2008A&A...488..731R


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.20CEST21:52:20

2008A&A...488..731R - Astronomy and Astrophysics, volume 488, 731-747 (2008/9-3)

The influence of chemical composition on the properties of Cepheid stars. II. The iron content.

ROMANIELLO M., PRIMAS F., MOTTINI M., PEDICELLI S., LEMASLE B., BONO G., FRANCOIS P., GROENEWEGEN M.A.T. and LANEY C.D.

Abstract (from CDS):

The Cepheid period-luminosity (PL) relation is unquestionably one of the most powerful tools at our disposal for determining the extragalactic distance scale. While significant progress has been made in the past few years towards its understanding and characterization both on the observational and theoretical sides, the debate on the influence that chemical composition may have on the PL relation is still unsettled. With the aim to assess the influence of the stellar iron content on the PL relation in the V and K bands, we have related the V-band and the K-band residuals from the standard PL relations of Freedman et al. (2001ApJ...553...47F) and Persson et al. (2004AJ....128.2239P), respectively, to [Fe/H]. We used direct measurements of the iron abundances of 68 Galactic and Magellanic Cepheids from FEROS and UVES high-resolution and high signal-to-noise spectra. We find a mean iron abundance ([Fe/H]) about solar (σ=0.10) for our Galactic sample (32 stars), ~-0.33dex (σ=0.13) for the Large Magellanic Cloud (LMC) sample (22 stars) and ~-0.75dex (σ=0.08) for the Small Magellanic Cloud (SMC) sample (14 stars). Our abundance measurements of the Magellanic Cepheids double the number of stars studied up to now at high resolution. The metallicity affects the V-band Cepheid PL relation and metal-rich Cepheids appear to be systematically fainter than metal-poor ones. These findings depend neither on the adopted distance scale for Galactic Cepheids nor on the adopted LMC distance modulus. Current data do not allow us to reach a firm conclusion concerning the metallicity dependence of the K-band PL relation. The new Galactic distances indicate a small effect, whereas the old ones support a marginal effect. Recent robust estimates of the LMC distance and current results indicate that the Cepheid PL relation is not Universal.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: distances - stars: variables: Cepheids

