Skip to main content

Research Repository

Advanced Search

Fundamental effective temperature measurements for eclipsing binary stars (2022)
Thesis
Miller, N. J. (2022). Fundamental effective temperature measurements for eclipsing binary stars. (Thesis). Keele University

Modern high-precision spectroscopy and photometry has made it possible to directly measure masses and radii for stars in detached eclipsing binaries (DEBs) to 0.5% or better. These stars, due to their wide orbits, are suitable for testing models of s... Read More about Fundamental effective temperature measurements for eclipsing binary stars.

δ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642 (2022)
Journal Article
Southworth, J., Murphy, S. J., & Pavlovski, K. (2022). δ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642. Monthly Notices of the Royal Astronomical Society: Letters, 520(1), L53-L57. https://doi.org/10.1093/mnrasl/slad004

We announce the discovery of pulsations in HD?23642, the only bright eclipsing system in the Pleiades, based on light curves from the Transiting Exoplanet Survey Satellite (TESS). We measure 46 pulsation frequencies and attribute them to d?Scuti puls... Read More about δ Scuti pulsations in the bright Pleiades eclipsing binary HD 23642.

Phase curve and geometric albedo of WASP-43b measured with CHEOPS, TESS, and HST WFC3/UVIS (2022)
Journal Article
Maxted. (2022). Phase curve and geometric albedo of WASP-43b measured with CHEOPS, TESS, and HST WFC3/UVIS. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243974

Context. Observations of the phase curves and secondary eclipses of extrasolar planets provide a window onto the composition and thermal structure of the planetary atmospheres. For example, the photometric observations of secondary eclipses lead to t... Read More about Phase curve and geometric albedo of WASP-43b measured with CHEOPS, TESS, and HST WFC3/UVIS.

Discovery of TOI-1260d and the characterization of the multiplanet system (2022)
Journal Article
Lam, K. W. F., Cabrera, J., Hooton, M. J., Alibert, Y., Bonfanti, A., Beck, M., …Winn., J. N. (2023). Discovery of TOI-1260d and the characterization of the multiplanet system. Monthly Notices of the Royal Astronomical Society, 519(1), 1437 - 1451. https://doi.org/10.1093/mnras/stac3639

We report the discovery of a third planet transiting the star TOI-1260, previously known to host two transiting sub-Neptune planets with orbital periods of 3.127 and 7.493 d, respectively. The nature of the third transiting planet with a 16.6-d orbit... Read More about Discovery of TOI-1260d and the characterization of the multiplanet system.

A CHEOPS-enhanced view of the HD 3167 system (2022)
Journal Article
Bourrier, V., Deline, A., Krenn, A., Egger, J., Petit, A., Malavolta, L., …Viotto, V. (2022). A CHEOPS-enhanced view of the HD 3167 system. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243778

Much remains to be understood about the nature of exoplanets smaller than Neptune, most of which have been discovered in compact multi-planet systems. With its inner ultra-short period planet b aligned with the star and two larger outer planets d-c o... Read More about A CHEOPS-enhanced view of the HD 3167 system.

The Gaia-ESO Survey: Lithium measurements and new curves of growth (2022)
Journal Article
Jeffries. (2022). The Gaia-ESO Survey: Lithium measurements and new curves of growth. Astronomy & Astrophysics,

Context. The Gaia-ESO Survey (GES) is a large public spectroscopic survey that was carried out using the multi-object FLAMES spectrograph at the Very Large Telescope. The survey provides accurate radial velocities, stellar parameters, and elemental a... Read More about The Gaia-ESO Survey: Lithium measurements and new curves of growth.

Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet (2022)
Journal Article
Maxted. (2022). Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243720

Context. The HD 108236 system was first announced with the detection of four small planets based on TESS data. Shortly after, the transit of an additional planet with a period of 29.54 d was serendipitously detected by CHEOPS. In this way, HD 108236... Read More about Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet.

Estimating the Convective Turnover Time (2022)
Journal Article
Wright. (2022). Estimating the Convective Turnover Time. Astrophysical Journal, 1-6. https://doi.org/10.3847/1538-4357/ac9cd8

The introduction of the Rossby number (R0), which incorporates the convective turnover time (t), in 1984 was a pioneering idea for understanding the correlation between stellar rotation and activity. The convective turnover time, which cannot be meas... Read More about Estimating the Convective Turnover Time.

