Skip to main content

Research Repository

Advanced Search

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.

Physical properties of near-Earth asteroid (2102) Tantalus from multiwavelength observations (2022)
Journal Article
Rożek, A., Lowry, S. C., Rozitis, B., Dover, L. R., Taylor, P. A., Virkki, A., Green, S. F., Snodgrass, C., Fitzsimmons, A., Campbell-White, J., Sajadian, S., Bozza, V., Burgdorf, M. J., Dominik, M., Figuera Jaimes, R., Hinse, T. C., Hundertmark, M., Jørgensen, U. G., Longa-Peña, P., Rabus, M., …Southworth, J. (2022). Physical properties of near-Earth asteroid (2102) Tantalus from multiwavelength observations. Monthly Notices of the Royal Astronomical Society, 515(3), 4551 - 4564. https://doi.org/10.1093/mnras/stac1835

Between 2010 and 2017, we have collected new optical and radar observations of the potentially hazardous asteroid (2102) Tantalus from the ESO NTT and Danish telescopes at the La Silla Observatory, and from the Arecibo planetary radar. The object app... Read More about Physical properties of near-Earth asteroid (2102) Tantalus from multiwavelength observations.

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.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS (2021)
Journal Article
Taylor. (2021). REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS. Observatory, 141, 282

RR Lyn is a detached eclipsing binary with a 9.95 d orbit containing two A-stars: one metallic-lined and one possibly metal-poor. We use the light curve from the TESS satellite and two sets of published radial velocity measurements to determine the p... Read More about REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 6: THE F-TYPE SYSTEM V505 PERSEI (2021)
Journal Article
Taylor. (2021). REDISCUSSION OF ECLIPSING BINARIES. PAPER 6: THE F-TYPE SYSTEM V505 PERSEI. Observatory, 141(1295), 234 - 245. https://doi.org/10.48550/arXiv.2106.04323

V505 Per is a detached eclipsing binary containing two F5 V stars in a 4.22 d circular orbit. We use a light curve from the TESS satellite and published radial velocity measurements to establish the properties of the system to high precision. The mas... Read More about REDISCUSSION OF ECLIPSING BINARIES. PAPER 6: THE F-TYPE SYSTEM V505 PERSEI.

Space-Based Photometry of Binary Stars: From Voyager to TESS (2021)
Journal Article
Southworth, J. (2021). Space-Based Photometry of Binary Stars: From Voyager to TESS. Universe, 7(10), 369 - 369

Binary stars are crucial laboratories for stellar physics, so have been photometric targets for space missions beginning with the very first orbiting telescope (OAO-2) launched in 1968. This review traces the binary stars observed and the scientific... Read More about Space-Based Photometry of Binary Stars: From Voyager to TESS.

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.

Transmission spectroscopy with VLT FORS2: a featureless spectrum for the low-density transiting exoplanet WASP-88b (2021)
Journal Article
Spyratos, P., Nikolov, N., Southworth, J., Constantinou, S., Madhusudhan, N., Carter, A. L., de Mooij, E. J. W., Fortney, J. J., Gibson, N. P., Goyal, J. M., Helling, C., Mayne, N. J., & Mikal-Evans, T. (2021). Transmission spectroscopy with VLT FORS2: a featureless spectrum for the low-density transiting exoplanet WASP-88b. Monthly Notices of the Royal Astronomical Society, 506(2), 2853-2870. https://doi.org/10.1093/mnras/stab1847

We present ground-based optical transmission spectroscopy of the low-density hot Jupiter WASP-88b covering the wavelength range 4413 - 8333 Å with the FORS2 spectrograph on the Very Large Telescope. The FORS2 white light curves exhibit a significant... Read More about Transmission spectroscopy with VLT FORS2: a featureless spectrum for the low-density transiting exoplanet WASP-88b.

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.

Rediscussion Of Eclipsing Binaries. Paper 2: The Eccentric Solar-type System KX Cancri (2021)
Journal Article
Taylor. (2021). Rediscussion Of Eclipsing Binaries. Paper 2: The Eccentric Solar-type System KX Cancri. Observatory, 141, 22 - 31

KX Cancri is an eclipsing binary containing two G-type stars with an orbital period of 31.2 d and an eccentricity of 0.47. These qualities make it a promising candidate for a benchmark solar-type binary system. We analyse the first light curve of thi... Read More about Rediscussion Of Eclipsing Binaries. Paper 2: The Eccentric Solar-type System KX Cancri.