 44.5480003321 +12 04 17.033164436   10.91 10.84     O7fp 441 0
8 NGC 6210 PN 16 44 29.5195973291 +23 47 59.491267229   12.3 11.7     Of/[WR] 576 0
9 PN Tc 1 PN 17 45 35.2877697798 -46 05 23.713203258   11.30 11.49     PCyg 243 0
10 NGC 6543 PN 17 58 33.4042519454 +66 37 58.748961810   11.09 11.28     [WC] 1134 1
11 NGC 6826 PN 19 44 48.1500835472 +50 31 30.250916761   10.21 9.6     O6fp 705 0
12 NGC 7009 PN 21 04 10.8153350719 -11 21 48.581808296   12.48 12.07     ~ 972 1

    Equat.    Gal    SGal    Ecl

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2021.07.29-14:11:45

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