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Pierre Maxted's Outputs (231)

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.

The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS (2020)
Journal Article
Maxted. (2020). The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202038677

The CHEOPS space mission dedicated to exoplanet follow-up was launched in December 2019, equipped with the capacity to perform photometric measurements at the 20 ppm level. As CHEOPS carries out its observations in a broad optical passband, it can pr... Read More about The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS.

The TESS light curve of the eccentric eclipsing binary 1SWASP J011351.29+314909.7 – no evidence for a very hot M-dwarf companion (2020)
Journal Article
Maxted. (2020). The TESS light curve of the eccentric eclipsing binary 1SWASP J011351.29+314909.7 – no evidence for a very hot M-dwarf companion. Monthly Notices of the Royal Astronomical Society: Letters, 15-19. https://doi.org/10.1093/mnrasl/slaa122

A 2014 study of the eclipsing binary star 1SWASPJ011351.29+314909.7 (J0113+31) reported an unexpectedly high effective temperature for the M-dwarf companion to the 0.95-M? primary star. The effective temperature inferred from the secondary eclipse de... Read More about The TESS light curve of the eccentric eclipsing binary 1SWASP J011351.29+314909.7 – no evidence for a very hot M-dwarf companion.

WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS (2020)
Journal Article
Smalley, Hellier, & Maxted. (2020). WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS. Monthly Notices of the Royal Astronomical Society, 428-440. https://doi.org/10.1093/mnras/staa2848

We present the discovery of two new hot Jupiters identified from the WASP survey, WASP-186b and WASP-187b (TOI-1494.01 and TOI-1493.01). Their planetary nature was established from SOPHIE spectroscopic observations, and additional photometry was obta... Read More about WASP-186 and WASP-187: two hot Jupiters discovered by SuperWASP and SOPHIE with additional observations by TESS.

TIC 278825952: a triply eclipsing hierarchical triple system with the most intrinsically circular outer orbit (2020)
Journal Article
Maxted. (2020). TIC 278825952: a triply eclipsing hierarchical triple system with the most intrinsically circular outer orbit. Monthly Notices of the Royal Astronomical Society, 6034-6043. https://doi.org/10.1093/mnras/staa2762

We report the discovery of a compact triply eclipsing triple star system in the southern continuous viewing zone of the TESS space telescope. TIC 278825952 is a previously unstudied, circular eclipsing binary with a period of 4.781 days with a tertia... Read More about TIC 278825952: a triply eclipsing hierarchical triple system with the most intrinsically circular outer orbit.

The EBLM project. VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A (2020)
Journal Article
Maxted, & Hellier. (2020). The EBLM project. VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A. Monthly Notices of the Royal Astronomical Society, 1627-1633. https://doi.org/10.1093/mnras/staa2071

A dozen short-period detached binaries are known to host transiting circumbinary planets. In all circumbinary systems so far, the planetary and binary orbits are aligned within a couple of degrees. However, the obliquity of the primary star, which is... Read More about The EBLM project. VII. Spin–orbit alignment for the circumbinary planet host EBLM J0608-59 A/TOI-1338 A.

Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets (2020)
Journal Article
Hellier, Smalley, & Maxted. (2020). Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/202038296

We present the discovery and characterization of WASP-148, a new extrasolar system that includes at least two giant planets. The host star is a slowly rotating inactive late-G dwarf with a V = 12 magnitude. The planet WASP-148b is a hot Jupiter of 0.... Read More about Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets.

Fundamental effective temperature measurements for eclipsing binary stars I. Development of the method and application to AI Phoenicis (2020)
Journal Article
Smalley, & Maxted. (2020). Fundamental effective temperature measurements for eclipsing binary stars I. Development of the method and application to AI Phoenicis. Monthly Notices of the Royal Astronomical Society, 2899-2909. https://doi.org/10.1093/mnras/staa2167

Stars with accurate and precise effective temperature (Teff) measurements are needed to test stellar atmosphere models and calibrate empirical methods to determine Teff. There are few standard stars currently available to calibrate temperature indica... Read More about Fundamental effective temperature measurements for eclipsing binary stars I. Development of the method and application to AI Phoenicis.

The Compact Triply Eclipsing Triple Star TIC 209409435 Discovered with TESS (2020)
Journal Article
Maxted. (2020). The Compact Triply Eclipsing Triple Star TIC 209409435 Discovered with TESS. Monthly Notices of the Royal Astronomical Society, 4624-4636. https://doi.org/10.1093/mnras/staa1817

We report the discovery in TESS Sectors 3 and 4 of a compact triply eclipsing triple star system. TIC 209409435 is a previously unknown eclipsing binary with a period of 5.717 days, and the presence of a third star in an outer eccentric orbit of 121.... Read More about The Compact Triply Eclipsing Triple Star TIC 209409435 Discovered with TESS.

The TESS light curve of AI Phoenicis (2020)
Journal Article
Maxted, P. F. L., Gaulme, P., Graczyk, D., Hełminiak, K. G., Johnston, C., Orosz, J. A., …Chaplin, W. J. (2020). The TESS light curve of AI Phoenicis. Monthly Notices of the Royal Astronomical Society, 498(1), 332-343. https://doi.org/10.1093/mnras/staa1662

Accurate masses and radii for normal stars derived from observations of detached eclipsing binary stars are of fundamental importance for testing stellar models and may be useful for calibrating free parameters in these model if the masses and radii... Read More about The TESS light curve of AI Phoenicis.

Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b (2020)
Journal Article
Cooke, B. F., Pollacco, D., Almleaky, Y., Barkaoui, K., Benkhaldoun, Z., Blake, J. A., …Alikakos, J. (2020). Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b. Astronomical Journal, 159(6), Article 255. https://doi.org/10.3847/1538-3881/ab88db

We report the discovery of two transiting exoplanets from the WASP survey, WASP-150b and WASP-176b. WASP-150b is an eccentric (e = 0.38) hot Jupiter on a 5.6 day orbit around a V = 12.03, F8 main-sequence host. The host star has a mass and radius of... Read More about Two Transiting Hot Jupiters from the WASP Survey: WASP-150b and WASP-176b.