2019MNRAS.488.3211K

Query : 2019MNRAS.488.3211K

2019MNRAS.488.3211K - Mon. Not. R. Astron. Soc., 488, 3211-3221 (2019/September-3)

The MAGIC project - II. Discovery of two new Galactic lithium-rich Cepheids.

KOVTYUKH V., LEMASLE B., KNIAZEV A., BERDNIKOV L., BONO G., USENKO I., GREBEL E.K., HAJDU G. and PASTUKHOVA E.

Abstract (from CDS):

We report the discovery of two new lithium-rich Cepheids in the Milky Way (A(Li) ≃ 2.9 dex) among the targets of the MAGIC spectroscopic survey with the Southern African Large Telescope spectrographs. The 6707 Å Li feature is usually not detectable in the atmosphere of Cepheids. Only three Cepheids (two in the Milky Way and one in the Large Magellanic Cloud) had been reported so far with high lithium abundances. We examine the possibility that the Li-rich Cepheids are evolving towards the red giant branch, crossing the instability strip for the first time, as well as other possible scenarios. The two stars are mixed-mode Cepheids pulsating simultaneously in the first and in the second overtone modes. We briefly discuss the possible connection between their unusual chemical composition and their pulsational properties.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

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

VizieR on-line data: <Available at CDS (J/MNRAS/488/3211): table1.dat table2.dat table4.dat table6.dat>

Simbad objects: 27

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Number of rows : 27
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* V825 Cas cC* 00 25 18.1692599640 +60 45 53.202776472   14.1       ~ 13 0
2 V* V383 Cas LP? 00 43 43.5004229472 +62 00 08.642990808           ~ 9 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 V* V371 Per cC* 02 55 31.1849232456 +42 35 19.729034664   11.52 10.95     ~ 25 0
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
6 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
7 SV* HV 5497 cC* 04 55 40.5527820192 -66 25 43.318661664     11.930 11.38 10.88 G2Ib 89 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
9 V* V901 Mon cC* 06 27 25.2521395704 +01 11 32.418314772   11.32 10.52     G0 11 1
10 NGC 2243 OpC 06 29 34.3 -31 16 58   10.12 9.4     ~ 298 0
11 V* DZ CMa cC* 07 16 59.3295055464 -15 18 25.436915604     11.960 11.61 10.71 G0 30 0
12 V* BE Pup cC* 07 33 35.5028274936 -25 50 37.228061724     13.675   12.362 ~ 34 0
13 ASAS J075842-2536.1 cC* 07 58 42.1652227470 -25 36 00.940565406   12.888 12.239 12.192 11.553 ~ 12 0
14 * l Car cC* 09 45 14.8117044917 -62 30 28.450312664   5.09 3.75     G5Iab/b 343 0
15 V* V701 Car cC* 10 09 13.6141771968 -57 14 33.360686628   12.39 11.10 10.64   ~ 23 0
16 V* EY Car cC* 10 42 23.0317207392 -61 09 57.295281744   11.05 10.35     ~ 83 0
17 V* AS Cen EB* 11 13 05.7847606359 -57 07 41.795860066           ~ 6 0
18 V* V1048 Cen cC* 11 28 42.6634698048 -59 25 43.337724744   11.09 10.50   9.57 F8 34 0
19 V* V356 Mus cC* 13 17 13.7705158896 -66 04 59.486705868   11.6 11.50 11.59 11.05 ~ 13 0
20 V* V1210 Cen cC* 14 36 55.5558787272 -58 15 41.219542908   11.29 10.27     ~ 27 0
21 V* V767 Sgr cC* 17 52 28.4108897568 -26 42 12.493247868     12.54   10.748 ~ 15 0
22 V* V458 Sct cC* 18 22 27.0663763008 -10 07 29.181954072   10.74 9.81     ~ 33 0
23 V* EW Sct cC* 18 37 51.1112159832 -06 47 48.494842332   9.50 7.96     F8Ib/II 117 0
24 HD 172365 RG* 18 39 36.8773335936 +05 15 51.448369824 6.92 7.15 6.40     F8II 136 0
25 HD 174104 RG* 18 47 44.1608642616 +28 43 12.505843956   9.06 8.37     G0Ib 38 0
26 V* SV Vul cC* 19 51 30.9059845128 +27 27 36.837672012 8.65 9.00 6.74   5.703 F8Ia 460 0
27 V* V1033 Cyg cC* 20 05 20.6650542528 +32 39 32.806824120     12.60 12.59   ~ 50 0

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