77 citations · 589 across the 13 of their papers we have counts for
12 papers · 1 filter
NGTS clusters survey - VII. An Enigmatic Short-Period Circumsecondary Disk Candidate in Orion
Niamh Mallaghan, Ernst J. W. de Mooij, Christopher A. Watson +31
Young stellar systems provide key insights into the processes governing star/planet formation, often exhibiting complex and evolving photometric variability. In this paper, we pres…
Validation of a Temperate Fourth Planet in the K2-133 Multi-planet System
R. Wells, K. Poppenhaeger, C. A. Watson
We present follow-up observations of the K2-133 multi-planet system. Previously, we announced that K2-133 contained three super-Earths orbiting an M1.5V host star - with tentative…
Tidally Distorted Exoplanets: Density Corrections for Short-Period Hot-Jupiters based solely on Observable Parameters
John Burton, Christopher Watson, Alan Fitzsimmons +4
The close proximity of short period hot-Jupiters to their parent star means they are subject to extreme tidal forces. This has a profound effect on their structure and, as a result…
Finding Exoplanets Orbiting Young Active Stars. I. Technique
V. E. Moulds, C. A. Watson, X. Bonfils +2
Stellar activity, such as starspots, can induce radial velocity (RV) variations that can mask or even mimic the RV signature of orbiting exoplanets. For this reason RV exoplanet su…
z'-band Ground-Based Detection of the Secondary Eclipse of WASP-19b
J. R. Burton, C. A. Watson, S. P. Littlefair +4
We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z'-band using the ULTRACAM triple-beam…
The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P-8b from Rossiter-McLaughlin observations
E. K. Simpson, D. Pollacco, A. Collier Cameron +18
We present observations of the Rossiter-McLaughlin effect for the transiting exoplanet systems WASP-1, WASP-24, WASP-38 and HAT-P-8, and deduce the orientations of the planetary or…
WASP-38b: A Transiting Exoplanet in an Eccentric, 6.87d Period Orbit
S. C. C. Barros, F. Faedi, A. Collier Cameron +31
We report the discovery of WASP-38b, a long period transiting planet in an eccentric 6.871815 day orbit. The transit epoch is 2455335.92050 +/- 0.00074 (HJD) and the transit durati…
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.…
On the alignment of debris disks and their host stars' rotation axis -implications for spin-orbit misalignment in exoplanetary systems
C. A. Watson, S. P. Littlefair, C. Diamond +5
It has been widely thought that measuring the misalignment angle between the orbital plane of a transiting exoplanet and the spin of its host star was a good discriminator between…
Rotation periods of exoplanet host stars
Elaine Simpson, Sallie Baliunas, Greg Henry +1
The stellar rotation periods of ten exoplanet host stars have been determined using newly analysed Ca II H & K flux records from Mount Wilson Observatory and Stromgren b, y photome…
Estimating the masses of extra-solar planets
C. A. Watson, S. P. Littlefair, A. Collier Cameron +2
All extra-solar planet masses that have been derived spectroscopically are lower limits since the inclination of the orbit to our line-of-sight is unknown except for transiting sys…
Orbital period variations of hot-Jupiters caused by the Applegate effect
C. A. Watson, T. R. Marsh
Several authors have shown that precise measurements of transit time variations of exoplanets can be sensitive to other planetary bodies, such as exo-moons. In addition, the transi…