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19 papers · 2 filters
The WASP-South search for transiting exoplanets
Coel Hellier, D. R. Anderson, A. Collier Cameron +9
Since 2006 WASP-South has been scanning the Southern sky for transiting exoplanets. Combined with Geneva Observatory radial velocities we have so far found over 30 transiting exopl…
WASP-34b: a near-grazing transiting sub-Jupiter-mass exoplanet in a hierarchical triple system
B. Smalley, D. R. Anderson, A. Collier Cameron +19
We report the discovery of WASP-34b, a sub-Jupiter-mass exoplanet transiting its 10.4-magnitude solar-type host star (1SWASP J110135.89-235138.4; TYC 6636-540-1) every 4.3177 days…
High C/O Ratio and Weak Thermal Inversion in the Very Hot Atmosphere of Exoplanet WASP-12b
Nikku Madhusudhan, Joseph Harrington, Kevin B. Stevenson +16
The carbon-to-oxygen ratio (C/O) in a planet provides critical information about its primordial origins and subsequent evolution. A primordial C/O greater than 0.8 causes a carbide…
WASP-31b: a low-density planet transiting a metal-poor, late-F-type dwarf star
D. R. Anderson, A. Collier Cameron, C. Hellier +15
We report the discovery of the low-density, transiting giant planet WASP-31b. The planet is 0.48 Jupiter masses and 1.55 Jupiter radii. It is in a 3.4-day orbit around a metal-poor…
Transmission spectroscopy of the sodium 'D' doublet in WASP-17b with the VLT
Patricia L Wood, Pierre F L Maxted, Barry Smalley +1
The detection of increased sodium absorption during primary transit implies the presence of an atmosphere around an extrasolar planet, and enables us to infer the structure of this…
WASP-37b: a 1.8 MJ exoplanet transiting a metal-poor star
E. K. Simpson, F. Faedi, S. C. C. Barros +39
We report on the discovery of WASP-37b, a transiting hot Jupiter orbiting a mv = 12.7 G2-type dwarf, with a period of 3.577471 \pm 0.00001 d, transit epoch T0 = 2455338.6188 \pm 0.…
WASP-29b: A Saturn-sized transiting exoplanet
Coel Hellier, D. R. Anderson, A. Collier Cameron +14
We report the discovery of a Saturn-sized planet transiting a V = 11.3, K4 dwarf star every 3.9 d. WASP-29b has a mass of 0.24+/-0.02 M_Jup and a radius of 0.79+/-0.05 R_Jup, makin…
The first WASP public data release
O. W. Butters, R. G. West, D. R. Anderson +17
The WASP (Wide Angle Search for Planets) project is an exoplanet transit survey that has been automatically taking wide field images since 2004. Two instruments, one in La Palma an…
Spin-orbit angle measurements for six southern transiting planets; New insights into the dynamical origins of hot Jupiters
Amaury H. M. J. Triaud, Andrew Collier Cameron, Didier Queloz +14
For transiting planets, the Rossiter-McLaughlin effect allows the measurement of the sky-projected angle beta between the stellar rotation axis and a planet's orbital axis. Using t…
WASP-8b: a retrograde transiting planet in a multiple system
Didier Queloz, David Anderson, Andrew Collier Cameron +11
We report the discovery of WASP-8, a transiting planet of 2.25+-0.08 M_Jup on a strongly inclined eccentric 8.15-day orbit, moving in a retrograde direction to the rotation of its…
WASP-21b: a hot-Saturn exoplanet transiting a thick disc star
F. Bouchy, L. Hebb, I. Skillen +25
We report the discovery of WASP-21b, a new transiting exoplanet discovered by the Wide Angle Search for Planets (WASP) Consortium and established and characterized with the FIES, S…
Spitzer Secondary Eclipses of WASP-18b
Sarah Nymeyer, Joseph Harrington, Ryan A. Hardy +16
The transiting exoplanet WASP-18b was discovered in 2008 by the Wide Angle Search for Planets (WASP) project. The Spitzer Exoplanet Target of Opportunity Program observed secondary…
Line-profile tomography of exoplanet transits -- II. A gas-giant planet transiting a rapidly-rotating A5 star
A. Collier Cameron, E. Guenther, B. Smalley +16
Most of our knowledge of extrasolar planets rests on precise radial-velocity measurements, either for direct detection or for confirmation of the planetary origin of photometric tr…
WASP-26b: A 1-Jupiter-mass planet around an early-G-type star
B. Smalley, D. R. Anderson, A. Collier Cameron +18
We report the discovery of WASP-26b, a moderately over-sized Jupiter-mass exoplanet transiting its 11.3-magnitude early-G-type host star (1SWASP J001824.70-151602.3; TYC 5839-876-1…
The thermal emission of the exoplanets WASP-1b and WASP-2b
Peter J. Wheatley, Andrew Collier Cameron, Joseph Harrington +24
We present a comparative study of the thermal emission of the transiting exoplanets WASP-1b and WASP-2b using the Spitzer Space Telescope. The two planets have very similar masses…
WASP-22 b: A transiting "hot Jupiter" planet in a hierarchical triple system
P. F. L. Maxted, D. R. Anderson, M. Gillon +21
We report the discovery of a transiting planet orbiting the star TYC 6446-326-1. The star, WASP-22, is a moderately bright (V=12.0) solar-type star (Teff = 6000 +/- 100 K, [Fe/H] =…
On the Orbit of Exoplanet WASP-12b
Christopher J. Campo, Joseph Harrington, Ryan A. Hardy +17
We observed two secondary eclipses of the exoplanet WASP-12b using the Infrared Array Camera on the Spitzer Space Telescope. The close proximity of WASP-12b to its G-type star resu…
H-band thermal emission from the 19-hour period planet WASP-19b
D. R. Anderson, M. Gillon, P. F. L. Maxted +6
We present the first ground-based detection of thermal emission from an exoplanet in the H-band. Using HAWK-I on the VLT, we observed an occultation of WASP-19b by its G8V-type hos…
WASP-19b: the shortest period transiting exoplanet yet discovered
Leslie Hebb, A. Collier-Cameron, A. H. M. J. Triaud +19
We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass Mpl = 1.15 \pm 0.08 MJ, radius Rpl = 1.31 \pm 0.06 RJ, and or…