Josh Lothringer

Take a look at the paper, now accepted to AJ, for more info: arxiv.org/abs/2510.26785. The code and calculations used in the paper are available at the GitHub linked above. The data used in the paper is available here: jlothringer.github.io/LExACoM_MRT_Ac…

We hope this is just the start at looking at these population-level trends, now with more robust and reliable measurements. We'll continue to collect measurements as they become available and update the table. We plan to extend this to include free retrieval results.

We've collected 65 individual exoplanet atmosphere composition measurements to look for population-level trends 🔭#exoplanets To do this, we had to create a toolkit to standardize between definitions of . We call it ExoComp. (Yes, that's a Star Trek reference 😀).

Abstracts are due by tomorrow for the 12th installment of the Chesapeake Bay Area Exoplanet Meeting! Link below. The meeting will be December 5th, 2025 at JHU Applied Physics Lab. Hope to see you there.

Registration is open now!

Read the latest about JWST's Rocky Worlds Director's Discretionary Time program, including final targets and an upcoming information session: ow.ly/KfoB50WReQu

And a big shout-out to lead-author Yayaati for seeing this project through from proposal to paper and showing that HST still has lots to say about exoplanet atmospheres in the JWST-era! Check out the paper here: arxiv.org/abs/2508.10092. Accepted for publication in AJ!

We find tentative evidence for a limb asymmetry in the huge NUV feature. 3D GCM models (with mag fields!) to show that the data is (tentatively) more consistent with a model *with* a magnetic field than without! More obs of, e.g., the hot spot offset, could help.

I'm very excited to be able to share Yayaati Chachan's Hubble/WFC3 transit spectrum of ultra-hot Jupiter KELT-20b. Using *all* of WFC3's grisms, we get a 0.2-1.7 micron spectrum showing absorption by metals at in the UV and only weak absorption by water in the IR.

Abstracts close this Friday for the Fall 2025 STScI Science Workshop on Atmospheric Escape and Replenishment. We'd love to see you in Baltimore in November! Check it out and let me know if you've any questions. stsci.edu/contents/event…

Personally, these funds were vital in enabling me to do research with how busy I was teaching during the academic year at UVU. These data took years to fully analyze, and without the funding it would still be languishing.

🔭 Because it is more relevant now more than ever, this research was supported by funding from both NASA and NSF which allowed me, four undergraduate students, and two co-authors to spend time analyzing these data.

Popping in to say: 🔭 New paper day on the arXiv! arxiv.org/abs/2503.15472 We observed ultra-hot Jupiter WASP-178b with HST and JWST to try to figure out where the planet comes from!