Simbad objects: 77

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Number of rows : 77

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SV* HV 817 cC* 00 39 16.5692812473 -72 01 58.302902914   14.44 13.847   13.088 ~ 36 0
2 SV* HV 1365 cC* 00 41 49.0804221683 -73 43 42.179739346   15.672 15.080   14.221 ~ 41 0
3 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11348 1
4 SV* HV 823 cC* 00 43 48.4444591659 -73 36 48.759833880   13.99 13.864   12.790 ~ 40 0
5 OGLE SMC-CEP-921 s*y 00 46 53.1110749320 -72 42 51.737002042   12.67 12.04   11.421 G0Iab 59 0
6 SV* HV 829 cC* 00 50 28.7967644603 -72 45 09.212650923 12.97 12.26 11.63   11.017 G0Ib 78 0
7 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9841 1
8 SV* HV 834 cC* 00 53 42.6455452168 -72 17 13.635274374   12.48 11.89   11.268 F2Ib 62 0
9 SV* HV 837 cC* 00 55 56.0569263828 -71 59 02.692782547   14.16 13.233   12.297 ~ 61 0
10 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 376 0
11 SV* HV 847 cC* 01 01 02.6889668865 -72 11 54.229938936   14.96 13.907   13.035 ~ 35 0
12 SV* HV 1954 cC* 01 04 00.3154946448 -72 13 59.864395541   13.94 14.003   13.254 ~ 34 0
13 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1137 2
14 SV* HV 2064 cC* 01 08 11.5815339725 -72 31 18.348679068   13.89 13.732   12.768 ~ 34 0
15 SV* HV 2195 cC* 01 14 28.0645476624 -72 39 53.532454980   14.02 13.115   12.144 F5Ib 45 0
16 V* BF Tuc cC* 01 17 52.9975933947 -73 37 25.153275568 14.94 14.51 13.72   12.89 F0 33 0
17 V* ST Hyi cC* 01 40 32.2014332345 -74 30 25.593040870   13.49 13.289   12.289 ~ 28 0
18 SV* HV 11211 cC* 02 20 49.4876820936 -73 05 08.320955074   14.88 13.836   13.125 ~ 26 0
19 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5984 1
20 V* SZ Tau cC* 04 37 14.7778803229 +18 32 34.929341041 7.65 7.13 6.37     F6.7:Ib 292 0
21 SV* HV 12452 cC* 04 48 51.3419131055 -69 21 22.760708546   15.53 14.755 14.40 13.941 ~ 28 0
22 SV* HV 5497 cC* 04 55 40.5530432833 -66 25 43.319804465   13.366 11.930 11.38 10.88 G2Ib 72 0
23 SV* HV 877 cC* 04 57 01.7945303401 -67 59 42.590749460   14.10 13.363   12.232 ~ 50 0
24 SV* HV 879 cC* 04 58 05.5960529644 -69 27 15.481012522   14.72 13.356 13.01 12.341 ~ 53 0
25 SV* HV 2260 cC* 05 00 55.8715776572 -68 26 20.816948180   15.67 14.906 14.35 13.933 ~ 39 0
26 SV* HV 2294 cC* 05 06 14.8082811541 -66 40 45.907556411   12.66 12.15 12.44 11.830 F7I 78 0
27 SV* HV 2352 cC* 05 09 04.3685065053 -70 21 54.126571648   14.86 14.197 13.74 13.38 ~ 37 0
28 SV* HV 2337 cC* 05 09 36.9600103264 -68 02 43.661847028   14.96 15.050   14.291 ~ 21 0
29 SV* HV 2369 cC* 05 13 53.6708479354 -67 03 48.447940301 14.7 12.88 12.21   11.648 F5?I? 64 0
30 SV* HV 2405 cC* 05 14 41.5552104934 -70 42 32.084769065   15.88 15.151 14.70 14.355 ~ 28 0
31 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15432 1
32 SV* HV 971 cC* 05 28 15.6250873178 -67 03 58.386000772   14.95 14.48 14.08 13.73 ~ 29 0
33 SV* HV 2580 cC* 05 29 25.6117087087 -66 14 23.294643845   14.82 14.01 13.53 13.14 ~ 41 0
34 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 267 0
35 SV* HV 997 cC* 05 33 00.9900025502 -68 11 27.620434332   15.46 14.591 14.20 13.635 ~ 36 0
36 * bet Dor cC* 05 33 37.5125319201 -62 29 23.323100433 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 354 0
37 SV* HV 2733 cC* 05 37 17.3576284043 -66 45 11.920641743   15.28 14.68 14.30 13.96 ~ 30 0
38 SV* HV 1013 cC* 05 39 53.6438622975 -67 50 08.785719922   14.39 14.21 13.68 12.771 ~ 32 0
39 SV* HV 2793 cC* 05 41 48.5456982985 -68 41 16.103190398   14.66 14.089   13.047 M 34 0
