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J/AJ/113/1073             Abundances in Cepheid Variables (Fry+  1997)
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Chemical Abundances of Galactic Cepheid Variables That Calibrate
the P-L Relation
     Fry A.M., Carney B.W.
    <Astron. J. 113, 1073 (1997)>
    =1997AJ....113.1073F
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ADC_Keywords: Stars, variable ; Equivalent widths

Abstract:
    We have completed spectroscopic studies of 23 Galactic cepheids to
    determine possible metallicity effects on measuring the zero point of
    the P-L relation. We find a spread of 0.4dex in [Fe/H], which is not
    the result of either observational scatter or of a metallicity
    gradient within the Galactic disk. We find a smaller, less significant
    spread of 0.2dex in [{alpha}/Fe]. Our results are robust, determined by
    constancy of [Fe/H] derived at differing temperatures throughout the
    pulsational cycle, and abundances of two dwarfs compared to U Sgr in
    the cluster M25. We discuss briefly the effect of metallicity on the
    P-L relation. We also argue that EV Sct and QZ Nor are overtone
    pulsators, and that the latter is not a member of the cluster
    NGC 6067.
    (Copyright) 1997 American Astronomical Society.

File Summary:
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  FileName        Lrecl  Records   Explanations
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ReadMe             80        .   This file
table2             53     7719   Equivalent widths of Fe I and Fe II
table3             53     1073   Equivalent widths of Alpha-peak elements
table2.tex        104     1296   AASTeX version of Tables 2a to 2o
table3.tex         80      223   AASTeX version of Tables 3a to 3d
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Byte-by-byte Description of file: table2 table3
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   Bytes Format Units   Label     Explanations
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   1- 12  A12   ---     Name      Star name
  14- 18  F5.3  ---     phi       [0/1[? Phase
  20- 26  F7.2  0.1nm   lambda    Line wavelength
  28- 34  F7.2  0.1pm   EW        ? Equivalent width
  36- 40  A5    ---     Ion       Ion designation
  42- 47  F6.3  ---     log(gf)   ? log of oscillator strength
  50- 53  F4.2  eV      Chi       ? Chi value
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Origin :AAS CD-ROM series, Volume 8, 1997         Lee Brotzman [ADS] 10-Apr-1997
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(End)                                          Patricia Bauer [CDS]  04-Jul-1997