J/ApJ/768/155 Radial velocities and photometry of HD 38529 system (Henry+, 2013)
Host star properties and transit exclusion for the HD 38529 planetary system.
Henry G.W., Kane S.R., Wang S.X., Wright J.T., Boyajian T.S., von Braun K.,
Ciardi D.R., Dragomir D., Farrington C., Fischer D.A., Hinkel N.R.,
Howard A.W., Jensen E., Laughlin G., Mahadevan S., Pilyavsky G.
<Astrophys. J., 768, 155 (2013)>
=2013ApJ...768..155H 2013ApJ...768..155H
ADC_Keywords: Photometry ; Radial velocities ; Stars, double and multiple ;
Planets
Keywords: planetary systems; stars: individual: HD 38529;
techniques: photometric; techniques: radial velocities
Abstract:
The transit signature of exoplanets provides an avenue through which
characterization of exoplanetary properties may be undertaken, such as
studies of mean density, structure, and atmospheric composition. The
Transit Ephemeris Refinement and Monitoring Survey is a program to
expand the catalog of transiting planets around bright host stars by
refining the orbits of known planets discovered with the radial
velocity technique. Here we present results for the HD 38529 system.
We determine fundamental properties of the host star through direct
interferometric measurements of the radius and through spectroscopic
analysis. We provide new radial velocity measurements that are used to
improve the Keplerian solution for the two known planets, and we find
no evidence for a previously postulated third planet. We also present
12 years of precision robotic photometry of HD 38529 that demonstrate
the inner planet does not transit and the host star exhibits cyclic
variations in seasonal mean brightness with a timescale of
approximately six years.
Description:
HD 38529 was observed during three nights in 2012 November using the
Georgia State University Center for High Angular Resolution Astronomy
(CHARA) interferometric array.
The RV data for HD 38529 presented here comprise 436 measurements and
were acquired from three instruments/telescopes: the High Resolution
Spectrograph on the Hobby-Eberly Telescope (HET), the Hamilton
Echelle Spectrograph on the 3.0m Shane Telescope at Lick Observatory,
and the HIRES echelle spectrometer on the 10.0m Keck I telescope.
We acquired 1106 photometric observations of HD 38529 on 992 nights
between 2000 November 28 and 2012 March 31, all with the T11 0.80m APT
at Fairborn Observatory in Arizona; in Stromgren b and y passbands.
Objects:
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RA (ICRS) DE Designation(s) (Periods)
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05 46 34.91 +01 10 05.5 HD 38529 = HIP 27253 (Pb=14.309;Pc=2134)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 44 436 HD 38529 radial velocities
table4.dat 101 12 Summary of photometric observations for HD 38529
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See also:
II/215 : uvby-beta Catalogue (Hauck+ 1997)
II/80 : Homogeneous Photometry Bright Stars on DDO System (McClure+ 1981)
II/5 : UBV Photometry of Bright Stars (Johnson+ 1966)
J/ApJ/761/46 : HD 37605 radial velocities and photometry (Wang+, 2012)
J/ApJ/754/37 : HD 192263 radial velocities and photometry (Dragomir+, 2012)
J/A+A/546/A61 : Radial velocities for XHIP catalogue (de Bruijne+, 2012)
J/PASP/123/412 : Exoplanet Orbit Database (Wright+, 2011)
J/ApJ/736/87 : Abundances in G-type stars with exoplanets (Kang+, 2011)
J/ApJ/736/19 : Kepler planetary candidates. II. (Borucki+, 2011)
J/ApJ/733/68 : Exoplanet masses derived from RVs (Brown+, 2011)
J/ApJ/725/2349 : C/O vs Mg/Si of planetary systems (Delgado Mena+, 2010)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/A+A/521/A40 : Stroemgren photometry of Milky Way stars (Arnadottir+, 2010)
J/A+A/511/A54 : Magnetic cycles & radial-velocity for 8 stars (Santos+, 2010)
J/AJ/138/312 : Activity of bright solar analogs (Hall+, 2009)
J/ApJ/693/1084 : Ten new and updated multiplanet systems (Wright+, 2009)
J/ApJS/182/97 : Radial velocities of multi-planet systems (Wittenmyer+, 2009)
J/ApJ/646/523 : Exoplanet systems with stellar companions (Raghavan+, 2006)
J/A+A/449/723 : Abundances in atmospheres of stars with planets (Gilli+, 2006)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)
J/A+AS/102/89 : uvby-beta Photometry of G5 stars (Olsen 1993)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 F16.10 d JD Julian Date of observation; JD-2440000
18- 30 F13.8 m/s RVel [-196.4/314.9] Radial velocity
32- 42 F11.8 m/s e_RVel [0.8/26] The 1σ uncertainty in RVel
44 I1 --- Set Dataset identifier code (1)
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Note (1): Code as follows:
1 = HET data from Benedict et al. (2010AJ....139.1844B 2010AJ....139.1844B);
2 = new HET data presented here;
3 = Keck data from Wright et al. (2009, J/ApJ/693/1084);
4 = Keck data from Wright et al. (2009, J/ApJ/693/1084) before
2009 September 15, new Keck data presented here thereafter;
5 = Lick data from Wright et al. (2009, J/ApJ/693/1084);
6 = Lick data from Wright et al. (2009, J/ApJ/693/1084) before
2009 September 15, new Lick data presented here thereafter.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 "YYYY-MM" Date Observing season
9- 11 I3 --- Nobs [47/118] Number of observations
13- 17 I5 d HJD1 Lower range of Julian Date; HJD-2400000
18 A1 --- --- [-]
19- 23 I5 d HJD2 Upper range of Julian Date; HJD-2400000
25- 31 F7.5 mag Sig [0.001/0.003] scatter σ value
33- 36 F4.1 d Prot [35.7/38.5]? Rotation period
38- 40 F3.1 d e_Prot [0.2/0.5]? Prot uncertainty
42 A1 --- f_Prot Doubled period (1)
44- 49 F6.4 mag Amp [0.002/0.005]? Full amplitude
51- 56 F6.4 mag e_Amp [0.0003/0.0007]? Amp uncertainty
58- 64 F7.4 mag <P-C1> [-1.9/-1.8] Mean P-C1 differential magnitude (2)
66- 71 F6.4 mag e_<P-C1> [0.0001/0.0002] <P-C1> uncertainty
73- 79 F7.4 mag <P-C2> [-1.9/-1.8] Mean P-C2 differential magnitude (2)
81- 86 F6.4 mag e_<P-C2> [0.0001/0.0002] <P-C2> uncertainty
88- 94 F7.4 mag <C2-C1> [-0.03/-0.02] Mean C2-C1 differential
magnitude (2)
96-101 F6.4 mag e_<C2-C1> [0.0001/0.0002] <C2-C1> uncertainty
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Note (1):
a = Periodogram analysis gave half of the quoted period, implying the star
had spots on both hemispheres at those epochs. We doubled the
photometric periods and their errors in these cases to get Prot.
Note (2): We programmed the APT to make differential brightness measurements
of our program star HD 38529 (P, V=5.95, B-V=0.77, G4 IV) with respect
to the two comparison stars HD 38145 (C1, V=7.89, B-V=0.33, F0 V) and
HD 40259 (C2, V=7.86, B-V=0.38, F0 V). From the raw counts in both
pass bands, we compute the differential magnitudes P-C1, P-C2, and
C2-C1, correct them for atmospheric extinction, and transform them
to the Stromgren system. See section 4 for further explanations.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 28-Nov-2014