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20 April 2024 |
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Article overview
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Lupus-TR-3b: A Low-Mass Transiting Hot Jupiter in the Galactic Plane? | | David T. F. Weldrake
; Daniel D. R. Bayliss
; Penny D. Sackett
; Brandon W. Tingley
; Michael Gillon
; Johny Setiawan
; | | Date: |
12 Nov 2007 | | Abstract: | We present a prime case for a transiting Hot Jupiter planet identified during
a single-field transit survey towards the Lupus region of the Galactic plane.
The object, Lupus-TR-3b, transits a V=17.4 K1V host star every 3.91405d.
Spectroscopy and stellar colors indicate a host star with effective temperature
5000+/-150 K, with a stellar mass and radius of 0.87+/-0.04 Msun and
0.82+/-0.05 Rsun, respectively. Limb-darkened transit fitting yields a
companion radius of 0.89+/-0.07 Rjup and an orbital inclination of
88.3{+1.3}{-0.8} deg. Magellan 6.5m MIKE radial velocity measurements reveal a
2.4 sigma K=114+/-25 m/s sinusoidal variation in phase with the transit
ephemeris. The resulting mass is 0.81+/-0.18 Mjup and density 1.4+/-0.4 g/cm^3.
Y-band PANIC image deconvolution reveal a V>=21 red neighbor 0.4’’ away which,
although highly unlikely, we cannot conclusively rule out as a blended binary
with current data. However, no in-phase bisector variations are observed and
blend simulations show that only the most unusual binary system can reproduce
our observations. This object is very likely a planet, detected from a highly
efficient observational strategy. If confirmed, Lupus-TR-3b will become the
faintest ground-based detection to date, and one of the lowest mass Hot
Jupiters known. | | Source: | arXiv, 0711.1746 | | Services: | Forum | Review | PDF | Favorites | |
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