Gijs D Mulders
Exoplanet Astronomy
Assistant Professor
Santiago de Chile
http://gijs.cl
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- Reposted by Gijs D MuldersIt's happening!!! Pandora is going to space in just over 16 hours (if all goes well). Pandora is going to help us study exoplanet atmospheres, even when their host stars are misbehaving. I am headed up to Vandenberg to watch the launch shortly, and will make a thread about the mission/launch here!
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- Reposted by Gijs D MuldersThe application for the ESO Summer Research Programme 2026 has just opened! It‘s a six week programme in Garching close to Munich where pre-Ph.D students can work on a hands-on project. Working at @eso.org is a fabulous experience, so please help me spread the word ✨ 🔗 eso.org/sci/meetings...
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[Not loaded yet] - Equating giant planet occurrence rate of ~20% to the disk fraction, that means a timescale of ~10 Myr for giant planet formation!
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- Question for the #exoplanets crowd: Does any one know where to find an updated version of this plot? I'm looking for the "standard" exoplanet mass vs. semi-major axis plot, but with an overlay of which planets have a spectroscopic measurement of their atmosphere wasp-planets.net/2020/09/29/w...
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- Reposted by Gijs D MuldersThe NASA #Exoplanet Archive now has Gaia DR3 IDs! This should hopefully make your work and planning observations easier! exoplanetarchive.ipac.caltech.edu
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- How do giant planets influence the type of #exoplanets that form in the habitable zone? A thread 1/🧵
- One of the big mysterious in planet formation is how earth got to its current state: Not too big or too small, and with the right amount of water to support life. 2/🧵
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- Reposted by Gijs D MuldersPaper day! You're doing ground-based high-resolution exoplanet transmission spectroscopy and want to analyse the planet—not the star or Earth's atmosphere. Is there a way to disentangle your spectrum *without* destroying the planet signal? arxiv.org/abs/2509.12737 🧵⬇️ 🔭 #exoplanets #astromethods
- Reposted by Gijs D MuldersFor the last two years, I've been paying for the Astronomy feeds hosting myself. It has been a privilege to grow our community here, but I also shouldn't keep doing it for free 😅 That's why I'm delighted to announce that we now have a donations page on Open Collective! 🔭☄️ #astrophotography
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- Reposted by Gijs D MuldersProud supervisor moment: #LeidenObservatory graduate student Richelle van Capelleveen led one of two papers on our discovery of WISPIT 2b, a 5 Jupiter mass exoplanet clearing a path in a circumstellar disk. Laird Close and his team saw it in H-alpha, indicating gas accretion #astrodon 🔭 🧪
- Reposted by Gijs D MuldersNew protoplanet(s?) alert! I'm happy to share this LBTI image of WISPIT 2 from our team's paper led by Laird Close. Planet b was discovered at Hα with MagAO-X following the SPHERE disk discovery (R. van Capelleveen +), and CC1 might be a candidate 2nd (enshrouded?) protoplanet #exoplanets ☄️🔭🧪
- #achievement for the day (please don't send me any more email)
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- Question for the radial velocity #exoplanets experts: Is there an animation that shows two spectra being shifted with respect to each other and the corresponding values of the cross correlation function changing? I think I’ve seen one in a talk but can’t find a nice animation online
- Reposted by Gijs D MuldersWe looked for an atmosphere on TRAPPIST-1d using JWST, but we didn't see any atmospheric absorption. So TRAPPIST-1d is quite different from Earth, despite lying just inside the habitable zone. The planet is either: ➡️ A bare rock. ➡️ Very cloudy. ➡️ Has a thin, Mars-like atmosphere. #Exoplanets 🔭
- The TRAPPIST-1 d exoplanet may be Earth-sized 🌍 but it has no Earth-like atmosphere. Webb’s #NIRSpec has found no traces of molecules that are common in Earth’s atmosphere. Read more 👉 www.esa.int/Science_Expl... 🔭 🧪
- Reposted by Gijs D MuldersKepler mission: smaller stars have more short-period, small #exoplanets. Theory: the smallest stars won’t have enough disk material to make small planets so there must be a turnover. Kepler+K2: We have found a turnover! Check out our newest Scaling K2 paper: arxiv.org/abs/2508.05734 🧵 1/9 🔭🧪☄️
- Reposted by Gijs D MuldersI have a complaint about Avi Loeb's latest work and I want to speak to management. medium.com/@steve.desch...
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- Reposted by Gijs D MuldersWhat does the radius valley tell about the planet formation scenario around low mass stars? And how does it connect it with water worlds? To know more, come visit my poster #37 at SSW2025. #sagan2025 #exoplanets
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- Interested in doing a Masters or PhD in one of the leading astronomical institutes in Latin America? Apply now to these fully funded positions! aas.org/jobregister/... 🔭🧪☄️ #exoplanets
- Why does the solar system not have super-Earths? A thread #exoplanets ☄️
- One of the key exoplanet discoveries is that most stars like the sun have close-in super-Earths
