If the grains grow to large sizes, smaller particles get depleted and the cooling becomes inefficient. This is why we find that the VSI is suppressed in the outer disk regions for high fragmentation velocities.
13.12.2023 13:50 — 👍 0 🔁 0 💬 0 📌 0
Fast thermal relaxation is essential for the VSI, and requires the presence of small grains. In collisions with the gas molecules they relax perturbations in temperature and make vertical gas motion possible.
13.12.2023 13:48 — 👍 0 🔁 0 💬 1 📌 0
What is the impact of dust grain growth on the vertical shear instability (VSI)?
@birnstiel.bsky.social, Hubert Klahr, and I found that the VSI is highly sensitive to the grain fragmentation velocity, which sets the max. particle size and thus the cooling times
iopscience.iop.org/article/10.3...
13.12.2023 13:45 — 👍 8 🔁 3 💬 1 📌 1
Exoplanets, atmospheres, aliens. Director of the APEx Department at MPIA.
Associate Professor / Royal Society University Research Fellow in Astronomy at University of Exeter.
Doing research on Planet Formation, Exoplanets & Exocomets 🌎☄️
Astronomy Professor at Harvard. Founder of glue solutions, inc. & http://path-to.org. Views are my own.
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Astronomer, physicist, statistician, data analyst, open scientist. (Totally not at all the other David Hogg). I live on Lenape land.
Assistant Professor of Planetary Physics at Kapteyn Astronomical Institute, University of Groningen 🇪🇺 he/him | formingworlds.space | born at 351 ppm
Postdoc at the Institute for particles physics and astrophysics, ETH Zürich, Switzerland | studying the evolution of sub-Neptunes | formerly at Globe Institute, University of Copenhagen, Denmark | 🌈
Astrophysics postdoc, currently at TU Delft🇳🇱. Planet Formation, Accretion Discs (especially misaligned and warped ones), Dust Evolution, Computational Astrophysics. Formerly Leicester🇬🇧, Milan🇮🇹, Lyon🇫🇷, and Heidelberg🇩🇪. Originally from 🇪🇬
Retired computational astrophysicist
Interpretability at Anthropic; prev Google DeepMind, Simons Foundation, Journal of Open Source Software
(he/him)
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I’ve boldly gone into the clear blue yonder. Follow for more recipes and tips.
Exoplanet Astronomy
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Santiago de Chile
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Astrophysicist ✨ Research Group Leader at MPS Göttingen 🇩🇪 Planet formation theory 🪐 she/her
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Assistant professor of astronomy at Leiden Observatory | Leiden University | Formerly 🇨🇦&🇺🇲 | Planet formation | ALMA | Astromom | Outreach | She/her/hers | Views my own
Chilean astrophysicist and Dr/Prof at USACH. Planet formation and young exoplanets. Artsci interplay.
UC Santa Cruz Astronomy Professor & Department Chair, Other Worlds Laboratory (OWL) Director. Planetary Astrophysics: Exoplanets & Solar System. Father, Husband, Minnesotan, Runner. Proud product & employee of the public school system, age 5 to today.
Cantankerous astrophysicist and editor. Grandfather and dog owner. I could probably drink less coffee. I think about magnetized turbulence and what it means for the universe.
Orcid 0000-0002-2307-3857
Astronomer working at NAOJ, Japan. I'm posting in Japanese by believing the automatic translation to English works well now.
Digestible summaries of the latest astronomy research. Written by an international team of grad students for undergrads! Supported by the @AAS_Office. #scicomm
PostDoc | astrophysics | simulations | galaxy clusters | cosmic rays
