Sierra Grant
Carnegie Fellow at the Earth and Planets Laboratory. Protoplanetary + circumplanetary disks. Formerly at MPE, BU, and University of Michigan. She/her. #BiInSci 🏳️🌈✨🔭 Opinions are my own.
sierragrant.com
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- @gcugno.bsky.social and I had a wonderful discussion with @goastromo.bsky.social for @setiinstitute.bsky.social LIVE about our work on the circumplanetary disk around CT Cha b!
- WATCH LIVE: youtube.com/live/t1pz56F...
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- PRESS RELEASE DAY! Could not be prouder of this result and so happy that it's now out!!! 🤩✨ Thanks to the team at @stsci.edu for the wonderful write-up and image!
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- Today is a special paper day for me: for the first time we can do chemistry in a circumplanetary disk around a planetary-mass companion! Gabriele Cugno and I used JWST to tease out the signal of CT Cha b, finding a rich carbon chemistry (7 molecules + 1 isotopolog detected)! arxiv.org/abs/2509.15209
- Feel free to reach out if you have any questions about Carnegie! It's an amazing place to be a postdoc!
- Another MINDS JWST paper! We explore the stark transition from H2O-dominated spectra in Sun-like systems to the carbon-rich chemistry seen for low-mass objects. We don't know exactly what is driving this trend, but we explore the possibilities that may be acting in concert. arxiv.org/pdf/2508.04692
- New MINDS paper from Nicolas Kurtovic, focused on binary systems. Spectra, extended emission, variability, multi-observatory analysis -- there's something for everyone! arxiv.org/pdf/2508.02576
- Our cat, but now in spherical form 😍
- A spotted star, a (very!) misaligned planet, and awesome gifs, what more could you want?! 🤩
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- Great work by Kielan Hoch and team on this incredible two-planet system!! We will revisit this target with MIRI-MRS next year to hunt for molecules in the disk around planet b, in a program led by Gabriele Cugno and me, and with Kielan's expertise on the system 🥳🪐
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- 〰️〰️〰️〰️ New paper from @tamburo.bsky.social! 🤩
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- Reposted by Sierra GrantI received a heartbreaking email today: A paper in a special issue I’m editing is being retracted because one of its authors is afraid of losing their job and their legal status in the U.S. if they publish a scientific study on evolution. Yes, on evolution, nature's engine of diversity.
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- Obligatory picture at the institute sign and new headshot for my first day as a Carnegie Fellow at the Earth and Planets Laboratory
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- Our latest JWST (+ ALMA, VLTI-GRAVITY, IRTF-iSHELL) paper has been accepted in A&A! arxiv.org/abs/2406.10217 We investigated the short-separation DF Tau binary system. We find an unexpected disk around B with ALMA, with movement seen in ~2 months. The disks are < 3 au in radius.
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- A mind-blowing result from the MINDS team! The disk around this small star is teeming with carbon-rich gas, further confirming how different the disks around low-mass stars are compared to their more massive siblings! Led by the awesome PhD student Aditya Arabhavi! webbtelescope.org/contents/new...
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- I finally celebrated job news: I’m moving stateside (well, okay, federal-district-side)! In the fall I will start a three-year position as a Carnegie Fellow at Carnegie Science’s Earth and Planets Laboratory (EPL) in Washington, D.C. 🇺🇸
- Wonderful article in Scientific American about water's cosmic journey, including some thoughts of my own!! 💧✨🔭 www.scientificamerican.com/article/jwst...
