Tessera
Folgen

Bibiana Prinoth

@bibianaprinoth.ch

🇨🇭 • ESO fellow @eso.org exploring exoplanet atmospheres 🪐 🔭 🇩🇪 • PhD from Lund Observatory 🇸🇪 & ESO 🇨🇱 • passionate about all things outreach and science communication ✨

328 Posts3153 Follower811 Folgt
Bibiana Prinoth@bibianaprinoth.ch · last wk.

Gonna do something a bit scary on Monday 🙃 I‘ll be talking about magnetic fields on #exoplanets in German 🥺

Haus der Astronomie@hausderastronomie.bsky.social · 2w ago

Das Magnetfeld der Erde ist wie ein Schutzschild, das des Jupiter hingegen erzeugt messbare Radiostrahlung. Und wie schaut es mit Magnetfeldern bei extrasolaren Planeten aus? @bibianaprinoth.ch verrät es uns am Montag bei Astro & Co - wie immer um 19 Uhr live 🔭 www.youtube.com/watch?v=9eQE...

ESO@eso.org · 2w ago

That's no moon. It's a...hang on, what should we call it? 🤔 Our VLT has revealed evidence for a moon-like object in the CD-35 2722 system. Yet this new ‘exomoon’ detection is challenging cosmic labels! 🔭 🧪 #exoplanets 1/4

The artist's impression features a small star (left) and two gaseous bodies (centre and right), set against the blackness of space. Credit: ESO/M. Kornmesser.
ESO@eso.org · 3w ago

Ten years of hide-and-seek! 🫣 Astronomers used our VLT to find a new #exoplanet orbiting the famous star Beta Pictoris — hiding in archival ESO observations spanning over a decade! And it's shyer than any exoplanet we've imaged before. 🔭 🧪 1/3 📷 ESO/B. Sutlieff, M. Bonse et al.

Image of a star system. The central star is hidden behind a coronagraph, marked by a white star symbol at the centre. A bright companion appears to the left, while a much fainter companion, indicated by a white arrow, is visible to the right against a reddish-orange background.
Sarah Kendrew@sarahkendrew.bsky.social · 3w ago

A major take-home from #SPIEAstro is that the level of scientific ambition in the European ground-based astronomy community is sky-high following the successes of VLT/VLTI, ALMA and the progress on ELT. @eso.org is *the* global leader in this area. This event sounds fab.

Bibiana Prinoth@bibianaprinoth.ch · 3w ago

Hi #exoplanets folks, I’m attending the Expanding Horizons conference @eso.org this week (thinking about the facility post-ELT… terrifying, I know 😅). One thing that came up is that relatively few early-career astronomers submitted (co-authored) white papers for the process. next.eso.org 1/3

Linn Boldt-Christmas@nplinnspace.bsky.social · last mo.

A very merry yee-haw to all horse girls & cowboys (gender neutral: horse cows?) attending #HoRS3S in Granada this week! I've sadly ended up unable to attend IRL this year, but am sending my best in the form of a poster that'll be up in my absence on #exoplanet WASP-107 b 🔭🤠💖🐎🧪 Have a fun week y'all!

Don’t throw away your rubbish ground-based transit data (yet)! -- A cautionary tale starring warm super-puff WASP-107 b and VLT The problem: Ground-based transmission spectroscopy observations have seen remarkable success in characterising hot Jupiter exoplanets in the last decade with increasingly high detail, and our hope is to eventually characterise smaller, cooler exoplanets similarly – one day, even Earth-like targets. To get there, we have to explore what shortcomings exist in our current observational capabilities and methodology by exploring an ”in-between” target: the neither-temperate-nor-hot Neptune-sized WASP 107-b (Teq ≈ 740K). Method: WASP-107 b is already well-studied from space, and thus a good playground for assessing the quality of our ground-based approaches. It is observationally favourable in some ways (e.g. good scale height) but more challenging in others (e.g. cloudy, cooler Teq), making it a good case study for our tried-and-tested techniques like cross-correlation. A number of molecular species had already been detected by JWST, but could we do it from the ground? By using a combination of real and simulated data, we could explore what aspects of traditional methods perform well for these challenging targets, and which need a rethink. We found that for cooler and cloudier targets like WASP-107 b, the amount of signal that one can reasonably expect is unfortunately very low. Several factors can compound and effectively create scenarios where there is simply not enough signal to reach detections of S/N ≥ 5, even if everything is done ”correctly”. What looks like bad data might not be bad, just… as good as we can get, for now!
Andrew Mann@amann.bsky.social · last mo.

