All Outputs (267)

Characterization of the δ Scuti eclipsing binary KIC 4851217 and its tertiary companion as well as detection of tidally tilted pulsations (2024)
Journal Article
Jennings, Z., Southworth, J., Rappaport, S. A., Borkovits, T., Handler, G., & Kurtz, D. W. (in press). Characterization of the δ Scuti eclipsing binary KIC 4851217 and its tertiary companion as well as detection of tidally tilted pulsations. Monthly Notices of the Royal Astronomical Society, Article stae1879. https://doi.org/10.1093/mnras/stae1879

Stellar theory enables us to understand the properties of stars at different stages of their evolution, and contributes to other fields of astrophysics such as galactic and exoplanet studies. Assessing the accuracy of stellar theories necessitates hi... Read More about Characterization of the δ Scuti eclipsing binary KIC 4851217 and its tertiary companion as well as detection of tidally tilted pulsations.

Rediscussion of eclipsing binaries. Paper XVIII. The F-type system OO Pegasi (2024)
Journal Article
Southworth, J. (2024). Rediscussion of eclipsing binaries. Paper XVIII. The F-type system OO Pegasi. Observatory, 144(1300),

OO Peg is a detached eclipsing binary system containing two late-A-type stars in a circular orbit with a period of 2.985 d. Using published spectroscopic results and a light curve from the Transiting Exoplanet Survey Satellite (TESS) we determine the... Read More about Rediscussion of eclipsing binaries. Paper XVIII. The F-type system OO Pegasi.

The GAPS Programme at TNG: LV. Multiple molecular species in the atmosphere of HAT-P-11 b and review of the HAT-P-11 planetary system (2024)
Journal Article
Basilicata, M., Giacobbe, P., Bonomo, A. S., Scandariato, G., Brogi, M., Singh, V., …Turrini, D. (2024). The GAPS Programme at TNG: LV. Multiple molecular species in the atmosphere of HAT-P-11 b and review of the HAT-P-11 planetary system. Astronomy & Astrophysics, 686, Article A127. https://doi.org/10.1051/0004-6361/202347659

Star-spot activity, orbital obliquity, transmission spectrum, physical properties, and transit time variations of the HATS-2 planetary system (2024)
Journal Article
Biagiotti, F., Mancini, L., Southworth, J., Tregloan-Reed, J., Naponiello, L., Jørgensen, U. G., …Vignes, J.-P. (2024). Star-spot activity, orbital obliquity, transmission spectrum, physical properties, and transit time variations of the HATS-2 planetary system. Astronomy & Astrophysics, 685, Article A131. https://doi.org/10.1051/0004-6361/202347872

Aims. Our aim in this paper is to refine the orbital and physical parameters of the HATS-2 planetary system and study transit timing variations and atmospheric composition thanks to transit observations that span more than 10 yr and that were collect... Read More about Star-spot activity, orbital obliquity, transmission spectrum, physical properties, and transit time variations of the HATS-2 planetary system.

Rediscussion of eclipsing binaries. Paper XVII. The F-type twin system CW Eridani (2024)
Journal Article
Overall, S., & Southworth, J. (2024). Rediscussion of eclipsing binaries. Paper XVII. The F-type twin system CW Eridani. Observatory, 144(1299),

CW Eri is a detached eclipsing binary system of two F-type stars with an orbital period of 2728 d. Light-curves from two sectors of observations with the Transiting Exoplanet Survey Satellite (TESS) and previously published radial-velocity data are a... Read More about Rediscussion of eclipsing binaries. Paper XVII. The F-type twin system CW Eridani.

Looking for timing variations in the transits of 16 exoplanets (2024)
Journal Article
Yalçınkaya, S., Esmer, E. M., Baştürk, Ö., Muhaymin, A., Kutluay, A. C., Silistre, D. İ., …Yeşilyaprak, C. (in press). Looking for timing variations in the transits of 16 exoplanets. Monthly Notices of the Royal Astronomical Society, 530(3), 2475–2495. https://doi.org/10.1093/mnras/stae854

We update the ephemerides of 16 transiting exoplanets using our ground-based observations, new TESS data, and previously published observations including those of amateur astronomers. All these light curves were modeled by making use of a set of quan... Read More about Looking for timing variations in the transits of 16 exoplanets.

Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties (2024)
Journal Article
Tkachenko, A., Pavlovski, K., Serebriakova, N., Bowman, D. M., IJspeert, L., Gebruers, S., & Southworth, J. (2024). Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties. Astronomy & Astrophysics, 683, Article A252. https://doi.org/10.1051/0004-6361/202347793

Context. Eclipsing spectroscopic double-lined binaries are the prime source of precise and accurate measurements of masses and radii of stars. These measurements provide a stringent test for models of stellar evolution that are consistently reported... Read More about Observational mapping of the mass discrepancy in eclipsing binaries: Selection of the sample and its photometric and spectroscopic properties.

Rediscussion of eclipsing binaries. Paper XVI. The δ Scuti / γ Dor hybrid pulsator GK Draconis (2024)
Journal Article
Southworth, J. (2024). Rediscussion of eclipsing binaries. Paper XVI. The δ Scuti / γ Dor hybrid pulsator GK Draconis. Observatory, 144(1289),

GK Dra is a detached eclipsing binary system containing two early -F stars, one evolved, in an orbit with a period of 9974 d and a small eccentricity. Its eclipsing nature was discovered using Hipparcos data, and pulsations were found in follow-up gr... Read More about Rediscussion of eclipsing binaries. Paper XVI. The δ Scuti / γ Dor hybrid pulsator GK Draconis.

Optical Monitoring of the Didymos–Dimorphos Asteroid System with the Danish Telescope around the DART Mission Impact (2023)
Journal Article
Rożek, A., Snodgrass, C., Jørgensen, U. G., Pravec, P., Bonavita, M., Rabus, M., …Castillo Baeza, N. S. (2023). Optical Monitoring of the Didymos–Dimorphos Asteroid System with the Danish Telescope around the DART Mission Impact. The Planetary Science Journal, 4(12), Article 236. https://doi.org/10.3847/psj/ad0a64

The NASA’s Double-Asteroid Redirection Test (DART) was a unique planetary defence and technology test mission, the first of its kind. The main spacecraft of the DART mission impacted the target asteroid Dimorphos, a small moon orbiting the asteroid D... Read More about Optical Monitoring of the Didymos–Dimorphos Asteroid System with the Danish Telescope around the DART Mission Impact.

The enigmatic multiple star VV Ori (2023)
Journal Article
Budding, E., Southworth, J., Pavlovski, K., Rhodes, M. D., Zihao, W., Love, T., …Alexander, M. (in press). The enigmatic multiple star VV Ori. Monthly Notices of the Royal Astronomical Society, 527(3), 6389-6405. https://doi.org/10.1093/mnras/stad3586

New photometry, including TESS data, have been combined with recent spectroscopic observations of the Orion Ib pulsating triple-star system VV Ori. This yields a revised set of absolute parameters with increased precision. Two different programs were... Read More about The enigmatic multiple star VV Ori.

Physical properties of the eclipsing binary KIC 9851944 and analysis of its tidally-perturbed p- and g-mode pulsations (2023)
Journal Article
Jennings, Z., Southworth, J., Pavlovski, K., & Van Reeth, T. (in press). Physical properties of the eclipsing binary KIC 9851944 and analysis of its tidally-perturbed p- and g-mode pulsations. Monthly Notices of the Royal Astronomical Society, 527(2), 4052-4075. https://doi.org/10.1093/mnras/stad3427

Stars that are both pulsating and eclipsing offer an important opportunity to better understand many of the physical phenomena that occur in stars, because it is possible to measure the pulsation frequencies of stars for which the masses and radii ar... Read More about Physical properties of the eclipsing binary KIC 9851944 and analysis of its tidally-perturbed p- and g-mode pulsations.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 14: THE F-TYPE SYSTEM V570 PERSEI (2023)
Journal Article
Southworth, J. (2023). REDISCUSSION OF ECLIPSING BINARIES. PAPER 14: THE F-TYPE SYSTEM V570 PERSEI. Observatory,

V570 Per is a binary star system containing two F-type stars in a 1.90 d period circular orbit. It shows shallow partial eclipses that were discovered from its Hipparcos light curve. We present an analysis of this system based on two sectors of high-... Read More about REDISCUSSION OF ECLIPSING BINARIES. PAPER 14: THE F-TYPE SYSTEM V570 PERSEI.

TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars (2023)
Journal Article
Barkaoui, K., Timmermans, M., Soubkiou, A., Rackham, B. V., Burgasser, A. J., Chouqar, J., …Zúñiga-Fernández, S. (2023). TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars. Astronomy & Astrophysics, 677, Article A38. https://doi.org/10.1051/0004-6361/202346838

We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084 b, and TOI-4184 b. We characterized the host stars by combining spectra from Shane/Kast and Magellan/FIRE, spectral energy distribution analysis, and st... Read More about TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars.

OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event (2023)
Journal Article
Satoh, Y. K., Koshimoto, N., Bennett, D. P., Sumi, T., Rattenbury, N. J., Suzuki, D., …Spyratos, P. (2023). OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event. Astronomical Journal, 166(3), Article 116. https://doi.org/10.3847/1538-3881/ace908

We present an analysis of microlensing event OGLE-2019-BLG-0825. This event was identified as a planetary candidate by preliminary modeling. We find that significant residuals from the best-fit static binary-lens model exist and a xallarap effect can... Read More about OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters Arising from a Five-day Xallarap Effect in a Candidate Planetary Microlensing Event.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 13: THE F-TYPE TWIN SYSTEM IT CASSIOPEIAE (2023)
Journal Article
Southworth, J. (2023). REDISCUSSION OF ECLIPSING BINARIES. PAPER 13: THE F-TYPE TWIN SYSTEM IT CASSIOPEIAE. Observatory, 143(1294), 120-130

Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models. (2023)
Journal Article
Claret, A., & Southworth, J. (2023). Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models. Astronomy & Astrophysics, 674, Article A63. https://doi.org/10.1051/0004-6361/202346478

Context. The phenomenon of limb-darkening is relevant to many topics in astrophysics, including the analysis of light curves of eclipsing binaries, optical interferometry, measurement of stellar diameters, line profiles of rotating stars, gravitation... Read More about Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models..

High-mass eclipsing binaries: A testbed for models of interior structure and evolution Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen??? (2023)
Journal Article
Pavlovski, K., Southworth, J., Tkachenko, A., Van Reeth, T., & Tamajo, E. (2023). High-mass eclipsing binaries: A testbed for models of interior structure and evolution Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen???. Astronomy & Astrophysics, 671, Article A139. https://doi.org/10.1051/0004-6361/202244980

Aims: The surface chemical compositions of stars are affected by physical processes that bring the products of thermonuclear burning to the surface. Despite their potential in helping us understand the structure and evolution of stars, elemental abun... Read More about High-mass eclipsing binaries: A testbed for models of interior structure and evolution Accurate fundamental properties and surface chemical composition for V1034 Sco, GL Car, V573 Car, and V346 Cen???.

Tidally perturbed gravity-mode pulsations in a sample of close eclipsing binaries (2023)
Journal Article
Van Reeth, T., Johnston, C., Southworth, J., Fuller, J., Bowman, D., Poniatowski, L., & Van Beeck, J. (2023). Tidally perturbed gravity-mode pulsations in a sample of close eclipsing binaries. Astronomy & Astrophysics, 671, Article A121. https://doi.org/10.1051/0004-6361/202245460

Context. Thanks to the high-precision photometry from space missions such as Kepler and TESS, tidal perturbations and tilting of pulsations have been detected in more than a dozen binary systems. However, only two of these were gravity-mode (g-mode)... Read More about Tidally perturbed gravity-mode pulsations in a sample of close eclipsing binaries.

A precise blue-optical transmission spectrum from the ground: evidence for haze in the atmosphere of WASP-74b (2023)
Journal Article
Spyratos, P., Nikolov, N. K., Constantinou, S., Southworth, J., Madhusudhan, N., Sedaghati, E., …Mancini, L. (2023). A precise blue-optical transmission spectrum from the ground: evidence for haze in the atmosphere of WASP-74b. Monthly Notices of the Royal Astronomical Society, 521(2), 2163 - 2180. https://doi.org/10.1093/mnras/stad637

We report transmission spectroscopy of the bloated hot Jupiter WASP-74b in the wavelength range from 4000 to 6200 Å. We observe two transit events with the Very Large Telescope (VLT) Focal Reducer and Spectrograph and present a new method to measure... Read More about A precise blue-optical transmission spectrum from the ground: evidence for haze in the atmosphere of WASP-74b.

Revising the properties of low mass eclipsing binary stars using TESS light curves (2023)
Journal Article
Jennings, Z., Southworth, J., Maxted, P. F. L., & Mancini, L. (2023). Revising the properties of low mass eclipsing binary stars using TESS light curves. Monthly Notices of the Royal Astronomical Society, 521(3), 3405-3420. https://doi.org/10.1093/mnras/stad519

Precise measurements of stellar parameters are required in order to develop our theoretical understanding of stellar structure. These measurements enable errors and uncertainties to be quantified in theoretical models and constrain the physical inter... Read More about Revising the properties of low mass eclipsing binary stars using TESS light curves.