2016MNRAS.460.2077K

Query : 2016MNRAS.460.2077K

2016MNRAS.460.2077K - Mon. Not. R. Astron. Soc., 460, 2077-2086 (2016/August-1)

The chemical composition of Galactic beat Cepheids.

KOVTYUKH V., LEMASLE B., CHEKHONADSKIKH F., BONO G., MATSUNAGA N., YUSHCHENKO A., ANDERSON R.I., BELIK S., DA SILVA R. and INNO L.

Abstract (from CDS):

We determine the metallicity and detailed chemical abundances (α, iron-peak and neutron-capture elements) for the almost complete (18/24) sample of Galactic double mode Cepheids (also called beat Cepheids). Double mode Cepheids are Cepheids that pulsate in two modes simultaneously. We calibrate a new relation between their metallicity and their period ratio P1/P0. This linear relation allows to determine the metallicity of bimodal Cepheids with an accuracy of 0.03 dex in the range of [Fe/H] from +0.2 to -0.5 dex. By extrapolating the relation to Magellanic Clouds beat Cepheids, we provide their metallicity distribution function. Moreover, by using this relation, we also provide the first metallicity estimate for two double-mode F/1O Cepheids located in and beyond the Galactic bulge. Finally, we report the discovery of a super-Lithium rich double mode Cepheid V371 Per which has a Lithium abundance of logA(Li)=3.54±0.09 dex. Along with V1033 Cyg (which is an ordinary classical Cepheid), it is the second known Cepheid of such type in the Galaxy.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: individual: V371 Per - stars: variables: Cepheids - stars: variables: Cepheids

Simbad objects: 40

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Number of rows : 40
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 V* AS Cas cC* 00 25 37.7350953840 +64 13 47.619419592     12.23     ~ 51 0
2 V* TU Cas cC* 00 26 19.4488112352 +51 16 49.292204088   8.507 7.835     F4 203 0
3 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12645 1
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11146 1
5 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
6 V* BY Cas cC* 01 47 11.9194002672 +61 25 20.954139708   11.5 10.369     F5 127 0
7 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 673 2
8 V* V371 Per cC* 02 55 31.1849232456 +42 35 19.729034664   11.52 10.95     ~ 22 0
9 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7065 0
10 SV* HV 5497 cC* 04 55 40.5527820192 -66 25 43.318661664   13.366 11.930 11.38 10.88 G2Ib 79 0
11 OGLE LMC-CEP-571 cC* 04 59 17.4685177608 -69 14 18.092573736     15.702   14.858 ~ 14 0
12 V* YZ Aur cC* 05 15 21.9827588256 +40 04 40.880491572   11.77 10.24     G5 108 0
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17431 0
14 V* DX Gem cC* 06 33 54.6098400624 +14 28 17.010131736   11.24 10.73     ~ 100 0
15 V* VX Pup cC* 07 32 36.6489773592 -21 55 49.534161528   9.87 9.32 8.97   F3IV 138 0
16 V* AX Vel cC* 08 10 49.3236457224 -47 41 54.828934332   8.78 8.16     F6II 121 0
17 V* AP Vel cC* 08 39 45.7557936912 -43 51 39.163001040   11.17 10.16     F9 100 0
18 * l Car cC* 09 45 14.8117044917 -62 30 28.450312664   5.09 3.75     G5Iab/b 318 0
19 V* V701 Car cC* 10 09 13.6141771968 -57 14 33.360686628   12.39 11.10 10.64   ~ 18 0
20 V* GZ Car cC* 10 20 20.3716366488 -59 22 35.834822616   11.15 10.20     G5 97 0
21 V* Y Car cC* 10 33 10.8500390952 -58 29 55.095062136   8.75 8.16     F0/3 143 0
22 V* EY Car cC* 10 42 23.0317207392 -61 09 57.295281744   11.05 10.35     ~ 78 0
23 V* UZ Cen cC* 11 40 58.5379283208 -62 41 32.933904396   9.60 8.30   7.909 F3Ib/II 124 0
24 V* BK Cen cC* 11 49 16.0153669440 -63 04 42.905812404   11.04 10.19     G5 100 0
25 V* W Vir WV* 13 26 01.9928807928 -03 22 43.431062880   10.33 9.46 9.29 9.393 F2Ibe 300 0
26 V* V1210 Cen cC* 14 36 55.5558787272 -58 15 41.219542908   11.29 10.27     ~ 20 0
27 V* U TrA cC* 16 07 19.0044671808 -62 54 38.018675304   8.43 7.89     F8Ib/II 143 0
28 OGLE BLG-CEP-3 cC* 17 44 43.7940418728 -23 43 25.208360940     18.207   16.390 ~ 11 0
29 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14412 0
30 OGLE BLG-CEP-21 cC* 17 57 50.3681406360 -28 04 43.301673912     19.448   16.841 ~ 8 0
31 V* V458 Sct cC* 18 22 27.0663763008 -10 07 29.181954072   10.74 9.81     ~ 27 0
32 V* V367 Sct cC* 18 33 35.2353033192 -10 25 38.126250552   13.34 11.580     F7Ib 175 0
33 V* BQ Ser cC* 18 36 15.9375844368 +04 23 53.693400840   10.49 9.21     F5III 108 0
34 V* EW Sct cC* 18 37 51.1112159832 -06 47 48.494842332   9.50 7.96     F8Ib/II 110 0
35 HD 172365 * 18 39 36.8773335936 +05 15 51.448369824 6.92 7.15 6.40     F8II 129 0
36 HD 174104 * 18 47 44.1608642616 +28 43 12.505843956   9.06 8.37     G0Ib 34 0
37 HD 344787 cC* 19 43 29.3862278448 +23 10 40.634309964   10.33 9.32     K0 33 0
38 V* SV Vul cC* 19 51 30.9059845128 +27 27 36.837672012 8.65 9.00 6.74   5.703 F8Ia 433 0
39 V* V1033 Cyg cC* 20 05 20.6650542528 +32 39 32.806824120     12.60 12.59   ~ 44 0
40 NAME Galactic Bulge reg ~ ~           ~ 4299 0

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