A Possible New Transiting Planet

Abstract

Recently, 59 low-luminosity object transits were reported from the Optical Gravitational Lensing Experiment (OGLE). Our follow-up low-resolution spectroscopy of 16 candidates provided two objects, OGLE-TR-3 and OGLE-TR-10, which have companions with radii compatible with those of gas-giant planets. Further high-resolution spectroscopy revealed a very low velocity variation (<500m/s) of the host star OGLE-TR-3 which may be caused by its unseen companion. An analysis of the radial velocity and light curve results in M<2.5 M_jup, R<1.6 R_jup, and an orbital separation of about 5 R_sol, which makes it the planet with the shortest period known. This allows to identify the low-luminosity companion of OGLE-TR-3 as a possible new gas-giant planet. If confirmed, this makes OGLE-TR-3 together with OGLE-TR-56 the first extrasolar planets detected via their transit light curves.

9 pages, 12 figures, A&A in press

References in corpus (6)

• Detection of Planetary Transits Across a Sun-like Star
• Detection of an Extrasolar Planet Atmosphere
• The Limiting Effects of Dust in Brown Dwarf Model Atmospheres
• The NextGen Model Atmosphere grid: II. Spherically symmetric model atmospheres for giant stars with effective temperatures between 3000 and 6800~K
• The Spectroscopic Orbit of the Planetary Companion Transiting HD209458
• Spectral Types of Planetary Host Star Candidates: Two New Transiting Planets?

Cited by in corpus (11)

• Expected Detection and False Alarm Rates for Transiting Jovian Planets
• Doppler follow-up of OGLE transiting companions in the Galactic bulge
• Re-assessing the radial-velocity evidence for planets around CoRoT-7
• Testing blend scenarios for extrasolar transiting planet candidates. II. -- OGLE-TR-56
• High-resolution spectroscopic follow-up of OGLE planetary transit candidates in the Galactic bulge: two possible Jupiter-mass planets and two blends
• The CORALIE survey for southern extra-solar planets. X. A Hot Jupiter orbiting HD73256
• Measuring the Galactic Distribution of Transiting Planets with WFIRST
• Ellipsoidal Variability in the OGLE Planetary Transit Candidates
• Using color photometry to separate transiting exoplanets from false positives
• Tidal interactions of close-in extrasolar planets: the OGLE cases
• An algorithm to detect blends with eclipsing binaries in planet transit searches