Skip to main content

Research Repository

Advanced Search

Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM (2023)
Journal Article
Rustamkulov, Z., Sing, D. K., Mukherjee, S., May, E. M., Kirk, J., Schlawin, E., Line, M. R., Piaulet, C., Carter, A. L., Batalha, N. E., Goyal, J. M., López-Morales, M., Lothringer, J. D., MacDonald, R. J., Moran, S. E., Stevenson, K. B., Wakeford, H. R., Espinoza, N., Bean, J. L., Batalha, N. M., …Zieba, S. (2023). Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM. Nature, 614, 659–663. https://doi.org/10.1038/s41586-022-05677-y

Transmission spectroscopy1,2,3 of exoplanets has revealed signatures of water vapor, aerosols, and alkali metals in a few dozen exoplanet atmospheres4,5. However, these previous inferences with the Hubble and Spitzer Space Telescopes were hindered by... Read More about Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM.

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.

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 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., Barbato, D., Biazzo, K., Borsato, L., Bruni, I., Damasso, M., Di Fabrizio, L., Evans, D. F., Granata, V., Lanza, A., Naponiello, L., Nascimbeni, V., Pinamonti, M., Sozzetti, A., Tregloan-Reed, J., …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.

A search for transit timing variations in the HATS-18 planetary system (2022)
Journal Article
Southworth, J., Barker, A. J., Hinse, T. C., Jongen, Y., Dominik, M., Jørgensen, U. G., Longa-Peña, P., Sajadian, S., Snodgrass, C., Tregloan-Reed, J., Bach-Møller, N., Bonavita, M., Bozza, V., Burgdorf, M. J., Figuera Jaimes, R., Helling, C., Hitchcock, J. A., Hundertmark, M., Khalouei, E., Korhonen, H., …Spyratos, P. (2022). A search for transit timing variations in the HATS-18 planetary system. Monthly Notices of the Royal Astronomical Society, 515(3), 3212-3223. https://doi.org/10.1093/mnras/stac1931

HATS-18 b is a transiting planet with a large mass and a short orbital period, and is one of the best candidates for the detection of orbital decay induced by tidal effects. We present extensive photometry of HATS-18 from which we measure 27 times of... Read More about A search for transit timing variations in the HATS-18 planetary system.

Fundamental effective temperature measurements for eclipsing binary stars – III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31 (2022)
Journal Article
Maxted, P. F. L., Miller, N. J., Hoyer, S., Adibekyan, V., Sousa, S. G., Billot, N., Fortier, A., Simon, A. E., Collier Cameron, A., Swayne, M. I., Gutermann, P., Triaud, A. H. M. J., Southworth, J., Alibert, Y., Alonso, R., Anglada, G., Bárczy, T., Barrado Navascues, D., Barros, S. C. C., Baumjohann, W., …Walton, N. (2022). Fundamental effective temperature measurements for eclipsing binary stars – III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31. Monthly Notices of the Royal Astronomical Society, 513(4), 6042-6057. https://doi.org/10.1093/mnras/stac1270

EBLM J0113+31 is a moderately bright (V = 10.1), metal-poor ([Fe/H] approximate to-0.3) GOV star with a much fainter M dwarf companion on a wide, eccentric orbit (= 14.3 d). We have used near-infrared spectroscopy obtained with the SPIRou spectrograp... Read More about Fundamental effective temperature measurements for eclipsing binary stars – III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31.

High-mass pulsators in eclipsing binaries observed using TESS (2022)
Journal Article
Southworth, J., & Bowman, D. M. (2022). High-mass pulsators in eclipsing binaries observed using TESS. Monthly Notices of the Royal Astronomical Society, 513(3), 3191-3209. https://doi.org/10.1093/mnras/stac875

Pulsations and binarity are both common features of massive stars. The study of pulsating massive stars in eclipsing binary systems holds great potential for constraining stellar structure and evolution theory. However, prior to the all-sky Transitin... Read More about High-mass pulsators in eclipsing binaries observed using TESS.

