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Fundamental properties of the pre-main sequence eclipsing stars of MML 53 and the mass of the tertiary (2019)
Journal Article
Hellier. (2019). Fundamental properties of the pre-main sequence eclipsing stars of MML 53 and the mass of the tertiary. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201733299

We present the most comprehensive analysis to date of the Upper Centaurus Lupus eclipsing binary MML 53 (with P-EB = 2.097892 d), and for the first time, confirm the bound-nature of the third star (in a P-3 similar to 9 yr orbit) by constraining its... Read More about Fundamental properties of the pre-main sequence eclipsing stars of MML 53 and the mass of the tertiary.

New transiting hot Jupiters discovered by WASP-South, Euler/CORALIE and TRAPPIST-South (2019)
Journal Article
Smalley, Hellier, & Maxted. (2019). New transiting hot Jupiters discovered by WASP-South, Euler/CORALIE and TRAPPIST-South. Monthly Notices of the Royal Astronomical Society, 1379-1391. https://doi.org/10.1093/mnras/sty2741

We report the discovery of eight hot-Jupiter exoplanets from the WASP-South transit survey. WASP-144b has a mass of 0.44 Mj, a radius of 0.85 Rj, and is in a 2.27-d orbit around a V = 12.9, K2 star which shows a 21-d rotational modulation. WASP-145Ab... Read More about New transiting hot Jupiters discovered by WASP-South, Euler/CORALIE and TRAPPIST-South.

Discovery of WASP-174b: Doppler tomography of a near-grazing transit (2018)
Journal Article
Maxted, Hellier, & Smalley. (2018). Discovery of WASP-174b: Doppler tomography of a near-grazing transit. Monthly Notices of the Royal Astronomical Society, 5307-5313. https://doi.org/10.1093/mnras/sty2197

We report the discovery and tomographic detection of WASP-174b, a planet with a near-grazing transit on a 4.23-d orbit around a V = 11.9, F6V star with [Fe/H] = 0.09 ± 0.09. The planet is in a moderately misaligned orbit with a sky-projected spin–orb... Read More about Discovery of WASP-174b: Doppler tomography of a near-grazing transit.

WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts (2018)
Journal Article
Lendl, M., Anderson, D. R., Bonfanti, A., Bouchy, F., Burdanov, A., Collier Cameron, A., …West, R. G. (2019). WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts. Monthly Notices of the Royal Astronomical Society, 482(1), 301 -312. https://doi.org/10.1093/mnras/sty2667

We report the discovery of four transiting hot Jupiters, WASP-147, WASP-160B, WASP-164, and WASP-165 from the WASP survey. WASP-147b is a near Saturn-mass (MP = 0.28MJ) object with a radius of 1.11RJ orbiting a G4 star with a period of 4.6 d. WASP-16... Read More about WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts.

WASP-128b: a transiting brown dwarf in the dynamical-tide regime (2018)
Journal Article
Hodzic, V., Triaud, A. H. M. J., Anderson, D. R., Bouchy, F., Cameron, A. C., Delrez, L., …West, R. (2018). WASP-128b: a transiting brown dwarf in the dynamical-tide regime. Monthly Notices of the Royal Astronomical Society, 481(4), 5091-5097. https://doi.org/10.1093/mnras/sty2512

Massive companions in close orbits around G dwarfs are thought to undergo rapid orbital decay due to runaway tidal dissipation. We report here the discovery of WASP-128b, a brown dwarf discovered by the WASP survey transiting a G0V host on a 2.2 d or... Read More about WASP-128b: a transiting brown dwarf in the dynamical-tide regime.

WASP 0639-32: a new F-type subgiant/K-type main-sequence detached eclipsing binary from the WASP project (2018)
Journal Article
Hellier, & Maxted. (2018). WASP 0639-32: a new F-type subgiant/K-type main-sequence detached eclipsing binary from the WASP project. Astronomy & Astrophysics, A135 - A135. https://doi.org/10.1051/0004-6361/201731435

Aims. Our aim is to measure the masses and radii of the stars in a newly-discovered detached eclipsing binary system to a high precision (˜1%), enabling the system to be used for the calibration of free parameters in stellar evolutionary models. M... Read More about WASP 0639-32: a new F-type subgiant/K-type main-sequence detached eclipsing binary from the WASP project.

