2018A&A...614A.138L


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.11CET17:30:38

2018A&A...614A.138L - Astronomy and Astrophysics, volume 614A, 138-138 (2018/6-1)

Detailed chemical compositions of the wide binary HD 80606/80607: revised stellar properties and constraints on planet formation.

LIU F., YONG D., ASPLUND M., FELTZING S., MUSTILL A.J., MELENDEZ J., RAMIREZ I. and LIN J.

Abstract (from CDS):

Differences in the elemental abundances of planet-hosting stars in binary systems can give important clues and constraints about planet formation and evolution. In this study we performed a high-precision, differential elemental abundance analysis of a wide binary system, HD 80606/80607, based on high-resolution spectra with high signal-to-noise ratio obtained with Keck/HIRES. HD 80606 is known to host a giant planet with the mass of four Jupiters, but no planet has been detected around HD 80607 so far. We determined stellar parameters as well as abundances for 23 elements for these two stars with extremely high precision. Our main results are that (i) we confirmed that the two components share very similar chemical compositions, but HD 80606 is marginally more metal-rich than HD 80607, with an average difference of +0.013 ± 0.002 dex (σ = 0.009 dex); and (ii) there is no obvious trend between abundance differences and condensation temperature. Assuming that this binary formed from material with the same chemical composition, it is difficult to understand how giant planet formation could produce the present-day photospheric abundances of the elements we measure. We cannot exclude the possibility that HD 80606 might have accreted about 2.5 to 5 MEarth material onto its surface, possibly from a planet destabilised by the known highly eccentric giant.

Abstract Copyright: © ESO 2018

Journal keyword(s): planets and satellites: formation - binaries: general - stars: abundances - stars: atmospheres - stars: individual: (HD 80606, HD 80607)

VizieR on-line data: <Available at CDS (J/A+A/614/A138): tablea1.dat>

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * zet01 Ret PM* 03 17 46.1632605674 -62 34 31.154247481 6.24 6.18 5.54 5.00 4.66 G2.5VHdel1 266 0
2 * zet02 Ret PM* 03 18 12.8185412558 -62 30 22.917300282   5.84 5.24     G1V 321 0
3 HD 20781 ** 03 20 02.9428 -28 47 01.790   9.263 8.44 8.17 8.43 G9.5V 81 1
4 HD 20782 PM* 03 20 03.5777409770 -28 51 14.660409684   8.03 7.38     G1.5V 154 1
5 XO-2 PM* 07 48 06.4726006390 +50 13 32.921121328   12.002 11.138 10.669 10.243 G9V 136 1
6 XO-2S PM* 07 48 07.4814220176 +50 13 03.257811342   11.927 11.086 10.631 10.216 G9V 40 0
7 NGC 2682 OpC 08 51 18 +11 48.0           ~ 1991 0
8 HD 80606 PM* 09 22 37.5769478105 +50 36 13.434928660   9.78 9.00     G5 282 2
9 HD 80606b Pl 09 22 37.5769478105 +50 36 13.434928660           ~ 266 1
10 HD 80607 PM* 09 22 39.7367015092 +50 36 13.952617706   9.937 9.070     G5 78 2
11 HD 133131A PM* 15 03 35.4462766650 -27 50 33.220140030   9.05 8.46 9.18   G2V 20 0
12 BD+36 2593 * 15 19 57.9205371377 +36 13 46.737977732   11.83 11.12     F 79 1
13 Kepler-10 Ro* 19 02 43.0612302512 +50 14 28.700759378       11.00   G 149 4
14 * 16 Cyg A ** 19 41 48.9539315338 +50 31 30.218780803 6.79 6.59 5.95 5.50 5.17 G1.5Vb 666 1
15 WASP-94A PM* 20 55 07.9445087070 -34 08 08.007683146   10.74 10.05 10.17 9.774 F8 29 0
16 WASP-94B * 20 55 09.1578915938 -34 08 07.915242113       10.51 10.06 F9 12 0
17 BD+37 4734B PM* 22 57 46.8443014981 +38 40 30.355384717   10.82 9.87     G0V 138 1
18 HD 240429 PM* 23 51 55.0287723390 +59 42 48.599105920   10.28 9.70     K0 13 0
19 HD 240430 PM* 23 52 09.2435257553 +59 42 26.518874234   10.16 9.56     G0 14 0

    Equat.    Gal    SGal    Ecl

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2019.12.11-17:30:38

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