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Signs of accretion in the white dwarf + brown dwarf binary NLTT5306 (2019)
Journal Article
Maxted. (2019). Signs of accretion in the white dwarf + brown dwarf binary NLTT5306. Monthly Notices of the Royal Astronomical Society, 2566 - 2574. https://doi.org/10.1093/mnras/stz127

We present new XSHOOTER spectra of NLTT5306, a 0.44 ± 0.04 M? white dwarf in a short period (101 min) binary system with a brown dwarf companion that is likely to have previously undergone common envelope evolution. We have confirmed the presence of... Read More about Signs of accretion in the white dwarf + brown dwarf binary NLTT5306.

WASP-190b: Tomographic discovery of a transiting hot Jupiter (2019)
Journal Article
Y. Temple, L., Hellier, C., Almleaky, Y., Anderson, D., Bouchy, F., Brown, D., …West, R. (2019). WASP-190b: Tomographic discovery of a transiting hot Jupiter. Astronomy & Astrophysics, 157(4), Article 141. https://doi.org/10.3847/1538-3881/ab095a

We report the discovery of WASP-190b, an exoplanet on a 5.37 day orbit around a mildly evolved F6 IV-V star with V = 11.7,  = 6400 ± 100 K, M* = 1.35 ± 0.05 M?, and R* = 1.6 ± 0.1 R?. The planet has a radius of RP = 1.15 ± 0.09 RJup and a mass of MP ... Read More about WASP-190b: Tomographic discovery of a transiting hot Jupiter.

Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries (2019)
Journal Article
Maxted. (2019). Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aafbed

Using a sample of 81 galactic, detached eclipsing binary stars we investigated the global zero-point shift of their parallaxes with the Gaia Data Release 2 (DR2) parallaxes. The stars in the sample lay in a distance range of 0.04–2 kpc from the Sun.... Read More about Testing Systematics of Gaia DR2 Parallaxes with Empirical Surface Brightness: Color Relations Applied to Eclipsing Binaries.

SB 796: a high-velocity RRc star (2019)
Journal Article
Maxted. (2019). SB 796: a high-velocity RRc star. Monthly Notices of the Royal Astronomical Society, 5327-5335. https://doi.org/10.1093/mnras/sty2828

We report here on a detailed study of a c-type RR Lyrae variable (RRc variable), SB 796, serendipitously discovered in a search of the WASP public data for stars that display large photometric periodic modulation. SB 796 displays a period of P = 0.26... Read More about SB 796: a high-velocity RRc star.

Detectability of shape deformation in short-period exoplanets (2019)
Journal Article
Maxted. (2019). Detectability of shape deformation in short-period exoplanets. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201834215

Context Short-period planets are influenced by the extreme tidal forces of their parent stars. These forces deform the planets causing them to attain nonspherical shapes. The nonspherical shapes, modeled here as triaxial ellipsoids, can have an impa... Read More about Detectability of shape deformation in short-period exoplanets.

Discovery of Three New Transiting Hot Jupiters: WASP-161 b, WASP-163 b, and WASP-170 b (2019)
Journal Article
Maxted, Smalley, & Hellier. (2019). Discovery of Three New Transiting Hot Jupiters: WASP-161 b, WASP-163 b, and WASP-170 b. Astronomical Journal, 43. https://doi.org/10.3847/1538-3881/aaf422

We present the discovery of three new transiting hot Jupiters by the WASP-South project, WASP-161 b, WASP-163 b, and WASP-170 b. Follow-up radial velocities obtained with the Euler/CORALIE spectrograph and transit light curves obtained with the TRAPP... Read More about Discovery of Three New Transiting Hot Jupiters: WASP-161 b, WASP-163 b, and WASP-170 b.

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.

Machine-learning Approaches to Exoplanet Transit Detection and Candidate Validation in Wide-field Ground-based Surveys (2018)
Journal Article
Schanche, N., Collier Cameron, A., Hébrard, G., Nielsen, L., Triaud, A. H. M. J., Almenara, J. M., …Wheatley, P. J. Machine-learning Approaches to Exoplanet Transit Detection and Candidate Validation in Wide-field Ground-based Surveys. https://doi.org/10.1093/mnras/sty3146. Manuscript submitted for publication

Since the start of the Wide Angle Search for Planets (WASP) program, more than 160 transiting exoplanets have been discovered in the WASP data. In the past, possible transit-like events identified by the WASP pipeline have been vetted by human inspec... Read More about Machine-learning Approaches to Exoplanet Transit Detection and Candidate Validation in Wide-field Ground-based Surveys.

