2006A&A...449..417S


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST12:20:36

2006A&A...449..417S - Astronomy and Astrophysics, volume 449, 417-424 (2006/4-1)

A massive planet to the young disc star HD 81040.

SOZZETTI A., UDRY S., ZUCKER S., TORRES G., BEUZIT J.L., LATHAM D.W., MAYOR M., MAZEH T., NAEF D., PERRIER C., QUELOZ D. and SIVAN J.-P.

Abstract (from CDS):

We report the discovery of a massive planetary companion orbiting the young disc star HD 81040. Based on five years of precise radial-velocity measurements with the HIRES and ELODIE spectrographs, we derive a spectroscopic orbit with a period P=1001.0days and eccentricity e=0.53. The inferred minimum mass for the companion of m2sini=6.86MJup places it in the high-mass tail of the extrasolar planet mass distribution. From the ELODIE spectra we derive a Lithium abundance of logε(Li)=1.90, and from the HIRES spectra of the cores of the Ca II H and K lines we derive an activity index of <logR'HK≥-4.48, suggesting an age of about 0.8Gyr. The radial-velocity residuals exhibit a scatter significantly larger than the typical internal measurement precision of the instruments. We attribute this excess velocity jitter to activity on the surface of the moderately young host star. However, the amplitude of the jitter is much too small and the expected period of rotation is much too short to explain the observed orbital motion, which we conclude is due to a massive planetary companion.

Abstract Copyright:

Journal keyword(s): stars: planetary systems - stars: individual: HD 81040 - stars: activity - stars: abundances - techniques: radial velocities - techniques: spectroscopic

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 HD 1237 PM* 00 16 12.6791488703 -79 51 04.244738563 7.692 7.335 6.578     G8V 190 1
2 * iot Hor PM* 02 42 33.4664838826 -50 48 01.056222150   5.97 5.40     F8V 333 1
3 * eps Eri BY* 03 32 55.8449634 -09 27 29.731165 5.19 4.61 3.73 3.00 2.54 K2V 1658 1
4 HD 40979 PM* 06 04 29.9429293369 +44 15 37.597677891       6.4   F8 132 1
5 V* CS Pyx BY* 08 36 23.0163309904 -30 02 15.441850007   8.84 8.06     G8IV-VFe+0.5 127 1
6 HD 80606b Pl 09 22 37.5769478105 +50 36 13.434928660           ~ 265 1
7 HD 81040 PM* 09 23 47.0873633956 +20 21 52.028150111 8.510 8.370   7.3   G0V 68 1
8 HD 121504 PM* 13 57 17.2384093173 -56 02 24.156313081   8.12 7.52     G2V 142 1
9 HD 128311 BY* 14 36 00.5607343227 +09 44 47.453643485 9.232 8.441 7.446 6.895 6.425 K3V 262 1
10 HD 130322 PM* 14 47 32.7265637197 -00 16 53.305928889   8.82 8.04     K0V 224 1
11 HD 141937 PM* 15 52 17.5481365464 -18 26 09.793876507   7.87 7.25     G1V 144 1
12 HD 142415 PM* 15 57 40.7918993254 -60 12 00.922769552   7.94 7.34     G1V 89 1
13 HD 147513 PM* 16 24 01.2905970257 -39 11 34.734611237 6.17 6.02 5.376     G5V 305 1
14 HD 166435 PM* 18 09 21.3817906855 +29 57 06.165674208   7.457 6.829     G1IV 162 0
15 HD 168443 PM* 18 20 03.9331764016 -09 35 44.609316076   7.62 6.92     G6V 276 1
16 HD 178911Bb Pl 19 09 03.0984180671 +34 35 59.473294546           ~ 27 1
17 HD 192263 BY* 20 13 59.8455148268 -00 52 00.771665295 9.447 8.724 7.767 7.231 6.771 K1/2V 208 1
18 HD 196050 ** 20 37 51.7098385539 -60 38 04.147300896   8.16 7.49     G3V 118 2
19 HD 202206 PM* 21 14 57.7684954746 -20 47 21.162361638   8.79 8.07     G6V 192 1
20 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1396 1

    Equat.    Gal    SGal    Ecl

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2019.10.18-12:20:36

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