40 SV* HV 2827 cC* 05 43 47.3080229900 -66 35 08.943172884   13.37 12.02   11.220 M 56 0
41 SV* HV 2836 cC* 05 45 09.9518448342 -67 23 09.015477955   15.56 14.63 14.07 13.55 ~ 31 0
42 V* EU Tau cC* 05 45 40.5287885881 +18 39 24.820727851   8.71 8.08     G5 107 0
43 SV* HV 1023 cC* 05 46 36.1850662920 -68 11 03.440243508   14.66 14.06 13.52 12.775 ~ 41 0
44 SV* HV 2864 cC* 05 49 40.1567437668 -67 00 27.816407123   15.00 14.683   13.838 ~ 25 0
45 SV* HV 12700 cC* 05 57 31.5188979522 -67 37 29.437277393   15.68 14.86 14.49 14.11 ~ 31 0
46 SV* HV 6093 cC* 05 57 46.8444050721 -68 41 04.284451547   15.96 15.304 15.02 14.628 ~ 28 0
47 V* T Mon cC* 06 25 12.9997562821 +07 05 08.561189768 8.24 7.20 5.98   4.996 G3Iabv+A0p 451 1
48 * zet Gem cC* 07 04 06.5307903 +20 34 13.073871 5.20 4.58 3.79   3.082 G1Ib 542 0
49 V* X Pup cC* 07 32 47.0329487912 -20 54 34.881653031   9.56 8.46   7.143 K0 167 0
50 V* VZ Pup cC* 07 38 35.2380584126 -28 29 58.597876520   11.469 10.154 9.583   F7.5 134 1
51 V* AP Pup cC* 07 57 45.6728882268 -40 07 24.079693723   8.13 7.37   6.462 F8II 117 0
52 V* AQ Pup cC* 07 58 22.0887170720 -29 07 48.335325928   9.70 8.54   7.175 F5-G2Ib 183 0
53 V* LS Pup cC* 07 58 59.2197671330 -29 18 28.357057956   11.75 10.59 9.88 8.933 ~ 79 0
54 V* BN Pup cC* 08 06 21.4748690781 -30 05 48.768197196   10.99 9.75 8.97 8.981 G4 110 0
55 V* AX Vel cC* 08 10 49.3237950601 -47 41 54.827371638   8.78 8.16     F6II 117 0
56 V* RS Pup cC* 08 13 04.2157137938 -34 34 42.691837063 8.89 8.00 6.70   5.453 F8Iab 326 0
57 V* V Car cC* 08 28 43.6942334868 -60 07 21.267286180   8.14 7.31   6.432 F8Ib/II 130 0
58 V* RZ Vel cC* 08 37 01.3029337589 -44 06 52.844429407   8.507 7.260     G1Ib 204 0
59 V* T Vel cC* 08 37 40.8268486937 -47 21 43.082343785   8.92 7.68   6.970 G0II 155 0
60 V* SW Vel cC* 08 43 38.6904013543 -47 24 11.196771088   9.58 8.32     F8/G0Ib 172 0
61 V* SX Vel cC* 08 44 53.4688984489 -46 20 34.732806621   9.19 8.33   7.264 F8II 122 0
62 V* RY Vel cC* 10 20 41.0317627466 -55 19 17.035924264   9.71 7.86   6.840 F5Ib/II 135 0
63 * L Car * 10 22 58.1460612 -66 54 05.390302 4.35 4.86 4.99     B8V 105 0
64 V* WZ Car cC* 10 55 18.7272542108 -60 56 23.951208594   10.40 9.37     F8 135 0
65 V* U Car cC* 10 57 48.1866898409 -59 43 55.880151632 8.31 7.21 6.11   5.073 G5/8Iab 217 0
66 V* UU Mus cC* 11 52 17.7225421742 -65 24 15.060675590   10.5 9.54     F7/G0p 121 0
67 V* S Mus cC* 12 12 47.0194644681 -70 09 06.436474127 7.58 8.80 8.33 7.39 5.196 F6Ib+B5V 242 0
68 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2185 3
69 V* VW Cen cC* 13 33 59.0299132697 -64 03 19.999430004   11.60 10.36   8.785 ~ 109 0
70 V* KN Cen cC* 13 36 36.8945451169 -64 33 29.916343439   11.22 9.86     G8Iab+B6.0V 129 0
71 V* XX Cen cC* 13 40 18.6446943543 -57 36 47.444003198   8.72 7.30   6.747 F7/8II 175 0
72 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2627 2
73 V* V Cen cC* 14 32 33.0828020969 -56 53 15.774776152 8.44 7.84 6.93   5.798 F5Ib/II 248 0
74 V* GH Lup Ce* 15 24 38.3402443807 -52 51 13.896895820 10.03 9.05 7.83     G2Iab 89 0
75 V* U Nor cC* 15 42 20.9180199642 -55 18 42.941765163   10.68 9.22     F8Ib/II 130 0
76 V* S Nor cC* 16 18 51.8313333962 -57 53 59.253617873 8.15 7.49 6.49   5.427 F8/G0Ib 349 1
77 V* KQ Sco cC* 16 51 38.5473466715 -45 25 36.105341336 12.37 10.69 9.31     K7 122 0

    Equat.    Gal    SGal    Ecl

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2021.06.20-21:52:20

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