The VLT-FLAMES Tarantula Survey Observational evidence for two distinct populations of massive runaway stars in 30 Doradus (2022)
Journal Article
Observational evidence for two distinct populations of massive runaway stars in 30 Doradus. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202244677

Context. The origin of massive runaway stars is an important unsolved problem in astrophysics. Two main scenarios have been proposed, namely: dynamical ejection or release from a binary at the first core collapse. However, their relative contribution... Read More about The VLT-FLAMES Tarantula Survey Observational evidence for two distinct populations of massive runaway stars in 30 Doradus.

The structure and 3D kinematics of vela OB2 (2022)
Journal Article
Armstrong, J. J., Wright, N. J., Jeffries, R. D., Jackson, R. J., & Cantat-Gaudin, T. (2022). The structure and 3D kinematics of vela OB2. Monthly Notices of the Royal Astronomical Society, 517(4), 5704 - 5720. https://doi.org/10.1093/mnras/stac3101

The kinematics of stars in OB associations can provide insights into their formation, dynamical evolution, and eventual fate. The low-mass stellar content of OB associations are sufficiently numerous as to provide a detailed sampling of their kinemat... Read More about The structure and 3D kinematics of vela OB2.

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.

VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM (2022)
Journal Article
Southworth, J., Mancini, L., Dominik, M., Jørgensen, U., Bozza, V., Burgdorf, M., …Snodgrass, C. (2022). VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM. Observatory, 142, 220 - 229

TRAPPIST-1 is an ultra-cool dwarf that hosts seven known transiting planets. We present photometry of the system obtained using three telescopes at ESO La Silla (the Danish 1.54 m telescope and the 2.2 m MPI telescope) and Paranal (Unit Telescope 1 o... Read More about VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM.

Internal mixing processes in massive stars: uncertainties and impact (2022)
Thesis
Kaiser, E. (2022). Internal mixing processes in massive stars: uncertainties and impact. (Thesis). Keele University

Massive stars are key contributors to the evolution of galaxies and many observed phenomena. Therefore, understanding them is crucial to explain the evolution of the Universe and its constituents. The evolution of massive stars is strongly in uenced... Read More about Internal mixing processes in massive stars: uncertainties and impact.

The HD 93963 A transiting system: A 1.04d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS (2022)
Journal Article
Maxted. (2022). The HD 93963 A transiting system: A 1.04d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202243093

We present the discovery of two small planets transiting HD 93963A (TOI-1797), a GOV star (M* = 1.109 ± 0.043M?, R* = 1.043 ± 0.009 R?) in a visual binary system. We combined TESS and CHEOPS space-borne photometry with MuSCAT 2 ground-based photometr... Read More about The HD 93963 A transiting system: A 1.04d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS.

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 stable climate of KELT-9b (2022)
Journal Article
Jones, K., Morris, B., Demory, B., Ehrenreich, D., Hoyer, S., Simon, A., …Jungo, W. (2022). The stable climate of KELT-9b. Astronomy & Astrophysics, 666, Article A118. https://doi.org/10.1051/0004-6361/202243823

Even among the most irradiated gas giants, so-called ultra-hot Jupiters, KELT-9b stands out as the hottest planet thus far discovered with a dayside temperature of over 4500 K. At these extreme irradiation levels, we expect an increase in heat redist... Read More about The stable climate of KELT-9b.

Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data (2022)
Journal Article
Kumar Mannaday, V., Thakur, P., Southworth, J., Jiang, I., Sahu, D., Mancini, L., …Shlyapnikov, A. (2022). Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data. Astronomical Journal, 164(5), 1-20. https://doi.org/10.3847/1538-3881/ac91c2

We present and analyze 58 transit light curves of TrES-3b and 98 transit light curves of Qatar-1b, observed by the Transiting Exoplanet Survey Satellite, plus two transit light curves of Qatar-1b, observed by us, using a ground-based 1.23 m telescope... Read More about Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with TESS Data.

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.

The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products star (2022)
Journal Article
Gilmore, G., Randich, S., Worley, C., Hourihane, A., Gonneau, A., Sacco, G., …Zorec, J. (2022). The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products star. Astronomy & Astrophysics, 66, Article A120. https://doi.org/10.1051/0004-6361/202243134

Context. The Gaia-ESO Public Spectroscopic Survey is an ambitious project designed to obtain astrophysical parameters and elemental abundances for 100 000 stars, including large representative samples of the stellar populations in the Galaxy, and a w... Read More about The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products star.