J/A+A/603/A43 CoRoT-9 radial velocity curve (Bonomo+, 2017)
A deeper view of the CoRoT-9 planetary system. A small non-zero eccentricity
for CoRoT-9b likely generated by planet-planet scattering.
Bonomo A.S., Hebrard G., Raymond S.N., Bouchy F., Lecavelier des Etangs A.,
Borde P., Aigrain S., Almenara J.-M., Alonso R., Cabrera J., Csizmadia Sz.,
Damiani C., Deeg H.J., Deleuil M., Diaz R.F., Erikson A., Fridlund M.,
Gandolfi D., Guenther E., Guillot T., Hatzes A., Izidoro A., Lovis C.,
Moutou C., , Ollivier M., Paetzold M., Rauer H., Rouan D., Santerne A.,
Schneider J.
<Astron. Astrophys. 603, A43 (2017)>
=2017A&A...603A..43B 2017A&A...603A..43B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: planetary systems - techniques: radial velocities -
techniques: photometric - stars: individual: CoRoT-9
Abstract:
CoRoT-9b is one of the rare long-period (P=95.3days) transiting giant
planets with a measured mass known to date. We present a new analysis
of the CoRoT-9 system based on five years of radial-velocity (RV)
monitoring with HARPS and three new space-based transits observed with
CoRoT and Spitzer. Combining our new data with already published
measurements we redetermine the CoRoT-9 system parameters and find
good agreement with the published values. We uncover a higher
significance for the small but non-zero eccentricity of CoRoT-9b
(e=0.133+0.042-0.037) and find no evidence for additional planets
in the system. We use simulations of planet-planet scattering to show
that the eccentricity of CoRoT-9b may have been generated by an
instability in which a ∼50M{earth} planet was ejected from the
system. This scattering would not have produced a spin-orbit
misalignment, so we predict that the CoRoT-9b orbit should lie within
a few degrees of the initial plane of the protoplanetary disk. As a
consequence, any significant stellar obliquity would indicate that the
disk was primordially tilted.
Description:
We obtained 28 radial-velocity observations of CoRoT-9 between
September 2008 and August 2013 with the HARPS fibrefed spectrograph
at the 3.6m ESO telescope in La Silla, Chile (programme 184.C-0639).
Objects:
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RA (2000) DE Designation(s)
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18 43 08.81 +06 12 14.9 CoRoT-9 = 2MASS J18430881+0612150
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 40 28 HARPS radial-velocity measurements of CoRoT-9
(CoRoT 105891283)
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See also:
B/corot : CoRoT observation log (N2-4.4) (CoRoT 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.4 d BJD Barycentric Julian date (BJD-2450000)
10 A1 --- n_BJD [*] * for measurements corrected for moonlight
pollution
12- 17 F6.3 km/s RV Radial velocity
19- 23 F5.3 km/s e_RV rms uncertainty on RV
25- 30 F6.3 km/s Bis Bisector span (error bars are twice those of
the RVs)
32- 35 I4 s Texp Duration of each individual exposure
37- 40 F4.1 --- S/N Signal-to-noise ratio per pixel at 550nm
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-May-2017