V/58 [Fe/H], Vel, Orbits of F2-K5 Dwarfs 80pc from Sun (Marsakov+ 1988)
The Catalogue of Metallicities, Velocity Components and Orbital Parameters for
F2-K5 Dwarfs in the Vicinity of 80 pc from the Sun
Marsakov V.A., Shevelev Yu.G.
=1988BICDS..35..129M 1988BICDS..35..129M
ADC_Keywords: Abundances, [Fe/H] ; Space velocities ; Stars, late-type
Description:
In this catalog, metallicities, distances, components of space
velocities and parameters of osculating orbits are calculated for 1065
F2-K5 dwarfs with UBV photometric data, proper motions and radial
velocities.
The present sample is composed on the base of the Ochsenbein (1980)
catalogue and contains the stars of the V (IV-V) luminosity class,
within the colour range 0.35<B-V<1.10 (which corresponds to the
spectral class range F2-K5).
Sandage's (1969) Hyades sequence was used to determine the value delta
(U-B) for each star. The authors calibrated the ultraviolet excess in
terms of [Fe/H] separately for the four of the temperature index (B-V)
where delta(U-B) practically does not depend on the effective
temperature. Intervals in (B-V) correspond to the following division
on spectral class intervals: F2-F9, G0-G4, and G5-G9, K0-K5.
Metallicity is calculated from the formulae:
[Fe/H]=-5.3*delta(U-B)+0.02 for stars F2-F9
[Fe/H]=-5.1*delta(U-B)+0.13 for stars G0-G4
[Fe/H]=-5.4*delta(U-B)+0.02 for stars G5-G9
[Fe/H]=-4.7*delta(U-B)-0.04 for stars K0-K5
These relations follow from the assumption that mean metallicity and
metallicity dispersion for stars of all spectral classes are the same.
Distances to the stars were calculated from spectral parallaxes.
Absolute magnitudes (M(V)) were obtained from the Sp,M(V)-relation for
dwarfs (Straizys, 1982). The sample includes only stars nearer than 80
pc because reddening is negligible for them. The obtained distances
together with radial velocities and proper motions are used to
calculate the components of space velocities. The eccentricities,
apogalactic and perigalactic distances of the stars were calculated
from the osculating orbit approximation according to the galaxy model
from the paper by Eggen et al. (1962).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
desc.doc 80 78 Author's documentation
catalog.dat 115 1065 Catalog file
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD ?HD number
7 A1 --- m_HD [/] for merge of consecutive HD numbers
8- 13 F6.2 deg GLON Galactic longitude
15- 20 F6.2 deg GLAT Galactic latitude
21- 25 F5.2 mag Vmag Brightness in V filter
28- 33 F6.3 mag B-V B-V color index
35- 40 F6.3 mag U-B U-B color index
41- 54 A14 --- Sp Spectral type
56- 60 F5.1 pc R Heliocentric distance
62- 67 F6.1 km/s Uvel Velocity vector component in the direction
of the anticenter of the Galaxy
69- 74 F6.1 km/s Vvel Velocity component in the direction
of Galactic rotation
76- 81 F6.1 km/s Wvel Velocity component towards the north
Galactic pole
84- 88 F5.1 kpc R1 Apogalactic distance of the Galactic orbit
91- 95 F5.1 kpc R2 Perigalactic distance of the Galactic orbit
98-102 F5.3 --- e Eccentricity of the Galactic orbit
104-109 F6.3 mag E(U-B) Ultraviolet excess
111-115 F5.2 [Sun] [Fe/H] Metallicity index
([Fe/H]=lg(Fe/H)(star)-lg(Fe/H)(sun))
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References:
Eggen O.J., Lynden-Bell D., Sandage A.: 1962, ApJ, 136, 748
Ochsenbein F.: 1980, CDS Inf. Bull., 19, 74 (Cat. V/15)
Sandage A.: 1969, ApJ, 158, 1115.
Straizys V.: 1982, "Metal-Deficient Stars", Vilnius: Mokslas,p.206
(End) James E. Gass [SSDOO/ADC] 09-Sep-1997