2019AJ....158..181B


Query : 2019AJ....158..181B

2019AJ....158..181B - Astron. J., 158, 181-181 (2019/November-0)

Radial velocity discovery of an eccentric Jovian world orbiting at 18 au.

BLUNT S., ENDL M., WEISS L.M., COCHRAN W.D., HOWARD A.W., MacQUEEN P.J., FULTON B.J., HENRY G.W., JOHNSON M.C., KOSIAREK M.R., LAWSON K.D., MACINTOSH B., MILLS S.M., NIELSEN E.L., PETIGURA E.A., SCHNEIDER G., VANDERBURG A., WISNIEWSKI J.P., WITTENMYER R.A., BRUGAMYER E., CALDWELL C., COCHRAN A.L., HATZES A.P., HIRSCH L.A., ISAACSON H., ROBERTSON P., ROY A. and SHEN Z.

Abstract (from CDS):

Based on two decades of radial velocity (RV) observations using Keck/High Resolution Echelle Spectrometer (HIRES) and McDonald/Tull, and more recent observations using the Automated Planet Finder, we found that the nearby star HR 5183 (HD 120066) hosts a 3 MJ minimum mass planet with an orbital period of 74–22+43 yr. The orbit is highly eccentric (e ≃ 0.84), shuttling the planet from within the orbit of Jupiter to beyond the orbit of Neptune. Our careful survey design enabled high cadence observations before, during, and after the planet's periastron passage, yielding precise orbital parameter constraints. We searched for stellar or planetary companions that could have excited the planet's eccentricity, but found no candidates, potentially implying that the perturber was ejected from the system. We did identify a bound stellar companion more than 15,000 au from the primary, but reasoned that it is currently too widely separated to have an appreciable effect on HR 5183 b. Because HR 5183 b's wide orbit takes it more than 30 au (1'') from its star, we also explored the potential of complimentary studies with direct imaging or stellar astrometry. We found that a Gaia detection is very likely, and that imaging at 10 µm is a promising avenue. This discovery highlights the value of long-baseline RV surveys for discovering and characterizing long-period, eccentric Jovian planets. This population may offer important insights into the dynamical evolution of planetary systems containing multiple massive planets.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): planets and satellites: detection - planets and satellites: fundamental parameters - stars: individual: HR 5183

VizieR on-line data: <Available at CDS (J/AJ/158/181): table1.dat>

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 HD 5183 * 00 53 37.0804915104 -10 40 27.881809968   9.84 9.42     F0/2V 6 0
2 CD-23 395c Pl 01 06 02.0495101320 -22 27 11.350993068           ~ 7 1
3 * 51 Eri b Pl 04 37 36.1326090888 -02 28 24.775726260           ~ 180 0
4 EM* LkCa 15b Pl 04 39 17.7911622816 +22 21 03.390090984           ~ 87 1
5 HD 30177c Pl 04 41 54.3737734560 -58 01 14.727688572           ~ 12 0
6 * bet Pic b Pl 05 47 17.0876901 -51 03 59.441135           ~ 509 1
7 HD 95086b Pl 10 57 03.0215719872 -68 40 02.449216128           ~ 102 1
8 * 47 UMa d Pl 10 59 27.9727514012 +40 25 48.920572724           ~ 26 1
9 HD 107146 PM* 12 19 06.5018840304 +16 32 53.867731128   7.61   6.7   G2V 275 0
10 HD 116434C BD* 13 24 36.13 -51 30 16.7           L5-7 81 1
11 HD 118889 ** 13 39 34.61613 +10 44 46.5827   5.91 5.58     F0V 157 0
12 HD 120066b Pl 13 46 57.1225636378 +06 21 01.346102072           ~ 8 0
13 HD 120066 PM* 13 46 57.1225636378 +06 21 01.346102072   6.96   5.9   G0V 151 0
14 BD+07 2692 PM* 13 47 28.7996763219 +06 18 56.366403405   11.29   9.3   K7Ve 56 0
15 CD-40 8434b Pl 14 08 10.1545500744 -41 23 52.573291080           ~ 199 0
16 CD-45 9206b Pl 14 29 18.5643592920 -46 27 49.737783060           ~ 16 1
17 CD-51 10924c Pl 17 30 11.2044753442 -51 38 13.130309109           ~ 16 1
18 HD 218396b Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 277 1
19 HD 218396c Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 259 1
20 HD 218396d Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 237 1
21 HD 218396e Pl 23 07 28.7157209544 +21 08 03.310767492           ~ 207 1
22 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1135 0

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