BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LAPTh - ECPv6.15.17//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:LAPTh
X-ORIGINAL-URL:https://www.lapth.cnrs.fr
X-WR-CALDESC:Évènements pour LAPTh
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20210328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20211031T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20220623T110000
DTEND;TZID=Europe/Paris:20220623T120000
DTSTAMP:20260405T122819
CREATED:20220620T163003Z
LAST-MODIFIED:20220620T163038Z
UID:7831-1655982000-1655985600@www.lapth.cnrs.fr
SUMMARY:Star forming galaxies as cosmic ray factories: a multimessenger view
DESCRIPTION:Star forming galaxies (SFGs) are powerful factories of high-energy cosmic rays.\nTheir star formation rate (SFR) is a key physical property characterizing both the total energy budget and the transport conditions of such particle populations. Tight correlations are in fact observed between the SFR and the non-thermal radio and gamma-ray luminosity of several SFGs. I will discuss the nature of such correlations focusing on the physical implications on the particle transport.\n \nThe most active SFGs are known as starburst galaxies (SBGs). These objects are unique environments for cosmic rays since they might be able to confine most of their injected particles. Such a calorimetric scenario is of great interest for the production of hadronic byproducts such as non-thermal radiation and high-energy neutrinos.\nI will illustrate the main features and the impact of calorimetry on the spectral energy distribution of these galaxies.\nIn addition\, since SBGs are also inferred to be highly numerous at cosmological distances\, I will discuss their possible contribution to the diffuse fluxes of gamma rays and neutrinos observed by Fermi-LAT and IceCube respectively.\n \nDespite of the extreme conditions expected to be found in the interstellar medium of SBGs\, accelerators of sub-galactic scale\nsuch as supernova remnants or star clusters are unlikely to overcome the PeV range.  \nOn the other hand\, the enhanced rate of supernovae characterizing SBGs can launch powerful winds with bubble structures where particles can be efficiently accelerated at higher energies.\nI will discuss a physical model describing particle acceleration and transport in these galactic wind bubbles.\nFinally\, I will conclude presenting the multi-messenger potential of SBGs and their wind bubbles in terms of gamma rays\, neutrinos and escaping cosmic rays.
URL:https://www.lapth.cnrs.fr/event/star-forming-galaxies-as-cosmic-ray-factories-a-multimessenger-view/
CATEGORIES:Weekly seminars
END:VEVENT
END:VCALENDAR