SIMBAD references

2005A&A...433L..21P - Astronomy and Astrophysics, volume 433, L21-24 (2005/4-2)

A planet-sized transiting star around OGLE-TR-122. Accurate mass and radius near the hydrogen-burning limit.

PONT F., MELO C.H.F., BOUCHY F., UDRY S., QUELOZ D., MAYOR M. and SANTOS N.C.

Abstract (from CDS):

We report the discovery and characterisation of OGLE-TR-122b, the smallest main-sequence star to date with a direct radius determination. OGLE-TR-122b transits around its solar-type primary every 7.3-days. With M=0.092±0.009M_☉ and R=0.120^+0.020_–0.013R_☉, it is by far the smallest known eclipsing M-dwarf. The derived mass and radius for OGLE-TR-122b are in agreement with the theoretical expectations. OGLE-TR-122b is the first observational evidence that stars can indeed have radii comparable or even smaller than giant planets. In such cases, the photometric signal is exactly that of a transiting planet and the true nature of the companion can only be determined with high-resolution spectroscopy.

Abstract Copyright: ∼

Journal keyword(s): stars: low-mass, brown-dwarfs - stars: fundamental parameters - stars: binaries - binaries: eclipsing

Simbad objects: 13

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