@johannavos
Astrophysicist studying Exometeorology | Associate Professor & Royal Society University Research Fellow at Trinity College Dublin | Visiting Scientist at American Museum of Natural History | she/her | https://johannavos.github.io/
I had such a great time visiting Oxford yesterday and getting a preview of all the cool science coming out of the exoplanets groups. Thanks so much for hosting me @airbornegrain.bsky.social @jaynebirkby.bsky.social ! 🪐
Nancy Grace Roman Space Telescope Cycle 1 Call for Proposals is Open!
roman-docs.ipac.caltech.edu/roman-propos...
Proposal Deadline: March 17, 2026
www.nasa.gov/missions/rom...
"Roman is slated to launch by May 2027, but the team is on track for launch as early as fall 2026."
#NASA #astronomy #AAS
🔭 A bit late, but I've finally put together a zenodo archive for the JWST observations and retrievals of SIMP-0136, based on my paper from earlier this year. If you want to play around with this super interesting models, or dive into the results, it's all available at zenodo.org/records/1785...! 🧪
Happy to share my insights on the potential of Doppler imaging with the ELT at #ExoELT last week! Also my first time at #ESO Garching!
CDT in Aerosol Science is welcoming applications for fully-funded PhD studentships as part of our 8th cohort to start in autumn 2026: www.aerosol-cdt.ac.uk/2026-projects/
Aerosol science is crucial to so many things, check out the linked project catalogue for studentships!
#PhD #academicjobs
We are hiring a new Assistant Professor in Astrophysics at Trinity College Dublin!! ☘
Job ad here: aas.org/jobregister/...
Deadline: Jan 02 2026
Please share widely! 🪐🔭
We love to see it!!
Seeking PhD candidates that want to do a thesis on exoplanet atmosphere retrieval + machine learning inference. Please apply by 31 October to Dr. Max Dax's and my shared project here: is.mpg.de/news/new-max... . Abstract for the thesis project is attached to this thread below!
New unified model of equatorial winds on giant planets helps to explain some of the zonal wind observations 🔭 I and my colleagues have made for Neptune and Uranus over the past few decades - www.science.org/doi/10.1126/...
The phosphine molecule, PH3, has been proposed as a biosignature in rocky planets. In @science.org, Burgasser et al. report phosphine in a brown dwarf atmosphere. "We therefore caution against the use of phosphine as a biosignature". #stellarastro #exoplanet ☄️
www.science.org/doi/10.1126/...
New JWST Data Shows Rogue Planet With a Colorful Combo of Wavelengths, Strong Storms, and Beautiful Auroras www.discovermagazine.com/new-jwst-dat...
🔭 It's paper day! Today I'm sharing the latest in a series of papers looking at the weather on other worlds, in this case bringing you the weather report from a nearby T-dwarf, SIMP-0136. 🪐
🧵 to follow...
Congratulations!!!
We have job opportunities in the APEx department at MPIA - please spread the word!
Postdocs: aas.org/jobregister/...
Tenure-track staff: aas.org/jobregister/...
Max Planck Research Group Leaders: aas.org/jobregister/...
+ happy to host ERC, Humboldt, and other third-party funds.
So great to see another incredible JWST variability study by Akhmetshyn et al. on the planetary-mass object SIMP 0136.
These kinds of datasets reveal the most important details about the atmosphere and how they change over time.
We are officially in in the era of exoplanet weather! 🪐☁️
I rarely see Planetarium Astronomer jobs being advertised in the UK, we have a distinct lack of Planetariums. The Royal Observatory in Greenwich is currently hiring for one! app.vacancy-filler.co.uk/salescrm/Car...
@christinepulliam.bsky.social we won’t stop til we’ve covered the whole spectrum! 🤩
Super excited for this accepted HST+VLA program led by Cian O'Toole, who hopes to expand our knowledge of extrasolar aurorae into the UV 🔭
We are so excited for Dr McCarthy @alliemccarthy.bsky.social to join the group @tcddublin.bsky.social 🪐☁️
Attended my first ever conference last month at #EASCork! Super inspiring to hear about what’s going on in exoplanets and brown dwarfs!
