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ELODIE low-mass companions to solar-type stars

  • D. Naef (a1), M. Mayor (a1), D. Queloz (a1), S. Udry (a1), F. Arenou (a2), J.-L. Beuzit (a3), C. Perrier-Bellet (a3) and J.-P. Sivan (a4)...

Abstract

We present radial-velocity measurements for three solar-type stars (HD 127506, HD 174457 and HD 185414) hosting low-mass companions. The measurements were obtained with the ELODIE echelle spectrograph mounted on the 1.93–m telescope at Observatoire de Haute–Provence (CNRS, France) within the frame of the OHP-ELODIE Planet Search Programme. The inferred minimum masses of the detected companions are in the substellar mass range. Combining ELODIE radial-velocity data and HIPPARCOS astrometric data, the inclination angles of the orbital planes of HD 127506 and HD 174457 have been derived providing us with the de-projected masses of the companions: m 2 = 44MJup for the companion of HD 127506 and m 2= 0.13M for the companion of HD 174457. Moreover, using adaptive optics measurements, we show that HD 174457 is probably a (F8V + M7V + M3-4V) triple system. To date, only a minimal orbital solution is available for HD 185414.

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References

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Baranne, A., Mayor, M., & Poncet, J.L. 1979, Vistas Astr., 23, 279.
Baranne, A., Queloz, D., Mayor, M., et al., 1996, A&AS 119, 1.
ESA, 1997, The HIPPARCOS and TYCHO catalogue, ESA-SP 1200.
Halbwachs, J.L., Arenou, F., Mayor, M., Udry, S., & Queloz, D. 2000, A&A, 355, 581 2000, ApJ, 529, L41.
Mayor, M., & Queloz, D. 1996, in the 9th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, ASP Conf. Ser., 109.
Mayor, M., Queloz, D., Udry, S., & Halbwachs, J.L. 1997, IAU Coll. 161, 313.

ELODIE low-mass companions to solar-type stars

  • D. Naef (a1), M. Mayor (a1), D. Queloz (a1), S. Udry (a1), F. Arenou (a2), J.-L. Beuzit (a3), C. Perrier-Bellet (a3) and J.-P. Sivan (a4)...

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