#browndwarfs

The detection of phosphine has recently generated considerable excitement within the astronomical community. Initially driven by its controversial presence in Venus’s atmosphere—leading to speculation about potential biological origins—phosphine is, notably, more commonly observed in larger gas giants and brown dwarfs, which are objects larger than Jupiter but lack the mass for sustained hydrogen…

Phosphine, a molecule previously detected (and debated) on Venus, has now been confirmed in the atmosphere of a brown dwarf, marking a significant advancement in astronomical understanding. This discovery, and its implications for non-biological processes, continues to captivate researchers studying celestial bodies beyond our solar system. Understanding Brown Dwarfs and Phosphine Detection Brown…

Unraveling the Mystery of the Aurora Borealis. What is the surprising discovery on the dark, isolated brown dwarf W1935?

An aurora that was thought to belong only to planets orbiting a star, discovered in an isolated brown dwarf known as W1935.

This groundbreaking observation marks the first time that an aurora has been detected in a starless object. This marks the first time an aurora has been detected in a non-stellar object.

The state-of-the-art James Webb Space Telescope, these celestial objects and explore the intriguing mysteries surrounding their genesis.

From charged particle collisions to mysterious infrared radiation phenomena, secrets of the aurora borealis and newly discovered objects deep within the universe, The exhibition reveals the existence of the aurora borealis.

Uncover the mysteries of extraterrestrial auroras, Don't miss this extraordinary journey into the unknown!

0:00 What is a brown dwarf? 1:05 What is the unexpected discovery of W1935 1:48 The Mechanism of Aurora Occurrence 3:15 Methane Emission in the Atmosphere 3:40 Testing Hypotheses for Causes 4:10 The WISE Satellite and W2220 5:00 Mysterious Methane Emission Phenomena 6:10 Mysteries of Jupiter and Saturn's Auroras 7:00 New Interpretation of Auroral Sources

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This is a 0.050 solar mass brown dwarf with an effective temperature of 600K and log g = 4.75 from MESA. The circles show the pre-computed boundary conditions in the deep atmosphere (tau=100) which I believe are from the COND (Allard et al.) models for 600K and log g = 5.0 and 4.5. The interior model runs between them as you’d expect for an interpolation.  I’ve also plotted two atmosphere models from the Sonora 2018 family; these are also 600K.Here it’s the log g = 5.0 model that seems to line up perfectly with the interior model. So there’s a slight offset, but with different physics and newer opacities I don’t think that’s surprising. A wise astronomer would read the papers to understand this better; I’ve posted this and will read later. 

#TBT to 20 years ago when the first confirmed brown dwarf was announced! These cool objects are the focus of my astronomy research group so it’s especially exciting when I find a way to wear them, like my new walnut Jupiter ring from @pretty-little-earth! The background n the photos above is a Hubble Space Telescope of Gliese 229A (a low-mass star) and Gliese 229B (a T-type brown dwarf) at @amnhnyc (one of my favorite backdrops).

You might be saying, but brown dwarfs form like stars do, and Jupiter is a planet! You’re right, but one of the reasons studying brown dwarfs is so important is that without stable hydrogen fusion like a star, they cool and fade over time so their atmospheres resemble those of gas giant exoplanets and even Jupiter. Hence, an altered image of Jupiter (like my purple Jupiter dress from @shenovafashion​) is often a stand in for the as-yet-impossible up-close image of a brown dwarf’s atmosphere.

The ring is so wonderful that I’ve worn the ring every day since I got it. I was worried the adjustable finding would be flimsy, but it’s very study and nicely shiny, and the laser cut walnut planet is simply beautiful. We have more goodies from @pretty-little-earth that we’ll share with you soon!

Image sources: 1, 2, 3