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J/A+A/280/581 Chemical abundances of PNe (Pasquali+, 1993)
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Chemical behaviour of planetary nebulae and galactic abundance gradients
Pasquali A., Perinotto M.
<Astron. Astrophys. 280, 581 (1993)>
=1993A&A...280..581P
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ADC_Keywords: Planetary nebulae ; Abundances
Keywords: planetary nebulae: general - ISM: abundances - galaxy: abundances.
Abstract:
All modern determinations of chemical abundances of He/H, O/H, C/H,
N/H and Ne/H in 277 galactic Planetary Nebulae have been used to
update our knowledge of the chemical behavior of Planetary Nebulae, as
a whole and in Peimbert's groups. The data have been used to set up
the problem of the chemical gradients in the Galaxy from Planetary
Nebulae. The Interstellar Medium has been found to be more
inhomogeneous in the past epochs of the Galaxy than in the present
time.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 62 Chemical abundances of the PNe not included
in Table 1 of Perinotto (1991ApJS...76..687P)
table2.dat 43 222 Distances and velocities of PNe with known
chemical abundances
table3.dat 105 27 Planetary Nebulae of type I
table4.dat 106 9 Planetary Nebulae of type IV
refs.dat 80 53 References quoted in tables.
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Byte-by-byte Description of file: table1.dat table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Name of PNe
17- 25 A9 --- PK PK number of PNe
27 A1 --- l_He/H [ >] Limit flag on He/H
28- 33 F6.3 --- He/H ? Helium abundances with respect to H
34 A1 --- u_He/H [ :] Uncertainty flag on He/H
37- 42 F6.2 10-4 O/H ? Oxygen abundances with respect to H
43 A1 --- u_O/H [ :] Uncertainty flag on O/H
45 A1 --- l_C/O [ <] Limit flag on N/O
47- 51 F5.2 --- C/O ? Carbon abundances with respect to Oxygen
52 A1 --- u_C/O [ :] Uncertainty flag on C/O
53 A1 --- l_N/O [ <] Limit flag on N/O
55- 59 F5.3 --- N/O ? Nitrogen abundances with respect to Oxygen
60 A1 --- u_N/O [ :] Uncertainty flag on N/O
63- 67 F5.3 --- Ne/O ? Neon abundances with respect to Oxygen
68 A1 --- u_Ne/O [ :] Uncertainty flag on Ne/O
70- 82 A13 --- r6PK ? References in literature.
93- 99 F7.1 pc Z ? Z distance from the Galactic Plane
from Cahn et al. (1992A&AS...94..399C)
100-105 F6.1 km/s V(LSR) ? Radial velocities from Schneider et al.
(1983ApJS...52..399S)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name of PNe
12- 20 A9 --- PK PK number of PNe
26- 30 I5 pc Distance Distance calculated from Cahn et al.
(1992A&AS...94..399C)
38- 43 F6.1 km/s V(LSR) ? Radial velocities Schneider et al.
(1983ApJS...52..399S)
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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2- 3 I2 --- RefNo Reference number
4 A1 --- --- [.]
6- 80 A75 --- Text Text of reference, starting with the
bibcode when existing.
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Acknowledgements: Anna Pasquali <pasquali@arcetri.astro.it>
History:
* 26-Jul-1993: prepared at CDS (Francois Ochsenbein)
* 16-Dec-1999: renumbered the references in the tables; added file "refs.dat"
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(End) Francois Ochsenbein [CDS] 16-Dec-1999