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J/ApJS/98/659 Galactic PNe statistical distance scale (Zhang 1995)
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A statistical distance scale for galactic planetary nebulae
Zhang C.Y.
<Astrophys. J. Suppl. Ser. 98, 659 (1995)>
=1995ApJS...98..659Z
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ADC_Keywords: Planetary nebulae ; Stars, distances
Keywords: distance scale - planetary nebulae: general
Description:
A statistical distance scale is proposed. It is based on the
correlation between the ionized mass and the radius and the
correlation between the radio continuum surface brightness temperature
and the nebular radius. The proposed statistical distance scale is an
average of the two distances obtained using the correlations. These
correlations, calibrated on the 132 planetary nebulae with
well-determined individual distances by Zhang, can reproduce not only
the average distance of a sample of Galactic Bulge planetary nebulae
exactly at the distance to the Galactic center, but also the expected
gaussian distribution of their distances around the Galactic center.
This new distance scale is applied to 647 Galactic planetary nebulae.
It is estimated that this distance scale can be accurate on average to
35%-50%. Our statistical distance scale is in good agreement with the
one recently proposed by Van de Steene and Zijlstra
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 78 134 Planetary nebulae with individually determined
distances
table1.tex 113 159 LaTeX version of table1.dat
table3.dat 72 647 Catalog of statistical distances of planetary
nebulae
table3.tex 100 675 LaTeX version of table3.dat
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See also:
V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+ 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Common name
9- 16 A8 --- PK Perek & Kohoutek name
18- 22 F5.2 kpc Dist Individually determined distance
24- 27 I4 mJy S5GHz 5 GHz (6 cm) radio flux density
29- 33 F5.1 arcsec Diam Diameter of nebula
35- 41 F7.2 K Tb Radio Brightness Temperature
43- 47 F5.3 pc Rad Radius of nebula
49- 54 E6.1 solMass Mi Ionized gas mass of nebula
56- 60 F5.2 kpc DMi Statistical distance derived from
mass-radius relation
62- 66 F5.2 kpc DTb Statistical distance from Tb - R relation
68- 72 F5.2 kpc Df Mean of DMi and DTb adopted as final result (1)
74- 78 F5.1 % Delta ? Fractional difference between Df and Dist
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Note (1): In Table 1 of the paper, Dm should read Df.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Common name
11- 18 A8 --- PK PK name
19- 24 F6.1 mJy S5GHz 5 GHz (6 cm) radio flux density
26- 30 F5.1 arcsec Diam Diameter of nebula in arcsec
32- 34 I3 --- Ref References for the previous columns (1)
36- 42 F7.2 K Tb Radio Brightness Temperature
44- 48 F5.2 kpc DMi Statistical distance derived from
mass-radius relation
50- 54 F5.2 kpc DTb Statistical distance from Tb - R relation
56- 60 F5.2 kpc Df Mean of DMi and DTb adopted as final result (2)
62- 66 F5.2 kpc D(VSZ) ? Distance from Van de Steene and Zijstra (1995)
68- 72 F5.2 kpc D(CKS) ? Distance from Cahn, Kaler & Stanghellini (1992)
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Note (1): Reference numbers are:
1: Pottasch (1994A&A...289..261P)
2: Aaquist & Kwok (1990A&AS...84..229A)
3: Zijlstra et al. (1989A&AS...79..329Z)
4: Milne & Aller (1975A&A....38..183M)
5: Milne (1979A&AS...36..227M)
6: Roelfsema et al. (1991A&A...251..611R)
7: Cahn et al. (1992A&AS...94..399C)
8: Pottasch & Zijlstra (1994A&A...289..261P)
Note (2): In Table 3 of the paper, Dm should read Df.
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Acknowledgements: <zhang@iras.ucalgary.ca>
References:
Aaquist & Kwok, 1990 A&AS 84, 229 =1990A&AS...84..229A
Cahn et al., 1992 A&AS 94, 399 =1992A&AS...94..399C
Milne, 1979 A&AS 36, 227 =1979A&AS...36..227M
Milne & Aller, 1975 A&A 38, 183 =1975A&A....38..183M
Pottasch, 1984 Planetary nebulae (Dordrecht: Reidel)
Pottasch & Zijlstra, 1994 A&A 289, 261 =1994A&A...289..261P
Roelfsema et al., 1991 A&A 251, 611 =1991A&A...251..611R
Van de Steene and Zijlstra, 1994, =1994A&AS..108..485V
Van de Steene and Zijlstra, 1995, A&A 293, 541 =1995A&A...293..541V
Zijlstra et al., 1989 A&AS 79, 329 =1989A&AS...79..329Z
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(End) Patricia Bauer [CDS] 28-Aug-1996