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


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET18:01:01

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 - 2021
#notes
1 NGC 2360 79 * 07 17 16.9115518469 -15 38 40.671999926 12.99 12.31 11.29     ~ 13 0
2 NGC 2360 66 * 07 17 19.4553774978 -15 34 23.866069507 12.74 12.20 11.27     ~ 10 0
3 NGC 2360 85 * 07 17 32.5642137302 -15 38 59.396363580 13.11 12.44 11.44     ~ 17 0
4 HIP 35305 * 07 17 35.0708192014 -15 38 35.432946261 12.48 11.80 10.77     ~ 26 0
5 NGC 2360 89 * 07 17 35.6412560195 -15 37 30.711656430 12.74 12.05 11.05     ~ 10 0
6 NGC 2360 OpC 07 17 43 -15 38.5           ~ 171 0
7 TYC 5965-749-1 * 07 17 43.0358407509 -15 37 32.156044357 12.83 12.10 11.09     ~ 19 0
8 NGC 2360 119 * 07 17 48.6966772111 -15 39 41.148736836 12.83 12.07 11.03     ~ 14 0
9 HIP 35366 * 07 18 19.0083278443 -15 34 59.422196042 12.79 12.10 11.10     ~ 25 0
10 NGC 2423 OpC 07 37 06 -13 52.3           ~ 125 0
11 BD-13 2130 * 07 37 09.2333520617 -13 54 23.954320858   11.31 10.04     G5IV-V/K2III 57 1
12 NGC 2423 20 * 07 37 11.5323050529 -13 55 43.999728913   12.114 11.099     ~ 14 0
13 NGC 2423 240 * 07 37 46.6037591430 -13 49 44.355393958   11.754 10.701     ~ 13 0
14 BD-12 2361 * 08 09 47.8147800707 -12 54 14.004072943   11.44 10.44     ~ 4 0
15 BD-12 2371 * 08 10 15.1831459245 -12 50 41.105058139   11.64 10.65     ~ 10 0
16 NGC 2539 69 * 08 10 23.0217217056 -12 50 43.297170533   11.75 10.95     ~ 16 0
17 Cl* NGC 2539 LCM 246 * 08 10 32.1349363532 -12 46 19.993530831   12.117 11.158     ~ 5 0
18 NGC 2539 229 * 08 10 33.7972463307 -12 51 48.659404398   11.97 11.01     ~ 14 0
19 NGC 2539 OpC 08 10 37 -12 49.1   7.05 6.5     ~ 120 0
20 NGC 2539 51 * 08 10 38.9868710600 -12 44 44.704648962   12.25 11.39     ~ 13 0
21 BD-12 2376 * 08 10 42.8580974084 -12 40 11.620000315   11.48 10.65     K0 22 0
22 NGC 2539 6 * 08 11 12.2652129036 -12 54 01.147730010   11.783 10.805     ~ 8 0
23 NGC 2539 28 * 08 11 27.6666734005 -12 41 06.831510207   11.69 10.86     ~ 16 0
24 NGC 2682 OpC 08 51 18 +11 48.0           ~ 2085 0
25 NGC 2682 164 RG* 08 51 28.9911734176 +11 50 33.129974313   11.675 10.441 10.250 9.46 K1III 120 0
26 NGC 2682 266 RG* 08 51 59.5227988109 +11 55 04.837738790   11.65 10.463   9.490 ~ 75 0
27 NGC 2682 286 RG* 08 52 18.5744306643 +11 44 26.376261817   11.541 10.382   9.430 K0III 63 0
28 HD 87109 * 10 00 54.3329016882 -60 13 34.347524376   8.95 7.69     G8Ib/II 35 0
29 HD 87170 * 10 01 17.8746619183 -60 27 02.475883597   10.13 9.09     G8/K0(III) 13 0
30 NGC 3114 OpC 10 02 36 -60 07.2   4.47 4.2     ~ 172 0
31 CD-59 2799 * 10 02 41.2467729006 -60 29 03.256644033 11.21 10.78 9.78     ~ 6 0
32 HD 87566 * 10 03 51.4941365714 -60 03 10.211816565   9.55 8.31     K1III 23 0
33 HD 87833 * 10 05 44.0900973535 -60 19 00.999768154   9.69 8.56     G8II/III 26 1
34 IC 2714 190 * 11 16 48.9043916058 -62 43 43.495786468   12.41 11.32     ~ 6 0
35 IC 2714 5 * 11 17 21.8772063817 -62 49 45.817435276   12.20 11.10     ~ 10 0
36 IC 2714 OpC 11 17 27 -62 44.0     8.2     ~ 77 0
37 IC 2714 110 * 11 17 30.5749253222 -62 42 27.315685143   12.73 11.73     ~ 11 0
38 IC 2714 121 * 11 17 31.1584153783 -62 43 19.506502486   12.06 10.80     ~ 6 0
39 CPD-62 1958 * 11 17 31.8381098058 -62 44 42.352159036   11.95 11.04     ~ 6 0