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.

A chemical survey of exoplanets with ARIEL (2018)
Journal Article
Maxted. (2018). A chemical survey of exoplanets with ARIEL. Experimental Astronomy, 135 - 209. https://doi.org/10.1007/s10686-018-9598-x

Thousands of exoplanets have now been discovered with a huge range of masses, sizes and orbits: from rocky Earth-like planets to large gas giants grazing the surface of their host star. However, the essential nature of these exoplanets remains largel... Read More about A chemical survey of exoplanets with ARIEL.

Comparison of the power-2 limb-darkening law from the Stagger-grid to Kepler light curves of transiting exoplanets (2018)
Journal Article
Maxted. (2018). Comparison of the power-2 limb-darkening law from the Stagger-grid to Kepler light curves of transiting exoplanets. Astronomy & Astrophysics, A39 -?. https://doi.org/10.1051/0004-6361/201832944

Inaccurate limb-darkening models can be a significant source of error in the analysis of the light curves for transiting exoplanet and eclipsing binary star systems, particularly for high-precision light curves at optical wavelengths. The power-2 lim... Read More about Comparison of the power-2 limb-darkening law from the Stagger-grid to Kepler light curves of transiting exoplanets.

Discovery and characterisation of long-period eclipsing binary stars from Kepler K2 campaigns 1, 2 and 3 (2018)
Journal Article
Maxted. (2018). Discovery and characterisation of long-period eclipsing binary stars from Kepler K2 campaigns 1, 2 and 3. Astronomy & Astrophysics, A38 -?. https://doi.org/10.1051/0004-6361/201732463

The Kepler K2 mission now makes it possible to find and study a wider variety of eclipsing binary stars than has been possible to-date, particularly long-period systems with narrow eclipses. Our aim is to characterise eclipsing binary stars observed... Read More about Discovery and characterisation of long-period eclipsing binary stars from Kepler K2 campaigns 1, 2 and 3.

The Exoplanet Climate Infrared TElescope (EXCITE) (2018)
Journal Article
Maxted. (2018). The Exoplanet Climate Infrared TElescope (EXCITE). Proceedings of SPIE, https://doi.org/10.1117/12.2314225

Although there are a large number of known exoplanets, there is little data on their global atmospheric properties. Phase-resolved spectroscopy of transiting planets – continuous spectroscopic observation of planets during their full orbits – probes... Read More about The Exoplanet Climate Infrared TElescope (EXCITE).

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.

Absolute parameters for the F-type eclipsing binary BW Aquarii (2018)
Journal Article
Maxted. (2018). Absolute parameters for the F-type eclipsing binary BW Aquarii. Research Notes of the American Astronomical Society, 2(2), https://doi.org/10.3847/2515-5172/aac720

BW Aqr is a bright eclipsing binary star containing a pair of F7V stars. The absolute parameters of this binary (masses, radii, etc.) are known to good precision so they are often used to test stellar models, particularly in studies of convective ove... Read More about Absolute parameters for the F-type eclipsing binary BW Aquarii.

Absolute parameters for the F-type eclipsing binary BW Aquarii (2018)
Journal Article
Maxted. (2018). Absolute parameters for the F-type eclipsing binary BW Aquarii. Research Notes of the American Astronomical Society, https://doi.org/10.3847/2515-5172/aac720

BW Aqr is a bright eclipsing binary star containing a pair of F7V stars. The absolute parameters of this binary (masses, radii, etc.) are known to good precision so they are often used to test stellar models, particularly in studies of convective ove... Read More about Absolute parameters for the F-type eclipsing binary BW Aquarii.

The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra (2018)
Journal Article
Smalley, & Maxted. (2018). The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201731954

Context. Atmospheric properties of F-, G- and K-type stars can be measured by spectral model fitting or with the analysis of equivalent width (EW) measurements. These methods require data with good signal-to-noise ratios (S/Ns) and reliable continuum... Read More about The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra.