Skip to main content

Research Repository

Advanced Search

Outputs (22)

A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067. (2023)
Journal Article
Luque, R., Osborn, H. P., Leleu, A., Pallé, E., Bonfanti, A., Barragán, O., …Zingales, T. (in press). A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067. Nature, 623(7989), 932-937. https://doi.org/10.1038/s41586-023-06692-3

Planets with radii between that of the Earth and Neptune (hereafter referred to as 'sub-Neptunes') are found in close-in orbits around more than half of all Sun-like stars . However, their composition, formation and evolution remain poorly understood... Read More about A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067..

The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets (2023)
Journal Article
Maxted, P. F. L., Triaud, A. H. M. J., & Martin, D. V. (in press). The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets. Universe, 9(12), Article 498. https://doi.org/10.3390/universe9120498

The EBLM project aims to characterise very-low-mass stars that are companions to solar-type stars in eclipsing binaries. We describe the history and motivation for this project, the methodology we use to obtain the precise mass, radius, and effective... Read More about The EBLM Project—From False Positives to Benchmark Stars and Circumbinary Exoplanets.

CHEOPS and TESS view of the ultra-short-period super-Earth TOI-561 b (2023)
Journal Article
Patel, J. A., Egger, J. A., Wilson, T. G., Bourrier, V., Carone, L., Beck, M., …Walton, N. A. (2023). CHEOPS and TESS view of the ultra-short-period super-Earth TOI-561 b. Astronomy & Astrophysics, 679, Article A92. https://doi.org/10.1051/0004-6361/202244946

Context. Ultra-short-period planets (USPs) are a unique class of super-Earths with an orbital period of less than a day, and hence they are subject to intense radiation from their host star. These planets cannot retain a primordial H/He atmosphere, a... Read More about CHEOPS and TESS view of the ultra-short-period super-Earth TOI-561 b.

Refining the properties of the TOI-178 system with CHEOPS and TESS (2023)
Journal Article
Delrez, L., Leleu, A., Brandeker, A., Gillon, M., Hooton, M. J., Collier Cameron, A., …Winn, J. N. (2023). Refining the properties of the TOI-178 system with CHEOPS and TESS. Astronomy & Astrophysics, 678, Article A200. https://doi.org/10.1051/0004-6361/202245479

Context. The TOI-178 system consists of a nearby late K-dwarf transited by six planets in the super-Earth to mini-Neptune regime, with radii ranging from ~1.1 to 2.9 R⊕ and orbital periods between 1.9 and 20.7 days. All planets but the innermost one... Read More about Refining the properties of the TOI-178 system with CHEOPS and TESS.

Refined parameters of the HD 22946 planetary system and the true orbital period of planet d (2023)
Journal Article
Garai, Z., Osborn, H. P., Gandolfi, D., Brandeker, A., Sousa, S. G., Lendl, M., …Walton, N. (2023). Refined parameters of the HD 22946 planetary system and the true orbital period of planet d. Astronomy & Astrophysics, 674, Article A44. https://doi.org/10.1051/0004-6361/202345943

Context. Multi-planet systems are important sources of information regarding the evolution of planets. However, the long-period planets in these systems often escape detection. These objects in particular may retain more of their primordial character... Read More about Refined parameters of the HD 22946 planetary system and the true orbital period of planet d.

TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS (2023)
Journal Article
Ulmer-Moll, S., Osborn, H. P., Tuson, A., Egger, J. A., Lendl, M., Maxted, P., …Walton, N. A. (2023). TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS. Astronomy & Astrophysics, 674, Article A43. https://doi.org/10.1051/0004-6361/202245478

Context. A large sample of long-period giant planets has been discovered thanks to long-term radial velocity surveys, but only a few dozen of these planets have a precise radius measurement. Transiting gas giants are crucial targets for the study of... Read More about TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS.

Fundamental effective temperature measurements for eclipsing binary stars – IV. Selection of new benchmark stars and first results for HD 22064 (2023)
Journal Article
Maxted. (2023). Fundamental effective temperature measurements for eclipsing binary stars – IV. Selection of new benchmark stars and first results for HD 22064. Monthly Notices of the Royal Astronomical Society, 522(2), 2683 - 2695. https://doi.org/10.1093/mnras/stad1112

I describe the selection and initial characterization of 20 eclipsing binary stars that are suitable for calibration and testing of stellar models and data analysis algorithms used by the PLATO mission and spectroscopic surveys. The binary stars sele... Read More about Fundamental effective temperature measurements for eclipsing binary stars – IV. Selection of new benchmark stars and first results for HD 22064.

TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906 (2023)
Journal Article
Tuson, A., Queloz, D., Osborn, H. P., Wilson, T. G., Hooton, M. J., Beck, M., …Wohler, B. (2023). TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906. Monthly Notices of the Royal Astronomical Society, 523(2), 3090-3118. https://doi.org/10.1093/mnras/stad1369

We report the discovery of two warm sub-Neptunes transiting the bright (G = 9.5 mag) K-dwarf HD 15906 (TOI 461, TIC 4646810). This star was observed by the Transiting Exoplanet Survey Satellite (TESS) in sectors 4 and 31, revealing two small transiti... Read More about TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906.

Two warm Neptunes transiting HIP 9618 revealed by <i>TESS</i> and <i>Cheops</i> (2023)
Journal Article
Osborn, H. P., Nowak, G., Hébrard, G., Masseron, T., Lillo-Box, J., Pallé, E., …Winn, J. N. (2023). Two warm Neptunes transiting HIP 9618 revealed by TESS and Cheops. Monthly Notices of the Royal Astronomical Society, 523(2), 3069-3089. https://doi.org/10.1093/mnras/stad1319

HIP 9618 (HD 12572, TOI-1471, TIC 306263608) is a bright (G = 9.0 mag) solar analogue. TESS photometry revealed the star to have two candidate planets with radii of 3.9 ± 0.044 R⊕ (HIP 9618 b) and 3.343 ± 0.039 R⊕ (HIP 9618 c). While the 20.77291 d p... Read More about Two warm Neptunes transiting HIP 9618 revealed by <i>TESS</i> and <i>Cheops</i>.