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J/A+A/614/A133      Radial velocities of HD215152              (Delisle+, 2018)

The HARPS search for southern extra-solar planets. XLIII. A compact system of four super-earth planets orbiting HD215152. Delisle J.-B., Segransan D., Dumusque X., Diaz R.F., Bouchy F., Lovis C., Pepe F., Udry S., Alonso R., Benz W., Coffinet A., Collier Cameron A., Deleuil M., Figueira P., Gillon M., Lo Curto G., Mayor M., Mordasini C., Motalebi F., Moutou C., Pollacco D., Pompei E., Queloz D., Santos N.C., Wyttenbach A. <Astron. Astrophys. 614, A133 (2018)> =2018A&A...614A.133D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities ; Exoplanets Keywords: planetary systems - planets and satellites: general - planets and satellites: detection - planets and satellites: dynamical evolution and stability Abstract: We report the discovery of four super-earth planets around HD215152, with orbital periods of 5.76, 7.28, 10.86, and 25.2d, and minimum masses of 1.8, 1.7, 2.8, and 2.9MEarth respectively. This discovery is based on 373 high quality radial velocity measurements taken by HARPS over thirteen years. Given the low masses of the planets, the S/N is not sufficient to constrain the planets eccentricities. However, a preliminary dynamical analysis suggests that eccentricities should be typically lower than about 0.03 for the system to remain stable. With two pairs of planets with a period ratio smaller than 1.5, with short orbital periods, small masses, and small eccentricities, HD215152 is similar to the very compact multi-planet systems found by Kepler, and very rare in RV surveys. This discovery proves that those systems are reachable with the RV technique, however they require a huge amount of observations to be characterized. Description: HD215152 radial velocity and log(R'hk) measurements obtained with the HARPS spectrograph installed at the 3.6-m telescope at La Silla observatory. Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 22 43 21.30 -06 24 03.0 HD 215152 = HIP 112190 --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file harps_a.dat 45 284 HARPS measurements of HD215152 taken before the fiber upgrade harps_b.dat 45 89 HARPS measurements of HD215152 taken after the fiber upgrade
Byte-by-byte Description of file: harps_a.dat harps_b.dat
Bytes Format Units Label Explanations
1- 12 F12.6 d BJD Barycentric Julian Date of observation (BJD-2400000) 14- 22 F9.5 km/s RV Radial velocity 24- 30 F7.5 km/s e_RV Radial velocity uncertainty 32- 38 F7.4 --- logRhk Activity indicator based on CaII HK 40- 45 F6.4 --- e_logRhk Uncertainty in the log(R'hk) measurement
Acknowledgements: Jean-Baptiste Delisle, jean-baptiste.delisle(at) References: Pepe et al., Paper I 2004A&A...423..385P Santos et al., Paper II 2004A&A...426L..19S Lovis et al., Paper III 2005A&A...437.1121L Moutou et al., Paper IV 2005A&A...439..367M Udry et al., Paper V 2006A&A...447..361U Bonfils et al., Paper VI 2005A&A...443L..15B Lo Curto et al., Paper VII 2006A&A...451..345L Pepe et al., Paper VIII 2007A&A...462..769P Naef et al., Paper IX 2007A&A...470..721N Bonfils et al., Paper X 2007A&A...474..293B, Cat. J/A+A/474/293 Udry et al., Paper XI 2007A&A...469L..43U, Cat. J/A+A/469/L43 Santos et al., Paper XII 2007A&A...474..647S Mayor et al., Paper XIII 2009A&A...493..639M, Cat. J/A+A/493/639 Forveille et al., Paper XIV 2009A&A...493..645F, Cat. J/A+A/493/645 Moutou et al., Paper XV 2009A&A...496..513M, Cat. J/A+A/496/513 Correia et al., Paper XVI 2009A&A...496..521C, Cat. J/A+A/496/521 Bouchy et al., Paper XVII 2009A&A...496..527B, Cat. J/A+A/496/527 Mayor et al., Paper XVIII 2009A&A...507..487M, Cat. J/A+A/507/487 Correia et al., Paper XIX 2010A&A...511A..21C, Cat. J/A+A/511/A21 Hebrard et al., Paper XX 2010A&A...512A..46H, Cat. J/A+A/512/A46 Santos et al., Paper XXI 2010A&A...512A..47S, Cat. J/A+A/512/A47 Lo Curto et al., Paper XXII 2010A&A...512A..48L, Cat. J/A+A/512/A48 Naef et al., Paper XXIII 2010A&A...523A..15N, Cat. J/A+A/523/A15 Mordasini et al., Paper XXIV 2011A&A...526A.111M, Cat. J/A+A/526/A111 Santos et al., Paper XXV 2011A&A...526A.112S, Cat. J/A+A/526/A112 Forveille et al., Paper XXVI 2011A&A...526A.141F, Cat. J/A+A/526/A141 Moutou et al., Paper XXVII 2011A&A...527A..63M, Cat. J/A+A/527/A63 Lovis et al., Paper XXVIII 2011A&A...528A.112L, Cat. J/A+A/528/A112 Segransan et al., Paper XXIX 2011A&A...535A..54S Dumusque et al., Paper XXX 2011A&A...535A..55D, Cat. J/A+A/535/A55 Bonfils et al., Paper XXXI 2013A&A...549A.109B Lo Curto et al., Paper XXXII 2013A&A...551A..59L, Cat. J/A+A/551/A59 Delfosse et al., Paper XXXIII 2013A&A...553A...8D Bonfils et al., Paper XXXIV 2013A&A...556A.110B, Cat. J/A+A/556/A110 Santos et al., Paper XXXV 2014A&A...566A..35S, Cat. J/A+A/566/A35 Astudillo-Defru et al., Paper XXXVI 2015A&A...575A.119A, Cat. J/A+A/575/A119 Moutou et al., Paper XXXVII 2015A&A...576A..48M, Cat. J/A+A/576/A48 Diaz et al., Paper XXXVIII 2016A&A...585A.134D, Cat. J/A+A/585/A134 Mortier et al., Paper XXXIX 2016A&A...585A.135M, Cat. J/A+A/585/A135 Faria et al., Paper XL 2016A&A...589A..25F Astudillo-Defru et al. Paper XLI 2017A&A...602A..88A, Cat. J/A+A/602/A88 Astudillo-Defru et al., Paper XLII 2017A&A...605L..11A, Cat. J/A+A/605/L11
(End) J.-B. Delisle [UNIGE, Switzerland], P. Vannier [CDS] 12-Feb-2018
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