2008ApJ...680L..57B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST20:22:23

2008ApJ...680L..57B - Astrophys. J., 680, L57-L60 (2008/June-2)

The successful prediction of the extrasolar planet HD 74156d.

BARNES R., GOZDZIEWSKI K. and RAYMOND S.N.

Abstract (from CDS):

Most of the first-discovered extrasolar multiplanet systems were found to lie close to dynamically unstable configurations. However, a few observed multiplanet systems (e.g., HD 74156) did not show this trait. Those systems could share this property if they contain an additional planet in between those that are known. Previous investigations identified the properties of hypothetical planets that would place these systems near instability. The hypothetical planet in HD 74156 was expected to have a mass about equal to that of Saturn, a semimajor axis between 0.9 and 1.4 AU, and an eccentricity less than 0.2. HD 74156d, a planet with a mass of 1.3 Saturn masses at 1.04 AU with an eccentricity of 0.25, was recently announced. We have reanalyzed all published data on this system in order to place tighter constraints on the properties of the new planet. We find two possible orbits for this planet, one close to that already identified and another (with a slightly better fit to the data) at ∼0.89 AU. We also review the current status of other planet predictions, discuss the observed single-planet systems, and suggest other systems which may contain planets in between those that are already known. The confirmation of the existence of HD 74156d suggests that planet formation is an efficient process, and planetary systems should typically contain many planets.

Abstract Copyright:

Journal keyword(s): Methods: {em n}-Body Simulations - Stars: Planetary Systems - stars: individual (HD 74156)

Simbad objects: 15

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Number of rows : 15

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 * ups And PM* 01 36 47.84216 +41 24 19.6443 4.70 4.64 4.10 3.64 3.35 F9V 881 1
2 HD 37124 PM* 05 37 02.4866790656 +20 43 50.834619370   8.35   7.2   G4IV-V 263 2
3 HD 38529 PM* 05 46 34.9129896843 +01 10 05.512540812       5.4   G8III/IV 305 2
4 HD 68988 PM* 08 18 22.1727278398 +61 27 38.597348068   8.84 8.19     G0 128 2
5 HD 74156b Pl 08 42 25.1221445320 +04 34 41.146391815           ~ 57 1
6 HD 74156d Pl? 08 42 25.1221445320 +04 34 41.146391815           ~ 18 1
7 HD 74156c Pl 08 42 25.1221445320 +04 34 41.146391815           ~ 50 1
8 HD 74156 PM* 08 42 25.1221445320 +04 34 41.146391815       7.2   G1V 194 2
9 * rho01 Cnc PM* 08 52 35.8113282132 +28 19 50.956901366 7.45 6.82   5.4   K0IV-V 945 1
10 HD 82943 PM* 09 34 50.7352288445 -12 07 46.363303103   7.17 6.53     F9VFe+0.5 395 2
11 * 47 UMa PM* 10 59 27.9738644892 +40 25 48.922388918   5.66   4.7   G1-VFe-0.5 705 1
12 HD 168443 PM* 18 20 03.9331764016 -09 35 44.609316076   7.62 6.92     G6V 276 1
13 HD 187123 PM* 19 46 58.1122608389 +34 25 10.279867125       7.4   G2V 210 1
14 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 829 1
15 HD 217107 ** 22 58 15.5411942071 -02 23 43.387117210   6.919 6.163     G8IV/V 326 1

    Equat.    Gal    SGal    Ecl

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2019.10.19-20:22:23

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