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J/ApJ/697/544      Planets orbiting metal-poor dwarfs. II.     (Sozzetti+, 2009)

A Keck HIRES Doppler search for planets orbiting metal-poor dwarfs. II. On the frequency of giant planets in the metal-poor regime. Sozzetti A., Torres G., Latham D.W., Stefanik R.P., Korzennik S.G., Boss A.P., Carney B.W., Laird J.B. <Astrophys. J., 697, 544-556 (2009)> =2009ApJ...697..544S
ADC_Keywords: Stars, metal-deficient ; Radial velocities ; Abundances, [Fe/H] ; Spectroscopy ; Planets Keywords: planetary systems: formation - stars: abundances - stars: statistics - techniques: radial velocities Abstract: We present an analysis of three years of precision radial velocity (RV) measurements of 160 metal-poor stars observed with HIRES on the Keck 1 telescope. We report on variability and long-term velocity trends for each star in our sample. We identify several long-term, low-amplitude RV variables worthy of followup with direct imaging techniques. We place lower limits on the detectable companion mass as a function of orbital period. Our survey would have detected, with a 99.5% confidence level, over 95% of all companions on low-eccentricity orbits with velocity semiamplitude K≳100m/s, or Mpsini≳3.0MJ(P/yr)(1/3), for orbital periods P≲3yr. None of the stars in our sample exhibits RV variations compatible with the presence of Jovian planets with periods shorter than the survey duration. Description: Table 1 lists 160 metal-deficient stars observed at least twice during our three-year long observing campaign with HIRES on the Keck 1 telescope in 2003-2005. About 10% of the targets in Table 1 are also in the list of southern metal-poor stars observed with HARPS (Mayor et al. 2003Msngr.114...20M). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 91 160 Target list of the Keck HIRES metal-poor planet survey table2.dat 31 160 Radial-velocity results for all stars table3.dat 57 160 Variability analysis for the sample table4.dat 72 153 Test for long-term trends table5.dat 36 766 Radial velocity measurements for stars with σrmsint≲3.0 table6.dat 36 52 Radial velocity measurements for stars with linear trends table7.dat 36 21 Radial velocity measurements for stars with non-linear trends
See also: J/A+A/526/A112 : Radial velocities of HARPS metal-poor sample (Santos+, 2011) J/A+A/527/A63 : Radial velocities of 7 new HARPS planetary systems (Moutou+, 2011) J/A+A/523/A15 : HARPS XXIII: RV data for the 8 targets (Naef+, 2010) J/A+A/524/A25 : Radial Velocities on 6 exoplanet host stars (Triaud+, 2010) J/A+A/512/A47 : Radial velocities of 3 stars with giant planets (Santos+, 2010) J/A+A/496/513 : RV of 6 stars with long-period giant planets (Moutou+, 2009) J/ApJ/652/1585 : Bright metal-poor stars from HES survey (Frebel+, 2006) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star Name 12- 21 A10 --- AName Alternative name; HD/HIP 23- 24 I2 h RAh Hour of Right Ascension (J2000) 26- 27 I2 min RAm Minute of Right Ascension (J2000) 29- 33 F5.2 s RAs Second of Right Ascension (J2000) 35 A1 --- DE- Sign of the Declination (J2000) 36- 37 I2 deg DEd Degree of Declination (J2000) 39- 40 I2 arcmin DEm Arcminute of Declination (J2000) 42- 45 F4.1 arcsec DEs Arcsecond of Declination (J2000) 47- 51 F5.2 mag Vmag The visual magnitude 53- 56 I4 K Teff Effective temperature 58- 62 F5.2 [Sun] [Fe/H] Metallicity 64- 67 F4.2 Msun Mass Mass of star 69- 72 F4.2 mag B-V The (B-V) color index 74- 77 F4.2 mag V-K The (V-K) color index 79- 82 F4.2 [cm/s2] log(g) Log of the surface gravity 84- 86 I3 pc Dph ? Photometric distance estimate 88- 91 I4 pc Dhip ? Hipparcos parallax distance
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star name (1) 12- 13 I2 --- N Total number of spectra collected 15- 19 F5.1 m/s sig-rms Total radial velocity scatter 21- 24 F4.1 m/s sig-int Average internal measurement error 26- 31 F6.1 d DelT Time-span of the observations
Note (1): Radial-velocity results for all stars observed at least twice during the survey.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star name 12- 13 I2 --- N Total number of spectra collected 15- 20 F6.3 --- Ratio Ratio of σrms to σint 22- 33 E12.6 --- P(chi2) χ2-test probability (2) 35- 45 E11.5 --- P(Ku) ? Kuper's Ku-test probability (2) 47- 57 E11.5 --- P(F) F-test probability (2)
Note (2): false alarm probability of velocity variation: a probability less than 0.005 means the velocity is variable (at a 99.5% confidence level)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star name 12- 13 I2 --- N Total number of spectra collected 15- 19 F5.2 --- Ratio Ratio of (σrms to σint)_constant 21- 27 F7.2 m/s/yr Slope Slope 29- 34 F6.2 m/s/yr e_Slope Uncertainty in Slope 36- 41 F6.1 --- F-test F-test 43- 53 E11.5 --- P(F) F-test probability of non-significant slope 55- 60 F6.3 --- Lin Ratio of (σrms to σint)_linear 62- 72 E11.5 --- P(chi2) The χ2-test probability on post-fit residuals (slope taken into account)
Byte-by-byte Description of file: table[567].dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star identification 12- 24 F13.5 d BJD Baricentric Julian Date 26- 31 F6.1 m/s HRV Heliocentric radial velocity 33- 36 F4.1 m/s e_HRV The 1σ uncertainty in HRV
History: * 30-May-2011: From electronic version of the journal * 10-Jul-2011: in tables 4-7, the following Names have been corrected to match the star names in tables 1-3: G 142-2 corrected into G 142-21 G 169-5 corrected into G 169-45 References: Sozzetti et al. Paper I. 2006ApJ...649..428S
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 30-May-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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