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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.

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???.