J/ApJ/818/34 Radial velocity monitoring of 5 FGK stars (Endl+, 2016)
Two new long-period giant planets from the McDonald observatory planet search
and two stars with long-period radial velocity signals related to stellar
activity cycles.
Endl M., Brugamyer E.J., Cochran W.D., Macqueen P.J., Robertson P.,
Meschiari S., Ramirez I., Shetrone M., Gullikson K., Johnson M.C.,
Wittenmyer R., Horner J., Ciardi D.R., Horch E., Simon A.E., Howell S.B.,
Everett M., Caldwell C., Castanheira B.G.
<Astrophys. J., 818, 34 (2016)>
=2016ApJ...818...34E 2016ApJ...818...34E (SIMBAD/NED BibCode)
ADC_Keywords: Radial velocities ; Stars, double and multiple ; Planets
Abundances, [Fe/H]
Keywords: planetary systems; stars: activity; techniques: radial velocities
Abstract:
We report the detection of two new long-period giant planets orbiting
the stars HD 95872 and HD 162004 (ψ1 Dra B) by the McDonald
Observatory planet search. The planet HD 95872b has a minimum mass of
4.6MJup and an orbital semimajor axis of 5.2AU. The giant planet
ψ1 Dra Bb has a minimum mass of 1.5MJup and an orbital
semimajor axis of 4.4AU. Both of these planets qualify as Jupiter
analogs. These results are based on over one and a half decades of
precise radial velocity (RV) measurements collected by our program
using the McDonald Observatory Tull Coude spectrograph at the 2.7m
Harlan J. Smith Telescope. In the case of ψ1 Dra B we also
detect a long-term nonlinear trend in our data that indicates the
presence of an additional giant planet, similar to the Jupiter-Saturn
pair. The primary of the binary star system, ψ1 Dra A, exhibits
a very large amplitude RV variation due to another stellar companion.
We detect this additional member using speckle imaging. We also report
two cases --HD 10086 and HD 102870 (β Virginis)-- of significant
RV variation consistent with the presence of a planet, but that are
probably caused by stellar activity, rather than reflexive Keplerian
motion. These two cases stress the importance of monitoring the
magnetic activity level of a target star, as long-term activity cycles
can mimic the presence of a Jupiter-analog planet.
Description:
Our radial velocity (RV) measurements were obtained using the 2.7m
Harlan J. Smith Telescope (HJST; R=60000, 3750-10200Å).
For HD 95872, we also obtained 10 precise RV measurements using the
10m Keck I and its HIRES spectrograph (R=50000).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 109 5 Stellar properties
table2.dat 37 44 Differential radial velocity observations
for HD 95872
table4.dat 31 85 Differential radial velocity measurements
for ψ1 Draconis A
table6.dat 43 135 Differential radial velocity and Ca H&K observations
for ψ1 Dra B
table11.dat 68 84 Differential radial velocity and Ca H&K observations
for HD 10086
table12.dat 68 311 Differential radial velocity and Ca H&K observations
for β Virginis
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See also:
J/A+A/576/A48 : Radial velocity monitoring for 6 stars (Moutou+, 2015)
J/ApJ/804/146 : Atmospheric parameters for nearby B-F stars (David+, 2015)
J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)
J/A+A/552/A6 : F-G main-sequence star abundances (Gonzalez Hernandez+, 2013)
J/ApJ/764/78 : Oxygen abundances in nearby FGK stars (Ramirez+, 2013)
J/A+A/546/A61 : Radial velocities for XHIP catalogue (de Bruijne+, 2012)
J/ApJ/746/101 : Diameters and temperatures of AFG stars (Boyajian+, 2012)
J/ApJ/732/55 : Abundances of stars with planets (Schuler+, 2011)
J/AJ/141/45 : Speckel observations of HIP stars (Horch+, 2011)
J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)
J/A+A/508/L17 : Abundances in solar analogs (Ramirez+, 2009)
J/MNRAS/389/869 : Multiplicity among bright stellar systems (Eggleton+, 2008)
J/A+A/465/271 : Oxygen abundances in nearby stars (Ramirez+, 2007)
J/MNRAS/371/1140 : Radial velocities of K0 stars (Griffin+, 2006)
J/ApJS/162/207 : Radial velocities of solar-type stars (Abt+, 2006)
J/ApJS/161/444 : [Fe/H] & Teff for luminosity class IV-V stars (Taylor+, 2005)
J/MNRAS/360/1345 : F- and G-type stars in solar neighbourhood (Karatas+, 2005)
J/MNRAS/349/757 : Masses, ages and metallicities of F-G dwarfs (Lambert+, 2004)
J/A+A/423/517 : Galactic disk late-type stars velocities (Rocha-Pinto+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- Name Star name (1)
13- 18 A6 --- SpT MK spectral type (2)
20- 24 F5.3 mag Vmag [3.5/9.9] V-band magnitude (2)
26- 30 F5.3 mag B-V [0.4/0.9] B-V color index (2)
32- 36 F5.2 mag VMag [3.4/10.5]? V-band absolute magnitude (MV)
38- 43 F6.2 mas Plx [45/133] Parallax (2)
45- 49 F5.2 pc Dist [7/23]? Distance
51- 54 I4 K Teff [5312/6212]? Effective temperature
56- 58 I3 K e_Teff [65/100]? Teff uncertainty
60- 63 F4.2 [cm/s2] logg [3.9/4.5]? Log of surface gravity
65- 68 F4.2 [cm/s2] e_logg [0.1/0.2]? logg uncertainty
70- 73 F4.2 [Sun] [Fe/H] [0.01/0.5]? Abundance of [Fe/H]
75- 78 F4.2 [Sun] e_[Fe/H] [0.04/0.1]? [Fe/H] uncertainty
80- 83 F4.2 Msun Mass [0.95/1.34]? Mass (3)
85- 88 F4.2 Msun e_Mass [0.03/0.1]? Mass uncertainty (3)
90- 93 F4.1 Gyr Age [3.2/10]? Age (3)
95- 97 F3.1 Gyr e_Age [0.7/3.7]? Age uncertainty (3)
99-102 I4 d Per ? Orbital period from tables 3, 5 and 7;
column added by CDS
104-106 I3 d e_Per ? Per uncertainty
108-109 I2 --- Tab Table number; column added by CDS
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Note (1): psi01 Dra A has been added by CDS.
Note (2): Spectral types, photometric data, and parallaxes are taken from the
ASCC-2.5 catalog (Version 3; Kharchenko & Roeser 2009, Cat. I/280).
Note (3): Mass and age estimates from Yonsei-Yale model isochrones
(Yi et al. 2001ApJS..136..417Y 2001ApJS..136..417Y; Kim et al. 2002ApJS..143..499K 2002ApJS..143..499K).
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Byte-by-byte Description of file: table[24].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian Date
18- 25 F8.2 m/s dRVel [-29/12118] Differential radial velocity
27- 31 F5.2 m/s e_dRVel [1/27] Uncertainty in dRVel
33- 37 A5 --- Inst Observation code (not for table 4) (1)
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Note (1): Instrument as follows:
Tull = The 2.7m Harlan J. Smith Telescope with the cross-dispersed
Echelle Tull Coude spectrograph;
Hires = The Keck I 10m telescope with the HIRES spectrograph.
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Byte-by-byte Description of file: table6.dat table1[12].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian Date
18- 23 F6.2 m/s dRVel [-49/48] Differential radial velocity
25- 29 F5.2 m/s e_dRVel [1/20] Uncertainty in dRVel
31- 36 F6.4 --- SHK [0.13/0.34] Ca H and K Mt. Wilson SHK index
38- 43 F6.4 --- e_SHK [0.01/0.03] Uncertainty in SHK
45- 58 E14.8 m/s BVS [-0.04/0.3]? Line bisector velocity span
(not for table 6)
60- 68 F9.7 m/s e_BVS [0.01/0.05]? Uncertainty in BVS (not for table 6)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 25-Apr-2016