BEGIN:VCALENDAR PRODID:-//eluceo/ical//2.0/EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT UID:566af2232da704f335255ceb204d1af5 DTSTAMP:20261008T160210Z SUMMARY:Seminar by Asier Lambarri on the topic of Star formation in the hal o of the Vintergatan simulations DESCRIPTION:Contact: aline.novais@fysik.lu.se\n\nSeminar by Asier Lambarri\ , from the Universidad Complutense de Madrid\, on the topic of star format ion in the halo of the Vintergatan simulations.Title: In situ stellar halo substructures in the Vintergatan SimulationsAbstract: Stellar haloes of m assive galaxies and the substructures they contain are typically old\, aki n to the long timescales of merging processes in comparison to star-format ion\, quenching and stellar evolution timescales. There exists\, however\, an instance of a \;blue stream \;around NGC 7241 which\, given th e relatively low statistics in LSB observations and the typical 29 mag/arc sec² reached by current surveys\, _ the question of how likely these stru ctures may be in Milky-Way like haloes. The presence of blue substructures in the halo thus should mean in-situ star formation. In this work\, we ai m to provide a prediction of how likely these structures are using the Vin tergatan simulations. We consider the formation of these structures throug h stripping of stars in infalling galaxies\, inspired by one of the possib le explanations for the \;blue stream\, and through star-formation of CGM gas\, either coming from the IGM or accreted satellites. We find a tot al of 24 candidates between the last major merger and current time\, with preliminary analysis showing the most massive ones should be detectable by ARRAKIHS as \;blue-LSBF a few hundred Myr after the initial starburst . Three of such structures emerge from perturbations of cold streams of ga s in the outer parts of the galactic halo. Although the low number of simu lated galaxies prohibits drawing any statistically significant conclusions regarding the Vintergatan numerical model\, this pilot study serves to sh ow that such \;blue \;structures are able to form in high-res zoom -in simulations.\n\nMore information about the event: https://www.astro.lu .se/calendar/seminar-asier-lambarri-topic-star-formation-halo-vintergatan- simulations DTSTART;TZID=GMT:20261105T121500 DTEND;TZID=GMT:20261105T121500 LOCATION:Charlier (A401) END:VEVENT END:VCALENDAR