Outputs (181)

Fundamental effective temperature measurements for eclipsing binary stars – V. The circumbinary planet system EBLM J0608–59 (2024)
Journal Article
Maxted, P. F. L., Miller, N. J., Sebastian, D., Triaud, A. H. M. J., Martin, D. V., & Duck, A. (2024). Fundamental effective temperature measurements for eclipsing binary stars – V. The circumbinary planet system EBLM J0608–59. Monthly Notices of the Royal Astronomical Society, 531(4), 4577-4583. https://doi.org/10.1093/mnras/stae1434

EBLM J0608$-$59/TOI-1338/BEBOP-1 is a 12$^{\rm th}$-magnitude, F9 V star in an eclipsing binary with a much fainter M dwarf companion on a wide, eccentric orbit (P = 14.6 d). The binary is orbited by two circumbinary planets: one transiting on a 95-d... Read More about Fundamental effective temperature measurements for eclipsing binary stars – V. The circumbinary planet system EBLM J0608–59.

The EBLM Project XII. An eccentric, long-period eclipsing binary with a companion near the hydrogen-burning limit (2024)
Journal Article
Davis, Y. T., Triaud, A. H. M. J., Freckelton, A. V., Mortier, A., Brahm, R., Sebastian, D., …Udry, S. (2024). The EBLM Project XII. An eccentric, long-period eclipsing binary with a companion near the hydrogen-burning limit. Monthly Notices of the Royal Astronomical Society, 530(3), https://doi.org/10.1093/mnras/stae842

In the hunt for Earth-like exoplanets it is crucial to have reliable host star parameters, as they have a direct impact on the accuracy and precision of the inferred parameters for any discovered exoplanet. For stars with masses between 0.35 and 0.5... Read More about The EBLM Project XII. An eccentric, long-period eclipsing binary with a companion near the hydrogen-burning limit.

Magnetic origin of the discrepancy between stellar limb-darkening models and observations (2024)
Journal Article
Kostogryz, N. M., Shapiro, A. I., Witzke, V., Cameron, R. H., Gizon, L., Krivova, N. A., …Valenti, J. (in press). Magnetic origin of the discrepancy between stellar limb-darkening models and observations. Nature Astronomy, https://doi.org/10.1038/s41550-024-02252-5

Stars appear darker at their limbs than at their disk centres because at the limb we are viewing the higher and cooler layers of stellar photospheres. Yet, limb darkening derived from state-of-the-art stellar atmosphere models systematically fails to... Read More about Magnetic origin of the discrepancy between stellar limb-darkening models and observations.

The EBLM project – XIII. The absolute dynamical masses of the circumbinary planet host TOI-1338/BEBOP-1, and applications to the study of exoplanet atmospheres. (2024)
Journal Article
Sebastian, D., Triaud, A. H. M. J., Brogi, M., Baycroft, T. A., Standing, M. R., Maxted, P. F. L., …Nielsen, M. B. (2024). The EBLM project – XIII. The absolute dynamical masses of the circumbinary planet host TOI-1338/BEBOP-1, and applications to the study of exoplanet atmospheres. Monthly Notices of the Royal Astronomical Society, 530(3), 2572–2589. https://doi.org/10.1093/mnras/stae459

High-contrast eclipsing binaries with low mass M-dwarf secondaries are precise benchmark stars to build empirical mass-radius relationships for fully convective low-mass ($\rm M_{\star } < 0.35\, M_{\odot }$) dwarf stars. The contributed light... Read More about The EBLM project – XIII. The absolute dynamical masses of the circumbinary planet host TOI-1338/BEBOP-1, and applications to the study of exoplanet atmospheres..

Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b (2024)
Journal Article
Demangeon, O. D. S., Cubillos, P. E., Singh, V., Wilson, T. G., Carone, L., Bekkelien, A., …Walton, N. A. (2024). Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b. Astronomy & Astrophysics, 684, Article A27. https://doi.org/10.1051/0004-6361/202348270

Context. WASP-76 b has been a recurrent subject of study since the detection of a signature in high-resolution transit spectroscopy data indicating an asymmetry between the two limbs of the planet. The existence of this asymmetric signature has been... Read More about Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b.

Planets observed with CHEOPS: Two super-Earths orbiting the red dwarf star TOI-776 (2024)
Journal Article
Fridlund, M., Georgieva, I. Y., Bonfanti, A., Alibert, Y., Persson, C. M., Gandolfi, D., …Walton, N. A. (2024). Planets observed with CHEOPS: Two super-Earths orbiting the red dwarf star TOI-776. Astronomy & Astrophysics, 684, Article A12. https://doi.org/10.1051/0004-6361/202243838

Context. M-dwarf stars are the most common of potential exoplanet host stars in the Galaxy. It is therefore very important to understand planetary systems orbiting such stars and to determine the physical parameters of such planets with high precisio... Read More about Planets observed with CHEOPS: Two super-Earths orbiting the red dwarf star TOI-776.

CHEOPS observations of KELT-20 b/MASCARA-2 b: An aligned orbit and signs of variability from a reflective day side (2024)
Journal Article
Singh, V., Scandariato, G., Smith, A. M. S., Cubillos, P. E., Lendl, M., Billot, N., …Zingales, T. (2024). CHEOPS observations of KELT-20 b/MASCARA-2 b: An aligned orbit and signs of variability from a reflective day side. Astronomy & Astrophysics, 683, Article A1. https://doi.org/10.1051/0004-6361/202347533

Context. Occultations are windows of opportunity to indirectly peek into the dayside atmosphere of exoplanets. High-precision transit events provide information on the spin-orbit alignment of exoplanets around fast-rotating hosts. Aims. We aim to... Read More about CHEOPS observations of KELT-20 b/MASCARA-2 b: An aligned orbit and signs of variability from a reflective day side.

The EBLM Project– XI. Mass, radius, and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS (2024)
Journal Article
Swayne, M. I., Maxted, P. F. L., Triaud, A. H. M. J., Sousa, S. G., Deline, A., Ehrenreich, D., …Wilson, T. G. (2024). The EBLM Project– XI. Mass, radius, and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS. Monthly Notices of the Royal Astronomical Society, 528(4), 5703-5722. https://doi.org/10.1093/mnras/stad3866

Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This ‘radius inflation’ problem could have an impact on both stellar and exoplanetary scie... Read More about The EBLM Project– XI. Mass, radius, and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS.

Constraining the reflective properties of WASP-178 b using CHEOPS photometry (2024)
Journal Article
Pagano, I., Scandariato, G., Singh, V., Lendl, M., Queloz, D., Simon, A. E., …Walton, N. A. (2024). Constraining the reflective properties of WASP-178 b using CHEOPS photometry. Astronomy & Astrophysics, 682, Article A102. https://doi.org/10.1051/0004-6361/202346705

Context. Multiwavelength photometry of the secondary eclipses of extrasolar planets is able to disentangle the reflected and thermally emitted light radiated from the planetary dayside. Based on this, we can measure the planetary geometric albedo Ag,... Read More about Constraining the reflective properties of WASP-178 b using CHEOPS photometry.

Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley (2024)
Journal Article
Bonfanti, A., Brady, M., Wilson, T. G., Venturini, J., Egger, J. A., Brandeker, A., …Zingales, T. (2024). Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley. Astronomy & Astrophysics, 682, Article A66. https://doi.org/10.1051/0004-6361/202348180

Context. TOI-732 is an M dwarf hosting two transiting planets that are located on the two opposite sides of the radius valley. Inferring a reliable demographics for this type of systems is key to understanding their formation and evolution mechanisms... Read More about Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley.