J/AJ/162/176 The solar neighborhood. XLVIII. (Paredes+, 2021)
The solar neighborhood
XLVIII. Nine giant planets orbiting nearby K dwarfs, and the CHIRON
Spectrograph's radial velocity performance.
Paredes L.A., Henry T.J., Quinn S.N., Gies D.R., Hinojosa-goni R.,
James H.-S., Jao W.-C., White R.J.
<Astron. J., 162, 176-176 (2021)>
=2021AJ....162..176P 2021AJ....162..176P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, dwarfs; Stars, K-type; Exoplanets; Spectra, optical;
Radial velocities
Keywords: Astronomical techniques; Extrasolar gaseous giant planets
Radial velocity; Solar neighborhood; Surveys
Abstract:
We report initial results of a large radial velocity survey of K
dwarfs up to a distance of 50pc from the solar system, to look for
stellar, brown dwarf, and Jovian planets using radial velocities from
the CHIRON spectrograph on the CTIO/SMARTS 1.5m telescope. We identify
three new exoplanet candidates orbiting host stars in the K dwarf
survey and confirm a hot Jupiter from TESS orbiting TOI129. Our
techniques are confirmed via five additional known exoplanet orbiting
K dwarfs, bringing the number of orbital solutions presented here to
9, each hosting an exoplanet candidate with a minimum mass of
0.5-3.0MJup. In addition, we provide a list of 186 nearby K dwarfs
with no detected close companions that are ideal for more sensitive
searches for lower-mass planets. This set of stars is used to
determine CHIRON's efficiency, stability, and performance for radial
velocity work. For K dwarfs with V=7-12, we reach radial velocity
precisions of 5-20m/s under a wide range of observing conditions. We
demonstrate the stability of CHIRON over hours, weeks, and years using
radial velocity standards, and describe instrumental capabilities and
operation modes available for potential users.
Description:
The Cerro Tololo Inter-American Observatory Small and Moderate
Aperture Research Telescope System (CTIO/SMARTS) 1.5m telescope has
been operated by the SMARTS Consortium (Subasavage et al. 2010) since
2003. The 1.5m has had a few different instruments available since
SMARTS began, but the primary instrument over the past decade, and the
only one operating since 2015, is the CHIRON high-resolution
spectrograph (415 to 880nm).
The K dwarfs are being observed with CHIRON in slicer mode, which
provides a resolution of 80000 and spreads the spectrum into 59
orders.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 105 15 Orbital parameters of exoplanet candidates
tablea1.dat 36 214 CHIRON radial velocities of K-dwarf radial
velocity standards
tablea2.dat 35 240 CHIRON radial velocities of known and new
planet candidates
tablea3.dat 83 198 Sample of 198 K dwarfs with RV curves
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
B/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
V/122 : SB9: 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2005)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)
J/A+A/546/A69 : Orbits of visual binaries and dynamical masses (Malkov+, 2012)
J/AJ/147/87 : From binaries multiples. II. Statistical data (Tokovinin, 2014)
J/ApJ/799/4 : Robo-AO observations of binary stars (Riddle+, 2015)
J/AJ/153/208 : LCES HIRES/Keck radialvelocity Exoplanet Survey (Butler+, 2017)
J/AJ/153/257 : Comoving stars in Gaia DR1 (Oh+, 2017)
J/AJ/155/265 : The solar neighborhood. XLIV. RECONS discoveries (Henry+, 2018)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Statut Statut; Previously known, TESS, or New candidate
7- 16 A10 --- HIP HIP identifier
18- 21 F4.2 Msun Mass [0.62/0.93] Stellar mass
23- 29 F7.3 d Per [0.98/160] Period
31- 36 F6.4 d e_Per [0.0005/2.93]? Negative error on Per
38- 43 F6.4 d E_Per [0.0004/2.68]? Positive error on Per
45- 48 F4.2 MJup msini [0.48/3.21] Mass compared to Jupiter
50 A1 --- f_e [<] Flag on e
52- 56 F5.3 --- e [0/0.31] Eccentricity
58- 63 F6.2 deg omega [0/292]? Argument of perihelion (ω)
65- 69 F5.1 m/s RVel [41.1/754] Radial velocity amplitude
71- 74 F4.1 m/s e_RVel [2.2/19.6]? Negative error on RVel
76- 79 F4.1 m/s E_RVel [2.1/34.5]? Positive error on RVel
81- 85 F5.3 au a [0.01/0.5] Semi-major axis
87- 94 F8.3 d JD [1287/8369]? Date of observation; JD-2450000
96- 99 F4.1 m/s RMS [9.9/26.1]? Velocity RMS
101-103 I3 --- Data [9/182] Data points
105 I1 --- Ref [1/7] References used (1)
--------------------------------------------------------------------------------
Note (1): References as follows:
1 = This work
2 = Moutou+, 2005A&A...439..367M 2005A&A...439..367M
3 = Ge+, 2006ApJ...648..683G 2006ApJ...648..683G
4 = Udry+, 2000, J/A+A/356/590
5 = Bouchy+, 2005A&A...444L..15B 2005A&A...444L..15B
6 = Santos+, 2003, J/A+A/406/373
7 = Nielsen+, 2020A&A...639A..76N 2020A&A...639A..76N
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Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- HIP HIP identifier
12 A1 --- f_HIP [*] Flag marks HP073184 within a night
14- 23 F10.5 d BJD [7929/8831] Barycentric Julian Date; BJD-2450000
25 A1 --- f_BJD [*] Flag marks the reference epoch
27- 31 F5.1 m/s RVel [-49.1/50.7] Radial velocity
33- 36 F4.1 m/s e_RVel [0.1/19.6] Error on radial velocity
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Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- HIP HIP identifier
12- 21 F10.5 d BJD [7928/8862] Barycentric Julian Date; BJD-2450000
23 A1 --- f_BJD [*] Flag marks the reference epoch
25- 30 F6.1 m/s RVel [-738/759] Radial velocity
32- 35 F4.1 m/s e_RVel [2.2/39.2] Error on radial velocity
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Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Statut RVel standard, kown planet, new planet candidates,
or flat RVel curves
6- 15 A10 --- HIP HIP identifier
17- 18 I2 h RAh Hour of right ascension (J2000)
20- 21 I2 min RAm Minute of right ascension (J2000)
23- 28 F6.3 s RAs Second of right ascension (J2000)
30 A1 --- DE- [±] Sign of declination (J2000)
32- 33 I2 deg DEd Degree of declination (J2000)
35- 36 I2 arcmin DEm Arcminute of declination (J2000)
38- 42 F5.2 arcsec DEs Arcsecond of declination (J2000)
44- 49 F6.2 mas plx [18.2/172] Parallax
51- 55 F5.2 mag Vmag [5.75/11.4] V-band magnitude
57- 60 F4.2 mag Kmag [3.8/8.29]? K-band magnitude
62- 65 F4.2 mag V-K [1.81/3.74]? V-K color
67- 70 F4.2 mag VMAG [5.53/8.92] V-band absolute magnitude
72- 76 F5.1 m/s RVel [4.5/431] RVel median absolute deviation
78- 79 I2 --- NObs [3/77] Number of observations
81- 83 I3 d Span [2/896] Time span
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History:
From electronic version of the journal
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(End) Prepared by Coralie Fix [CDS], 21-Jan-2022