2015A&A...581L...6D

Query : 2015A&A...581L...6D

2015A&A...581L...6D - Astronomy and Astrophysics, volume 581L6-6 (2015/9-1)

The GAPS programme with HARPS-N at TNG. IX. The multi-planet system KELT-6: Detection of the planet KELT-6c and measurement of the Rossiter-McLaughlin effect for KELT-6b.

DAMASSO M., ESPOSITO M., NASCIMBENI V., DESIDERA S., BONOMO A.S., BIERYLA A., MALAVOLTA L., BIAZZO K., SOZZETTI A., COVINO E., LATHAM D.W., GANDOLFI D., RAINER M., PETROVICH C., COLLINS K.A., BOCCATO C., CLAUDI R.U., COSENTINO R., GRATTON R., LANZA A.F., MAGGIO A., MICELA G., MOLINARI E., PAGANO I., PIOTTO G., PORETTI E., SMAREGLIA R., DI FABRIZIO L., GIACOBBE P., GOMEZ-JIMENEZ M., MURABITO S., MOLINARO M., AFFER L., BARBIERI M., BEDIN L.R., BENATTI S., BORSA F., MALDONADO J., MANCINI L., SCANDARIATO G., SOUTHWORTH J. and ZANMAR SANCHEZ R.

Abstract (from CDS):

For more than 1.5 years we spectroscopically monitored the star KELT-6 (BD+312447), which is known to host the transiting hot-Saturn KELT-6b, because a previously observed long-term trend in radial velocity time series suggested that there is an outer companion. We collected a total of 93 new spectra with the HARPS-N and TRES spectrographs. A spectroscopic transit of KELT-6b was observed with HARPS-N, and simultaneous photometry was obtained with the IAC-80 telescope. We proved the existence of an outer planet with a mininum mass Mpsini=3.71±0.21 MJup and a moderately eccentric orbit (e=0.21–0.036+0.039) of period P∼3.5 years. We improved the orbital solution of KELT-6b and obtained the first measurement of the Rossiter-McLaughlin effect, showing that the planet has a likely circular, prograde, and slightly misaligned orbit with a projected spin-orbit angle of λ=-36±11 degrees. We improved the KELT-6b transit ephemeris from photometry and provide new measurements of the stellar parameters. KELT-6 appears as an interesting case for studying the formation and evolution of multi-planet systems.

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Journal keyword(s): stars: individual: KELT-6 - planetary systems - techniques: radial velocities - techniques: photometric

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 149 2
2 UCAC4 604-049448 * 13 03 29.3669577624 +30 44 16.331940240   13.46 12.83 12.76   ~ 1 0
3 TYC 2532-208-1 * 13 03 30.6449057880 +30 39 55.284088680   12.59 12.53 12.48   G 2 0
4 TYC 2532-979-1 * 13 03 30.6758696176 +30 36 07.566371954   11.83 10.77 11.09   G3 6 0
5 UCAC4 604-049454 * 13 03 45.1789119624 +30 38 17.837123928   14.78 13.86 13.71   ~ 1 0
6 BD+31 2447 Em* 13 03 55.6466582304 +30 38 24.278530344   10.837 10.337   9.745 F8 61 1
7 BD+31 2447c Pl 13 03 55.6466582304 +30 38 24.278530344           ~ 10 0
8 BD+31 2447b Pl 13 03 55.6466582304 +30 38 24.278530344           ~ 47 1
9 HAT-P-17 PM* 21 38 08.7310010424 +30 29 19.446386748   11.33 10.38 10.24   G0 85 1
10 CD-35 16019 PM* 23 59 36.0711872328 -35 01 52.923618408   10.49 9.87 9.91   G6 139 0

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