Last is the SOYSAUCE survey, PI Madyson Barber. Work on studying the alignment between planets and their host stars, focusing on <200 Myr systems (fast misalignment or primordial misalignments). So far, things look aligned. This was done as a twilight zone reference 🧪🔭⭐ #exoplanets

Bild
Bibiana Prinoth@bibianaprinoth.ch · last mo.

I am giving a keynote at the HoRS3S conference next week (my first keynote so consider me very excited 🥹) & seriously it‘s so much fun prepping those slides 🤭 Shoot me a message if you‘re coming to HoRS3S next week. I might find a way to give you a shoutout 😋 #exoplanets

Duncan Christie@astroduncan.bsky.social · last mo.

MPIA PhD student Angelique Kahle has a very cool paper out today looking at everyone's favourite ultra-hot Jupiter, WASP-121b. Angelique is giving a talk on the results next Monday at Exoplanets VI, as well. #exoplanets arxiv.org/abs/2606.21855

The panchromatic JWST dayside spectrum of WASP-121 b reveals a refractory-rich formation

One path to understand how planets form is to link their present-day atmospheric composition to predictions from planet formation models. For the hottest planets, the abundances of refractory species ...

arxiv.org

Bibiana Prinoth@bibianaprinoth.ch · last mo.

Last week, I uploaded my first first-author paper as Dr. Prinoth to arXiv, and I finally have time to tell you about it. This one has been a long time coming, and I'm incredibly happy and proud that it's finally out in the #exoplanets world! 🔗 arxiv.org/abs/2606.14490 1/n

A population view of transiting hot giant exoplanets: Tracing Fe and Ti chemistry with ESPRESSO and MAROON-X

Hot and ultra-hot Jupiters offer a unique laboratory to study atmospheric chemistry at the population level using ground-based high-resolution spectroscopy. Fe and Ti are key tracers of thermal and ch...

arxiv.org

Bibiana Prinoth@bibianaprinoth.ch · last mo.

Very happy to share that I got awarded the IAU PhD Prize of Division F for my thesis on “Transmission spectroscopy of hot gas giant #exoplanets ” 🪐 I’m incredibly proud and happy, but also immensely grateful for all the support from supervisors, collaborators, friends and family through all this! ❤️

ESO@eso.org · last mo.

Our congratulations to ESO fellows Maximilian Häberle & Bibiana Prinoth @bibianaprinoth.ch on receiving the 2025 IAU PhD Prize 👏 Assigned by each IAU Division, it acknowledges remarkable work carried out in the Division's subject area during the previous year. 1/4 🧵👇  🔭

Promotional graphic announcing the recipients of the 2025 IAU PhD Prize. The text reads, “Congratulations to Maximilian Häberle & Bibiana Prinoth on receiving the 2025 IAU PhD Prize.” The announcement is displayed over the image of a nebula with swirling clouds of gas and stars. Circular portrait photos of the two awardees appear at the bottom.
Bibiana Prinoth@bibianaprinoth.ch · 2mo ago

Magnetic fields tend to be the running joke at #exoplanets conferences. You can be sure someone asks „what about magnetic fields?“. This is the answer ⬇️

ESO@eso.org · 2mo ago

Using our VLT and the Gemini North telescope, astronomers have measured the strength of #exoplanets ’ magnetic fields for the first time. These fields turned out to be comparable to those found in our Solar System. More: https://www.eso.org/public/news/eso2606/ 🔭 🧪 #exoplanets

An illustration of a planet orbiting a star. The star is a huge yellow sphere with a hot “bubbling” surface. The planet is a gas giant, completely covered with clouds that are smeared due to the planet’s fast winds. The planet is surrounded by a magnetic shield of sorts, depicted with blue lines curving away from the star
Bibiana Prinoth@bibianaprinoth.ch · 2mo ago

Hi #exoplanets people! Just popping by to remind you of the upcoming abstract deadline (31 May) for "Bridging Horizons: Harnessing ESO's current facilities for the dawn of exoplanet populations studies" happening in November! 🪐🔭 www.eso.org/sci/meetings...

