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Pierre Maxted's Outputs (231)

The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates (2017)
Journal Article
Greer, P., Payne, S., Norton, A., Maxted, P., Smalley, B., West, R., …Kolb, U. (2017). The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates. Astronomy & Astrophysics, A11. https://doi.org/10.1051/0004-6361/201630296

Aims. We set out to compile a catalogue of RRab pulsating variables in the SuperWASP archive and identify candidate Blazhko effect objects within this catalogue. We analysed their light curves and power spectra for correlations in their common charac... Read More about The SuperWASP catalogue of 4963 RR Lyr stars: identification of 983 Blazhko effect candidates.

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 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.

Emission lines in the atmosphere of the irradiated brown dwarf WD0137-349B (2017)
Journal Article
Longstaff, E., Casewell, S., Wynn, G., Maxted, P., & Helling, C. (2017). Emission lines in the atmosphere of the irradiated brown dwarf WD0137-349B. Monthly Notices of the Royal Astronomical Society, 471(2), 1728 - 1736. https://doi.org/10.1093/mnras/stx1786

We present new optical and near-infrared spectra of WD0137-349; a close white dwarf–brown dwarf non-interacting binary system with a period of ˜114 min. We have confirmed the presence of Ha emission and discovered He, Na, Mg, Si, K, Ca, Ti and Fe emi... Read More about Emission lines in the atmosphere of the irradiated brown dwarf WD0137-349B.

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.

Rotation of Planet-Hosting Stars (2017)
Book Chapter
Maxted, P. (2017). Rotation of Planet-Hosting Stars. In Handbook of Exoplanets. Springer

The rotation rate of a star has important implications for the detectability, characterization, and stability of any planets that may be orbiting it. This chapter gives a brief overview of stellar rotation before describing the methods used to measur... Read More about Rotation of Planet-Hosting Stars.

The formation of EL CVn-type binaries (2017)
Journal Article
Maxted. (2017). The formation of EL CVn-type binaries. Monthly Notices of the Royal Astronomical Society, 1874 -1889. https://doi.org/10.1093/mnras/stx115

EL CVn-type binaries are eclipsing binaries that contain an A- or F-type dwarf star and a very low mass (~0.2?M?) helium white dwarf precursor (proto-He WD). A number of such objects have been discovered in the Wide Angle Search for Planets and Keple... Read More about The formation of EL CVn-type binaries.

The Surface Brightness-color Relations Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions (2017)
Journal Article
Maxted. (2017). The Surface Brightness-color Relations Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aa5d56

In this study we investigate the calibration of surface brightness–color (SBC) relations based solely on eclipsing binary stars. We selected a sample of 35 detached eclipsing binaries with trigonometric parallaxes from Gaia DR1 or Hipparcos whose abs... Read More about The Surface Brightness-color Relations Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions.

From Dense Hot Jupiter to Low Density Neptune: The Discovery of WASP-127b, WASP-136b and WASP-138b (2017)
Journal Article
Lam, K., Faedi, F., Brown, D., Anderson, D., Delrez, L., Gillon, M., …Wheatley, P. (2017). From Dense Hot Jupiter to Low Density Neptune: The Discovery of WASP-127b, WASP-136b and WASP-138b. Astronomy and Astrophysics, 599, Article A3. https://doi.org/10.1051/0004-6361/201629403

We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18±0.02 MJ and radius 1.37±0.04 RJ. This is one of the least massive planets discovered by the WASP project. It orbits a br... Read More about From Dense Hot Jupiter to Low Density Neptune: The Discovery of WASP-127b, WASP-136b and WASP-138b.

Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems (2017)
Journal Article
Triaud, A. H., Neveu-VanMalle, M., Lendl, M., Anderson, D. R., Collier Cameron, A., Delrez, L., …West, R. (2017). Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems. Monthly Notices of the Royal Astronomical Society, 467(2), 1714 - 1733. https://doi.org/10.1093/mnras/stx154

We report the detection of two new systems containing transiting planets. Both were identified by WASP as worthy transiting planet candidates. Radial velocity observations quickly verified that the photometric signals were indeed produced by two tran... Read More about Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems.

Rossiter-McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems (2017)
Journal Article
Maxted, Smalley, & Hellier. (2017). Rossiter-McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems. Monthly Notices of the Royal Astronomical Society, 810 - 839. https://doi.org/10.1093/mnras/stw2316

We present new measurements of the projected spin-orbit angle ? for six WASP hot Jupiters, four of which are new to the literature (WASP-61, -62, -76, and -78), and two of which are new analyses of previously measured systems using new data (WASP-71,... Read More about Rossiter-McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems.

WASP-South transiting exoplanets: WASP-130b, WASP-131b, WASP-132b, WASP-139b, WASP-140b, WASP-141b and WASP-142b (2016)
Journal Article
Hellier, C., Anderson, D., Collier Cameron, A., Delrez, L., Gillon, M., Jehin, E., …West, R. (2017). WASP-South transiting exoplanets: WASP-130b, WASP-131b, WASP-132b, WASP-139b, WASP-140b, WASP-141b and WASP-142b. Monthly Notices of the Royal Astronomical Society, 465(3), 3693-3707. https://doi.org/10.1093/mnras/stw3005

We describe seven exoplanets transiting stars of brightness V = 10.1–12.4. WASP-130b is a ‘warm Jupiter’ having an orbital period of 11.6 d around a metal-rich G6 star. Its mass and radius (1.23 ± 0.04 MJup and 0.89 ± 0.03 RJup) support the trend tha... Read More about WASP-South transiting exoplanets: WASP-130b, WASP-131b, WASP-132b, WASP-139b, WASP-140b, WASP-141b and WASP-142b.

