Dante Minniti1,2, R. Paul Butler3, Mercedes López-Morales3,6, Stephen A. Shectman4, Fred C. Adams5, Pamela Arriagada1, Alan P. Boss3 and John E. Chambers3
1
Department of Astronomy, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
2
Specola Vaticana, V00120 Citta' del Vaticano, Italy
3
Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington, DC 20015-1305, USA
4
Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USA
5
Astronomy Department, University of Michigan, Ann Arbor, MI 48109, USA
6
Hubble Fellow.
Dante Minniti et al 2009 ApJ 693 1424
We report low-mass companions orbiting five solar-type stars that have emerged from the Magellan precision Doppler velocity survey, with minimum (Msin i) masses ranging from 1.2 to 25 M JUP. These nearby target stars range from mildly metal-poor to metal-rich, and appear to have low chromospheric activity. The companions to the brightest two of these stars have previously been reported from the CORALIE survey. Four of these companions (HD 48265-b, HD 143361-b, HD 28185-b, and HD 111232-b) are low-mass Jupiter-like planets in eccentric intermediate- and long-period orbits. On the other hand, the companion to HD 43848 appears to be a long-period brown dwarf in a very eccentric orbit.
planetary systems; stars: individual (HD 48265, HD 143361, HD 43848, HD 28185, HD 111232)
97.82.Fs Substellar companions; planets
95.10.Eg Orbit determination and improvement
97.82.Cp Photometric and spectroscopic detection; coronographic detection; interferometric detection
Issue 2 (2009 March 10)
Received 2008 July 18 , accepted for publication 2008 October 27
Published 2009 March 9
Dante Minniti et al 2009 ApJ 693 1424