Next meeting:
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3 months ago
Title: Planets larger than Neptune have elevated eccentricities
Link: https://doi.org/10.1073/pnas.2405295122
Description: New PNAS paper showing that larger planets within 100-day orbital period have higher eccentricity.
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9 months ago
Title: Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3
Link: https://www.nature.com/articles/s41550-024-02271-2
Description: 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 year ago
Title: Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry
Link: https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202449763
Description:
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2 years ago
Title: Orbital Period Change of Dimorphos Due to the DART Kinetic Impact
Link: https://www.nature.com/articles/s41586-023-05805-2
Description:
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3 years ago
Title: JWST in focus
Link: https://blogs.nasa.gov/webb/
Description:
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3 years ago
Title: Exocomet size distribution for beta pictoris
Link: https://arxiv.org/abs/2204.13618
Description: (For some reason this arXiv listing didn't show up in benty search.)
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3 years ago
Title: Show your work
Link: https://twitter.com/rodluger/status/1448650865145901070?s=20
Description: Open-source method for creating reproducible scientific papers developed by Rodrigo Luger.
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3 years ago
Title: Nature paper on white dwarf with a Jupiter analog
Link: https://www.nature.com/articles/s41586-021-03869-6
Description:
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5 years ago
Title: A noninteracting low-mass black hole–giant star binary system
Link: https://science.sciencemag.org/content/366/6465/637
Description: Black hole binary systems with companion stars are typically found via their x-ray emission, generated by interaction and accretion. Noninteracting binaries are expected to be plentiful in the Galaxy but must be observed using other methods. We combine radial velocity and photometric variability data to show that the bright, rapidly rotating giant star 2MASS J05215658+4359220 is in a binary system with a massive unseen companion. The system has an orbital period of ~83 days and near-zero eccentricity. The photometric variability period of the giant is consistent with the orbital period, indicating star spots and tidal synchronization. Constraints on the giant’s mass and radius imply that the unseen companion is 3.3+2.8−0.7 solar masses, indicating that it is a noninteracting low-mass black hole or an unexpectedly massive neutron star.
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