Pascal Petit

A BCool survey of stellar magnetic cycles. arxiv.org/abs/2412.09365

Characterizing Planetary Systems With SPIRou: M-dwarf Planet-search Survey And The Multiplanet Systems GJ 876 And GJ 1148 astrobiology.com/2023/07/charac… #astrobiology #exoplanet #astronomy #telescope

@astro_derek @ashleychontos Yes! Sorry for skipping this earlier reference.

@pascalou_petit @ashleychontos And Buzasi+ 2005 ;)

paging any asteroseismology folks and/or other related enthusiasts… (tryna see something) do you have a favorite asteroseismic detection that you do not see on the attached figure? If so, send me the star name and reference below!👇🏼

Aurore boréale ce soir près d’Argentat en Corrèze !

@tanguy_dusserre Le code MAYONNAISE, on en parle ? arxiv.org/abs/2008.05170

Bon ça suffit les physiciens stellaires là, QUI a décidé d’appeler un modèle de couronne solaire COCONUT ???

L'activité solaire varie selon un cycle régulier d'environ 11 ans, où son champ magnétique s'inverse. Des signes d'inversions magnétiques ont aussi été observés chez une petite étoile naine rouge, AD Leonis, dont le champ magnétique est 1000 fois + intense que le Soleil. 1/2

[Actu #Sciences @IRAP_France] Surveillez les champs magnétiques stellaires : ils sont changeants ! Travaux publiés dans la revue @AandA_journal impliquant Stefano Bellotti et ses collègues ➡️bit.ly/3S6rupo

ATMOSPHERIX I- An open source high resolution transmission spectroscopy pipeline for exoplanets atmospheres with SPIRou arxiv.org/abs/2308.14510 II- Characterising exopl atmospheres through transmission spectroscopy with SPIRou arxiv.org/abs/2308.14511 @SPIRou_astro @CFHTelescope

PAPER DAY! Another huge effort from a diverse team of asteroseismologists, spectpolarimetricians, and others to help unlock the secrets of the exoplanet host star lambda Serpentis. Interested in the possibility of PLANETARY ENGULFMENT? Read on: arxiv.org/abs/2308.09808

CUTE reveals escaping metals in the upper atmosphere of the ultra-hot Jupiter WASP-189b A. G. Sreejith, et al. ApJL, arxiv.org/abs/2308.05726

Monitoring the large-scale magnetic field of AD Leo with SPIRou, ESPaDOnS and Narval. Toward a magnetic polarity reversal? S. Bellotti, et al. A&A —> a substantially increased dipole obliquity, while the topology remained predominantly poloidal and dipolar arxiv.org/abs/2307.01016

The Space Weather Around The Exoplanet GJ 436b astrobiology.com/2023/06/the-sp… #astrobiology #spaceweather #exoplanet

[#SoutenanceDeThèse @IRAP_France] ce jeudi à 14h : Stefano BELLOTTI présentera le fruit de ses travaux concernant la recherche d'#exoplanètes habitables au moyen du spectropolarimètre @SPIRou_astro : irap.omp.eu/event/searchin… cc @pascalou_petit

@FredericPaletou Ephèse man fr.wikipedia.org/wiki/Héraclite

PAPER DAY! Coming to @arxiv this evening: "Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and tau Cet". Let's talk about tau Ceti, the nearest single G-type star to the solar system (3.7 parsecs), which hosts several planets (two near the HZ) and a debris disk.

(2) Complete Zeeman Doppler Imaging map of the younger G8 star 61 UMa from the hard work of @pascalou_petit and the #BCool team. ALSO: archival Ly-alpha (@NASAHubble) and X-ray data, rotation periods from @MtWilsonObs, radii and masses from interferometry, asteroseismology, etc.

Beautiful crowd and great review talks at #PPVII