Thermal emission of WASP-48b in the K-s-band (2018)
Journal Article
Hellier. (2018). Thermal emission of WASP-48b in the K-s-band. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201527071

We report a detection of thermal emission from the hot Jupiter WASP-48b in the Ks-band. We used the Wide-field Infra-red Camera on the 3.6-m Canada-France Hawaii Telescope to observe an occultation of the planet by its host star. From the resulting o... Read More about Thermal emission of WASP-48b in the K-s-band.

WASP-104b is darker than charcoal (2018)
Journal Article
Močnik, T., Hellier, C., & Southworth, J. (2018). WASP-104b is darker than charcoal. Astronomical Journal, 156(2), Article 44. https://doi.org/10.3847/1538-3881/aacb26

By analyzing the K2 short-cadence data from Campaign 14, we detect phase-curve modulation in the light curve of the hot-Jupiter host star WASP-104. The ellipsoidal modulation is detected with high significance and in agreement with theoretical expect... Read More about WASP-104b is darker than charcoal.

An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet. (2018)
Journal Article
Hellier, & Smalley. (2018). An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet. Nature, 526 - 529. https://doi.org/10.1038/s41586-018-0101-7

Broad absorption signatures from alkali metals, such as the sodium (Na I) and potassium (K I) resonance doublets, have long been predicted in the optical atmospheric spectra of cloud-free irradiated gas giant exoplanets1-3. However, observations have... Read More about An absolute sodium abundance for a cloud-free 'hot Saturn' exoplanet..

Helium in the eroding atmosphere of an exoplanet (2018)
Journal Article
Hellier. (2018). Helium in the eroding atmosphere of an exoplanet. Nature, 68 -70. https://doi.org/10.1038/s41586-018-0067-5

Helium is the second-most abundant element in the Universe after hydrogen and is one of the main constituents of gas-giant planets in our Solar System. Early theoretical models predicted helium to be among the most readily detectable species in the a... Read More about Helium in the eroding atmosphere of an exoplanet.

The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert (2018)
Journal Article
Smalley, Hellier, & Maxted. (2018). The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201731735

To investigate the origin of the features discovered in the exoplanet population, the knowledge of exoplanets mass and radius with a good precision (less than or similar to 10%) is essential. To achieve this purpose the discovery of transiting exopla... Read More about The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert.

Ephemeris Refinement of a Hot Jupiter K2-140b (2018)
Journal Article
Močnik, T., Hellier, C., & Anderson, D. R. Ephemeris Refinement of a Hot Jupiter K2-140b. Research Notes of the American Astronomical Society, 2(1), 22. https://doi.org/10.3847/2515-5172/aaabc2

K2-140b (EPIC 228735255b) is a weakly inflated hot Jupiter discovered by Giles et al. (2018). The discovery photometry was comprised of the K2 (Howell et al. 2014) long-cadence observations from Campaign 10b, which ran between 2016 July 13 and Septem... Read More about Ephemeris Refinement of a Hot Jupiter K2-140b.

An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b (2018)
Journal Article
Clark, B. J. M., Anderson, D. R., Hellier, C., Turner, O. D., & Močnik, T. (2018). An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b. Publications of the Astronomical Society of the Pacific, 130(985), 034401. https://doi.org/10.1088/1538-3873/aaa33e

We present our analysis of the K2 short-cadence data of two previously known hot Jupiter exoplanets: WASP-55b and WASP-75b. The high precision of the K2 light curves enabled us to search for transit timing and duration variations, rotational modulati... Read More about An Analysis of Transiting Hot Jupiters Observed with K2: WASP-55b and WASP-75b.

