J/A+A/521/A40 Stroemgren photometry of Milky Way stars (Arnadottir+, 2010)
The ability of intermediate-band Stroemgren photometry to correctly identify
dwarf, subgiant, and giant stars and provide stellar metallicities and surface
gravities
Arnadottir A.S., Feltzing S., Lundstroem I.
<Astron. Astrophys. 521, A40 (2010)>
=2010A&A...521A..40A 2010A&A...521A..40A
ADC_Keywords: Stars, nearby ; Photometry, uvby ; Abundances, [Fe/H]
Keywords: stars: abundances - stars: fundamental parameters -
solar neighborhood - Galaxy: stellar content
Abstract:
Several large scale photometric and spectroscopic surveys are being
undertaken to provide a more detailed picture of the Milky Way. Given
the necessity of generalisation in the determination of, e.g., stellar
parameters when tens and hundred of thousands of stars are considered
it remains important to provide independent, detailed studies to
verify the methods used in the surveys.
Description:
We evaluate available metallicity calibrations based on Stroemgren
uvby photometry for dwarf stars using a catalogue of stars with both
uvby photometry and spectroscopically determined iron abundances
([Fe/H]). The catalogue was created for this project. Using this
catalogue, we also evaluate available calibrations that determine
logg. A larger catalogue, in which metallicity is determined directly
from uvby photometry, is used to trace metallicity-dependent standard
sequences for dwarf stars. We also perform comparisons, for both dwarf
and giant stars, of metallicities derived from ugriz photometry with
metallicities derived from Stroemgren photometry.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 114 459 Dwarf stars with both Stroemgren photometry and
[Fe/H] based on high resolution, high S/N
spectroscopy
refs.dat 66 19 References
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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- 6 I6 --- HIP ? HIP number
8- 18 A11 --- Name Other name
20- 23 A4 --- r_b-y Reference for uvby data, in refs.dat file
25- 30 F6.3 mag Vmag V magnitude
32- 36 F5.3 mag b-y Stroemgren b-y colour index
38- 42 F5.3 mag m1 Stroemgren m1 index
44- 49 F6.3 mag c1 Stroemgren c1 index
51 A1 --- l_E(B-V) Limit flag on E(B-V)
52- 56 F5.3 mag E(B-V) Color excess
58- 63 F6.3 mag V0mag Dereddened V magnitude
65- 69 F5.3 mag (b-y)0 Dereddened b-y colour index
71- 75 F5.3 mag m1.0 Dereddened m1 index
77- 82 F6.3 mag c1.0 Dereddened c1 index
84- 88 F5.2 [Sun] [Fe/H] Average metallicity
90- 93 F4.2 [Sun] range ?=- Full range (±) of [Fe/H] if the star was
found in more than one study
95 I1 --- Nref Number of references for [Fe/H]
97-114 A18 --- r_[Fe/H] References for [Fe/H], in refs.dat file
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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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1- 4 A4 --- Ref Reference code
6- 24 A19 --- BibCode BibCode
26- 46 A21 --- Aut Author's name
48- 66 A19 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Oct-2010