Nontrivial zeros of the Riemann zeta function (2023)
Working Paper
Austin, J. Nontrivial zeros of the Riemann zeta function

The Riemann hypothesis, stating that all nontrivial zeros of the Riemann zeta function have real parts equal to 1/2, is one of the most important conjectures in mathematics. In this paper we prove the Riemann hypothesis by solving an integral form of... Read More about Nontrivial zeros of the Riemann zeta function.

The Gaia-ESO Survey: Preparing the ground for 4MOST and WEAVE galactic surveys (2023)
Journal Article
Nepal, S., Guiglion, G., de Jong, R., Valentini, M., Chiappini, C., Steinmetz, M., …Zaggia, S. (2023). The Gaia-ESO Survey: Preparing the ground for 4MOST and WEAVE galactic surveys. Astronomy & Astrophysics, 671, Article A61. https://doi.org/10.1051/0004-6361/202244765

Context. Originating from several sources (Big Bang, stars, cosmic rays) and being strongly depleted during stellar lifetime, the lithium element is of great interest as its chemical evolution in the Milky Way is not yet well understood. To help cons... Read More about The Gaia-ESO Survey: Preparing the ground for 4MOST and WEAVE galactic surveys.

Transit timing variation analysis of the low-mass brown dwarf KELT-1 b (2023)
Journal Article
Baştürk, Ö., Taylor, J., Yalçınkaya, S., Mancini, L., Esmer, E., Tekin, M., …Yeşilyaprak, C. (2023). Transit timing variation analysis of the low-mass brown dwarf KELT-1 b. Monthly Notices of the Royal Astronomical Society, 521(1), 1200-1209. https://doi.org/10.1093/mnras/stad248

We investigate whether there is a variation in the orbital period of the short-period brown dwarf-mass KELT-1 b, which is one of the best candidates to observe orbital decay. We obtain 19 high-precision transit light curves of the target using six di... Read More about Transit timing variation analysis of the low-mass brown dwarf KELT-1 b.

The GAPS programme at TNG XL. A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422 (2022)
Journal Article
Hellier. (2022). The GAPS programme at TNG XL. A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202244079

Context. Neptunes represent one of the main types of exoplanets and have chemical-physical characteristics halfway between rocky and gas giant planets. Therefore, their characterization is important for understanding and constraining both the formati... Read More about The GAPS programme at TNG XL. A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422.

Fundamental effective temperature measurements for eclipsing binary stars – II. The detached F-type eclipsing binary CPD-54 810 (2022)
Journal Article
Miller, N. J., Maxted, P. F. L., Graczyk, D., Tan, T. G., & Southworth, J. (2022). Fundamental effective temperature measurements for eclipsing binary stars – II. The detached F-type eclipsing binary CPD-54 810. Monthly Notices of the Royal Astronomical Society, 517(4), 5129-5143. https://doi.org/10.1093/mnras/stac2968

CPD-54 810 is a double-lined detached eclipsing binary containing two mid-F type dwarfs on an eccentric 26-d orbit. We perform a combined analysis of the extensive photometry obtained by the TESS space mission along with previously published observat... Read More about Fundamental effective temperature measurements for eclipsing binary stars – II. The detached F-type eclipsing binary CPD-54 810.

The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy (2022)
Journal Article
Wright, Jeffries, Abbas, U., Borsen-Koch, V., Villanova, S., Wright, N., …Bragaglia, A. (2022). The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243141

Context. In the last 15 years different ground-based spectroscopic surveys have been started (and completed) with the general aim of delivering stellar parameters and elemental abundances for large samples of Galactic stars, complementing Gaia astrom... Read More about The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy.

Stellar limb darkening A new MPS-ATLAS library for Kepler, TESS, CHEOPS, and PLATO passbands (2022)
Journal Article
Maxted. (2022). Stellar limb darkening A new MPS-ATLAS library for Kepler, TESS, CHEOPS, and PLATO passbands. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243722

Context. The detection of the first exoplanet paved the way for the era of transit-photometry space missions with revolutionary photometric precision, whose aim is to discover new exoplanetary systems around different types of stars. With this high p... Read More about Stellar limb darkening A new MPS-ATLAS library for Kepler, TESS, CHEOPS, and PLATO passbands.