High-precision multi-wavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b (2017)
Journal Article
Smalley, Hellier, & Maxted. (2017). High-precision multi-wavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b. Monthly Notices of the Royal Astronomical Society, 2334-2351. https://doi.org/10.1093/mnras/stx2896

We present sixteen occultation and three transit light curves for the ultra-short period hot Jupiter WASP-103b, in addition to five new radial velocity measurements. We combine these observations with archival data and perform a global analysis of th... Read More about High-precision multi-wavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b.

Periodic eclipses of the young star PDS 110 discovered with WASP and KELT photometry (2017)
Journal Article
Hellier. (2017). Periodic eclipses of the young star PDS 110 discovered with WASP and KELT photometry. Monthly Notices of the Royal Astronomical Society, 740 -749. https://doi.org/10.1093/mnras/stx1249

We report the discovery of eclipses by circumstellar disc material associated with the young star PDS 110 in the Ori OB1a association using the SuperWASP and Kilodegree Extremely Little Telescope surveys. PDS 110 (HD 290380, IRAS 05209-0107) is a rar... Read More about Periodic eclipses of the young star PDS 110 discovered with WASP and KELT photometry.

The EBLM Project: IV. Spectroscopic orbits of over 100 eclipsing M dwarfs masquerading as transiting hot Jupiters (2017)
Journal Article
Smalley, Hellier, & Maxted. (2017). The EBLM Project: IV. Spectroscopic orbits of over 100 eclipsing M dwarfs masquerading as transiting hot Jupiters. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/201730993

We present 2271 radial velocity measurements taken on 118 single-line binary stars, taken over eight years with the CORALIE spectrograph. The binaries consist of F/G/K primaries and M dwarf secondaries. They were initially discovered photometrically... Read More about The EBLM Project: IV. Spectroscopic orbits of over 100 eclipsing M dwarfs masquerading as transiting hot Jupiters.

The discoveries of WASP-91b, WASP-105b and WASP-107b: Two warm Jupiters and a planet in the transition region between ice giants and gas giants (2017)
Journal Article
Hellier. (2017). The discoveries of WASP-91b, WASP-105b and WASP-107b: Two warm Jupiters and a planet in the transition region between ice giants and gas giants. Astronomy and Astrophysics, A110 - A110. https://doi.org/10.1051/0004-6361/201730439

We report the discoveries of three transiting exoplanets. WASP-91b is a warm Jupiter (1.34 MJup, 1.03 RJup) in a 2.8-day orbit around a metal-rich K3 star. WASP-105b is a warm Jupiter (1.8 MJup, 0.96 RJup) in a 7.9-day orbit around a metal-rich K2 st... Read More about The discoveries of WASP-91b, WASP-105b and WASP-107b: Two warm Jupiters and a planet in the transition region between ice giants and gas giants.

The EBLM project - III. A Saturn-size low-mass star at the hydrogen-burning limit (2017)
Journal Article
Hellier, Smalley, & Maxted. (2017). The EBLM project - III. A Saturn-size low-mass star at the hydrogen-burning limit. Astronomy & Astrophysics, L6 -L6. https://doi.org/10.1051/0004-6361/201731107

We report the discovery of an eclipsing binary system with mass-ratio q ~ 0.07. After identifying a periodic photometric signal received by WASP, we obtained CORALIE spectroscopic radial velocities and follow-up light curves with the Euler and TRAPPI... Read More about The EBLM project - III. A Saturn-size low-mass star at the hydrogen-burning limit.

WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star (2017)
Journal Article
Temple, L., Hellier, C., Albrow, M., Anderson, D., Bayliss, D., Beatty, T., …Zhou, G. (2017). WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star. Monthly Notices of the Royal Astronomical Society, 471(3), 2743 - 2752. https://doi.org/10.1093/mnras/stx1729

We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with a 2.02-d orbit around a V = 10.5, F1V star with [Fe/H] = 0.1 ± 0.1. The 1.5 RJup planet was confirmed by Doppler tomography of the stellar line profiles duri... Read More about WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star.