2018A&A...613A..47A


Query : 2018A&A...613A..47A

2018A&A...613A..47A - Astronomy and Astrophysics, volume 613A, 47-47 (2018/5-1)

Tracking Advanced Planetary Systems (TAPAS) with HARPS-N. VI. HD 238914 and TYC 3318-01333-1: two more Li-rich giants with planets.

ADAMOW M., NIEDZIELSKI A., KOWALIK K., VILLAVER E., WOLSZCZAN A., MACIEJEWSKI G. and GROMADZKI M.

Abstract (from CDS):

Context. We present the latest results of our search for planets with HARPS-N at the 3.6 m Telescopio Nazionale Galileo under the Tracking Advanced Planetary Systems project: an in-depth study of the 15 most Li abundant giants from the PennState - Torun Planet Search sample. Aims. Our goals are first, to obtain radial velocities of the most Li-rich giants we identified in our sample to search for possible low-mass substellar companions, and second, to perform an extended spectral analysis to define the evolutionary status of these stars. Methods. This work is based on high-resolution spectra obtained with the Hobby-Eberly Telescope and its High Resolution Spectrograph, and with the HARPS-N spectrograph at the Telescopio Nazionale Galileo. Two stars, HD 181368 and HD 188214, were also observed with UVES at the VLT to determine beryllium abundances. Results. We report i) the discovery of two new planetary systems around the Li-rich giant stars: HD 238914 and TYC 3318-01333-1 (a binary system); ii) reveal a binary Li-rich giant, HD 181368; iii) although our current phase coverage is not complete, we suggest the presence of planetary mass companions around TYC 3663-01966-1 and TYC 3105-00152-1; iv) we confirm the previous result for BD+48 740 and present updated orbital parameters, and v) we find a lack of a relation between the Li enhancement and the Be abundance for the stars HD 181368 and HD 188214, for which we acquired blue spectra. Conclusions. We found seven stars with stellar or potential planetary companions among the 15 Li-rich giant stars. The binary star frequency of the Li-rich giants in our sample appears to be normal, but the planet frequency is twice that of the general sample, which suggests a possible connection between hosting a companion and enhanced Li abundance in giant stars. We also found most of the companions orbits to be highly eccentric.

Abstract Copyright: © ESO 2018

Journal keyword(s): stars: late-type - planets and satellites: detection - techniques: radial velocities - techniques: spectroscopic - stars: chemically peculiar

VizieR on-line data: <Available at CDS (J/A+A/613/A47): table1.dat table2.dat>

Simbad objects: 28

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Number of rows : 28
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME TYC 3663-01966-1b Pl? 00 42 29.6252717663 +57 51 32.241827481           ~ 1 0
2 TYC 3663-1966-1 * 00 42 29.6254610472 +57 51 32.243280012   10.72 9.77     ~ 9 0
3 HD 5916 PM* 01 01 19.0237779264 +45 27 07.392023460   7.749 6.863     G8III-IV 76 0
4 HD 14067b Pl 02 17 10.4397449637 +23 46 04.192053492           ~ 5 0
5 TYC 3300-133-1 * 02 40 15.0508741968 +48 42 15.432406308   10.61 9.51     ~ 7 0
6 BD+48 740b Pl 02 42 58.2182761768 +48 55 48.225888943           ~ 4 0
7 BD+48 740 * 02 42 58.2184733280 +48 55 48.224133048   10.05 8.70     K3III 34 0
8 BD+49 827b Pl 03 02 19.7862546512 +49 44 38.979884292           ~ 2 0
9 BD+49 827 * 03 02 19.7863241976 +49 44 38.981155812   11.13 9.90     ~ 12 0
10 Cl Melotte 20 24 * 03 08 20.4355132728 +48 44 51.376580016   11.04 9.81     G5 9 0
11 TYC 684-553-1 * 04 51 18.5690153424 +07 46 31.053593604   11.44 10.30     ~ 8 0
12 BD-13 2130 * 07 37 09.2332503816 -13 54 23.956897032   11.31 10.04     G5IV-V/K2III 62 1
13 NGC 2423 OpC 07 37 12 -13 51.8           ~ 137 0
14 HD 107028 PM* 12 18 00.2426385120 +68 47 49.347013236   8.47 7.64 11.8   G5 18 1
15 NGC 4349 OpC 12 24 12 -61 52.0   8.01 7.4     ~ 103 0
16 * 8 UMi * 14 56 48.3523031832 +74 54 03.321176292   7.834 6.835     K0 32 0
17 ASAS J172315+0255.3 Ro* 17 23 15.0856757448 +02 55 38.970398676   11.35 10.391   9.050 ~ 8 0
18 Cl Melotte 186 OpC 18 02 24 +03 15.6     3.0     ~ 69 0
19 BD+02 3495 PM* 18 07 33.0559241856 +02 07 16.904891208   10.68 9.82     G5 3 0
20 BD+02 3497 * 18 08 06.0107747544 +02 37 58.797339960   10.20 9.01     K0 8 0
21 TYC 3105-152-1 * 18 36 29.3352012840 +39 04 11.761349916   10.97 9.81     K1III 13 0
22 NAME TYC 3105-00152-1b Pl? 18 36 29.3353988287 +39 04 11.759709371           ~ 1 0
23 HD 238914 * 18 38 20.2179727056 +59 15 13.894293168   9.81 8.79     K7 18 0
24 HD 238914b Pl 18 38 20.2183121238 +59 15 13.895123767           ~ 2 0
25 TYC 3930-681-1 * 18 43 12.528239 +58 40 26.73432   12.12 10.82     ~ 7 0
26 HD 181368b Pl? 19 20 16.0289785403 -02 35 56.664105796           ~ 2 0
27 HD 181368 PM* 19 20 16.0292517504 -02 35 56.675550696   8.97 8.02     K0V 7 0
28 HD 188214 * 19 53 50.3078721120 +08 25 51.954944268   9.56 8.41     K2 9 0

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2022.12.07-12:06:05

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