40 CPD-62 1960 * 11 17 35.2178035186 -62 43 44.722898541   12.12 11.13     ~ 6 0
41 IC 2714 87 * 11 17 46.8476202481 -62 36 49.491127243   12.602 11.395     ~ 12 0
42 IC 2714 53 * 11 18 15.8547590384 -62 42 03.926757411   12.796 11.522     ~ 8 0
43 CD-42 6963 * 11 25 16.1744259582 -43 14 24.077225710   11.93 10.78     ~ 34 0
44 NGC 3680 OpC 11 25 38 -43 14.6   8.40 7.6     ~ 293 0
45 CD-42 6977 * 11 25 38.0643755759 -43 16 06.376798739   12.1 10.8     ~ 36 0
46 CD-42 6981 * 11 25 48.5315004431 -43 09 52.527192273   12.043 10.886 10.08 9.829 ~ 44 0
47 NGC 4349 5 * 12 23 45.4988040859 -61 52 15.529031965   12.846 11.511     ~ 11 0
48 NGC 4349 53 * 12 23 46.0971389752 -61 54 36.174338894   12.45 11.33     ~ 4 0
49 NGC 4349 9 * 12 23 46.8791806197 -61 50 55.964703555   12.925 11.594     ~ 7 0
50 NGC 4349 OpC 12 24 08 -61 52.3   8.01 7.4     ~ 94 0
51 CPD-61 3135 SB* 12 24 17.0802989178 -61 55 53.489022019   12.21 11.35     ~ 7 0
52 NGC 4349 127 * 12 24 35.4709937902 -61 49 11.859118499   12.85 10.82     ~ 42 1
53 NGC 4349 168 * 12 24 41.3363744868 -61 52 03.562499645   12.03 11.23     ~ 8 0
54 NGC 4349 174 * 12 24 56.5447588323 -61 52 09.094244374   12.459 10.997     ~ 7 0
55 Cl* NGC 5822 MMU 224 * 15 03 22.8543979137 -54 26 32.862528265 12.579 11.52 10.84     ~ 16 0
56 NGC 5822 87 * 15 03 49.4166121059 -54 20 10.597900783 12.61 11.88 10.84 10.285   ~ 21 0
57 CD-53 5829 * 15 03 50.0102056206 -54 14 30.308758769 11.97 11.33 10.26     ~ 20 0
58 NGC 5822 OpC 15 04 28 -54 23.4           ~ 176 0
59 CPD-53 6243 * 15 04 39.4239016628 -54 21 04.102051844 12.20 11.43 10.37 9.820   ~ 19 0
60 NGC 5822 157 * 15 05 31.1443670928 -54 26 20.134873476 12.72 11.97 10.93     ~ 18 0
61 CD-49 11401 * 17 24 41.5352500573 -49 59 06.472606126   11.401 10.363     ~ 29 0
62 CD-49 11402 * 17 24 46.7175582312 -49 54 06.990074317   12.027 10.894     ~ 30 0
63 IC 4651 OpC 17 24 49 -49 56.0           ~ 316 0
64 IC 4651 29 * 17 24 49.4896781310 -49 57 26.934679880   12.03 10.90     K0III 25 0
65 CD-49 11404 * 17 24 50.0711175768 -49 56 56.080865466   11.5 10.7     ~ 31 0
66 CD-49 11415 * 17 24 54.1499868721 -49 53 07.523056468   11.76 10.44     ~ 27 0
67 CD-49 11410 * 17 24 57.7598325878 -50 01 32.957880075   11.89 10.78     ~ 22 0
68 CD-49 11413 * 17 25 04.2659916530 -49 58 24.722668399   10.0 10.19     G5 18 0
69 IC 4651 146 * 17 25 23.5405860817 -49 55 47.059550360   12.08 10.94     K0III 24 0
70 NGC 6633 OpC 18 27 31.2 +06 34 12           ~ 333 0
71 HD 170174 RG* 18 27 54.7372445775 +06 36 00.343220689   9.39 8.31     G9IIIFe0.5: 58 0
72 HD 170231 RG* 18 28 00.1841336968 +06 54 51.425120573   9.72 8.69     G8IIb 35 0
73 BD+06 3796 * 18 28 17.6378223793 +06 46 00.030849718   9.96 8.98     G6IIIbFe-1 33 0
74 HD 170292 * 18 28 22.9731175364 +06 42 29.251591488   9.80 8.77     G6.5IIIFe-0.5CH0.5 33 0
75 BD+05 3829 * 18 37 05.2146447935 +05 17 31.620772375 10.58 10.93 9.83     G5 30 0
76 BD+05 3833 * 18 37 20.7739544039 +05 53 43.108019046 10.08 10.43 9.46     G0 18 0
77 BD+05 3835 * 18 37 30.2983697812 +05 12 15.716569306 10.47 10.85 9.77     G5 24 0
78 BD+05 3882 * 18 39 17.8752632698 +05 13 48.734790627 10.09 10.37 9.36     G0 30 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-18:01:01

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