Outputs (135)

GJ 238 b: A 0.57 Earth Radius Planet Orbiting an M2.5 Dwarf Star at 15.2 pc (2024)
Journal Article
Tey, E., Shporer, A., Lin, Z., Stassun, K. G., Lissauer, J. J., Hellier, C., …Jenkins, J. M. (2024). GJ 238 b: A 0.57 Earth Radius Planet Orbiting an M2.5 Dwarf Star at 15.2 pc. Astronomical Journal, 167(6), Article 283. https://doi.org/10.3847/1538-3881/ad3df1

We report the discovery of the transiting planet GJ 238 b, with a radius of 0.566 ± 0.014 R ⊕ (1.064 ± 0.026 times the radius of Mars) and an orbital period of 1.74 days. The transit signal was detected by the TESS mission and designated TOI-486.01.... Read More about GJ 238 b: A 0.57 Earth Radius Planet Orbiting an M2.5 Dwarf Star at 15.2 pc.

Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy (2024)
Journal Article
Kuzuhara, M., Fukui, A., Livingston, J. H., Caballero, J. A., de Leon, J. P., Hirano, T., …Zapatero Osorio, M. R. (2024). Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy. Astrophysical Journal Letters, 967(2), Article L21. https://doi.org/10.3847/2041-8213/ad3642

Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observations. However, the number of such planets receiving low insolation i... Read More about Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy.

Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST (2024)
Journal Article
Hord, B. J., Kempton, E. M., M. Evans-Soma, T., Latham, D. W., Ciardi, D. R., Dragomir, D., …Zucker, S. (2024). Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST. Astronomical Journal, 167(5), Article 233. https://doi.org/10.3847/1538-3881/ad3068

JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5000 confirmed planets, more than 4000 Transiting Exoplanet Survey Satellite (TESS) planet candidates are still unconfirmed and many of... Read More about Identification of the Top TESS Objects of Interest for Atmospheric Characterization of Transiting Exoplanets with JWST.

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.

The GAPS programme at TNG: L. TOI-4515 b: An eccentric warm Jupiter orbiting a 1.2 Gyr-old G-star (2024)
Journal Article
Carleo, I., Malavolta, L., Desidera, S., Nardiello, D., Wang, S., Turrini, D., …Zingales, T. (2024). The GAPS programme at TNG: L. TOI-4515 b: An eccentric warm Jupiter orbiting a 1.2 Gyr-old G-star. Astronomy & Astrophysics, 682, Article A135. https://doi.org/10.1051/0004-6361/202348207

Context. Different theories have been developed to explain the origins and properties of close-in giant planets, but none of them alone can explain all of the properties of the warm Jupiters (WJs, Porb = 10–200 days). One of the most intriguing chara... Read More about The GAPS programme at TNG: L. TOI-4515 b: An eccentric warm Jupiter orbiting a 1.2 Gyr-old G-star.

TOI-544 b: a potential water-world inside the radius valley in a two-planet system (2023)
Journal Article
Osborne, H. L. M., Van Eylen, V., Goffo, E., Gandolfi, D., Nowak, G., Persson, C. M., …Lam, K. W. F. (in press). TOI-544 b: a potential water-world inside the radius valley in a two-planet system. Monthly Notices of the Royal Astronomical Society, 527(4), 11138-11157. https://doi.org/10.1093/mnras/stad3837

We report on the precise radial velocity follow-up of TOI-544 (HD 290498), a bright K star (V=10.8), which hosts a small transiting planet recently discovered by the Transiting Exoplanet Survey Satellite (TESS). We collected 122 high-resolution HARPS... Read More about TOI-544 b: a potential water-world inside the radius valley in a two-planet system.

Giant Outer Transiting Exoplanet Mass (GOT ’EM) Survey. III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-transit Jupiter Orbiting TOI-2010 (2023)
Journal Article
Mann, C. R., Dalba, P. A., Lafrenière, D., Fulton, B. J., Hébrard, G., Boisse, I., …Ting, E. B. (2023). Giant Outer Transiting Exoplanet Mass (GOT ’EM) Survey. III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-transit Jupiter Orbiting TOI-2010. Astronomical Journal, 166(6), Article 239. https://doi.org/10.3847/1538-3881/ad00bc

Large-scale exoplanet surveys like the Transiting Exoplanet Survey Satellite (TESS) mission are powerful tools for discovering large numbers of exoplanet candidates. Single-transit events are commonplace within the resulting candidate list due to the... Read More about Giant Outer Transiting Exoplanet Mass (GOT ’EM) Survey. III. Recovery and Confirmation of a Temperate, Mildly Eccentric, Single-transit Jupiter Orbiting TOI-2010.

TOI-858 B b: A hot Jupiter on a polar orbit in a loose binary (2023)
Journal Article
Hagelberg, J., Nielsen, L. D., Attia, O., Bourrier, V., Pearce, L., Venturini, J., …Ziegler, C. (2023). TOI-858 B b: A hot Jupiter on a polar orbit in a loose binary. Astronomy & Astrophysics, 679, Article A70. https://doi.org/10.1051/0004-6361/202244940

We report the discovery of a hot Jupiter on a 3.28-day orbit around a 1.08 M⊙ G0 star that is the secondary component in a loose binary system. Based on follow-up radial velocity observations of TOI-858 B with CORALIE on the Swiss 1.2 m telescope and... Read More about TOI-858 B b: A hot Jupiter on a polar orbit in a loose binary.

TESS giants transiting giants V - Two hot Jupiters orbiting red-giant hosts (2023)
Journal Article
Pereira, F., Grunblatt, S. K., Psaridi, A., Campante, T. L., Cunha, M. S., Santos, N. C., …Huber, D. (in press). TESS giants transiting giants V - Two hot Jupiters orbiting red-giant hosts. Monthly Notices of the Royal Astronomical Society, 527(3), 6332-6345. https://doi.org/10.1093/mnras/stad3449

In this work we present the discovery and confirmation of two hot Jupiters orbiting red-giant stars, TOI-4377 b and TOI-4551 b, observed by TESS in the southern ecliptic hemisphere and later followed-up with radial-velocity (RV) observations. For TOI... Read More about TESS giants transiting giants V - Two hot Jupiters orbiting red-giant hosts.

A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134 (2023)
Journal Article
Rescigno, F., Hébrard, G., Vanderburg, A., Mann, A. W., Mortier, A., Morrell, S., …Forés-Toribio, R. (in press). A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134. Monthly Notices of the Royal Astronomical Society, 527(3), 5385-5407. https://doi.org/10.1093/mnras/stad3255

We present the characterisation of an inner mini-Neptune in a 9.2292005±0.0000063 day orbit and an outer mono-transiting sub-Saturn planet in a 95.50$^{+0.36}_{-0.25}$ day orbit around the moderately active, bright (mv = 8.9 mag) K5V star TOI-2134. B... Read More about A hot mini-Neptune and a temperate, highly eccentric sub-Saturn around the bright K-dwarf TOI-2134.