2016A&A...587A..66D

Query : 2016A&A...587A..66D

2016A&A...587A..66D - Astronomy and Astrophysics, volume 587A, 66-66 (2016/3-1)

Searching for Li-rich giants in a sample of 12 open clusters. Li enhancement in two stars with substellar companions.

DELGADO MENA E., TSANTAKI M., SOUSA S.G., KUNITOMO M., ADIBEKYAN V., ZAWORSKA P., SANTOS N.C., ISRAELIAN G. and LOVIS C.

Abstract (from CDS):

The aim of this work is to search for Li-rich giants in a sample of clusters where planets have been searched, thus we can study the planet engulfment scenario to explain Li replenishment using a proper comparison sample of stars without detected giant planets. We derived Li abundances for a sample of 67 red giant stars in 12 different open clusters using standard spectral synthesis techniques and high-resolution spectra (from HARPS and UVES). We also determined masses, ages, and radius from PARSEC stellar isochrones to constrain the evolutionary stage of these stars. We found three stars in different clusters with clearly enhanced Li abundances compared to other stars within the cluster. Interestingly, the only two stars with a detected substellar companion in our sample belong to that group. One of the planet hosts, NGC2423 No. 3, might lie close to the luminosity bump on the HR diagram, a phase where Li production by the Cameron-Fowler process is supported by extra-mixing to bring fresh Li up to the surface. On the other hand, NGC4349 No. 127 is a more massive and more evolved giant that does not seem to be in the evolutionary phase where other Li-rich stars are found. We discuss the possibility that the Li enhancement of this star is triggered by the engulfment of a planet, considering that close-in planets hardly survive the RGB tip and the early AGB phases.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - planetary systems - stars: rotation - stars: evolution - planets and satellites: physical evolution