ESO - Bridging Horizons

ESO is the European Organisation for Astronomical Research in the Southern Hemisphere. It operates the La Silla Paranal Observatory in Chile and has its headquarters in Garching, near Munich, Germany.

eso.org

Linn Boldt-Christmas@nplinnspace.bsky.social · 3mo ago

🪐🔭 Our paper on everyone's favourite popcorn #exoplanet, WASP-107 b, has now been accepted for publication in A&A! Here is the updated arXiv version: arxiv.org/abs/2508.18964 The main science results are covered in the original thread below ⬇️ but since we added a bunch of cool new things... 🧪🧵

Linn Boldt-Christmas@nplinnspace.bsky.social · 11mo ago

Do you love WASP-107 b? Do you love making use of *both* ground VLT + space JWST obs to detect molecules in a "warm" (Teq<800K) #exoplanet in transmission, even in a crazy confusing cloudy atmosphere?! 🚨 It's PAPER* DAY! Which means #scicomm thread! 🧵⬇️🔭🪐🧪 *pre-print! arxiv.org/abs/2508.18964

Andrew Mann@amann.bsky.social · 5mo ago

I'm super excited to share a HUGE paper out from Young Worlds Lab team member Andy Boyle. I present for you, ~900,000 rotation periods from TESS! 🤯🔭🧪⭐ #exoplanets #stellarrotation arxiv.org/abs/2603.05586

The TESS All-Sky Rotation Survey: Periods for 944,056 Stars Within 500 pc

Stellar rotation is a fundamental tracer of stellar magnetic evolution, age, and activity, with broad implications for Galactic archaeology and exoplanet characterization. The Transiting Exoplanet Sur...

arxiv.org

Bibiana Prinoth@bibianaprinoth.ch · 5mo ago

The ESO studentship was probably one of the best experiences of my academic career so far; recommend it 100%! Please spread into your networks. Happy to answer questions or even host a student with one of my fellow #exoplanets people. Just get in touch!💙

ESO@eso.org · 5mo ago

#ESOjobs If you are a PhD student in astronomy or related scientific fields, you can apply for the ESO Studentship Programme 2026/2027. Positions are available at our Headquarters in Germany or in our offices in Santiago (Chile). Apply by: 20 April 2026. Details: https://recruitment.eso.org/ 🔭

Bibiana Prinoth@bibianaprinoth.ch · 8mo ago

The 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...

ESO - SummerResearch2026

ESO is the European Organisation for Astronomical Research in the Southern Hemisphere. It operates the La Silla Paranal Observatory in Chile and has its headquarters in Garching, near Munich, Germany.

eso.org

Bibiana Prinoth@bibianaprinoth.ch · last yr.

In case you’re interested in the paper(s) about WASP-121 b using the 4UT mode of ESPRESSO — or as I like to call it: ESPRESSO’s superpower — check out: ui.adsabs.harvard.edu/abs/2025A%26... ui.adsabs.harvard.edu/abs/2025Natu...

Titanium chemistry of WASP-121 b with ESPRESSO in 4-UT mode

Transit spectroscopy usually relies on the integration of one or several transits to achieve the signal-to-noise ratio (S/N) necessary to resolve spectral features. Consequently, high-S/N observations...

ui.adsabs.harvard.edu

ClimateBook@climatebook.bsky.social · last yr.

At #ExoclimesVII Bibiana Prinoth is talking about TiO and VO on ultra hot Jupiters; these are necessary to explain observed spectra (via effect on temperature profile) but detecting Ti or V using HR spectroscopy has been elusive. Now, using the Espresso spectrometer with all 4 VLT telescopes...