Ekaterina Ilin

PhD research topics - Anton Pannekoek Institute for Astronomy PhD research topics

Are you looking to do a PhD in astronomy? Are you interested in radio stars and exoplanets? Then you should apply to do a PhD at @api.uva.nl with me! You can find more about the exciting project below. Applications are due 3rd of November!

api.uva.nl/vacancies/ph...

Really nice work, congrats!

The image shows a vast star field with a faint yellow-orange star, Betelgeuse, at its center. Two white segments radiate from it, converging toward a black box at the upper left. In the box, Betelgeuse appears as a bright orange, almost circular disk, next to its companion, a smaller, less well-defined, dark blue star located slightly to the lower left of Betelgeuse. The companion, detected with the 'Alopeke instrument on the Gemini North telescope, is a hot, young star. This discovery explains Betelgeuse's brightness variability every six years.

A 🧵
For centuries, Betelgeuse, the iconic red supergiant in Orion, has fascinated astronomers with its changing brightness.

Why does its light vary over a ~6-year cycle?

Thanks to the Gemini North telescope, we now have an answer: Betelgeuse has a companion star!

🔭 🧪 #stellarastro #galactic

Reset the counter!

A bright, fiery, orange-yellow star with swooping magnetic field lines, releasing an intense flare of light into space. To the right of the star, there is a small red planet touching one of the star's magnetic field lines. The flare is blasting in the direction of the planet. A haze of gas around the planet seems to be being pushed out into space. The background is filled with stars, giving the impression of deep space.

🆕For the first time, astronomers using our Cheops mission have caught a planet triggering flares of radiation from the star it orbits 🪐💥

These tremendous explosions are blasting away the planet’s wispy atmosphere, causing it to shrink every year.

Find out more 👉 www.esa.int/Science_Expl...
🔭 🧪

Close-in planet induces flares on its host star Nature - Planet-induced flares on HIP 67522, a 17 million-year-old G dwarf star with two known close-in planets, were detected.

read the full article and check out the transparent review process here: rdcu.be/euu5D

And, oh boy, is HIP 67522 b inflated -> Thao et al. 2024 ui.adsabs.harvard.edu/abs/2024AJ.....

These results make HIP 67522 an archetype for star–planet magnetic interactions in newborn systems — its effects on planetary atmospheres.
More to come! 🛰️

Searching for planet-induced radio signal from the young close-in planet host star HIP 67522 HIP 67522 is a 17 Myr old 1.2$M_\odot$ dwarf, and the only such young star known to host two close-in gas giant planets. The inner planet likely orbits close enough to its host to power magnetic star-...

📡 In parallel, we searched for planet-induced radio emission with ATCA.
HIP 67522 gave us bursts & high radio activity — one of the longest radio campaigns on a G dwarf to date.
📄 accepted to A&A: arxiv.org/abs/2507.00796

Close-in planet induces flares on its host star - Nature Planet-induced flares on HIP 67522, a 17 million-year-old G dwarf star with two known close-in planets, were detected.

🌟 First up: planet-induced flares with TESS & CHEOPS
📄 Nature: doi.org/10.1038/s415...
📄 on arXiv: arxiv.org/abs/2507.00791

🪐 Planet self-roast!

Two NEW papers on HIP 67522, a young star with two close-in giants and clear signs of magnetic star–planet interaction. The inner planet triggers flares on its host star, exposing itself to a 6 times higher flaring rate than without interaction. #astronomy #exoplanets

I'm currectly a postdoc in astronomy, working on star-planet interactions at the Netherlands Institute for Radio Astronomy. I'd like to post about cool paper I read, and work I did.

yes

@bot.astronomy.blue
signup

Stellar flares may hamper search for life in promising star system Astronomers have been trying to detect atmospheres on planets orbiting TRAPPIST-1, but bursts of radiation from the star make this challenging

Very small flares on a very small star with a bag full of very small planets. Detecting atmospheres on these terrestrial companions keeps challenging astronomers. Great work by Julien de Wit et al.! #trappist-1 #habitability #exoplanets #hubble

www.newscientist.com/article/2485...

#EAS2025Cork just kicked off. Over 1500 astronomers and space scientists gathered for the largest astronomical conference ever held in Ireland. The conference is hosted by @ucc.ie at their amazing campus. 500 participants attend online.