Simbad objects: 78

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Number of rows : 78
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 NGC 2360 79 * 07 17 16.9115868720 -15 38 40.674989832 12.99 12.31 11.29     ~ 19 0
2 NGC 2360 66 * 07 17 19.4552800224 -15 34 23.866112208 12.74 12.20 11.27     ~ 16 0
3 NGC 2360 85 * 07 17 32.5642208448 -15 38 59.398671876 13.11 12.44 11.44     ~ 22 0
4 HIP 35305 * 07 17 35.0707479696 -15 38 35.435230116 12.48 11.80 10.77     ~ 36 0
5 NGC 2360 89 * 07 17 35.6412571344 -15 37 30.713621844 12.74 12.05 11.05     ~ 15 0
6 TYC 5965-749-1 * 07 17 43.0357213800 -15 37 32.158140672 12.83 12.10 11.09     ~ 26 0
7 NGC 2360 OpC 07 17 46.3 -15 37 52           ~ 194 0
8 NGC 2360 119 * 07 17 48.6966127464 -15 39 41.150946636 12.83 12.07 11.03     ~ 20 0
9 HIP 35366 * 07 18 19.0082143896 -15 34 59.423559132 12.79 12.10 11.10     ~ 36 0
10 BD-13 2130 * 07 37 09.2332503816 -13 54 23.956897032   11.31 10.04     G5IV-V/K2III 67 1
11 NGC 2423 20 * 07 37 11.5325542896 -13 55 44.002619832   12.114 11.099     ~ 19 0
12 NGC 2423 OpC 07 37 11.8 -13 51 47           ~ 149 0
13 NGC 2423 240 * 07 37 46.6035670704 -13 49 44.359104396   11.754 10.701     ~ 18 0
14 BD-12 2361 * 08 09 47.8146301680 -12 54 14.005554660   11.44 10.44     ~ 8 0
15 BD-12 2371 * 08 10 15.1831603128 -12 50 41.107134408   11.64 10.65     ~ 19 0
16 NGC 2539 69 * 08 10 23.0216354184 -12 50 43.299844692   11.75 10.95     ~ 25 0
17 Cl* NGC 2539 LCM 246 * 08 10 32.1348919584 -12 46 19.994288844   12.117 11.158     ~ 7 0
18 NGC 2539 229 * 08 10 33.7971046464 -12 51 48.659317380   11.97 11.01     ~ 23 0
19 NGC 2539 OpC 08 10 37.9 -12 50 02   7.05 6.5     ~ 145 0
20 NGC 2539 51 * 08 10 38.9869434024 -12 44 44.707835148   12.25 11.39     ~ 23 0
21 BD-12 2376 * 08 10 42.8580088968 -12 40 11.620730136   11.48 10.65     K0 36 0
22 NGC 2539 6 * 08 11 12.2651953488 -12 54 01.149856380   11.783 10.805     ~ 16 0
23 NGC 2539 28 * 08 11 27.6666773184 -12 41 06.833186880   11.69 10.86     ~ 26 0
24 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
25 NGC 2682 164 RG* 08 51 28.9910274072 +11 50 33.127331784   11.675 10.441 10.250 9.46 K1III 143 0
26 NGC 2682 266 RG* 08 51 59.5227693496 +11 55 04.835590251   11.65 10.463   9.490 ~ 100 0
27 NGC 2682 286 RG* 08 52 18.5744408733 +11 44 26.374152806   11.541 10.382   9.430 K0III 85 0
28 HD 87109 * 10 00 54.3327938808 -60 13 34.349481948   8.95 7.69     G8Ib/II 44 0
29 HD 87170 * 10 01 17.8747769472 -60 27 02.476724112   10.13 9.09     G8/K0(III) 14 0
30 NGC 3114 OpC 10 02 12.7 -60 02 28   4.47 4.2     ~ 195 0
31 CD-59 2799 * 10 02 41.2469854224 -60 29 03.258599712 11.21 10.78 9.78     ~ 7 0
32 HD 87566 * 10 03 51.4943107536 -60 03 10.214049996   9.55 8.31     K1III 30 0
33 HD 87833 * 10 05 44.0902923984 -60 19 01.000791372   9.69 8.56     G8II/III 33 1
34 IC 2714 190 * 11 16 48.9045959832 -62 43 43.496707332   12.41 11.32     ~ 12 0
35 IC 2714 5 * 11 17 21.8771679648 -62 49 45.817741128   12.20 11.10     ~ 17 0
36 IC 2714 OpC 11 17 29.5 -62 43 08     8.2     ~ 97 0
37 IC 2714 110 * 11 17 30.5748059376 -62 42 27.318268728   12.73 11.73     ~ 17 0
38 IC 2714 121 * 11 17 31.1586029160 -62 43 19.509066048   12.06 10.80     ~ 14 0
39 CPD-62 1958 * 11 17 31.8381153384 -62 44 42.354475260   11.95 11.04     ~ 12 0
