Sylvain Breton
@sy-brt.bsky.social
French astronomer in Sicily 🌋☀️
Osservatorio Astrofisico di Catania | Asteroseismology of solar-type stars ⭐🔭 | I like all types of waves 🌊🔊
Little too much of a railway enthusiast for someone living on an island 🚂
Occasionally under water 🤿🐟
(He/him)
Osservatorio Astrofisico di Catania | Asteroseismology of solar-type stars ⭐🔭 | I like all types of waves 🌊🔊
Little too much of a railway enthusiast for someone living on an island 🚂
Occasionally under water 🤿🐟
(He/him)
J'avais envie de parler de la Fortune des Rougon, que j'ai pris sur une étagère chez ma grand-mère et lu un peu par hasard il y a quelques mois. Ou l'histoire de bourgeois insignifiants qui bradent la République à l'Empire pendant que des gamin·e·s idéalistes se font tuer pour elle.
November 16, 2025 at 11:04 AM
J'avais envie de parler de la Fortune des Rougon, que j'ai pris sur une étagère chez ma grand-mère et lu un peu par hasard il y a quelques mois. Ou l'histoire de bourgeois insignifiants qui bradent la République à l'Empire pendant que des gamin·e·s idéalistes se font tuer pour elle.
Franchement qui aurait pu prédire ?
November 15, 2025 at 1:59 PM
Franchement qui aurait pu prédire ?
November 12, 2025 at 5:57 PM
I had not expected non-asymptotic stellar internal oscillation modes to become such a problem in my life 🤔
November 11, 2025 at 2:30 PM
I had not expected non-asymptotic stellar internal oscillation modes to become such a problem in my life 🤔
Another AI-absurdity gem in this abstract: "Most of a scientist's time is spent .... doing their scientist's job"
***deep sigh***
***deep sigh***
October 20, 2025 at 8:09 AM
Another AI-absurdity gem in this abstract: "Most of a scientist's time is spent .... doing their scientist's job"
***deep sigh***
***deep sigh***
The ERC Starting grant call is officially closed, fingers crossed now ! 🤞🤞🤞
October 14, 2025 at 3:05 PM
The ERC Starting grant call is officially closed, fingers crossed now ! 🤞🤞🤞
Today on arXiv, an asteroseismic analysis of the Methuselah star !
#astrosci
arxiv.org/abs/2510.11532
#astrosci
arxiv.org/abs/2510.11532
October 14, 2025 at 7:22 AM
Today on arXiv, an asteroseismic analysis of the Methuselah star !
#astrosci
arxiv.org/abs/2510.11532
#astrosci
arxiv.org/abs/2510.11532
A super interesting results (even if a little bit frustrating) is that the population of low-activity ultra-fast rotators of Gaia remains elusive in K2: the stars seem to be located further away from the regions that the Kepler satellite was able to probe !
September 29, 2025 at 2:03 PM
A super interesting results (even if a little bit frustrating) is that the population of low-activity ultra-fast rotators of Gaia remains elusive in K2: the stars seem to be located further away from the regions that the Kepler satellite was able to probe !
We used the targets that K2 and Gaia have in common to perform an extensive comparison of the Kepler and Gaia characteristics. In brief, Kepler rotating stars are globally older (rotationally speaking) than Gaia's (remembering that Gaia has a strong observational bias towards fast rotators).
September 29, 2025 at 2:01 PM
We used the targets that K2 and Gaia have in common to perform an extensive comparison of the Kepler and Gaia characteristics. In brief, Kepler rotating stars are globally older (rotationally speaking) than Gaia's (remembering that Gaia has a strong observational bias towards fast rotators).
It is paper time ! If you wondered how the Gaia catalogue of solar-like rotators compared with the stars observed by the Kepler/K2 missions here are some elements of answers !
Here is the link to the article we published in A&A:
www.aanda.org/articles/aa/...
#stellarastro
Here is the link to the article we published in A&A:
www.aanda.org/articles/aa/...
#stellarastro
September 29, 2025 at 1:57 PM
It is paper time ! If you wondered how the Gaia catalogue of solar-like rotators compared with the stars observed by the Kepler/K2 missions here are some elements of answers !
Here is the link to the article we published in A&A:
www.aanda.org/articles/aa/...
#stellarastro
Here is the link to the article we published in A&A:
www.aanda.org/articles/aa/...
