BLUE
BH
Brandon Hensley
@bhensley.bsky.social
Astrophysicist trying to understand our dusty universe
78 followers74 following11 posts
BHbhensley.bsky.social

Loved the title *and* the paper!

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BHbhensley.bsky.social

If you wait until the last minute, it only takes a minute, right?

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BHbhensley.bsky.social

Hard-hitting in-flight science trivia.

“What is water stored beneath the surface of the Earth called?” Choices: A) Groundwater B) Galaxy Clusters C) Sandstone D) Dawn
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BHbhensley.bsky.social

Ready for a week of dust in Sweden!

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BHbhensley.bsky.social

Aside from telling us more about PAH chemistry, the strength of this feature and its variations in the ISM may shed light on why the D/H ratio is so surprisingly variable in the Galaxy. 2/2 ui.adsabs.harvard.edu/abs/2006ApJ....

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BHbhensley.bsky.social

PAH features associated with attached H atoms have longer wavelength counterparts when deuterium is subbed for H. JWST just found one at 4.65um in what looks like a serendipitous detection in a molecular outflow spectrum. 1/2 arxiv.org/abs/2309.06486

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BHbhensley.bsky.social

Magnetic fields in a z=2.6 galaxy with ALMA polarimetry! arxiv.org/abs/2309.02034

Polarized emission from a z=2.6 galaxy in yellow/orange with white polarization vectors overlaid. The galaxy is lensed and multiple structures are visible in the image: two roughly circular regions and one elbow-shaped.
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BHbhensley.bsky.social

"Ylem" is way too cool of a word for us not to be using it in modern cosmology.

Wikipedia definition of "ylem": Ylem is a hypothetical original substance or condensed state of matter, which became subatomic particles and elements as we understand them today. The term was used by George Gamow, his student Ralph Alpher, and their associates in the late 1940s, having resuscitated it from Middle English after Alpher found it in Webster's Second dictionary, where it was defined as "the first substance from which the elements were supposed to have been formed."
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BHbhensley.bsky.social

One of the many notable things about this spectrum is that it includes the shortest (3.3 micron) and longest (17 micron) known PAH features. Made possible by the broad wavelength coverage of JWST.

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BHbhensley.bsky.social

An embarrassment of riches indeed! Gorgeous spectrum of the Orion Bar with prominent emission from hydrocarbon molecules as seen by JWST. Kudos to the PDRs4All team! 🔭 arxiv.org/abs/2308.16733

Emission versus wavelength from 3 to 20 microns of the Orion Bar as seen by JWST. Emission features from polycyclic aromatic hydrocarbons are highlighted in red.
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BH
Brandon Hensley
@bhensley.bsky.social
Astrophysicist trying to understand our dusty universe
78 followers74 following11 posts