Bibcode
Cadieux, Charles; Doyon, René; Plotnykov, Mykhaylo; Hébrard, Guillaume; Jahandar, Farbod; Artigau, Étienne; Valencia, Diana; Cook, Neil J.; Martioli, Eder; Vandal, Thomas; Donati, Jean-François; Cloutier, Ryan; Narita, Norio; Fukui, Akihiko; Hirano, Teruyuki; Bouchy, François; Cowan, Nicolas B.; Gonzales, Erica J.; Ciardi, David R.; Stassun, Keivan G.; Arnold, Luc; Benneke, Björn; Boisse, Isabelle; Bonfils, Xavier; Carmona, Andrés; Cortés-Zuleta, Pía; Delfosse, Xavier; Forveille, Thierry; Fouqué, Pascal; da Silva, João Gomes; Jenkins, Jon M.; Kiefer, Flavien; Kóspál, Ágnes; Lafrenière, David; Martins, Jorge H. C.; Moutou, Claire; do Nascimento, J. -D.; Ould-Elhkim, Merwan; Pelletier, Stefan; Twicken, Joseph D.; Bouma, Luke G.; Cartwright, Scott; Darveau-Bernier, Antoine; Grankin, Konstantin; Ikoma, Masahiro; Kagetani, Taiki; Kawauchi, Kiyoe; Kodama, Takanori; Kotani, Takayuki; Latham, David W.; Menou, Kristen; Ricker, George; Seager, Sara; Tamura, Motohide; Vanderspek, Roland; Watanabe, Noriharu
Referencia bibliográfica
The Astronomical Journal
Fecha de publicación:
9
2022
Número de citas
25
Número de citas referidas
24
Descripción
Exploring the properties of exoplanets near or inside the radius valley provides insight on the transition from the rocky super-Earths to the larger, hydrogen-rich atmosphere mini-Neptunes. Here, we report the discovery of TOI-1452b, a transiting super-Earth (R p = 1.67 ± 0.07 R ⊕) in an 11.1 day temperate orbit (T eq = 326 ± 7 K) around the primary member (H = 10.0, T eff = 3185 ± 50 K) of a nearby visual-binary M dwarf. The transits were first detected by the Transiting Exoplanet Survey Satellite, then successfully isolated between the two 3.″2 companions with ground-based photometry from the Observatoire du Mont-Mégantic and MuSCAT3. The planetary nature of TOI-1452b was established through high-precision velocimetry with the near-infrared SPIRou spectropolarimeter as part of the ongoing SPIRou Legacy Survey. The measured planetary mass (4.8 ± 1.3 M ⊕) and inferred bulk density ( ${5.6}_{-1.6}^{+1.8}$ g cm-3) is suggestive of a rocky core surrounded by a volatile-rich envelope. More quantitatively, the mass and radius of TOI-1452b, combined with the stellar abundance of refractory elements (Fe, Mg, and Si) measured by SPIRou, is consistent with a core-mass fraction of 18% ± 6% and a water-mass fraction of ${22}_{-13}^{+21}$ %. The water world candidate TOI-1452b is a prime target for future atmospheric characterization with JWST, featuring a transmission spectroscopy metric similar to other well-known temperate small planets such as LHS 1140b and K2-18 b. The system is located near Webb's northern continuous viewing zone, implying that is can be followed at almost any moment of the year.
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Exoplanetas y Astrobiología
La búsqueda de vida en el Universo se ha visto impulsada por los recientes descubrimientos de planetas alrededor de otras estrellas (los llamados exoplanetas), convirtiéndose en uno de los campos más activos dentro de la Astrofísica moderna. En los últimos años los descubrimientos cada vez más numerosos de nuevos exoplanetas y los últimos avances
Enric
Pallé Bago