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Pierre Maxted's Outputs (241)

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.

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.

Evolutionary Constraints on the Long-period Subdwarf B Binary PG 1018–047 (2018)
Journal Article
Maxted. (2018). Evolutionary Constraints on the Long-period Subdwarf B Binary PG 1018–047. Monthly Notices of the Royal Astronomical Society, 1018-1047. https://doi.org/10.1093/mnras/stx2755

We have revisited the sdB+K-star long-period binary PG 1018–047 based on 20 new high-resolution VLT/UVES spectra that provided regular coverage over a period of more than 26 months. We refine the period and establish that the orbit is significantly e... Read More about Evolutionary Constraints on the Long-period Subdwarf B Binary PG 1018–047.

qpower2 - a fast and accurate algorithm for the computation of exoplanet transit light curves with the power-2 limb-darkening law (2018)
Journal Article
Maxted. (2018). qpower2 - a fast and accurate algorithm for the computation of exoplanet transit light curves with the power-2 limb-darkening law. Astronomy & Astrophysics, A33 -?. https://doi.org/10.1051/0004-6361/201834563

Context. The power-2 law, I?( µ) = 1 - c(1-µa), accurately represents the limb-darkening profile for cool stars. It has been implemented in a few transit models to-date using numerical integration but there is as-yet no implementation of the power-2... Read More about qpower2 - a fast and accurate algorithm for the computation of exoplanet transit light curves with the power-2 limb-darkening law.

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.

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., Wheatley, P., & 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., Bieryla, A., Brown, D., Cargile, P., Collier Cameron, A., Collins, K., Colón, K., Curtis, I., D'Ago, G., Delrez, L., Eastman, J., Gaudi, B., Gillon, M., Gregorio, J., James, D., …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.