SIMBAD references

2007ApJ...665..744P - Astrophys. J., 665, 744-753 (2007/August-2)

Fourteen new companions from the Keck and Lick radial velocity survey including five brown dwarf candidates.

PATEL S.G., VOGT S.S., MARCY G.W., JOHNSON J.A., FISCHER D.A., WRIGHT J.T. and BUTLER R.P.

Abstract (from CDS):

We present radial velocities for 14 stars on the California and Carnegie Planet Search target list that reveal new companions. One star, HD 167665, was fit with a definitive Keplerian orbit leading to a minimum mass for the companion of 50.3 MJup at a separation from its host of ∼5.5 AU. Incomplete or limited phase coverage for the remaining 13 stars prevents us from assigning to them unique orbital parameters. Instead, we fit their radial velocities with Keplerian orbits across a grid of fixed values for Msini and period P, and use the resulting χ2ν surface to place constraints on Msini, P, and semimajor axis a. This technique allowed us to restrict Msini below the brown dwarf-stellar mass boundary for an additional four companions (HD 150554, HD 8765, HD 72780, HD 74014). If the combined five companions are confirmed as brown dwarfs, these results would comprise the first major catch of such objects from our survey beyond ∼3 AU.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Planetary Systems - Stars: Low-Mass, Brown Dwarfs - Techniques: Radial Velocities

Simbad objects: 15

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2007ApJ...665..744P and select 'bookmark this link' or equivalent in the popup menu