BDNYC Member Paper Reveals Stormy Atmospheres of Young Brown Dwarfs

As one of the last large programs carried out by the Spitzer Space Telescope (Spitzer GO 14128 led by PI J. Faherty) prior to its retirement in 2020, a new survey for photometric variability in young, low-mass brown dwarfs will now pave the way for future searches for cloud-driven variability in directly-imaged exoplanets with next-generation telescopes.

Dr. Johanna Vos and a team of investigators have recently published the findings of their survey in a paper titled “Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope,” with promising results.

The survey detected new variable objects with a range of rotation periods and variability amplitudes, across a variety of temperatures. Blue points show the measured brightness and the pink line shows the best fit variable model.

The survey detected new variable objects with a range of rotation periods and variability amplitudes, across a variety of temperatures. Blue points show the measured brightness and the pink line shows the best fit variable model.

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The 14 Herculis System: A Planetary Dynamical Crime Scene

The X-shaped set of orbits in 14 Her.

The X-shaped set of orbits in 14 Her.

The forensic evidence left in the 14 Her giant planetary system suggests an active dynamical past. Two giant planets, several times more massive than Jupiter, in highly eccentric orbits around a solar-type star were found orbiting at nearly right angles to each other. In the recently published paper “14 Her: a likely case of planet-planet scattering,” Daniella Bardalez Gagliuffi—a senior member of the Brown Dwarfs in New York City Research Group (BDNYC) based at the American Museum of Natural History (AMNH)—along with a team of orbital investigators measured the full architecture of the two-planet system around the nearby K0 dwarf 14 Herculis, with some surprising results.

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BDNYC Team Submission Selected for NASA’s XRP Grant

The BDNYC team’s project proposal entitled “Read Between the Lines: Determining Atmosphere and Bulk Compositions for Planetary Mass Objects Using Spectral Retrievals” was selected for a NASA Exoplanets Research Program (XRP) grant.

Parameters to consider in spectral retrievals of directly-imaged exoplanet atmospheres. These include a  parameterized P-T profile, gas species (pink), various cloud models (center grey), and a disequilibrium chemistry option (aqua).

Parameters to consider in spectral retrievals of directly-imaged exoplanet atmospheres. These include a parameterized P-T profile, gas species (pink), various cloud models (center grey), and a disequilibrium chemistry option (aqua).

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BDNYC Members Help Lead Pilot Education Program CosmoAmautas

No matter where we live in the world, to look up at the night sky and wonder about our place in the universe is human. “We are all looking at the same sky,” says Lisseth Gonzales Quevedo, a Bachelor of Physics at Universidad Nacional Mayor de San Marcos (UNMSM) in Lima, Peru. It is through this inherently human fascination for the universe that two BDNYC members are helping to bring scientific thought to the children and youth of Peru.

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BDNYC Members Announce Grad School Decisions

The BDNYC team is delighted to share the graduate school decisions of three of our members: Elena Litvinova Mitra, Jose I. Adorno, and Austin Rothermich.

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