40 CPD-62 1960 * 11 17 35.2177606944 -62 43 44.723869320   12.12 11.13     ~ 12 0
41 IC 2714 87 * 11 17 46.8476688864 -62 36 49.492415592   12.602 11.395     ~ 22 0
42 IC 2714 53 * 11 18 15.8550088104 -62 42 03.928323564   12.796 11.522     ~ 14 0
43 CD-42 6963 * 11 25 16.1744004384 -43 14 24.079251516   11.93 10.78     ~ 41 0
44 NGC 3680 OpC 11 25 34.1 -43 14 24   8.40 7.6     ~ 319 0
45 CD-42 6977 * 11 25 38.0643019800 -43 16 06.379106556   12.1 10.8     ~ 39 0
46 CD-42 6981 * 11 25 48.5315765064 -43 09 52.530808176   12.043 10.886 10.08 9.829 ~ 58 0
47 NGC 4349 5 * 12 23 45.4987367544 -61 52 15.531318048   12.846 11.511     ~ 17 0
48 NGC 4349 53 * 12 23 46.0976991888 -61 54 36.174977604   12.45 11.33     ~ 8 0
49 NGC 4349 9 * 12 23 46.8795265680 -61 50 55.966453224   12.925 11.594     ~ 12 0
50 NGC 4349 OpC 12 24 11.5 -61 51 58   8.01 7.4     ~ 113 0
51 CPD-61 3135 SB* 12 24 17.0803858896 -61 55 53.489616348   12.21 11.35     ~ 10 0
52 NGC 4349 127 * 12 24 35.4709473000 -61 49 11.861413644   12.85 10.82     ~ 49 1
53 NGC 4349 168 * 12 24 41.3366269104 -61 52 03.563701860   12.03 11.23     ~ 13 0
54 NGC 4349 174 * 12 24 56.5448152608 -61 52 09.093765936   12.459 10.997     ~ 11 0
55 Cl* NGC 5822 MMU 224 * 15 03 22.8542829960 -54 26 32.861730804 12.579 11.52 10.84     ~ 22 0
56 NGC 5822 87 * 15 03 49.4167331160 -54 20 10.602411612 12.61 11.88 10.84 10.285   ~ 29 0
57 CD-53 5829 * 15 03 50.0100652272 -54 14 30.313520772 11.97 11.33 10.26     ~ 26 0
58 NGC 5822 OpC 15 04 12.2 -54 21 58           ~ 208 0
59 CPD-53 6243 * 15 04 39.4239264528 -54 21 04.106654280 12.20 11.43 10.37 9.820   ~ 29 0
60 NGC 5822 157 * 15 05 31.1445680040 -54 26 20.134965516 12.72 11.97 10.93     ~ 24 0
61 CD-49 11401 * 17 24 41.5351328856 -49 59 06.472009932   11.401 10.363     ~ 40 0
62 CD-49 11402 * 17 24 46.7176119264 -49 54 06.987841164   12.027 10.894     ~ 40 0
63 IC 4651 29 * 17 24 49.4898016320 -49 57 26.935027812   12.03 10.90     K0III 34 0
64 CD-49 11404 * 17 24 50.0710852992 -49 56 56.079791376   11.5 10.7     ~ 48 0
65 IC 4651 OpC 17 24 50.9 -49 55 01           ~ 350 0
66 CD-49 11415 * 17 24 54.1498716864 -49 53 07.518967440   11.76 10.44     ~ 38 0
67 CD-49 11410 * 17 24 57.7608923184 -50 01 32.964118680   11.89 10.78     ~ 29 0
68 CD-49 11413 * 17 25 04.2659268888 -49 58 24.720883788   10.0 10.19     G5 28 0
69 IC 4651 146 * 17 25 23.5409449896 -49 55 47.062096320   12.08 10.94     K0III 29 0
70 NGC 6633 OpC 18 27 22.8 +06 36 54           ~ 385 0
71 HD 170174 RG* 18 27 54.7371519576 +06 36 00.341804160   9.39 8.31     G9IIIFe0.5: 74 0
72 HD 170231 RG* 18 28 00.1840379880 +06 54 51.426979884   9.72 8.69     G8IIb 50 0
73 BD+06 3796 * 18 28 17.6377551864 +06 46 00.033458880   9.96 8.98     G6IIIbFe-1 41 0
74 HD 170292 * 18 28 22.9728031560 +06 42 29.251388160   9.80 8.77     G6.5IIIFe-0.5CH0.5 46 0
75 BD+05 3829 * 18 37 05.2144598832 +05 17 31.621063920 10.58 10.93 9.83     G5 40 0
76 BD+05 3833 * 18 37 20.7739949622 +05 53 43.109227904 10.08 10.43 9.46     G0 25 0
77 BD+05 3835 * 18 37 30.2982427272 +05 12 15.715653660 10.47 10.85 9.77     G5 33 0
78 BD+05 3882 * 18 39 17.8751122128 +05 13 48.737856648 10.09 10.37 9.36     G0 38 0

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