2005A&A...429L..37R

Query : 2005A&A...429L..37R

2005A&A...429L..37R - Astronomy and Astrophysics, volume 429, L37-40 (2005/1-2)

The influence of chemical composition on the properties of Cepheid stars. I. Period-Luminosity relation vs. iron abundance.

ROMANIELLO M., PRIMAS F., MOTTINI M., GROENEWEGEN M., BONO G. and FRANCOIS P.

Abstract (from CDS):

We have assessed the influence of the stellar iron content on the Cepheid Period-Luminosity (PL) relation by relating the V band residuals from the Freedman et al. (2001ApJ...553...47F) PL relation to [Fe/H] for 37 Galactic and Magellanic Clouds Cepheids. The iron abundances were measured from FEROS and UVES high-resolution and high-signal to noise optical spectra. Our data indicate that the stars become fainter as metallicity increases, until a plateau or turnover point is reached at about solar metallicity. Our data are incompatible with both no dependence of the PL relation on iron abundance, and with the linearly decreasing behavior often found in the literature (e.g. Kennicutt et al., 1998ApJ...498..181K; Sakai et al., 2004ApJ...608...42S). On the other hand, non-linear theoretical models of Fiorentino et al. (2002ApJ...576..402F) provide a fairly good description of the data.

Abstract Copyright: ∼

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

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 SV* HV 817 cC* 00 39 16.5691333920 -72 01 58.302644988   14.44 13.847   13.088 ~ 37 0
2 SV* HV 1365 cC* 00 41 49.0807785048 -73 43 42.179263032   15.672 15.080   14.221 ~ 43 0
3 SV* HV 823 cC* 00 43 48.4446005400 -73 36 48.759009912   13.99 13.864   12.790 ~ 44 0
4 OGLE SMC-CEP-921 cC* 00 46 53.1109589208 -72 42 51.733779624   12.67 12.04   11.421 G0Iab 63 0
5 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11149 1
6 SV* HV 837 cC* 00 55 56.0568870768 -71 59 02.691309588   14.16 13.233   12.297 ~ 63 0
7 SV* HV 847 cC* 01 01 02.6894208816 -72 11 54.228753168   14.96 13.907   13.035 ~ 38 0
8 SV* HV 1954 cC* 01 04 00.3155585376 -72 13 59.863595916   13.94 14.003   13.254 ~ 35 0
9 SV* HV 2064 cC* 01 08 11.5815677400 -72 31 18.347987676   13.89 13.732   12.768 ~ 37 0
10 SV* HV 2195 cC* 01 14 28.0646245968 -72 39 53.532235548   14.02 13.115   12.144 F5Ib 47 0
11 V* BF Tuc cC* 01 17 52.9977109896 -73 37 25.153110048 14.94 14.51 13.72   12.89 F0 38 0
12 V* ST Hyi cC* 01 40 32.2011876336 -74 30 25.591222656   13.49 13.289   12.289 ~ 31 0
13 SV* HV 11211 cC* 02 20 49.4874864192 -73 05 08.320297344   14.88 13.836   13.125 ~ 28 0
14 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7066 0
15 SV* HV 12452 cC* 04 48 51.3419874096 -69 21 22.760929404   15.53 14.755 14.40 13.941 ~ 34 0
16 SV* HV 2260 cC* 05 00 55.8717251064 -68 26 20.815577988   15.67 14.906 14.35 13.933 ~ 44 0
17 SV* HV 2294 cC* 05 06 14.8080123792 -66 40 45.907786884   12.66 12.15 12.44 11.830 F7I 84 0
18 SV* HV 2352 cC* 05 09 04.3684805616 -70 21 54.126143748   14.86 14.197 13.74 13.38 ~ 40 0
19 SV* HV 2369 cC* 05 13 53.6706712704 -67 03 48.446510436 14.7 12.88 12.21   11.648 F5?I? 69 0
20 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17435 0
21 SV* HV 2580 cC* 05 29 25.6115975616 -66 14 23.293778244   14.82 14.01 13.53 13.14 ~ 45 0
22 SV* HV 997 cC* 05 33 00.9894859776 -68 11 27.619585692   15.46 14.591 14.20 13.635 ~ 39 0
23 * bet Dor cC* 05 33 37.5159729864 -62 29 23.376457680 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 377 0
24 SV* HV 2733 cC* 05 37 17.3553993120 -66 45 11.912453064   15.28 14.68 14.30 13.96 ~ 33 0
25 SV* HV 1013 cC* 05 39 53.6437371816 -67 50 08.784453804   14.39 14.21 13.68 12.771 ~ 36 0
26 SV* HV 1023 cC* 05 46 36.1848254832 -68 11 03.439255668   14.66 14.06 13.52 12.775 ~ 46 0
27 SV* HV 12700 cC* 05 57 31.5186721872 -67 37 29.437481028   15.68 14.86 14.49 14.11 ~ 34 0
28 SV* HV 6093 cC* 05 57 46.8445419408 -68 41 04.285724352   15.96 15.304 15.02 14.628 ~ 30 0
29 V* T Mon cC* 06 25 12.9996760920 +07 05 08.558582892 8.24 7.20 5.98   4.996 G3Iabv+A0p 464 1
30 * zet Gem cC* 07 04 06.5312384690 +20 34 13.074474962 5.20 4.58 3.79   3.082 G1Ib 569 0
31 V* VZ Pup cC* 07 38 35.2380326136 -28 29 58.597431036   11.469 10.154 9.583   F7.5 148 1
32 V* AQ Pup cC* 07 58 22.0887499032 -29 07 48.338631084   9.70 8.54   7.175 F5-G2Ib 198 0
33 V* RS Pup cC* 08 13 04.2157111224 -34 34 42.696447852 8.89 8.51 7.04   5.453 F8Iab 347 0
34 V* RZ Vel cC* 08 37 01.3028699904 -44 06 52.846248456   8.507 7.260     G1Ib 224 0
35 * l Car cC* 09 45 14.8117044917 -62 30 28.450312664   5.09 3.75     G5Iab/b 318 0
36 V* VW Cen cC* 13 33 59.0300715216 -64 03 19.999348524   11.60 10.36   8.785 ~ 125 0
37 V* KN Cen cC* 13 36 36.8950655064 -64 33 29.914949592   11.22 9.86     G8Iab+B6.0V 143 0
38 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2914 2
39 V* V Cen cC* 14 32 33.0833481288 -56 53 15.774129600 8.44 7.84 6.93   5.798 F5Ib/II 274 0
40 V* U Nor cC* 15 42 20.9185773096 -55 18 42.939346104   10.68 9.22     F8Ib/II 146 0
41 V* S Nor cC* 16 18 51.8316855000 -57 53 59.256000852 8.15 7.49 6.49   5.427 F8/G0Ib 374 1
42 V* KQ Sco cC* 16 51 38.5473559392 -45 25 36.101286516 12.37 10.69 9.31     K7 135 0
43 V* WZ Sgr cC* 18 16 59.7160721616 -19 04 32.989734840   9.10 7.45     F7(III) 252 0
44 V* SZ Aql cC* 19 04 39.4158230832 +01 18 22.158826524   9.92 7.92   7.039 F8/G0Ib 193 0

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