J/AJ/150/169 Radial velocities of HD 6434 (Hinkel+, 2015)
A new analysis of the exoplanet hosting system HD 6434.
Hinkel N.R., Kane S.R., Pilyavsky G., Boyajian T.S., James D.J., Naef D.,
Fischer D.A., Udry S.
<Astron. J., 150, 169 (2015)>
=2015AJ....150..169H 2015AJ....150..169H (SIMBAD/NED BibCode)
ADC_Keywords: Planets ; Stars, double and multiple ; Radial velocities
Keywords: planetary systems - stars: individual: HD 6434 -
techniques: photometric - techniques: radial velocities
Abstract:
The current goal of exoplanetary science is not only focused on
detecting but characterizing planetary systems in hopes of
understanding how they formed, evolved, and relate to the solar
system. The Transit Ephemeris Refinement and Monitoring Survey (TERMS)
combines both radial velocity (RV) and photometric data in order to
achieve unprecedented ground-based precision in the fundamental
properties of nearby, bright, exoplanet-hosting systems. Here we
discuss HD 6434 and its planet, HD 6434b, which has a
Mpsini=0.44MJ mass and orbits every 22.0170 days with an
eccentricity of 0.146. We have combined previously published RV data
with new measurements to derive a predicted transit duration of ∼6 hr,
or 0.25 days, and a transit probability of 4%. Additionally, we have
photometrically observed the planetary system using both the 0.9 and
1.0m telescopes at the Cerro Tololo Inter-American Observatory,
covering 75.4% of the predicted transit window. We reduced the data
using the automated TERMS Photometry Pipeline, developed to ensure
consistent and accurate results. We determine a dispositive null
result for the transit of HD 6434b, excluding the full transit to a
depth of 0.9% and grazing transit due to impact parameter limitations
to a depth of 1.6%.
Description:
Previous radial velocity observations of HD6434 (Mayor et al. 2004,
cat. J/A+A/415/391) were undertaken with the CORALIE spectrometer
mounted on the 1.2m Euler Swiss telescope at La Silla. Those
observations were conducted as part of the CORALIE exoplanet search
program (Udry et al. 2000, cat. J/A+A/356/590). We continued to
monitor HD6434 using CORALIE to improve the Keplerian orbital solution
and provide an accurate transit ephemeris. The complete data set of
137 measurements is shown in Table2 including previously acquired
measurements and 59 new measurements. These new measurements extend
the overall time baseline for the radial velocity observations by a
factor of ∼3.6, for a total baseline of ∼15 years.
Objects:
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RA (ICRS) DE Designation(s) (Period)
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01 04 40.15 -39 29 17.6 HD 6434 = HIP 5054 (P=22.0170 )
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 26 137 HD 6434 radial velocities
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See also:
J/ApJ/806/60 : Radial velocities of 70 Vir (HD117176) (Kane+, 2015)
J/AJ/148/54 : The Hypatia Catalog ((Hinkel+, 2014)
J/ApJ/761/46 : HD 37605 radial velocities and photometry (Wang+, 2012)
J/A+A/415/391 : The CORALIE survey for extrasolar planets. XII (Mayor+, 2004)
J/A+A/356/590 : The CORALIE survey for extrasolar planets II (Udry+, 2000)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d BJD Barycentric Julian Date (BJD-2440000)
13- 19 F7.4 km/s RV [22.9/23.1] Radial velocity
21- 26 F6.4 km/s e_RV [0.0058/0.012] 1σ uncertainty in RV
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History:
From electronic version of the journal
(End) Sylvain Guehenneux [CDS] 19-Apr-2016