All Outputs (257)

Spectroscopic confirmation of the binary nature of the hybrid pulsator KIC 5709664 found with the frequency modulation method (2019)
Journal Article
Derekas, A., Murphy, S. J., Dálya, G., Szabó, R., Borkovits, T., Bókon, A., …Mészáros, S. (2019). Spectroscopic confirmation of the binary nature of the hybrid pulsator KIC 5709664 found with the frequency modulation method. Monthly Notices of the Royal Astronomical Society, 486(2), 2129-2136. https://doi.org/10.1093/mnras/stz875

We started a program to search for companions around hybrid δ Sct/γ Dor stars with the frequency modulation method using Kepler data. Our best candidate was KIC 5709664, where we could identify Fourier peaks with sidelobes, suggesting binary orbital... Read More about Spectroscopic confirmation of the binary nature of the hybrid pulsator KIC 5709664 found with the frequency modulation method.

Spitzer Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-rotating Low-mass Brown Dwarf (2019)
Journal Article
Shvartzvald, Y., Yee, J. C., Skowron, J., Lee, C., Udalski, A., Calchi Novati, S., …Southworth, J. (2019). Spitzer Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-rotating Low-mass Brown Dwarf. Astronomical Journal, 157(3), Article 106. https://doi.org/10.3847/1538-3881/aafe12

The kinematics of isolated brown dwarfs in the Galaxy, beyond the solar neighborhood, is virtually unknown. Microlensing has the potential to probe this hidden population, as it can measure both the mass and five of the six phase-space coordinates (a... Read More about Spitzer Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-rotating Low-mass Brown Dwarf.

OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source? (2019)
Journal Article
Dominik, M., Bachelet, E., Bozza, V., Street, R. A., Han, C., Hundertmark, M., …Kozłowski, S. (2019). OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source?. Monthly Notices of the Royal Astronomical Society, 484(4), 5608 - 5632. https://doi.org/10.1093/mnras/stz306

Discussing the particularly long gravitational microlensing event OGLE-2014-BLG-1186 with a time-scale tE ~ 300 d, we present a methodology for identifying the nature of localised deviations from single-lens point-source light curves, which ensures t... Read More about OGLE-2014-BLG-1186: gravitational microlensing providing evidence for a planet orbiting the foreground star or for a close binary source?.

The PDS 110 observing campaign – photometric and spectroscopic observations reveal eclipses are aperiodic (2019)
Journal Article
Osborn, H. P., Kenworthy, M., Rodriguez, J. E., de Mooij, E. J. W., Kennedy, G. M., Relles, H., …Zhou, G. (2019). The PDS 110 observing campaign – photometric and spectroscopic observations reveal eclipses are aperiodic. Monthly Notices of the Royal Astronomical Society, 485(2), 1614-1625. https://doi.org/10.1093/mnras/stz283

PDS 110 is a young disc-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011 (KELT), consistent with an object in a closed periodic orbit. In this paper, we present data from a... Read More about The PDS 110 observing campaign – photometric and spectroscopic observations reveal eclipses are aperiodic.

Deciphering the atmosphere of HAT-P-12b: solving discrepant results (2018)
Journal Article
Alexoudi, X., Mallonn, M., von Essen, C., Turner, J., Keles, E., Southworth, J., …Strassmeier, K. (2018). Deciphering the atmosphere of HAT-P-12b: solving discrepant results. Astronomy & Astrophysics, 620, Article A142. https://doi.org/10.1051/0004-6361/201833691

Context. Two independent investigations of the atmosphere of the hot Jupiter HAT-P-12b by two different groups resulted in discrepant solutions. Using broad-band photometry from the ground, one study found a flat and featureless transmission spectrum... Read More about Deciphering the atmosphere of HAT-P-12b: solving discrepant results.

WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts (2018)
Journal Article
Lendl, M., Anderson, D. R., Bonfanti, A., Bouchy, F., Burdanov, A., Collier Cameron, A., …West, R. G. (2019). WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts. Monthly Notices of the Royal Astronomical Society, 482(1), 301 -312. https://doi.org/10.1093/mnras/sty2667

We report the discovery of four transiting hot Jupiters, WASP-147, WASP-160B, WASP-164, and WASP-165 from the WASP survey. WASP-147b is a near Saturn-mass (MP = 0.28MJ) object with a radius of 1.11RJ orbiting a G4 star with a period of 4.6 d. WASP-16... Read More about WASP-147b, 160Bb, 164b, and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts.

