UCAC4 604-049448 , the SIMBAD biblio

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

Abstract Copyright: ∼

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

Simbad objects: 10

goto View the references in ADS