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Charles L. Steinhardt
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1
(created 2024-05-17T17:01:23Z)
Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3
https://www.nature.com/articles/s41550-024-02271-2
Located at the bottom of the main sequence, ultracool dwarf stars are widespread in the solar neighbourhood. Nevertheless, their extremely low luminosity has left their planetary population largely unexplored, and only one of them, TRAPPIST-1, has so far been found to host a transiting planetary system. In this context, we present the SPECULOOS project’s detection of an Earth-sized planet in a 17 h orbit around an ultracool dwarf of M6.5 spectral type located 16.8 pc away. The planet’s high irradiation (16 times that of Earth) combined with the infrared luminosity and Jupiter-like size of its host star make it one of the most promising rocky exoplanet targets for detailed emission spectroscopy characterization with JWST. Indeed, our sensitivity study shows that just ten secondary eclipse observations with the Mid-InfraRed Instrument/Low-Resolution Spectrometer on board JWST should provide strong constraints on its atmospheric composition and/or surface mineralogy.
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Votes: 1
2 months ago
Title:
A perspective on the Milky Way Bulge-Bar as seen from the
neutron-capture elements Cerium and Neodymium with APOGEE
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Author:
J. V. Sales-Silva, K. Cunha, V. V. Smith, S. Daflon, D. Souto, R. Guerço, A. Queiroz, C. Chiappini et al.
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2 months ago
Title:
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on Three-body Interactions
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Author:
Gaia Fabj, Johan Samsing
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2 months ago
Title:
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and Cosmology
(View PDF)
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Matthew Ho, Deaglan J. Bartlett, Nicolas Chartier, Carolina Cuesta-Lazaro, Simon Ding, Axel Lapel, Pablo Lemos, Christopher C. Lovell et al.
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3 months ago
Title:
The SRG/eROSITA All-Sky Survey: Cosmology Constraints from Cluster
Abundances in the Western Galactic Hemisphere
(View PDF)
Author:
V. Ghirardini, E. Bulbul, E. Artis, N. Clerc, C. Garrel, S. Grandis, M. Kluge, A. Liu et al.
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