GJ 3090 b: one of the most favourable mini-Neptune for atmospheric characterisation (2022)
Journal Article
Hellier. (2022). GJ 3090 b: one of the most favourable mini-Neptune for atmospheric characterisation. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243975

We report the detection of GJ 3090 b (TOI-177.01), a mini-Neptune on a 2.9-day orbit transiting a bright (K = 7.3 mag) M2 dwarf located at 22 pc. The planet was identified by the Transiting Exoplanet Survey Satellite and was confirmed with the High A... Read More about GJ 3090 b: one of the most favourable mini-Neptune for atmospheric characterisation.

Identification of carbon dioxide in an exoplanet atmosphere (2022)
Journal Article
Ahrer, E., Wheatley, P. J., Alderson, L., Wakeford, H. R., Grant, D., Batalha, N. M., …Zhang, X. (2022). Identification of carbon dioxide in an exoplanet atmosphere. Nature, 614, 649-652. https://doi.org/10.1038/s41586-022-05269-w

Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the metal enrichment (i.e., elements heavier than helium, also called "metallicity"), and thus... Read More about Identification of carbon dioxide in an exoplanet atmosphere.

The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems (2022)
Journal Article
Mancini, L., Esposito, M., Covino, E., Southworth, J., Poretti, E., Andreuzzi, G., …Piotto, G. (2022). The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems. Astronomy & Astrophysics, 664, Article A162. https://doi.org/10.1051/0004-6361/202243742

Context. The measurement of the spin-orbit alignment of hot Jupiters, including a range of orbital and physical properties, can provide information about the evolution of the orbits of this special class of giant planets.

Aims. We aim to refine th... Read More about The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems.

Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems (2022)
Journal Article
Claret, A., & Southworth, J. (2022). Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems. Astronomy & Astrophysics, 664, Article A128. https://doi.org/10.1051/0004-6361/202243827

Context. Limb darkening is an important stellar phenomenon and must be accounted for in the study of stellar spectra, eclipsing binaries, transiting planetary systems, and microlensing events. The power-2 limb-darkening law provides a good match to t... Read More about Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, and TESS photometric systems.

Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076 (2022)
Journal Article
Maxted. (2022). Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076. Astronomy & Astrophysics, A156 - A156. https://doi.org/10.1051/0004-6361/202243065

Context. TOI-2076 is a transiting three-planet system of sub-Neptunes orbiting a bright (G = 8.9 mag), young (340 ± 80 Myr) K-type star. Although a validated planetary system, the orbits of the two outer planets were unconstrained as only two non-con... Read More about Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076.

TOI-712: A System of Adolescent Mini-Neptunes Extending to the Habitable Zone (2022)
Journal Article
Hellier. (2022). TOI-712: A System of Adolescent Mini-Neptunes Extending to the Habitable Zone. Astronomical Journal, https://doi.org/10.3847/1538-3881/ac7954

As an all-sky survey, NASA's Transiting Exoplanet Survey Satellite (TESS) mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets that enable study of the evolutionary processes that occur wit... Read More about TOI-712: A System of Adolescent Mini-Neptunes Extending to the Habitable Zone.

