J/A+A/525/A95 Search for brown-dwarf companions of stars (Sahlmann+, 2011)
Search for brown-dwarf companions of stars.
Sahlmann J., Segransan D., Queloz D., Udry S., Santos N.C., Marmier M.,
Mayor M., Naef D., Pepe F., Zucker S.
<Astron. Astrophys. 525, A95 (2011)>
=2011A&A...525A..95S 2011A&A...525A..95S
ADC_Keywords: Binaries, spectroscopic ; Radial velocities
Keywords: binaries: spectroscopic - brown dwarfs - stars: low-mass -
techniques: radial velocities - astrometry
Abstract:
The discovery of 9 new brown-dwarf candidates is reported. New CORALIE
radial velocities of 6 previously-known hosts of potential brown-dwarf
companions are presented. We use Hipparcos data to fully characterise
the astrometric orbits of 6 objects, revealing M-dwarf companions with
masses between 90MJup and 0.52M☉. We obtain an upper limit of
0.6% for the frequency of brown-dwarf companions around Sun-like
stars. We find that the companion-mass distribution function is rising
at the lower end of the brown-dwarf mass range, suggesting that in
fact we detect the high-mass tail of the planetary distribution.
Description:
Spectroscopic data used in this publication: precise radial
velocities. The data are plotted in Fig.2, Fig.3, Fig.4, and Fig.5.
Two spectrographs were used: CORALIE and HARPS. The CORALIE Echelle
spectrograph was upgraded in July 2007 which affected the instrument
zero point. We decided to refer to the original CORALIE as CORALIE-98
and to the upgraded one as CORALIE-07. When using both set of data,
the instrumental zero point should be adjusted. Instrument used as
follows: C98 = CORALIE-98 and C07 = CORALIE-07 as designated by
Segransan et al. (2010A&A...511A..45S 2010A&A...511A..45S).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 15 Studied stars list
tables.dat 48 598 Radial velocities of 15 stars
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See also:
J/A+A/356/590 : CORALIE survey for extrasolar planets. II (Udry+, 2000)
J/A+A/375/205 : CORALIE survey for extrasolar planets. V (Naef+ 2001)
J/A+A/379/999 : CORALIE survey for extrasolar planets. VI (Santos+ 2001)
J/A+A/388/632 : CORALIE survey for extrasolar planets. VII (Pepe+, 2002)
J/A+A/390/267 : CORALIE survey for extrasolar planets. VIII (Udry+, 2002)
J/A+A/392/215 : CORALIE survey for extrasolar planets. IX (Santos+ 2002)
J/A+A/406/373 : CORALIE survey for extrasolar planets. XI (Santos+, 2003)
J/A+A/415/391 : 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 : CORALIE survey for extrasolar planets. XV (Tamuz+ 2008)
J/A+A/511/A45 : HD147018, 171238 & 204313 radial velocities (Segransan+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name (HD or HIP number)
11- 16 I6 --- HIP Hipparcos number (Cat. I/311)
18- 21 A4 --- SpT MK spectral type
24- 28 F5.2 mag Vmag Johnson V magnitude
30- 34 F5.2 mag B-V (B-V) color index
36- 40 F5.1 mas plx Trigonometric parallax
42- 44 F3.1 mas e_plx Mean error on plx
46- 55 F10.4 d Per Best orbital period (from table3)
57- 61 F5.3 --- e Best eccentricity
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Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 24 F14.6 d JD Julian Date
26- 34 F9.5 km/s RV Radial velocity
36- 42 F7.5 km/s e_RV Radial velocity error
44- 48 A5 --- Inst Spectrograph configuration used (1)
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Note (1): Spectrograph configuration code as follows:
C07 = CORALIE-07 (upgraded CORALIE spectrograph, July 2007)
C98 = CORALIE-98 (original CORALIE spectrograph)
HARPS = HARPS
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Acknowledgements:
Johannes Sahlmann, Johannes.Sahlmann(at)unige.ch
References:
Queloz et al., Paper I 2000A&A...354...99Q 2000A&A...354...99Q
Udry 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
Santos et al., Paper V 2001A&A...375..205S 2001A&A...375..205S, 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, Cat. J/A+A/388/632
Udry 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
Segransan et al., Paper XVI 2010A&A...511A..45S 2010A&A...511A..45S, Cat. J/A+A/511/A45
History:
* 03-Dec-2010: on-line version of the tables
* 23-Apr-2014: some values corrected for HD 52756 and HD 53680 in table1
(from author)
(End) Patricia Vannier [CDS] 19-Oct-2010