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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
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). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 61 15 Studied stars list tables.dat 48 598 Radial velocities of 15 stars
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
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
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)
Note (1): Spectrograph configuration code as follows: C07 = CORALIE-07 (upgraded CORALIE spectrograph, July 2007) C98 = CORALIE-98 (original CORALIE spectrograph) HARPS = HARPS
Acknowledgements: Johannes Sahlmann, Johannes.Sahlmann(at)unige.ch References: Queloz et al., Paper I 2000A&A...354...99Q Udry et al., Paper II 2000A&A...356..590U, Cat. J/A+A/356/590 Santos et al., Paper III 2000A&A...356..599S Santos et al., Paper IV 2000A&A...361..265S Santos et al., Paper V 2001A&A...375..205S, Cat. J/A+A/375/205 Santos et al., Paper VI 2001A&A...379..999S, Cat. J/A+A/379/999 Pepe et al., Paper VII 2002A&A...388..632P, Cat. J/A+A/388/632 Udry et al., Paper VIII 2002A&A...390..267U, Cat. J/A+A/390/267 Santos et al., Paper IX 2002A&A...392..215S, Cat. J/A+A/392/215 Udry et al., Paper X 2003A&A...407..679U Santos et al., Paper XI 2003A&A...406..373S, Cat. J/A+A/406/373 Mayor et al., Paper XII 2004A&A...415..391M, Cat. J/A+A/415/391 Correia et al., Paper XIII 2005A&A...440..751C Eggenberger et al., Paper XIV 2006A&A...447.1159E, Cat. J/A+A/447/1159 Tamuz et al., Paper XV 2008A&A...480L..33T, Cat. J/A+A/480/L33 Segransan et al., Paper XVI 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
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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