All Outputs (13)

TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data (2021)
Journal Article
Hellier, & Maxted. (2021). TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data. Astronomical Journal, https://doi.org/10.3847/1538-3881/ac223a

We report the first discovery of a transiting circumbinary planet detected from a single sector of Transiting Exoplanet Survey Satellite (TESS) data. During Sector 21, the planet TIC 172900988b transited the primary star and then five days later it t... Read More about TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data.

Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops (2021)
Journal Article
Maxted, P. F. L., Ehrenreich, D., Wilson, T. G., Alibert, Y., Cameron, A. C., Hoyer, S., …Walton, N. A. (2022). Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops. Monthly Notices of the Royal Astronomical Society, 514(1), 77-104. https://doi.org/10.1093/mnras/stab3371

CHEOPS (CHaracterising ExOPlanet Satellite) is an ESA S-class mission that observes bright stars at high cadence from low-Earth orbit. The main aim of the mission is to characterize exoplanets that transit nearby stars using ultrahigh precision photo... Read More about Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops.

The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and transit timing variations as seen by CHEOPS and TESS (2021)
Journal Article
Maxted. (2021). The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and transit timing variations as seen by CHEOPS and TESS. Astronomy & Astrophysics, 654, Article A159

AU Mic is a young planetary system with a resolved debris disc showing signs of planet formation and two transiting warm Neptunes near mean-motion resonances. Here we analyse three transits of AU Mic b observed with the CHaracterising ExOPlanet Satel... Read More about The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and transit timing variations as seen by CHEOPS and TESS.

CHEOPS precision phase curve of the Super-Earth 55 Cancri e (2021)
Journal Article
Maxted. (2021). CHEOPS precision phase curve of the Super-Earth 55 Cancri e. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202140892

Context. 55 Cnc e is a transiting super-Earth (radius 1.88 R? and mass 8 M?) orbiting a G8V host star on a 17-h orbit. Spitzer observations of the planet’s phase curve at 4.5 µm revealed a time-varying occultation depth, and MOST optical observations... Read More about CHEOPS precision phase curve of the Super-Earth 55 Cancri e.

The EBLM project - VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves (2021)
Journal Article
Hellier, & Maxted. (2021). The EBLM project - VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves. Monthly Notices of the Royal Astronomical Society, 306 - 322. https://doi.org/10.1093/mnras/stab1687

The accuracy of theoretical mass, radius, and effective temperature values for M-dwarf stars is an active topic of debate. Differences between observed and theoretical values have raised the possibility that current theoretical stellar structure and... Read More about The EBLM project - VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves.

Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets (2021)
Journal Article
Maxted. (2021). Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets. Monthly Notices of the Royal Astronomical Society, 3810 - 3830. https://doi.org/10.1093/mnras/stab1782

We present 17 transit light curves of seven known warm-Jupiters observed with the CHaracterising ExOPlanet Satellite (CHEOPS). The light curves have been collected as part of the CHEOPS Guaranteed Time Observation (GTO) program that searches for tran... Read More about Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets.

A search for transiting planets around hot subdwarfs (2021)
Journal Article
Maxted. (2021). A search for transiting planets around hot subdwarfs. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202140381

Context. Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot and small He-burning objects. These stars constitute excellent opportunities for addressing the question of the evolution of exoplanetary systems direct... Read More about A search for transiting planets around hot subdwarfs.

Transit detection of the long-period volatile-rich super-Earth v2 Lupi d with CHEOPS (2021)
Journal Article
Maxted. (2021). Transit detection of the long-period volatile-rich super-Earth v2 Lupi d with CHEOPS. Nature Astronomy, 775-787. https://doi.org/10.1038/s41550-021-01381-5

Exoplanets transiting bright nearby stars are key objects for advancing our knowledge of planetary formation and evolution. The wealth of photons from the host star gives detailed access to the atmospheric, interior and orbital properties of the plan... Read More about Transit detection of the long-period volatile-rich super-Earth v2 Lupi d with CHEOPS.

The surface brightness–colour relations based on eclipsing binary stars and calibrated with Gaia EDR3 (2021)
Journal Article
Graczyk, D., Pietrzyński, G., Gałan, C., Gieren, W., Tkachenko, A., Anderson, R., …Konorski, P. (2021). The surface brightness–colour relations based on eclipsing binary stars and calibrated with Gaia EDR3. Astronomy & Astrophysics, 649, Article A109. https://doi.org/10.1051/0004-6361/202140571

Aims. The surface brightness–colour relation (SBCR) is a basic tool for establishing precise and accurate distances within the Local Group. Detached eclipsing binary stars with accurately determined radii and trigonometric parallaxes allow calibratio... Read More about The surface brightness–colour relations based on eclipsing binary stars and calibrated with Gaia EDR3.

Six transiting planets and a chain of Laplace resonances in TOI-178 (2021)
Journal Article
Maxted. (2021). Six transiting planets and a chain of Laplace resonances in TOI-178. Astronomy & Astrophysics, 1-29. https://doi.org/10.1051/0004-6361/202039767

Determining the architecture of multi-planetary systems is one of the cornerstones of understanding planet formation and evolution. Resonant systems are especially important as the fragility of their orbital configuration ensures that no significant... Read More about Six transiting planets and a chain of Laplace resonances in TOI-178.

A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020 (2021)
Journal Article
Maxted, P., Rappaport, S. A., Kurtz, D. W., Handler, G., Jones, D., Nelson, L. A., …Alicavu, F. K. (2021). A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020. Monthly Notices of the Royal Astronomical Society, 503(1), 254-269. https://doi.org/10.1093/mnras/stab336

We report the discovery of the third tidally tilted pulsator, TIC 63328020. Observations with the TESS satellite reveal binary eclipses with an orbital period of 1.1057 d, and d Scuti-type pulsations with a mode frequency of 21.09533 d-1. This pulsat... Read More about A tidally tilted sectoral dipole pulsation mode in the eclipsing binary TIC 63328020.

BG Ind: the nearest doubly eclipsing, compact hierarchical quadruple system (2021)
Journal Article
Borkovits, T., Rappaport, S. A., Maxted, P. F. L., Terentev, I., Omohundro, M., Gagliano, R., …Blackford, M. G. (2021). BG Ind: the nearest doubly eclipsing, compact hierarchical quadruple system. Monthly Notices of the Royal Astronomical Society, 503(3), 3759-3774. https://doi.org/10.1093/mnras/stab621

BG Ind is a well-studied, bright, nearby binary consisting of a pair of F stars in a 1.46-d orbit. We have discovered in the TESS light curve for TIC 229804573 (aka BG Ind), a second eclipsing binary in the system with a 0.53-d period. Our subsequent... Read More about BG Ind: the nearest doubly eclipsing, compact hierarchical quadruple system.

CHEOPS observations of the HD 108236 planetary system: a fifth planet, improved ephemerides, and planetary radii (2021)
Journal Article
Maxted. (2021). CHEOPS observations of the HD 108236 planetary system: a fifth planet, improved ephemerides, and planetary radii. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202039608

Context. The detection of a super-Earth and three mini-Neptunes transiting the bright (V = 9.2 mag) star HD 108236 (also known as TOI-1233) was recently reported on the basis of TESS and ground-based light curves.

Aims. We perform a first characte... Read More about CHEOPS observations of the HD 108236 planetary system: a fifth planet, improved ephemerides, and planetary radii.