[Astronomy seminar] SU astronomy departmental seminar Friday March 10th - Ryan Boukrouche (SU)

[Astronomy seminar announcements]

Dear all,
The next SU astronomy departmental seminar will take place on Friday, March 10th at 10:30am in room FC61 (AlbaNova building, 6th floor) and on zoom (https://stockholmuniversity.zoom.us/s/61002076352).

———————————
Speaker: Ryan Boukrouche (SU)
Title: Transition to the post-runaway climate state on rocky worlds with large surface water inventories.
<https://www.albanova.se/event/astronomy-departmental-seminar-kelley-hess-csic/><https://www.albanova.se/event/astronomy-department-seminar-martin-rey-oxford/>https://www.albanova.se/event/astronomy-departmental-seminar-ryan-boukrouche-su/


Abstract:


The lifetime of habitability on rocky planets orbiting stars that brighten over time, like the Sun, is finite. Once the planet finds itself closer to its star than the inner edge of its habitable zone, any ocean of liquid water on its surface evaporates, and the atmosphere goes into a temporary water-rich phase if enough water was initially present. After millions of years, the planet eventually loses its water. This is the runaway greenhouse effect, the ultimate climate catastrophe that turns potentially temperate planets into hot wastelands with a steam atmosphere overlying a possibly molten magma surface. The advent of the James Webb Space Telescope and the promise of future observatories makes studying these prime examples of failed Earths all the more timely.

I will introduce the field of exoplanet climate modelling in the context of a study that focused on modelling the different ways that such a planet can stop heating up and start cooling down to transition to a post-runaway climate state. I explore the properties that its atmosphere would feature, including the location of potential clouds that could improve or hamper habitability prospects. I also estimate what the JWST could see when observing such planets, assuming that their climate is undergoing the processes that we are modelling.

———————————

We look forward to seeing many of you there. Thanks!

Eliot and Kris


Upcoming Events:

2023-03-17  Mansi Kasliwal (Caltech) - Zoom only (talk at 3pm)
2023-03-24  Priscila Pessi (SU)
2023-03-31 Mattia Sirressi (SU)
2023-04-7 No Seminar - Långfredagen

The calendar for later planned seminars is available here<https://ebox.su.se/owa/calendar/75d76b284ca84db1a85c4e021d1133e8@astro.su.se/22bc11d486d04afaa009a9730dd065d65524176602456481514/calendar.html>.
(Please note that calendar can be subject to updates)

———————————
Join Zoom Meeting:
https://stockholmuniversity.zoom.us/s/61002076352
Meeting ID: 610 0207 6352

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.su.se/pipermail/seminars-announce.astro-at-su.se/attachments/20230306/cfd1b4ba/attachment.html>