Homogeneous transit timing analyses of ten exoplanet systems (2022)
Journal Article
Baştürk, Ö., Esmer, E. M., Yalçınkaya, S., Torun, Ş., Mancini, L., Helweh, F., Karamanlı, E., Southworth, J., Aliş, S., Wünsche, A., Tezcan, F., Aladağ, Y., Aksaker, N., Tunç, E., Davoudi, F., Fişek, S., Bretton, M., Evans, D. F., Yeşilyaprak, C., Yılmaz, M., …Yelkenci, K. (2022). Homogeneous transit timing analyses of ten exoplanet systems. Monthly Notices of the Royal Astronomical Society, 512(2), 2062-2081. https://doi.org/10.1093/mnras/stac592

We study the transit timings of 10 exoplanets in order to investigate potential transit timing variations in them. We model their available ground-based light curves, some presented here and others taken from the literature, and homogeneously measure... Read More about Homogeneous transit timing analyses of ten exoplanet systems.

THE TRANSITING PLANETARY SYSTEM WASP-86/KELT-12: TESS PROVIDES THE CASTING VOTE (2022)
Journal Article
Southworth, J., & Faedi, F. (2022). THE TRANSITING PLANETARY SYSTEM WASP-86/KELT-12: TESS PROVIDES THE CASTING VOTE. Observatory, 142, 1 - 10

A transiting planetary system was discovered independently by two groups, under the names WASP-86 (Faedi et al.1) and KELT12 (Stevens et al.2). The properties of the system determined in these works were very different, most tellingly a variation of... Read More about THE TRANSITING PLANETARY SYSTEM WASP-86/KELT-12: TESS PROVIDES THE CASTING VOTE.

An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing (2022)
Journal Article
Sahu, K. C., Anderson, J., Casertano, S., Bond, H. E., Udalski, A., Dominik, M., Calamida, A., Bellini, A., Brown, T. M., Rejkuba, M., Bajaj, V., Kains, N., Ferguson, H. C., Fryer, C. L., Yock, P., Mróz, P., Kozłowski, S., Pietrukowicz, P., Poleski, R., Skowron, J., …Collaboration, R. (2022). An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing. Astrophysical Journal, 933(1),

We report the first unambiguous detection and mass measurement of an isolated stellar-mass black hole (BH). We used the Hubble Space Telescope (HST) to carry out precise astrometry of the source star of the long-duration (t_E ~ 270 days), high-magnif... Read More about An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing.

Parameters of the eclipsing binary a Draconis observed by TESS and SONG (2022)
Journal Article
Hey, D. R., Kochoska, A., Monier, R., Kochukhov, O., Johnston, C., Bedding, T. R., Murphy, S. J., Abdul-Masih, M., Southworth, J., Fredslund Andersen, M., Grundahl, F., & Pallé, P. L. (2022). Parameters of the eclipsing binary a Draconis observed by TESS and SONG. Monthly Notices of the Royal Astronomical Society, 511(2), 2648-2658. https://doi.org/10.1093/mnras/stac020

We present an analysis of the eclipsing single-lined spectroscopic binary system a Dra based on photometry from the Transiting Exoplanet Survey Satellite (TESS) mission and newly acquired spectroscopic measurements. Recently discovered to have eclips... Read More about Parameters of the eclipsing binary a Draconis observed by TESS and SONG.

The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties (2021)
Journal Article
Mancini, L., Southworth, J., Naponiello, L., Baştürk, Ö., Barbato, D., Biagiotti, F., Bruni, I., Cabona, L., D’Ago, G., Damasso, M., Erdem, A., Evans, D., Henning, T., Öztürk, O., Ricci, D., Sozzetti, A., Tregloan-Reed, J., & Yalçınkaya, S. (2022). The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties. Monthly Notices of the Royal Astronomical Society, 509(1), https://doi.org/10.1093/mnras/stab2691

<jats:title>Abstract</jats:title> <jats:p>We present broad-band photometry of 30 planetary transits of the ultra-hot Jupiter KELT-16 b, using five medium-class telescopes. The transits were monitored through standard B,?V,?R,?I filters and four were... Read More about The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties.

OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf (2021)
Journal Article
Kondo, I., Yee, J. C., Bennett, D. P., Sumi, T., Koshimoto, N., Bond, I. A., Gould, A., Udalski, A., Shvartzvald, Y., Kil Jung, Y., Zang, W., Bozza, V., Bachelet, E., Hundertmark, M. P., Rattenbury, N. J., Abe, F., Barry, R., Bhattacharya, A., Donachie, M., Fukui, A., …Saha, A. (2021). OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf. Astronomical Journal, 162(2), Article 77. https://doi.org/10.3847/1538-3881/ac00ba

We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet–host star mass ratio... Read More about OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 4: THE EVOLVED G-TYPE SYSTEM AN CAMELOPARDALIS (2021)
Journal Article
Taylor. (2021). REDISCUSSION OF ECLIPSING BINARIES. PAPER 4: THE EVOLVED G-TYPE SYSTEM AN CAMELOPARDALIS. Observatory, 141, 122 - 133

AN Cam is a little-studied eclipsing binary containing somewhat evolved components in an orbit with a period of 21(d).0 and an eccentricity of 0.47. A spectroscopic orbit based on photoelectric radial velocities was published in 1977. AN Cam has been... Read More about REDISCUSSION OF ECLIPSING BINARIES. PAPER 4: THE EVOLVED G-TYPE SYSTEM AN CAMELOPARDALIS.

The surface brightness–colour relations based on eclipsing binary stars and calibrated with Gaia EDR3 (2021)
Journal Article
Graczyk, D., Pietrzyński, G., Gałan, C., Gieren, W., Tkachenko, A., Anderson, R., Gallenne, A., Górski, M., Hajdu, G., Kałuszyński, M., Karczmarek, P., Kervella, P., Maxted, P., Nardetto, N., Narloch, W., Pavlovski, K., Pilecki, B., Pych, W., Southworth, J., Storm, J., …Konorski, P. (2021). The surface brightness–colour relations based on eclipsing binary stars and calibrated with Gaia EDR3. Astronomy & Astrophysics, 649, Article A109. https://doi.org/10.1051/0004-6361/202140571

Aims. The surface brightness–colour relation (SBCR) is a basic tool for establishing precise and accurate distances within the Local Group. Detached eclipsing binary stars with accurately determined radii and trigonometric parallaxes allow calibratio... Read More about The surface brightness–colour relations based on eclipsing binary stars and calibrated with Gaia EDR3.

The Nature of the Eccentric Double-lined Eclipsing Binary System KIC 2306740 with Kepler Space Photometry (2021)
Journal Article
Kocak, D., Yakut, K., Southworth, J., Eggleton, P. P., Icli, T., Tout, C. A., & Bloemen, S. (2021). The Nature of the Eccentric Double-lined Eclipsing Binary System KIC 2306740 with Kepler Space Photometry. Astrophysical Journal, 910(2), Article 111. https://doi.org/10.3847/1538-4357/abe546

We present a detailed study of KIC 2306740, an eccentric double-lined eclipsing binary system. Kepler satellite data were combined with spectroscopic data obtained with the 4.2 m William Herschel Telescope (WHT). This allowed us to determine precise... Read More about The Nature of the Eccentric Double-lined Eclipsing Binary System KIC 2306740 with Kepler Space Photometry.

A white dwarf bound to the transiting planetary system WASP-98 (2020)
Journal Article
Southworth, J., Tremblay, P., Gänsicke, B. T., Evans, D., & Močnik, T. (2020). A white dwarf bound to the transiting planetary system WASP-98. Monthly Notices of the Royal Astronomical Society, 497(4), 4416 - 4422. https://doi.org/10.1093/mnras/staa2328

WASP-98 is a planetary system containing a hot Jupiter transiting a late-G dwarf. A fainter star 12? distant has previously been identified as a white dwarf, with a distance and proper motion consistent with a physical association with the planetary... Read More about A white dwarf bound to the transiting planetary system WASP-98.