1994A&AS..108..433A

Query : 1994A&AS..108..433A

1994A&AS..108..433A - Astron. Astrophys., Suppl. Ser., 108, 433-440 (1994/December-1)

Chemical composition of selected double-mode Cepheids and the P1/P0 - [Fe/H] relation.

ANDRIEVSKY S.M., KOVTYUKH V.V., USENKO I.A., KLOCHKOVA V.G. and GALAZUTDINOV G.A.

Abstract (from CDS):

We present the results of the detailed spectroscopic investigation of three double-mode Cepheids: EW Sct, VX Pup and BQ Ser. The abundance analysis has shown: (1) Carbon is deficient (the abundance normalized to the iron content with respect to the solar value). (2) This carbon deficiency is accompanied by nitrogen overabundance and normal oxygen content. (3) α - and iron group elements with little exception show solar ratio [M/Fe]. (4) The heavy elements in EW Sct are underabundant. (5) Normal iron abundance for EW Sct ([Fe/H]=-0.08) and metal deficiency for VX Pup ([Fe/H]=-0.39) and BQ Ser ([Fe/H]=-0.36) strongly support the existence of a P1/P0-metallicity relation, as first discussed in work of Andrievsky et al. (1993).

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - stars: variables: Cepheids - stars: individual: EW Sct, VX Pup, BQ Ser

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* TU Cas cC* 00 26 19.4488112352 +51 16 49.292204088   8.507 7.835     F4 212 0
2 * mu. Per SB* 04 14 53.8635146524 +48 24 33.590334394 5.75 5.12 4.16 3.38 2.83 G0Ib 252 0
3 V* VX Pup cC* 07 32 36.6489773592 -21 55 49.534161528   9.87 9.32 8.97   F3IV 147 0
4 V* AX Vel cC* 08 10 49.3236457224 -47 41 54.828934332   8.78 8.16     F6II 127 0
5 V* AP Vel cC* 08 39 45.7557936912 -43 51 39.163001040   11.17 10.16     F9 106 0
6 V* GZ Car cC* 10 20 20.3716366488 -59 22 35.834822616   11.15 10.20     G5 102 0
7 V* Y Car cC* 10 33 10.8500390952 -58 29 55.095062136   8.75 8.16     F0/3 152 0
8 V* UZ Cen cC* 11 40 58.5379283208 -62 41 32.933904396   9.60 8.30   7.909 F3Ib/II 130 0
9 V* BK Cen cC* 11 49 16.0153669440 -63 04 42.905812404   11.04 10.19     G5 105 0
10 V* U TrA cC* 16 07 19.0044671808 -62 54 38.018675304   8.43 7.89     F8Ib/II 149 0
11 NGC 6649 OpC 18 33 26.2 -10 23 54   10.35 8.9     ~ 154 0
12 V* V367 Sct cC* 18 33 35.2353033192 -10 25 38.126250552   13.34 11.580     F7Ib 187 0
13 V* BQ Ser cC* 18 36 15.9375844368 +04 23 53.693400840   10.49 9.21     F5III 114 0
14 V* EW Sct cC* 18 37 51.1112159832 -06 47 48.494842332   9.50 7.96     F8Ib/II 117 0

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