#stellarastro
It was a great pleasure to give the lecture on Stellar rotation and activity last week at the Evry Schatzman School ! ✨ For those interested the slides should be soon available on Zenodo ! (and I hope to be able to write a digest of the lecture if I find the time to do it !)
September 29, 2025 at 7:53 AM
It was a great pleasure to give the lecture on Stellar rotation and activity last week at the Evry Schatzman School ! ✨ For those interested the slides should be soon available on Zenodo ! (and I hope to be able to write a digest of the lecture if I find the time to do it !)
Start of the Evry Schatzman school on Stellar Physics in the PLATO era !
September 22, 2025 at 6:37 AM
Start of the Evry Schatzman school on Stellar Physics in the PLATO era !
Final step: Milan-Modane, to be welcome in Aussois by fog and rain 🌧️🌧️🌧️
September 21, 2025 at 5:01 PM
Final step: Milan-Modane, to be welcome in Aussois by fog and rain 🌧️🌧️🌧️
Second step, the Rome-Milan high speed train, followed by a few hours of break in Milan
September 21, 2025 at 2:37 PM
Second step, the Rome-Milan high speed train, followed by a few hours of break in Milan
For those who don't know, when the train arrives in Messina, it embarks on a ferryboat that brings it to Villa San Giovanni on the other side of the strait, in Calabria, the crossing is just about 20 minutes but the full maneuver lasts about two hours !
September 21, 2025 at 5:43 AM
For those who don't know, when the train arrives in Messina, it embarks on a ferryboat that brings it to Villa San Giovanni on the other side of the strait, in Calabria, the crossing is just about 20 minutes but the full maneuver lasts about two hours !
This week I am going to Aussois to give a lecture at the Évry Schatzman school of stellar physics ! ✨
I am travelling by train from Catania, first step the Catania-Rome night train with the Messina's strait crossing ! 🚂
I am travelling by train from Catania, first step the Catania-Rome night train with the Messina's strait crossing ! 🚂
September 21, 2025 at 5:39 AM
This week I am going to Aussois to give a lecture at the Évry Schatzman school of stellar physics ! ✨
I am travelling by train from Catania, first step the Catania-Rome night train with the Messina's strait crossing ! 🚂
I am travelling by train from Catania, first step the Catania-Rome night train with the Messina's strait crossing ! 🚂
Standard Catania observatory morning routine when the coffee machines of the building are down because the company that manages them decided for some reason not to pay their electricity bill ☕
September 9, 2025 at 6:45 AM
Standard Catania observatory morning routine when the coffee machines of the building are down because the company that manages them decided for some reason not to pay their electricity bill ☕
Huge crowd in Catania to support the departure of the Gaza Sumud Flotilla
September 3, 2025 at 6:24 PM
Huge crowd in Catania to support the departure of the Gaza Sumud Flotilla
Always a nice view to have from the lab 🌋
September 1, 2025 at 8:39 AM
Always a nice view to have from the lab 🌋
Some very beautiful 3D simulations of turbulence in protoplanetary discs on today's arXiv ! ☄️
arxiv.org/abs/2508.20839
arxiv.org/abs/2508.20839
August 29, 2025 at 12:25 PM
Some very beautiful 3D simulations of turbulence in protoplanetary discs on today's arXiv ! ☄️
arxiv.org/abs/2508.20839
arxiv.org/abs/2508.20839
Lu dans @mediapart.fr ce matin. Comment ressentir autre chose qu'une rage intense et profonde envers les responsables d'une situation pareille ?
August 28, 2025 at 6:43 AM
Lu dans @mediapart.fr ce matin. Comment ressentir autre chose qu'une rage intense et profonde envers les responsables d'une situation pareille ?
The authors were able to characterise about ~450 of them, which is promising for future studies on stellar evolution model calibration and asteroseismic scaling relations !
August 22, 2025 at 1:59 PM
The authors were able to characterise about ~450 of them, which is promising for future studies on stellar evolution model calibration and asteroseismic scaling relations !
These stars are challenging to characterise with the 30-minute sampling of Kepler because, as some of the oscillation modes are temporally undersampled, their seismic signature is folded around the Nyquist frequency of the spectrum !
August 22, 2025 at 1:54 PM
These stars are challenging to characterise with the 30-minute sampling of Kepler because, as some of the oscillation modes are temporally undersampled, their seismic signature is folded around the Nyquist frequency of the spectrum !
Probably best to laugh about the level of hubris reached 🤡
August 14, 2025 at 7:40 AM
Probably best to laugh about the level of hubris reached 🤡