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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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1 month ago Author:
Dirk van Dam, Matthew Kenworthy
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1 month ago
Title:
The black hole low mass X-ray binary V404 Cygni is part of a wide
hierarchical triple, and formed without a kick
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Author:
Kevin B. Burdge, Kareem El-Badry, Erin Kara, Claude Canizares, Deepto Chakrabarty, Anna Frebel, Sarah C. Millholland, Saul Rappaport et al.
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Votes: 1
1 month ago
Title:
Towards early-type eclipsing binaries as extragalactic milestones: III.
Physical properties of the O-type eclipsing binary OGLE LMC-ECL-21568 in a
quadruple system
(View PDF)
Author:
Mónica Taormina, R. -P. Kudritzki, B. Pilecki, G. Pietrzyński, I. B. Thompson, J. Puls, M. Górski, B. Zgirski et al.
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1 month ago Author:
Mark Popinchalk
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