2009A&A...505.1311D


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.02CET14:06:43

2009A&A...505.1311D - Astronomy and Astrophysics, volume 505, 1311-1317 (2009/10-3)

Planetary companions around the K giant stars 11 Ursae Minoris and HD 32518.

DOELLINGER M.P., HATZES A.P., PASQUINI L., GUENTHER E.W. and HARTMANN M.

Abstract (from CDS):

11 UMi and HD 32518 belong to a sample of 62 K giant stars that has been observed since February 2004 using the 2m Alfred Jensch telescope of the Thueringer Landessternwarte (TLS) to measure precise radial velocities (RVs). The aim of this survey is to investigate the dependence of planet formation on the mass of the host star by searching for planetary companions around intermediate-mass giants. An iodine absorption cell was used to obtain accurate RVs for this study. Our measurements reveal that the RVs of 11 UMi show a periodic variation of 516.22 days with a semiamplitude of K=189.70m/s. An orbital solution yields a mass function of f(m)=(3.608±0.441)x10–7 solar masses (M) and an eccentricity of e=0.083±0.03. The RV curve of HD 32518 shows sinusoidal variations with a period of 157.54days and a semiamplitude of K=115.83m/s. An orbital solution yields an eccentricity, e=0.008±0.03 and a mass function, f(m)=(2.199±0.235)x10–8M. The HIPPARCOS photometry as well as our Hα core flux measurements reveal no variability with the RV period. Thus, Keplerian motion is the most likely explanation for the observed RV variations for both giant stars. An exoplanet with a ``minimum mass'' of msini=10.50±2.47 Jupiter masses (MJup) orbits the K giant 11 UMi. The K1 III giant HD 32518 hosts a planetary companion with a ``minimum mass'' of msini=3.04±0.68MJup in a nearly circular orbit. These are the 4th and 5th planets published from this TLS survey.

Abstract Copyright:

Journal keyword(s): stars: individual: 11 Ursae Minoris - stars: variables: general - stars: individual: HD 32518 - stars: late-type - techniques: radial velocities - stars: planetary systems

VizieR on-line data: <Available at CDS (J/A+A/505/1311): table2.dat table5.dat>

Simbad objects: 29

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Number of rows : 29

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 * eta02 Hyi PM* 01 54 56.1320498641 -67 38 50.294625663   5.623 4.685     G8IIIb 93 1
2 HD 13189 * 02 09 40.1721335781 +32 18 59.160743793   9.04 7.56     K1II-III 71 1
3 * 81 Cet PM* 02 37 41.8017736241 -03 23 46.226718262   6.674 5.647     K0III 70 1
4 HD 17092 * 02 46 22.1178973456 +49 39 11.094882387   9.00 7.73     K2III 36 1
5 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2715 0
6 * eps Tau ** 04 28 36.9988174 +19 10 49.544603 5.42 4.54 3.53     G9.5IIICN0.5 548 1
7 HD 32518 PM* 05 09 36.7200880014 +69 38 21.855089289 8.550 7.530 6.420     K1III 43 1
8 HD 32518b Pl 05 09 36.7200880014 +69 38 21.855089289           ~ 10 1
9 * 6 Lyn PM* 06 30 47.1070542334 +58 09 45.480746151   6.798 5.855 6.95   K0.5IIIbFe0.5 105 1
10 HD 47536 PM* 06 37 47.6183014773 -32 20 23.033515609   6.43 5.258     K1III 92 1
11 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1055 1
12 * pi.02 UMa PM* 08 40 12.8204103814 +64 19 40.573003186 6.94 5.78 4.61 3.72 3.09 K1+III 150 1
13 * 41 Lyn PM* 09 28 39.9888590373 +45 36 05.335256158   6.389 5.393 6.54   K0III 67 1
14 HD 104985 PM* 12 05 15.1177022665 +76 54 20.638478373       5.2   G8.5IIIb 137 1
15 * chi Vir ** 12 39 14.7669232892 -07 59 44.041075962   5.886 4.643 6.45   K2+IIICN0.5 135 1
16 * 11 UMi b Pl 15 17 05.8915364232 +71 49 26.037470516           ~ 9 1
17 * 11 UMi * 15 17 05.8915364232 +71 49 26.037470516   6.384 5.015     K4III 104 1
18 * iot Dra V* 15 24 55.7746265 +58 57 57.834445 5.68 4.45 3.29 2.51 1.91 K2III 373 1
19 HD 139357 * 15 35 16.1984597370 +53 55 19.714695899   7.160 5.964     K4III: 45 1
20 * kap CrB PM* 15 51 13.9314685012 +35 39 26.564729663 6.69 5.82 4.82 4.06 3.57 K1IVa 237 1
21 HD 167042 PM* 18 10 31.6406187667 +54 17 11.593233378   6.89   5.4   K1III 137 1
22 * 42 Dra PM* 18 25 59.1383795957 +65 33 48.503958394   6.005 4.823     K1.5IIIFe-1 137 1
23 HD 175541 PM* 18 55 40.8840447462 +04 15 55.162278439   8.90 8.00     G6/8IV 100 1
24 * ksi Aql ** 19 54 14.8820884109 +08 27 41.227187849   5.759 4.707     G9.5IIIb 129 1
25 HD 192699 PM* 20 16 06.0041468841 +04 34 50.861333059   7.314 6.446     G8IV 55 1
26 * 18 Del PM* 20 58 25.9336470966 +10 50 21.426095258   6.432 5.506     G6III 76 1
27 HD 210702 * 22 11 51.3309245346 +16 02 25.995895221   6.896 5.930     K0III 86 1
28 * 51 Peg b Pl 22 57 27.9804167474 +20 46 07.782240714           ~ 537 1
29 * 14 And PM* 23 31 17.4127253191 +39 14 10.310491330   6.24   4.6   G8III 159 1

    Equat.    Gal    SGal    Ecl

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2020.12.02-14:06:43

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