J/MNRAS/491/5248 Pan-Pacific Planet Search (PPPS). VIII. (Wittenmyer+, 2020)
The Pan-Pacific Planet Search VIII.
Complete results and the occurrence rate of planets around low-luminosity
giants.
Wittenmyer R.A., Butler R.P., Horner J., Clark J., Tinney C.G.,
Carter B.D., Wang L., Johnson J.A., Collins M.
<Mon. Not. R. Astron. Soc., 491, 5248-5257 (2020)>
=2020MNRAS.491.5248W 2020MNRAS.491.5248W (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets ; Radial velocities ; Spectra, optical
Keywords: techniques: radial velocities - planets and satellites: detection
Abstract:
Our knowledge of the populations and occurrence rates of planets
orbiting evolved intermediate-mass stars lags behind that for
solar-type stars by at least a decade. Some radial velocity surveys
have targeted these low-luminosity giant stars, providing some
insights into the properties of their planetary systems. Here, we
present the final data release of the Pan-Pacific Planet Search
(PPPS), a 5yr radial velocity survey using the 3.9m Anglo-Australian
Telescope. We present 1293 precise radial velocity measurements for
129 stars, and highlight 6 potential substellar-mass companions, which
require additional observations to confirm. Correcting for the
substantial incompleteness in the sample, we estimate the occurrence
rate of giant planets orbiting low-luminosity giant stars to be
approximately 7.8+9.1-3.3 per cent. This result is consistent with
the frequency of such planets found to orbit main-sequence A-type
stars, from which the PPPS stars have evolved.
Description:
We observed the PPPS target stars using the UCLES spectrograph (Diego
et al. 1990SPIE.1235..562D 1990SPIE.1235..562D) on the 3.9m Anglo-Australian Telescope
from 2009 February until 2015 January. UCLES achieved a resolution of
45000 with a 1arcsec slit, and we aimed to achieve a signal-to-noise
ratio (S/N) of 100 at 5500Å per spectral pixel at each epoch,
resulting in exposure times ranging from 100 to 1200s. An iodine
absorption cell provided wavelength calibration from 5000 to 6200Å.
Table A1 gives the complete set of final radial velocities from 105
PPPS targets. Table A2 summarizes the final dispositions of all PPPS
targets, e.g. published companion, candidate, or double-lined binary.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 32 129 Names and positions of the 129 stars with radial
velocity measurements
tablea1.dat 37 1293 Complete AAT radial velocity results
tablea2.dat 108 141 Summary of dispositions for PPPS targets
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Star name (HDNNNNNN or HIPNNNNN)
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 20 F5.2 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 32 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star name (HDNNNNNN or HIPNNNNN)
10- 22 F13.5 d BJD Barycentric Julian Date
24- 32 F9.2 m/s RV Radial velocity
34- 37 F4.2 m/s e_RV Error on RV
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star name (HDNNNNNN or HIPNNNNN)
10- 11 I2 --- Nobs Number of observations for each PPPS
target (1)
13- 43 A31 --- Comments Comments on the target
45-108 A64 --- Ref References
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Note (1): Double-lined binary stars (SB2) cannot be used for radial velocity
determination, and are reported as having zero observations
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History:
From electronic version of the journal
References:
Wittenmyer et al., Paper I 2011ApJ...743..184W 2011ApJ...743..184W, Cat. J/ApJ/743/184
Wittenmyer et al., Paper II 2015ApJ...800...74W 2015ApJ...800...74W
Wittenmyer et al., Paper III 2016MNRAS.455.1398W 2016MNRAS.455.1398W
Wittenmyer et al., Paper IV 2016ApJ...818...35W 2016ApJ...818...35W
Wittenmyer et al., Paper V 2016AJ....152...19W 2016AJ....152...19W, Cat. J/AJ/152/19
Wittenmyer et al., Paper VI 2017AJ....153...51W 2017AJ....153...51W
Wittenmyer et al., Paper VII 2017AJ....154..274W 2017AJ....154..274W
(End) Ana Fiallos [CDS] 22-Feb-2023