Evidence for conservative mass transfer in the classical Algol system d Librae from its surface carbon-to-nitrogen abundance ratio (2018)
Journal Article
Dervişoğlu, A., Pavlovski, K., Lehmann, H., Southworth, J., & Bewsher, D. (2018). Evidence for conservative mass transfer in the classical Algol system d Librae from its surface carbon-to-nitrogen abundance ratio. Monthly Notices of the Royal Astronomical Society, 481(4), 5660 -5674. https://doi.org/10.1093/mnras/sty2684

Algol-type binary systems are the product of rapid mass transfer between the initially more massive component to its companion. It is still unknown whether the process is conservative, or whether substantial mass is lost from the system. The history... Read More about Evidence for conservative mass transfer in the classical Algol system d Librae from its surface carbon-to-nitrogen abundance ratio.

The Transiting Exoplanet Community Early Release Science Program for JWST (2018)
Journal Article
Bean, J. L., Stevenson, K. B., Batalha, N. M., Berta-Thompson, Z., Kreidberg, L., Crouzet, N., …Zingales, T. (2018). The Transiting Exoplanet Community Early Release Science Program for JWST. Publications of the Astronomical Society of the Pacific, 130(993), Article 114402. https://doi.org/10.1088/1538-3873/aadbf3

The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. How... Read More about The Transiting Exoplanet Community Early Release Science Program for JWST.

Physical properties and CNO abundances for high-mass stars in four main-sequence detached eclipsing binaries: V478 Cyg, AH Cep, V453 Cyg, and V578 Mon (2018)
Journal Article
Pavlovski, K., Southworth, J., & Tamajo, E. (2018). Physical properties and CNO abundances for high-mass stars in four main-sequence detached eclipsing binaries: V478 Cyg, AH Cep, V453 Cyg, and V578 Mon. Monthly Notices of the Royal Astronomical Society, 481(3), 3129 -3147. https://doi.org/10.1093/mnras/sty2516

We present ten high-precision light curves of four transits in the XO-1 planetary system, obtained using u, g, r, redshifted Ha, I and z filters. We use these to measure the physical properties, orbital ephemeris, and a transmission spectrum of the p... Read More about Physical properties and CNO abundances for high-mass stars in four main-sequence detached eclipsing binaries: V478 Cyg, AH Cep, V453 Cyg, and V578 Mon.

Physical properties and optical-infrared transmission spectrum of the giant planet XO-1 b (2018)
Journal Article
Southworth, J., Tregloan-Reed, J., Pinhas, A., Madhusudhan, N., Mancini, L., & Smith, A. M. S. (2018). Physical properties and optical-infrared transmission spectrum of the giant planet XO-1 b. Monthly Notices of the Royal Astronomical Society, 481(3), 3129-3147. https://doi.org/10.1093/mnras/sty2488

A prerequisite for probing theoretical evolutionary models for high-mass stars is the determination of stellar physical properties with a high accuracy. We do this for three binary systems containing components with masses above 10?M?: V478?Cyg, AH?C... Read More about Physical properties and optical-infrared transmission spectrum of the giant planet XO-1 b.

Infrared spectroscopy of the merger candidate KIC 9832227 (2018)
Journal Article
Pavlenko, Y., Evans, A., Banerjee, D., Southworth, J., Shahbandeh, M., & Davis, S. (2018). Infrared spectroscopy of the merger candidate KIC 9832227. Astronomy and Astrophysics, 615, Article A120. https://doi.org/10.1051/0004-6361/201832717

Context. It has been predicted that the object KIC 9832227 – a contact binary star – will undergo a merger in 2022.2±0.7.We describe the near infrared spectrum of this object as an impetus to obtain pre-merger data. Aims. We aim to characterise (i)... Read More about Infrared spectroscopy of the merger candidate KIC 9832227.

WASP-104b is darker than charcoal (2018)
Journal Article
Močnik, T., Hellier, C., & Southworth, J. (2018). WASP-104b is darker than charcoal. Astronomical Journal, 156(2), Article 44. https://doi.org/10.3847/1538-3881/aacb26

By analyzing the K2 short-cadence data from Campaign 14, we detect phase-curve modulation in the light curve of the hot-Jupiter host star WASP-104. The ellipsoidal modulation is detected with high significance and in agreement with theoretical expect... Read More about WASP-104b is darker than charcoal.

The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60 (2018)
Journal Article
Mancini, L., Esposito, M., Covino, E., Southworth, J., Biazzo, K., Bruni, I., …Henning, T. (2018). The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60. Astronomy & Astrophysics, 613, Article A41. https://doi.org/10.1051/0004-6361/201732234

Context. The measurement of the orbital obliquity of hot Jupiters with different physical characteristics can provide clues to the mechanisms of migration and orbital evolution of this particular class of giant exoplanets. Aims. We aim to derive t... Read More about The GAPS programme with HARPS-N at TNG XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60.

