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Tad Komacek

@tadkomacek.bsky.social

Associate Professor of Physics of Exoplanet Atmospheres in the Atmospheric, Oceanic, and Planetary Physics sub-Department of the Department of Physics and Tutorial Fellow of Somerville College at the University of Oxford, UK.

58 Posts286 Follower234 Folgt
ExoClimesVIII@exoclimesviii.bsky.social · last wk.

🔈Save the date! ExoClimes VIII will take place at the Institute of Science Tokyo, from 11–16 July 2027. The conference will bring together the international community studying planetary climates, atmospheres, and habitability🌏 Stay tuned for more updates!  exoclimes.org

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Harrison Nicholls@nichollsh.bsky.social · last wk.

New paper on arXiv today! On the efficacy of using novel Bayesian machine learning to dispatch 'expensive' forward models of planetary evolution. This connects with #PLATO ageing and can help solve degeneracies in current static-retrieval approaches which treat #exoplanets as snapshots.

Constraining the lives and times of exoplanets through evolutionary Bayesian retrievals

Static retrieval frameworks are leading tools for interpreting exoplanet observations, yet time-independent modelling leaves them prone to degeneracy and unable to resolve exoplanets' histories. The c...

arxiv.org

Astronomer Royal for Scotland | Catherine Heymans@astroroyalscot.bsky.social · last wk.

I'm absolutely devastated for colleagues at Jodrell Bank who found out this morning that funding for the UK's e-MERLIN radio telescope array will be terminated. This is a short-sighted move, to save a tiny fraction of the overall UK science budget. #SaveJodrellBank 🔭🧪 www.bbc.co.uk/news/article...

Jodrell Bank's Lovell telescope faces axe in science cuts, BBC understands

Astronomers warn it would tear the heart out of UK science, and leave a generation untrained.

bbc.co.uk

Astronomer Royal for Scotland | Catherine Heymans@astroroyalscot.bsky.social · 3w ago

“What will the Lovell Telescope discover/enable 20 yrs from now? I can’t tell you, and that’s the point. It will either be something extraordinary that none of us can yet predict, or we will defund it and leave Cheshire with a rusting monument to unfulfilled potential and discoveries never made.” 🔭🧪

Planets @ Oxford@oxoplanets.bsky.social · last mo.

Congratulations to Dr Ben Sutlieff (@bensutlieff.bsky.social), Luke Parker (@luke-parker.bsky.social), Prof. Jayne Birkby (@jaynebirkby.bsky.social), and Leyla Iskandarli on the discovery of beta Pic d! You can read more about their discovery here: arxiv.org/abs/2606.23801

Direct Imaging Discovery of Giant Exoplanet $β$ Pictoris d: A Decade-Long Game of Hide-and-Seek

We report the direct imaging discovery of a third exoplanet in the $β$ Pictoris system. We detect $β$ Pictoris d in non-coronagraphic observations obtained with VLT/ERIS as well as multi-epoch archiva...

arxiv.org

Jonathan Fortney@jjfplanet.bsky.social · 2mo ago

Hello! We have a very-off-cycle postdoc fellowship at UC Santa Cruz. Open to any area of Astronomy and Astrophysics. Applications are due July 15th. It is funded by the Moore Foundation. Looking for someone to start Oct 1, 2026 (!, approx), see details below. aas.org/jobregister/...

Postdoctoral Fellow in Astronomy & Astrophysics, UC Santa Cruz | American Astronomical Society

The Department of Astronomy and Astrophysics invites applications for a two-year Postdoctoral Fellowship position at the University of California, Santa Cruz, funded by the Moore Foundation. The searc...

aas.org

Tad Komacek@tadkomacek.bsky.social · 3mo ago

Please join @astroyami.bsky.social, Keren Duer-Milner, and I for a session on Giant Planets Across the Solar System and Beyond! meetingorganizer.copernicus.org/EPSC2026/ses...

