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J/A+A/327/736       Planetary nebulae properties (Stasinska+ 1997)

On the mass distribution of planetary nebulae central stars Stasinska G., Gorny S.K., Tylenda R. <Astron. Astrophys. 327, 736 (1997)> =1997A&A...327..736S (SIMBAD/NED BibCode)
ADC_Keywords: Planetary nebulae ; Abundances ; Morphology Keywords: planetary nebulae: general - stars: AGB and post-AGB - stars: white dwarfs - stars: fundamental parameters Abstract: We apply a method, described in Gorny et al. (1997, Cat. J/A+A/318/256), to derive the masses of 125 central stars of planetary nebulae (PN). This method is self-consistent and distance-independent. It requires the knowledge of the nebular Hβ fluxes, angular radii and expansion velocities, as well as the stellar visual magnitudes. This method is based on a simple model for the evolution of planetary nebulae, in which the central stars evolve according to the theoretical models of Bloecker (1995, Cat. J/A+A/299/755) and Schoenberner (1983ApJ...272..708S). The results are dependent on the assumed total nebular mass. Nevertheless, for any reasonable total nebular mass distribution, we find that the range in planetary nebulae central star masses is very restricted: more than 80% of the objects have a central star mass between 0.55 and 0.65M. We show how to convert, in this mass range, the observed PN central star mass distribution into a zero-age post-AGB star mass distribution. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 86 49 Planetary nebulae properties and derived central stars masses, evolutionary ages and distances
See also: J/A+A/303/893 : Planetary nebulae with WR-type nuclei (Gorny+, 1995) J/A+A/318/256 : Planetary nebulae properties (Gorny+ 1997) J/A+A/299/755 : Stellar evolution. II. Post-AGB (Bloecker+, 1995) Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 10 A10 --- PNG PNG (Cat. V/84) designation 12- 19 A8 --- Name Name 21- 22 A2 --- Mtype Morphological type (1) 23 A1 --- u_Mtype [:] Uncertainty flag on morphological type 25- 28 F4.2 [K] log(THI) logarithm of HI Zanstra temperature 30- 33 F4.2 [solLum] log(LHI) logarithm of HI Zanstra luminosity 35- 39 F5.2 mag Mv Central star absolute visual magnitude 41- 45 F5.2 [pc] log(Rad) logarithm of nebular radius 47- 51 F5.2 [mW/m2/sr] log(SuBr) logarithm of nebular surface brightness in Hβ 53- 57 F5.2 [mW/m2/sr] log(Sv) logarithm of S_v parameter 59- 62 F4.1 kpc DistS Shklovsky distance 64 A1 --- l_Mass [>] Lower limit flag on central star's mass 65- 69 F5.3 solMass Mass Derived mass of the central star 71- 75 F5.3 solMass MassUp ? Upper limit to the central star's mass (where existing, one case only) 77- 80 F4.1 10+3yr Age Derived evolutionary age 82- 85 F4.1 kpc Dist Derived distance
Note (1): Morphological type description: e,E,EH: elliptical nebulae B,BE: bipolar nebulae P,PE: point symmetric nebulae I: irregular nebulae
Acknowledgements: Slawomir K. Gorny
(End) Patricia Bauer [CDS] 01-Aug-1997
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