J/A+A/415/1153 [Fe/H] for 98 extra-solar planet-host stars (Santos+, 2004)
Spectroscopic [Fe/H] for 98 extra-solar planet-host stars.
Exploring the probability of planet formation.
Santos N.C., Israelian G., Mayor M.
<Astron. Astrophys. 415, 1153 (2004)>
=2004A&A...415.1153S 2004A&A...415.1153S
ADC_Keywords: Planets ; Abundances, [Fe/H] ; Stars, masses ;
Effective temperatures
Keywords: stars: abundances - stars: fundamental parameters -
stars: planetary systems - stars: planetary systems: formation -
stars: chemically peculiar
Abstract:
We present stellar parameters and metallicities, obtained from a
detailed spectroscopic analysis, for a large sample of 98 stars known
to be orbited by planetary mass companions (almost all known targets),
as well as for a volume-limited sample of 41 stars not known to host
any planet. For most of the stars the stellar parameters are revised
versions of the ones presented in our previous work. However, we also
present parameters for 18 stars with planets not previously published,
and a compilation of stellar parameters for the remaining 4
planet-hosts for which we could not obtain a spectrum. A comparison of
our stellar parameters with values of Teff, logg, and [Fe/H]
available in the literature shows a remarkable agreement. In
particular, our spectroscopic logg values are now very close to
trigonometric logg estimates based on Hipparcos parallaxes. The
derived [Fe/H] values are then used to confirm the previously known
result that planets are more prevalent around metal-rich stars.
Description:
Most of the spectra for the planet-host stars analyzed in this paper
were studied in Papers I (Santos et al., 2000A&A...363..228S 2000A&A...363..228S),
II (Santos et al., 2001A&A...373.1019S 2001A&A...373.1019S), and III (Santos et al.,
2003, Cat. J/A+A/398/363. We refer the reader to these for a
description of the data.
During the last year, however, we have obtained spectra for 18 more
planet host stars. Most of the spectra were gathered using the FEROS
spectrograph (2.2-m ESO/MPI telescope, La Silla, Chile), on the night
of the 12-13 March 2003 (for HD47536, HD65216, HD72659, HD73256,
HD73526, HD76700, HD111232, and HD142415) and with the SARG
spectrograph at the TNG telescope (La Palma, Spain) on the nights of
the 9-10 October 2003 (for HD3651, HD40979, HD68988, HD216770,
HD219542B, and HD222404). In these runs we have also gathered spectra
for HD30177, HD162020 (FEROS), and HD178911B (SARG), already
previously analyzed.
Finally, a spectrum of HD70642 with a S/N∼150 was obtained using the
CORALIE spectrograph (R=50000), at the 1.2-m Euler Swiss telescope
(La Silla, Chile), on the night of the 21-22 October 2003.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 83 43 Stars with planets and derived stellar
parameters (HD number between 1 and 60000)
table3.dat 83 40 Stars with planets and derived stellar
parameters (HD number from 60000 to 160000)
table4.dat 83 38 Stars with planets and derived stellar
parameters (HD number from 160000 on)
table5.dat 83 41 List of 41 stars from our comparison sample
and derived stellar parameters
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See also:
J/A+A/398/363 : Statistical properties of exoplanets II (Santos+, 2003)
http://obswww.unige.ch/Exoplanets : The Geneva Extrasolar Planet Search
Programmes HomePage
Byte-by-byte Description of file: table?.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- cmp [c] Comparison sample (in table5 only)
3- 4 A2 --- --- [HD]
6- 11 I6 --- HD HD number
12 A1 --- m_HD Multiplicity index on HD
13 A1 --- n_HD [bc] Note on HD (1)
15- 18 I4 K Teff Effective temperature
20- 22 I3 K e_Teff ? rms uncertainty on Teff
24- 27 F4.2 [cm/s2] logg Spectroscopic surface gravity
29- 32 F4.2 [cm/s2] e_logg ? rms uncertainty on logg
34- 37 F4.2 km/s Vt Microturbulence
39- 42 F4.2 km/s e_Vt ? rms uncertainty on Vt
44- 48 F5.2 [Sun] [Fe/H] Derived metallicity
50- 53 F4.2 [Sun] e_[Fe/H] ? rms uncertainty on [Fe/H]
55- 56 I2 --- N(FeI) ? Number of FeI lines used in the analysis
57 A1 --- --- [,]
59 I1 --- N(FeII) ? Number of FeII lines used in the analysis
61- 64 F4.2 --- e_N(FeI) ? rms around the mean [FeI/H] values
65 A1 --- --- [,]
67- 70 F4.2 --- e_N(FeII) ? rms around the mean [FeII/H] values
72- 74 A3 --- Inst Instrument, or avg for averaged values (2)
76- 79 F4.2 solMass Mass ? Stellar mass
81- 84 F4.2 [cm/s2] loggHIP ? Surface gravity based on Hipparcos
parallax (trigonometric gravity)
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Note (1): Notes:
b: The companions to these stars have minimum masses above 10MJup,
and are thus probably brown-dwarfs.
c: These parameters, derived from a Keck/HIRES spectrum, were
computed with a reduced number of iron lines. In the rest of the
paper, only the parameters derived from the SARG/TNG spectrum
were considered
Note (2): The instruments used to obtain the spectra were:
[1] 1.2-m Swiss Telescope/CORALIE
[2] 1.5-m and 2.2-m ESO/FEROS
[3] WHT/UES
[4] TNG/SARG
[5] VLT-UT2/UVES
[6] 1.93-m OHP/ELODIE
[7] Keck/HIRES
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History:
From electronic version of the journal
References:
Santos et al., Paper I 2000A&A...363..228S 2000A&A...363..228S
Santos et al., Paper II 2001A&A...373.1019S 2001A&A...373.1019S
Santos et al., Paper III 2003A&A...398..363S 2003A&A...398..363S, Cat. J/A+A/398/363
(End) Patricia Bauer [CDS] 19-Feb-2004