J/A+A/390/267 The CORALIE survey for extrasolar planets VIII (Udry+, 2002)
The CORALIE survey for southern extra-solar planets.
VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and
HD 202206 : Brown dwarfs or "superplanets"?
Udry S., Mayor M., Naef D., Pepe F., Queloz D., Santos N.C., Burnet M.
<Astron. Astrophys. 390, 267 (2002)>
=2002A&A...390..267U 2002A&A...390..267U
ADC_Keywords: Binaries, spectroscopic ; Planets ; Radial velocities
Keywords: techniques: radial velocities - stars: binaries: spectroscopic -
stars: individual: HD 141937 - stars: individual: HD 162020 -
stars: individual: HD 168443 - stars: individual: HD 202206
Abstract:
Doppler CORALIE measurements of the solar-type stars HD 141937,
HD 162020, HD 168443 and HD 202206 show Keplerian radial-velocity
variations revealing the presence of 4 new companions with minimum
masses close to the planet/brown-dwarf transition, namely with
m2sini=9.7, 14.4, 16.9, and 17.5MJup, respectively. The orbits
present fairly large eccentricities (0.22≤e≤0.43). Except for HD
162020 , the parent stars are metal rich compared to the Sun, as are
most of the detected extra-solar planet hosts. Considerations of tidal
dissipation in the short-period HD 162020 system points towards a
brown-dwarf nature for the low-mass companion. HD 168443 is a multiple
system with two low-mass companions being either brown dwarfs or
formed simultaneously in the protoplanetary disks as superplanets. For
HD 202206, the radial velocities show an additional drift revealing a
further outer companion, the nature of which is still unknown.
Finally, the stellar-host and orbital properties of massive planets
are examined in comparison to lighter exoplanets. Observed trends
include the need of metal-rich stars to form massive exoplanets and
the lack of short periods for massive planets. If confirmed with
improved statistics, these features may provide constraints for the
migration scenario.
Objects:
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RA (2000) DE Designation(s) (File)
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15 52 17.5 -18 26 10 HD 141937 (hd141937.dat)
17 50 38.4 -40 19 06 HD 162020 (hd162020.dat)
18 20 03.9 -09 35 45 HD 168443 (hd168443.dat)
21 14 57.8 -20 47 21 HD 202206 (hd202206.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hd141937.dat 31 81 HD 141937 radial velocity curve
hd162020.dat 31 46 HD 162020 radial velocity curve
hd168443.dat 31 72 HD 168443 radial velocity curve
hd202206.dat 31 95 HD 202206 radial velocity curve
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See also:
J/A+A/356/590 : The CORALIE survey for extrasolar planets. II (Udry+, 2000)
J/A+A/375/205 : The CORALIE survey for extrasolar planets. V (Naef+ 2001)
J/A+A/379/999 : The CORALIE survey for extrasolar planets. VI (Santos+ 2001)
J/A+A/388/632 : The CORALIE survey for extrasolar planets. VII (Pepe+, 2002)
J/A+A/392/215 : The CORALIE survey for extrasolar planets. IX (Santos+ 2002)
J/A+A/406/373 : The CORALIE survey for extrasolar planets. XI (Santos+, 2003)
J/A+A/415/391 : The CORALIE survey for extrasolar planets. XII (Mayor+, 2004)
J/A+A/447/1159 : CORALIE survey for extrasolar planets. XIV (Eggenberger+ 2006)
J/A+A/480/L33 : The CORALIE survey for extrasolar planets. XV (Tamuz+, 2008)
J/A+A/375/L27 : HD80606b a planet on an extremely elongated orbit (Naef+ 2001)
J/A+A/410/1039 : Northern extra-solar planets ELODIE survey I (Perrier+ 2003)
J/A+A/410/1051 : Northern extra-solar planets ELODIE survey II (Naef+ 2003)
J/A+A/414/351 : Northern extra-solar planets ELODIE survey III (Naef+, 2004)
Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian date
17- 24 F8.4 km/s RV Radial velocity
26- 30 F5.3 km/s e_RV rms uncertainty on RV
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Acknowledgements: Stephane Udry
References:
Queloz et al., Paper I 2000A&A...354...99Q 2000A&A...354...99Q
Udy et al., Paper II 2000A&A...356..590U 2000A&A...356..590U, Cat. J/A+A/356/590
Santos et al., Paper III 2000A&A...356..599S 2000A&A...356..599S
Santos et al., Paper IV 2000A&A...361..265S 2000A&A...361..265S
Naef et al., Paper V 2001A&A...375..205N 2001A&A...375..205N, Cat. J/A+A/375/205
Santos et al., Paper VI 2001A&A...379..999S 2001A&A...379..999S, Cat. J/A+A/379/999
Pepe et al., Paper VII 2002A&A...388..632P 2002A&A...388..632P
Udy et al., Paper VIII 2002A&A...390..267U 2002A&A...390..267U, Cat. J/A+A/390/267
Santos et al., Paper IX 2002A&A...392..215S 2002A&A...392..215S, Cat. J/A+A/392/215
Udry et al., Paper X 2003A&A...407..679U 2003A&A...407..679U
Santos et al., Paper XI 2003A&A...406..373S 2003A&A...406..373S, Cat. J/A+A/406/373
Mayor et al., Paper XII 2004A&A...415..391M 2004A&A...415..391M, Cat. J/A+A/415/391
Correia et al., Paper XIII 2005A&A...440..751C 2005A&A...440..751C
Eggenberger et al., Paper XIV 2006A&A...447.1159E 2006A&A...447.1159E, Cat. J/A+A/447/1159
Tamuz et al., Paper XV 2008A&A...480L..33T 2008A&A...480L..33T, Cat. J/A+A/480/L33
(End) Patricia Bauer [CDS] 16-Jul-2002