HD 43691 forms a widely separated (a = 383 AUs) binary system with an M dwarf companion which in turn could be binary with approximate separation of 6.8 AUs (Ginski et al. 2016).
WRIGHT J., MARCY G. & the California Planet Survey consortium
web page
How eccentric orbital solutions can hide planetary systems in 2:1 resonant orbits
ANGLADA-ESCUDE G., LOPEZ-MORALES M. & CHAMBERS J.
ApJ.
, 709
, 168
paper
Planets and Debris Disks: Results from a Spitzer/MIPS Search for Infrared Excess
BRYDEN G., BEICHMAN C., CARPENTER J., RIEKE G., STAPELFELDT K., WERNER M., TANNER A., LAWLER S., WYATT M., TRILLING D., SU K., BLAYLOCK M. & STANSBERRY J.
ApJ.
, 705
, 1226
paper
Abundance Stratification of Exoplanet Host Stars
SAFFE C., LEVATO H., LOPEZ-GARCIA Z., JOFRE E., PETRUCCI R. & GONZALEZ E.
Astron. & Astrophys.
preprint
Extrasolar Giant Planets and X-ray Activity
KASHYAP V., DRAKE J. & SAAR S.
ApJ.
, 687
, 1339
paperarxiv
Elodie metallicity-biased search for transiting Hot Jupiters.
IV. Intermediate period planets orbiting the stars HD43691 and HD132406
DA SILVA R., UDRY S., BOUCHY F., MOUTOU C., MAYOR M., BEUZIT J.-L., BONFILS X., DELFOSSE X., DESORT M., FORVEILLE T., GALLAND F., HEBRARD G., LAGRANGE A.-M., LOEILLET B., LOVIS C., PEPE F., PERRIER C., PONT F., QUELOZ D., SANTOS N., SEGRESAN D., SIVAN J.-P., VIDAL-MADJAR A. &
Astron. & Astrophys.
, 473
, 323
paper
The impact of stellar duplicity on planet occurrence and properties - I. Observational results of a VLT/NACO search for stellar companions to 130 nearby stars with and without planets
EGGENBERGER A., UDRY S., CHAUVIN G., BEUZIT J.-L., LAGRANGE A.-M., SEGRANSAN D., & MAYOR M.
Astron. & Astrophys.
, 474
, 273
paper
Predicting low-frequency radio fluxes of known extrasolar planets
GRIEßMEIER J.-M., ZARKA P. & SPREEUW H.
Astron. & Astrophys.
, 475
, 359
paper