@evertnasedkin.bsky.social also gave an excellent talk highlighting time-resolved retrievals on the planetary-mass object SIMP 0136. It turns out that telling that deciphering extrasolar weather is challenging, but we are getting closer with JWST and new retrieval techniques
Very proud of Cian O'Toole who gave his very first conference talk at #EAS2025 last week. 🔭
He is investigating the drivers of variability in three brown dwarfs using observations from HST, VLA and a new framework for modelling variable atmospheres. Paper is incoming so watch this space! 📄📄📄
It’s a beautiful day in Cork to kick off our symposium on giant exoplanets and brown dwarfs #EAS2025
Looking forward to speaking at Astronomy on Tap this Wednesday in Cork! 🍻💫
Tickets available at this link www.eventbrite.ie/e/astronomy-...
A sprawling, textured field of galaxies scattered across the deep black of space. It is filled with the delicate smudges and glowing cores of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. The image focuses on a collection of interacting galaxies connected by delicate streams of stars. At top center lies a large elliptical galaxy that is dense and smooth, like a polished stone glowing with golden light. Like delicate spider silk or stretched taffy, these stellar bridges link the large elliptical to the few larger galaxies beneath, evidence of past collisions. All throughout the image, thousands of galaxies gather in clusters or are spread throughout, like glittering gems strewn on a table. Some are sharp-edged and spiral, like coiled ribbons; others round and diffuse, like polished pebbles. Still others are just smudges of various colors against the black of space. The background is peppered with pinpoint stars in reds, yellows, and blues, crisp against the velvet black.
A cosmic tapestry of glowing tan and pink gas clouds with dark dust lanes. In the upper right, the Trifid Nebula resembles a small flower in space. Its soft, pinkish gas petals are surrounded by blue gas, and streaked with dark, finger-like veins of dust that divide it into three parts. It radiates a gentle, misty glow, diffuse and soft like the warmth of breath on a cold hand. To the lower left, the much larger Lagoon Nebula stretches wide like a churning sea of magenta gas, with bright blue, knotted clumps sprinkled throughout where new stars are born. Both nebulae are embedded in a soft tan backdrop of gas that is brighter on the left than on the right, etched with dark tendrils of dust and sprinkled with the pinpricks of millions of stars.
A sprawling, textured field of galaxies scattered across the deep black of space. It is filled with the delicate smudges and glowing cores of galaxies of many shapes, sizes and colors, as well as the bright multi-colored points of stars. To the lower left is a region filled with the hundreds of golden glittering gems of a distant galaxy cluster. In the foreground, below and right of center, two blue spiral galaxies look like eyes beneath the entangled mass of a triple galaxy merger in the upper right. A few bright blue points of foreground stars pierce the glittering tapestry. All throughout the image, thousands of galaxies gather in clusters or are spread throughout, like glittering gems strewn on a table. Some are sharp-edged and spiral, like coiled ribbons; others round and diffuse, like polished pebbles. Still others are just smudges of various colors against the black of space. The background is peppered with pinpoint stars in reds, yellows, and blues, crisp against the velvet black.
Introducing...your sneak peek at the cosmos captured by NSF–DOE Vera C. Rubin Observatory!
Can you guess these regions of sky?
This is just a small peek...join us at 11am US EDT for your full First Look at how Rubin will #CaptureTheCosmos! 🔭🧪
#RubinFirstLook
ls.st/rubin-first-look-livestream
Super cool work!
This image shows the exoplanet 14 Herculis c. The view is mostly black, with very faint red splotches in the central region of the image. At the center of the image, there is a black circle, and in the center of that, there is a star symbol representing a real star. This black circle blocks the light from the host star. To the lower right of the circle is a fuzzy bright orange circle, which is the exoplanet.
NEWS: #NASAWebb has directly imaged a cold exoplanet in an extremely misaligned orbit for the first time. The observations have surprised researchers in more than one way: webbtelescope.pub/3ZSctun #AAS246 🔭 🧪
Macquarie has put out the call for fully-funded PhD applications in all areas of astronomy, to start January 2026: aas.org/jobregister/...
Applications due 2 July to astrohdrinfo@mq.edu.au. International scholarships will be competitive, typically expecting publication and/or excellent GPA.
Different telescope mirror apertures and their resultant point spread functions.
Together with Sebastiaan Haffert our review on “High-Contrast Coronagraphy” is out - writing an ARA&A review has been on my academic bucket list, and I’m very proud of the result. It uses the showyourwork! framework, making it a completely reproducible paper. #FAIR #astrodon #exoplanets
Less than a month till the deadline to apply for this PhD place!