Oscillating red giants in eclipsing binary systems: empirical reference value for asteroseismic scaling relation (2018)
Journal Article
Themeßl, N., Hekker, S., Southworth, J., Beck, P. G., Pavlovski, K., Tkachenko, A., …Kallinger, T. (2018). Oscillating red giants in eclipsing binary systems: empirical reference value for asteroseismic scaling relation. Monthly Notices of the Royal Astronomical Society, 478(4), 4669 -4696. https://doi.org/10.1093/mnras/sty1113

Based on 1460?d of Kepler observations we perform a thorough asteroseismic study to probe the stellar parameters and evolutionary stages of three red giants in eclipsing binary systems. We present the first detailed analysis of individual oscillation... Read More about Oscillating red giants in eclipsing binary systems: empirical reference value for asteroseismic scaling relation.

OGLE-2017-BLG-1434Lb: Eighth q < 1 x 10(-4) Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function (2018)
Journal Article
Udalski, A., Ryu, Y., Sajadian, S., Gould, A., Mróz, P., Poleski, R., …von Essen, C. (2018). OGLE-2017-BLG-1434Lb: Eighth q < 1 x 10(-4) Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function. Acta Astronomica, 68(1), 1 -42. https://doi.org/10.32023/0001-5237/68.1.1

We report the discovery of a cold Super-Earth planet (m(p) = 4.4 +/- 0.5 M-circle plus) orbiting a low-mass (M = 0.23 +/- 0.03 M-circle dot) M dwarf at projected separation a(perpendicular to) l = 1.18 +/- 0.10 a.u., i.e., about 1.9 times the distanc... Read More about OGLE-2017-BLG-1434Lb: Eighth q < 1 x 10(-4) Mass-Ratio Microlens Planet Confirms Turnover in Planet Mass-Ratio Function.

High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016 (2018)
Journal Article
Evans, D., Southworth, J., Smalley, B., Jørgensen, U., Dominik, M., Andersen, M., …Wertz, O. (2018). High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016. Astronomy and Astrophysics, 610, Article A20. https://doi.org/10.1051/0004-6361/201731855

Context. The formation and dynamical history of hot Jupiters is currently debated, with wide stellar binaries having been suggested as a potential formation pathway. Additionally, contaminating light from both binary companions and unassociated star... Read More about High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016.

OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary (2018)
Journal Article
Ryu, Y., Yee, J., Udalski, A., Bond, I., Shvartzvald, Y., Zang, W., …von Essen, C. (2018). OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary. Astronomical Journal, 155(1), Article 40. https://doi.org/10.3847/1538-3881/aa9be4

We report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar, an assignation that can be confirmed by two epochs of high-resolution imaging of the combined source–lens baseline... Read More about OGLE-2016-BLG-1190Lb: The First Spitzer Bulge Planet Lies Near the Planet/Brown-dwarf Boundary.

Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32 A b from multiband photometry (2017)
Journal Article
Tregloan-Reed, J., Southworth, J., Mancini, L., Mollière, P., Ciceri, S., Bruni, I., …Henning, T. (2018). Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32 A b from multiband photometry. Monthly Notices of the Royal Astronomical Society, 474(4), 5485 - 5499. https://doi.org/10.1093/mnras/stx3147

We present high-precision photometry of eight separate transit events in the HAT-P-32 planetary system. One transit event was observed simultaneously by two telescopes of which one obtained a simultaneous multiband light curve in three optical bands,... Read More about Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32 A b from multiband photometry.

Recurring sets of recurring starspots on exoplanet-host Qatar-2 (2017)
Journal Article
Močnik, T., Southworth, J., & Hellier, C. (2017). Recurring sets of recurring starspots on exoplanet-host Qatar-2. Monthly Notices of the Royal Astronomical Society, 471(1), 394-403. https://doi.org/10.1093/mnras/stx1557

We announce the detection of recurring sets of recurring starspot occultation events in the short-cadence K2 light curve of Qatar-2, a K dwarf star transited every 1.34 d by a hot Jupiter. In total, we detect 34 individual starspot occultation events... Read More about Recurring sets of recurring starspots on exoplanet-host Qatar-2.

The GAPS Programme with HARPS-N at TNG XIII. The orbital obliquity of three close-in massive planets hosted by dwarf K-type stars: WASP-43, HAT-P-20 and Qatar-2 (2017)
Journal Article
Esposito, M., Covino, E., Desidera, S., Mancini, L., Nascimbeni, V., Zanmar Sanchez, R., …Turner, O. (2017). The GAPS Programme with HARPS-N at TNG XIII. The orbital obliquity of three close-in massive planets hosted by dwarf K-type stars: WASP-43, HAT-P-20 and Qatar-2. Astronomy & Astrophysics, 601, Article A53. https://doi.org/10.1051/0004-6361/201629720

Context. The orbital obliquity of planets with respect to the rotational axis of their host stars is a relevant parameter for the characterization of the global architecture of planetary systems and a key observational constraint to discriminate betw... Read More about The GAPS Programme with HARPS-N at TNG XIII. The orbital obliquity of three close-in massive planets hosted by dwarf K-type stars: WASP-43, HAT-P-20 and Qatar-2.