Four bright eclipsing binaries with γ Doradus pulsating components: CM Lac, MZ Lac, RX Dra, and V2077 Cyg (2022)
Journal Article
Southworth, J., & Van Reeth, T. (2022). Four bright eclipsing binaries with γ Doradus pulsating components: CM Lac, MZ Lac, RX Dra, and V2077 Cyg. Monthly Notices of the Royal Astronomical Society, 515(2), 2755-2765. https://doi.org/10.1093/mnras/stac1993

The study of pulsating stars in eclipsing binaries holds the promise of combining two different ways of measuring the physical properties of a star to obtain improved constraints on stellar theory. Gravity (g) mode pulsations such as those found in γ... Read More about Four bright eclipsing binaries with γ Doradus pulsating components: CM Lac, MZ Lac, RX Dra, and V2077 Cyg.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 9: THE SOLAR-TYPE SYSTEM KIC 5359678 (2022)
Journal Article
Southworth, J. (2022). REDISCUSSION OF ECLIPSING BINARIES. PAPER 9: THE SOLAR-TYPE SYSTEM KIC 5359678. Observatory, 141, 103 - 113

Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS (2022)
Journal Article
Maxted. (2022). Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS. Monthly Notices of the Royal Astronomical Society, 4551 - 4571. https://doi.org/10.1093/mnras/stac199

We present a precise characterization of the TOI-561 planetary system obtained by combining previously published data with TESS and CHEOPS photometry, and a new set of 62 HARPS-N radial velocities (RVs). Our joint analysis confirms the presence of fo... Read More about Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS.

BEBOP III. Observations and an independent mass measurement of Kepler-16 (AB) b - the first circumbinary planet detected with radial velocities (2022)
Journal Article
Maxted, P. F. L., Triaud, A. H. M. J., Standing, M. R., Heidari, N., Martin, D. V., Boisse, I., …Willett, E. (2022). BEBOP III. Observations and an independent mass measurement of Kepler-16 (AB) b - the first circumbinary planet detected with radial velocities. Monthly Notices of the Royal Astronomical Society, 511(3), 3561-3570. https://doi.org/10.1093/mnras/stab3712

The radial velocity method is amongst the most robust and most established means of detecting exoplanets. Yet, it has so far failed to detect circumbinary planets despite their relatively high occurrence rates. Here, we report velocimetric measuremen... Read More about BEBOP III. Observations and an independent mass measurement of Kepler-16 (AB) b - the first circumbinary planet detected with radial velocities.

Detection of the tidal deformation of WASP-103b at 3 s with CHEOPS (Corrigendum) (2022)
Journal Article
Barros, S. C. C., Akinsanmi, B., Boué, G., Smith, A. M. S., Laskar, J., Ulmer-Moll, S., …Walton, N. A. (2022). Detection of the tidal deformation of WASP-103b at 3 s with CHEOPS (Corrigendum). Astronomy & Astrophysics, 658, Article C1. https://doi.org/10.1051/0004-6361/202142196e

The name of co-author Sébastien Salmon (Observatoire Astronomique de l’Université de Genève, Switzerland) was missing from the author list of the original published article. It is added among the authors in this Corrigendum.

Grids of stellar models with rotation VII: models from 0.8 to 300 M-circle dot at supersolar metallicity (Z=0.020) (2022)
Journal Article
Yusof, N., Hirschi, R., Eggenberger, P., Ekström, S., Georgy, C., Sibony, Y., …Murphy, L. (2022). Grids of stellar models with rotation VII: models from 0.8 to 300 M-circle dot at supersolar metallicity (Z=0.020). Monthly Notices of the Royal Astronomical Society, 511(2), 2814 - 2828. https://doi.org/10.1093/mnras/stac230

We present a grid of stellar models at supersolar metallicity (Z = 0.020) extending the previous grids of Geneva models at solar and sub-solar metallicities. A metallicity of Z = 0.020 was chosen to match that of the inner Galactic disc. A modest inc... Read More about Grids of stellar models with rotation VII: models from 0.8 to 300 M-circle dot at supersolar metallicity (Z=0.020).

BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities (2022)
Journal Article
Maxted, & Hellier. (2022). BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities. Monthly Notices of the Royal Astronomical Society, 3571 - 3583. https://doi.org/10.1093/mnras/stac113

BEBOP is a radial-velocity survey that monitors a sample of single-lined eclipsing binaries, in search of circumbinary planets by using high-resolution spectrographs. Here, we describe and test the methods we use to identify planetary signals within... Read More about BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities.