J/AJ/161/86 Radial velocities of Gl 414A with Keck I and APF (Dedrick+, 2021)
Two planets straddling the habitable zone of the nearby K dwarf Gl 414A.
Dedrick C.M., Fulton B.J., Knutson H.A., Howard A.W., Beatty T.G.,
Cargile P.A., Gaudi B.S., Hirsch L.A., Kuhn R.B., Lund M.B., James D.J.,
Kosiarek M.R., Pepper J., Petigura E.A., Rodriguez J.E., Stassun K.G.,
Stevens D.J.
<Astron. J., 161, 86 (2021)>
=2021AJ....161...86D 2021AJ....161...86D
ADC_Keywords: Exoplanets; Stars, K-type; Stars, dwarfs; Radial velocities;
Spectra, optical
Keywords: Exoplanets ; Radial velocity ; Gaussian Processes regression ;
K dwarf stars ; Exoplanet systems
Abstract:
We present the discovery of two planets orbiting the nearby (D=11.9pc)
K7 dwarf Gl414A. Gl414Ab is a sub-Neptune mass planet with
Mbsinib=7.60-2.19+2.44M⊕ and a semimajor axis of
0.23±0.01au. Gl414Ac is a sub-Saturn mass planet with
Mcsinic=53.83-8.58+9.18M⊕ and a semimajor axis of
1.43±0.06au. We jointly analyzed radial velocity data from
Keck/HIRES and the Automated Planet Finder at Lick Observatory, as
well as photometric data from KELT, to detect the two planets and two
additional signals related to the rotationally modulated activity and
the long-term magnetic activity cycle of the star. The outer planet in
this system may be a potential candidate for future direct-imaging
missions.
Description:
We collected 130 Radial Velocity (RV) measurements between 1997
January 14 and 2020 July 11 using the High Resolution Echelle
Spectrometer (HIRES) instrument on the Keck I telescope. This star was
observed using the 0.86"x3.5" and 0.86"x14" slits for a spectral
resolution of R∼65000 near 5500Å.
We collected 376 RV measurements between 2013 October 23 and 2020
April 16 using the Levy spectrograph on the Automated Planet Finder
(APF) telescope. We used the 1"x3" slit for a spectral resolution of
R∼100000.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------
11 11 05.17 +30 26 45.7 Gl 414A = HD 97101
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 40 509 Gl 414A radial velocities
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+, 2001-2020)
III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)
J/other/Sci/330.653 : Detected planets in the Eta-Earth Survey (Howard+, 2010)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/ApJ/757/18 : RVel for 16 hot Jupiter host stars (Albrecht+, 2012)
J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)
J/A+A/551/A36 : Metallicity of M dwarfs. III. (Neves+, 2013)
J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)
J/ApJ/830/46 : RVel of 3 Neptune-mass planet hosts (Fulton+, 2016)
J/ApJ/822/97 : Rotation-Activity Correlations K-M dwarfs.I. (Houdebine+,2016)
J/AJ/152/204 : HARPS-N radial velocities of HD 179070 (Lopez-Morales+, 2016)
J/ApJ/834/17 : Mass & radius of planets, moons, low mass stars (Chen+, 2017)
J/AJ/154/226 : Photometry and radial velocities of K2-131 (Dai+, 2017)
J/ApJ/848/34 : CATalog of Stellar Unified Properties (Hinkel+, 2017)
J/ApJ/844/102 : KIC star plxs from asteroseismology vs Gaia (Huber+, 2017)
J/AJ/154/108 : California-Kepler Survey (CKS). II. Properties (Johnson+,2017)
J/AJ/153/21 : Abundances in local region.II. F, G, & K dwarfs (Luck+, 2017)
J/AJ/154/107 : California-Kepler Survey (CKS). I. 1305 stars (Petigura+,2017)
J/ApJ/836/77 : Library of high-S/N optical spectra of FGKM stars (Yee+, 2017)
J/A+A/616/A108 : Cool stars chromospheric activity catalog (Boro Saikia+, 2018)
J/AJ/156/264 : California-Kepler Survey.VII. Planet radius gap (Fulton+,2018)
J/A+A/619/A180 : Gaia DR2 photometric sensitivity curves (Maiz Apellaniz+,2018)
J/AJ/155/255 : RVel and activity measurements of HAT-P-11 (Yee+, 2018)
J/AJ/157/97 : Radial velocity measurements of K2-3 & GJ3470 (Kosiarek+,2019)
J/ApJ/871/63 : How to constrain your M dwarf.II. Nearby binaries (Mann+,2019)
J/A+A/625/A68 : Radii and masses of the CARMENES targets (Schweitzer+, 2019)
J/AJ/159/280 : Gaia-Kepler stellar prop. catalog.I. KIC stars (Berger+, 2020)
J/A+A/642/A115 : CARMENES input catalogue of M dwarfs. V. (Cifuentes+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Inst Instrument code (1)
3- 13 F11.3 d BJD [2450463/2459177] Barycentric Julian Date; TDB
15- 21 F7.3 m/s RVel [-25.7/13.8] Radial velocity
23- 28 F6.3 m/s e_RVel [0.82/21] Uncertainty in RVel
30- 34 F5.3 --- SHK [0/1.31]? Ca II H & K activity index
36- 40 F5.3 --- e_SHK [0.001/0.002]? Uncertainty in SHK
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Note (1): Instruments as follows:
k = pre-upgrade Keck/HIRES (20 occurrences)
j = post-upgrade Keck/HIRES (110 occurrences)
a = Automated Planet Finder telescope (APF; 379 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 12-Apr-2021