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meetingorganizer.copernicus.org

Europlanet@europlanetmedia.bsky.social · 3mo ago

☄️Planetary scientists are invited to submit an abstract for the #EPSC2026, which will take place in The Hague, 6–11 Sept 2026. 🗓️ Abstract deadline is 13 May 👉 www.europlanet.org/epsc2026-call-for-abstracts-now-open/

Duncan Christie@astroduncan.bsky.social · 4mo ago

🎉 The latest paper by the great Jiachen Liu (@jiachenliu.bsky.social) on chemical transport in the atmosphere of K2-18b is now up on the arXiv. 🎉 arxiv.org/abs/2604.07987

Three-dimensional transport-induced chemistry on temperate sub-Neptune K2-18b, Part II: the combined effects of atmospheric dynamics and chemical reactions

The upper atmospheres of temperate sub-Neptunes are strongly influenced by atmospheric dynamics due to their cool equilibrium temperature and thereby longer chemical timescales than the atmospheric dynamical timescales. In this study, we used a three-dimensional (3D) general circulation model to investigate the transport-induced disequilibrium chemistry and vertical mixing on temperate gas-rich mini-Neptunes, using K2-18b as an example. We model K2-18b assuming 180 times solar metallicity and consider it as either a synchronous or an asynchronous rotator, exploring spin-orbit resonances of 2:1, 6:1, and 10:1. We find that the vertical transport affects the chemical structure significantly, making CO$_2$ and CO more abundant ($\sim$10$^{-3}$) in the upper atmosphere compared to the chemical equilibrium abundance (<10$^{-15}$), and horizontal winds further homogenize the chemical composition zonally in this region. Molecular abundances in the photosphere generally agree across different rotation periods. We employ a passive tracer in the model to estimate the one-dimensional (1D) equivalent eddy-diffusion coefficient ($K_{zz}$) of K2-18b, providing a parameter useful for future 1D atmospheric models. Additionally, synthetic transmission spectra generated from our model are compared with the JWST observations, and we find that our model can provide a comparable fit to the observations. This work offers a 3D perspective on transport-induced chemistry on a temperate sub-Neptune and derives vertical mixing parameters to support 1D modelling.

arxiv.org

Tad Komacek@tadkomacek.bsky.social · 4mo ago

I’m helping @astroyami.bsky.social and Keren Duer-Milner convene a session on gas giants from the Solar System to exoplanets, any and all abstracts welcome!

Europlanet@europlanetmedia.bsky.social · 4mo ago

📣 ANNOUNCEMENT The Call for Europlanet Science Congress 2026 Abstracts is NOW Open! ☄️Planetary scientists are invited to submit an abstract for the #EPSC2026, which will take place in The Hague, 6–11 Sept 2026. 🗓️ Abstract deadline is 13 May 👉 bit.ly/EPSC2026abstracts

Planets @ Oxford@oxoplanets.bsky.social · 5mo ago

Congratulations to Dr Tobias Meier (@tgmeier.bsky.social) on the publication of his paper "Mantle Convection and Nightside Volcanism on Lava World K2-141 b" featuring 12 former and current Oxoplanet members! You can read the paper here: arxiv.org/abs/2603.02408

Mantle Convection and Nightside Volcanism on Lava World K2-141 b

Ultra-short period lava worlds offer a unique window into the coupled evolution of planetary interior and atmospheres under extreme irradiation. In this study, we investigate the mantle dynamics, nigh...

arxiv.org

Dr. Raphael Marschall@spacemarschall.net · 6mo ago

Hi y'all You still have a few days to apply for our open professor position in planetary science in Bern, Switzerland. See more details below! For any questions, feel free to reach out to me. 🔭🧪⚛️#planetSci

Dr. Raphael Marschall@spacemarschall.net · 9mo ago

Hi #planetaryScience folks, we have an open position for a *Professor in Planetary Sciences* at the Space Research & Planetary Sciences Division of the @unibe.ch. Application deadline: *Jan 31, 2026* Full ad: ohws.prospective.ch/public/v1/jo... Reach out to me if you have any questions! 🧵 1/5