Pulsation versus metallicism in Am stars as revealed by LAMOST and WASP (2016)
Journal Article
Smalley, B., Antoci, V., L. Holdsworth, D., W. Kurtz, D., J. Murphy, S., De Cat, P., …J. Wheatley, P. (2017). Pulsation versus metallicism in Am stars as revealed by LAMOST and WASP. Monthly Notices of the Royal Astronomical Society, 465(3), 2662-2670. https://doi.org/10.1093/mnras/stw2903

We present the results of a study of a large sample of A and Am stars with spectral types from LAMOST and light curves from WASP. We find that, unlike normal A stars, d Sct pulsations in Am stars are mostly confined to the effective temperature range... Read More about Pulsation versus metallicism in Am stars as revealed by LAMOST and WASP.

WASP-157b, a Transiting Hot Jupiter Observed with K2 (2016)
Journal Article
Močnik, T., Anderson, D., Brown, D., Collier Cameron, A., Delrez, L., Gillon, M., …West, R. (2016). WASP-157b, a Transiting Hot Jupiter Observed with K2. Publications of the Astronomical Society of the Pacific, 128(970), Article 124403. https://doi.org/10.1088/1538-3873/128/970/124403

We announce the discovery of the transiting hot Jupiter WASP-157b in a 3.95-d orbit around a V = 12.9 G2 main-sequence star. This moderately inflated planet has a Saturn-like density, with a mass of 0.57 ± 0.10 MJup and a radius of 1.06 ± 0.05 RJup.... Read More about WASP-157b, a Transiting Hot Jupiter Observed with K2.

A solar twin in the eclipsing binary LL Aquarii (2016)
Journal Article
Graczyk, D., Smolec, R., Pavlovski, K., Southworth, J., Pietrzyński, G., Maxted, P., …Anderson, R. (2016). A solar twin in the eclipsing binary LL Aquarii. Astronomy & Astrophysics, 594, Article A92. https://doi.org/10.1051/0004-6361/201628918

Aims. In the course of a project to study eclipsing binary stars in vinicity of the Sun, we found that the cooler component of LL Aqr is a solar twin candidate. This is the first known star with properties of a solar twin existing in a non-interactin... Read More about A solar twin in the eclipsing binary LL Aquarii.

WASP-92b, WASP-93b and WASP-118b: three new transiting close-in giant planets (2016)
Journal Article
Hay, K., Collier-Cameron, A., Doyle, A., Hébrard, G., Skillen, I., Anderson, D., …Wilson, P. (2016). WASP-92b, WASP-93b and WASP-118b: three new transiting close-in giant planets. Monthly Notices of the Royal Astronomical Society, 463(3), 3276 - 3289. https://doi.org/10.1093/mnras/stw2090

We present the discovery of three new transiting giant planets, first detected with the WASP telescopes, and establish their planetary nature with follow up spectroscopy and ground-based photometric light curves. WASP-92 is an F7 star, with a moderat... Read More about WASP-92b, WASP-93b and WASP-118b: three new transiting close-in giant planets.

WASP-86b and WASP-102b: super-dense versus bloated planets (2016)
Journal Article
Smalley, Hellier, & Maxted. (2016). WASP-86b and WASP-102b: super-dense versus bloated planets. arXiv,

We report the discovery of two transiting planetary systems: a super dense, sub-Jupiter mass planet WASP-86b (Mpl = 0.82 ± 0.06 MJ; Rpl = 0.63 ± 0.01 RJ), and a bloated, Saturn-like planet WASP-102b (Mpl = 0.62 ± 0.04 MJ; Rpl = 1.27 ± 0.03 RJ). They... Read More about WASP-86b and WASP-102b: super-dense versus bloated planets.

Absolute parameters for AI Phoenicis using WASP photometry (2016)
Journal Article
Maxted, & Hellier. (2016). Absolute parameters for AI Phoenicis using WASP photometry. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201628581

Context. AI Phe is a double-lined, detached eclipsing binary, in which a K-type sub-giant star totally eclipses its main-sequence companion every 24.6 days. This configuration makes AI Phe ideal for testing stellar evolutionary models. Difficulties i... Read More about Absolute parameters for AI Phoenicis using WASP photometry.

ELLC - a fast, flexible light curve model for detached eclipsing binary stars and transiting exoplanets (2016)
Journal Article
Maxted, P. (2016). ELLC - a fast, flexible light curve model for detached eclipsing binary stars and transiting exoplanets. Astronomy & Astrophysics, 591, Article A111. https://doi.org/10.1051/0004-6361/201628579

Very high quality light curves are now available for thousands of detached eclipsing binary stars and transiting exoplanet systems as a result of surveys for transiting exoplanets and other large-scale photometric surveys. I have developed a binary s... Read More about ELLC - a fast, flexible light curve model for detached eclipsing binary stars and transiting exoplanets.