CDROM/AJ/V113/P1073 Abundances in Cepheid Variables (Fry & Carney 1997) ================================================================================ Chemical Abundances of Galactic Cepheid Variables That Calibrate the P-L Relation A. M. Fry and B. W. Carney <1997, AJ, 113, 1073> =1997AJ....113.1073F ================================================================================ 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 0.4 dex 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 0.2 dex 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: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table2a.dat 88 137 U Sgr Equivalent Widths table2b.dat 42 104 M 25 dwarfs', Pleiades dwarfs', and V42 Equivalent Widths table2c.dat 70 62 Eta Aql Equivalent Widths table2d.dat 49 57 RX Aur Equivalent Widths table2e.dat 56 103 CF Cas, V Cen, CV Mon, and QZ Nor Equivalent Widths table2f.dat 35 88 DL Cas, TW Nor, and EV Sct Equivalent Widths table2g.dat 56 72 Del Cep Equivalent Widths table2h.dat 42 54 X Cyg Equivalent Widths table2i.dat 42 59 Zet Gem Equivalent Widths table2j.dat 56 54 T Mon Equivalent Widths table2k.dat 56 100 S Nor, V340 Nor, W Sgr, WZ Sgr, and SW Vel Equivalent Widths table2l.dat 56 66 S Sge Equivalent Widths table2m.dat 49 64 SZ Tau Equivalent Widths table2n.dat 63 65 T Vul Equivalent Widths table2o.dat 63 60 SV Vul Equivalent Widths table3.dat 200 37 Equivalent Widths of Alpha-Peak Elements table2.tex 104 1296 AASTeX version of table2a.dat-table2o.dat table3.tex 80 223 AASTeX version of table3a.dat-table3d.dat -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2a.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8 1X --- --- Blank 9-13 A5 --- Ion 'Fe I' or 'Fe II' 14-19 F6.3 --- gf log gf value 20-25 F6.2 --- Chi Chi value 26-32 F7.2 --- EW_106 []? Equivalent width, phi=0.106 33-39 F7.2 --- EW_128 []? Equivalent width, phi=0.128 40-46 F7.2 --- EW_151 []? Equivalent width, phi=0.151 47-53 F7.2 --- EW_254 []? Equivalent width, phi=0.254 54-60 F7.2 --- EW_404 []? Equivalent width, phi=0.404 61-67 F7.2 --- EW_447 []? Equivalent width, phi=0.447 68-74 F7.2 --- EW_699 []? Equivalent width, phi=0.699 75-81 F7.2 --- EW_811 []? Equivalent width, phi=0.811 82-88 F7.2 --- EW_952 []? Equivalent width, phi=0.952 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2b.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_M25_3 []? Equivalent width, M25 III-2-18 15-21 F7.1 --- EW_M25_4 []? Equivalent width, M25 IV-2-34 22-28 F7.1 --- EW_158 []? Equivalent width, HII 158 29-35 F7.1 --- EW_1362 []? Equivalent width, HII 1362 36-42 F7.1 --- EW_V42 []? Equivalent width, V42 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2c.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_537 []? Equivalent width, phi=0.537 15-21 F7.1 --- EW_675 []? Equivalent width, phi=0.675 22-28 F7.1 --- EW_814 []? Equivalent width, phi=0.814 29-35 F7.1 --- EW_955 []? Equivalent width, phi=0.955 36-42 F7.1 --- EW_093 []? Equivalent width, phi=0.093 43-49 F7.1 --- EW_232 []? Equivalent width, phi=0.232 50-56 F7.1 --- EW_370 []? Equivalent width, phi=0.370 57-63 F7.1 --- EW_399 []? Equivalent width, phi=0.399 64-70 F7.1 --- EW_722 []? Equivalent width, phi=0.722 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2d.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_217 []? Equivalent width, phi=0.217 15-21 F7.1 --- EW_304 []? Equivalent width, phi=0.304 22-28 F7.1 --- EW_483 []? Equivalent width, phi=0.483 29-35 F7.1 --- EW_568 []? Equivalent width, phi=0.568 36-42 F7.1 --- EW_648 []? Equivalent width, phi=0.648 43-49 F7.1 --- EW_732 []? Equivalent width, phi=0.732 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2e.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_655 []? Equivalent width, phi=0.655, CF Cas 15-21 F7.1 --- EW_260 []? Equivalent width, phi=0.260, CF Cas 22-28 F7.1 --- EW_236 []? Equivalent width, phi=0.236, V Cen 29-35 F7.1 --- EW_500 []? Equivalent width, phi=0.500, V Cen 36-42 F7.1 --- EW_178 []? Equivalent width, phi=0.178, CV Mon 43-49 F7.1 --- EW_363 []? Equivalent width, phi=0.363, CV Mon 50-56 F7.1 --- EW_201 []? Equivalent width, phi=0.201, QZ Nor -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2f.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_140 []? Equivalent width, phi=0.140, DL Cas 15-21 F7.1 --- EW_389 []? Equivalent width, phi=0.389, DL Cas 22-28 F7.1 --- EW_227 []? Equivalent width, phi=0.227, TW Nor 29-35 F7.1 --- EW_695 []? Equivalent width, phi=0.695, EV Sct -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2g.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_399 []? Equivalent width, phi=0.399 15-21 F7.1 --- EW_584 []? Equivalent width, phi=0.584 22-28 F7.1 --- EW_765 []? Equivalent width, phi=0.765 29-35 F7.1 --- EW_959 []? Equivalent width, phi=0.959 36-42 F7.1 --- EW_146 []? Equivalent width, phi=0.146 43-49 F7.1 --- EW_320 []? Equivalent width, phi=0.320 50-56 F7.1 --- EW_507 []? Equivalent width, phi=0.507 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2h.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_371 []? Equivalent width, phi=0.371 15-21 F7.1 --- EW_432 []? Equivalent width, phi=0.432 22-28 F7.1 --- EW_553 []? Equivalent width, phi=0.553 29-35 F7.1 --- EW_615 []? Equivalent width, phi=0.615 36-42 F7.1 --- EW_674 []? Equivalent width, phi=0.674 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2i.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_410 []? Equivalent width, phi=0.410 15-21 F7.1 --- EW_507 []? Equivalent width, phi=0.507 22-28 F7.1 --- EW_707 []? Equivalent width, phi=0.707 29-35 F7.1 --- EW_806 []? Equivalent width, phi=0.806 36-42 F7.1 --- EW_903 []? Equivalent width, phi=0.903 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2j.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_387 []? Equivalent width, phi=0.387 15-21 F7.1 --- EW_423 []? Equivalent width, phi=0.423 22-28 F7.1 --- EW_461 []? Equivalent width, phi=0.461 29-35 F7.1 --- EW_499 []? Equivalent width, phi=0.499 36-42 F7.1 --- EW_536 []? Equivalent width, phi=0.536 43-49 F7.1 --- EW_572 []? Equivalent width, phi=0.572 50-56 F7.1 --- EW_470 []? Equivalent width, phi=0.470 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2k.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_550 []? Equivalent width, phi=0.550, S Nor 15-21 F7.1 --- EW_570 []? Equivalent width, phi=0.570, S Nor 22-28 F7.1 --- EW_193 []? Equivalent width, phi=0.193, V340 Nor 29-35 F7.1 --- EW_032 []? Equivalent width, phi=0.032, W Sgr 36-42 F7.1 --- EW_950 []? Equivalent width, phi=0.950, WZ Sgr 43-49 F7.1 --- EW_343 []? Equivalent width, phi=0.343, WZ Sgr 50-56 F7.1 --- EW_348 []? Equivalent width, phi=0.348, SW Vel -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2l.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_226 []? Equivalent width, phi=0.226 15-21 F7.1 --- EW_345 []? Equivalent width, phi=0.345 22-28 F7.1 --- EW_463 []? Equivalent width, phi=0.463 29-35 F7.1 --- EW_582 []? Equivalent width, phi=0.582 36-42 F7.1 --- EW_703 []? Equivalent width, phi=0.703 43-49 F7.1 --- EW_820 []? Equivalent width, phi=0.820 50-56 F7.1 --- EW_940 []? Equivalent width, phi=0.940 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2m.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_017 []? Equivalent width, phi=0.017 15-21 F7.1 --- EW_333 []? Equivalent width, phi=0.333 22-28 F7.1 --- EW_647 []? Equivalent width, phi=0.647 29-35 F7.1 --- EW_978 []? Equivalent width, phi=0.978 36-42 F7.1 --- EW_291 []? Equivalent width, phi=0.291 43-49 F7.1 --- EW_603 []? Equivalent width, phi=0.603 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2n.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_011 []? Equivalent width, phi=0.011 15-21 F7.1 --- EW_237 []? Equivalent width, phi=0.237 22-28 F7.1 --- EW_456 []? Equivalent width, phi=0.456 29-35 F7.1 --- EW_684 []? Equivalent width, phi=0.684 36-42 F7.1 --- EW_911 []? Equivalent width, phi=0.911 43-49 F7.1 --- EW_128 []? Equivalent width, phi=0.128 50-56 F7.1 --- EW_089 []? Equivalent width, phi=0.089 57-63 F7.1 --- EW_539 []? Equivalent width, phi=0.539 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2o.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8-14 F7.1 --- EW_260 []? Equivalent width, phi=0.260 15-21 F7.1 --- EW_283 []? Equivalent width, phi=0.283 22-28 F7.1 --- EW_305 []? Equivalent width, phi=0.305 29-35 F7.1 --- EW_327 []? Equivalent width, phi=0.327 36-42 F7.1 --- EW_350 []? Equivalent width, phi=0.350 43-49 F7.1 --- EW_371 []? Equivalent width, phi=0.371 50-56 F7.1 --- EW_690 []? Equivalent width, phi=0.690 57-63 F7.1 --- EW_737 []? Equivalent width, phi=0.737 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.2 0.1nm Lambda Line wavelength 8 1X --- --- Blank 9-13 A5 --- Ion 'Si I', 'Ca I', 'Ti I', or 'Ti II' 14-20 F7.3 --- gf log gf value 21-26 F6.2 --- Chi Chi value 27-32 F6.1 --- EW_721 []? Equivalent width, phi=0.721, Eta Aql 33-38 F6.1 --- EW_304 []? Equivalent width, phi=0.304, RX Aur 39-44 F6.1 --- EW_655 []? Equivalent width, phi=0.655, CF Cas 45-50 F6.1 --- EW_260 []? Equivalent width, phi=0.260, CF Cas 51-56 F6.1 --- EW_140 []? Equivalent width, phi=0.140, DL Cas 57-62 F6.1 --- EW_389 []? Equivalent width, phi=0.389, DL Cas 63-68 F6.1 --- EW_178 []? Equivalent width, phi=0.178, V Cen 69-74 F6.1 --- EW_285 []? Equivalent width, phi=0.285, V Cen 75-80 F6.1 --- EW_399 []? Equivalent width, phi=0.399, Del Cep 81-86 F6.1 --- EW_432 []? Equivalent width, phi=0.432, X Cyg 87-92 F6.1 --- EW_410 []? Equivalent width, phi=0.410, Zet Gem 93-68 F6.1 --- EW_470 []? Equivalent width, phi=0.470, T Mon 99-104 F6.1 --- EW_363 []? Equivalent width, phi=0.363, CV Mon 105-110 F6.1 --- EW_550 []? Equivalent width, phi=0.550, S Nor 111-116 F6.1 --- EW_570 []? Equivalent width, phi=0.570, S Nor 117-122 F6.1 --- EW_201 []? Equivalent width, phi=0.201, QZ Nor 123-128 F6.1 --- EW_227 []? Equivalent width, phi=0.227, TW Nor 129-134 F6.1 --- EW_193 []? Equivalent width, phi=0.193, V340 Nor 135-140 F6.1 --- EW_695 []? Equivalent width, phi=0.695, EV Sct 141-146 F6.1 --- EW_463 []? Equivalent width, phi=0.463, S Sge 147-152 F6.1 --- EW_152 []? Equivalent width, phi=0.152, U Sgr 153-158 F6.1 --- EW_447 []? Equivalent width, phi=0.447, U Sgr 159-164 F6.1 --- EW_031 []? Equivalent width, phi=0.031, W Sgr 165-170 F6.1 --- EW_347a []? Equivalent width, phi=0.347, WZ Sgr 171-176 F6.1 --- EW_333 []? Equivalent width, phi=0.333, SZ Tau 177-182 F6.1 --- EW_347b []? Equivalent width, phi=0.347, SW Vel 183-188 F6.1 --- EW_089 []? Equivalent width, phi=0.089, T Vul 189-194 F6.1 --- EW_539 []? Equivalent width, phi=0.539, T Vul 195-200 F6.1 --- EW_283 []? Equivalent width, phi=0.283, SV Vul -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 10-Apr-1997