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CATEGORIES:Seminars
DESCRIPTION:Abstract: Modelling supernovae in porous photoionized Giant Molecular Clouds Galactic-scale simulations rely on sub-grid models to provide prescriptions for the coupling between supernova (SN) feedback and the interstellar medium (ISM). Many of these models are computed in 1-D to allow for an efficient way to account for the variability of ISM properties. However, parsec-scale simulations revealed that the release of energy from SNe within Giant Molecular Clouds (GMCs) can be highly asymmetrical. This is largely due to the presence of pre-SN feedback, such as ionizing radiation, that are able to carve channels along the paths of least resistance around the progenitors. Being partially confined, the SN energy escapes to the outer ISM preferentially through these channels, departing from the spherically symmetric descriptions. In this talk, I will present a suite of SPH simulations of feedback in GMCs, with novel analytical and numerical models that describe SNe detonating within compact environments. I will show that their behaviour largely deviates from that of the 1-D blasts, but the amount of deviation, on scales of tens of parsecs, is rather independent of the clouds’ porosity. Finally, I will propose some practical methods that may be used to incorporate the “channelling” effects into the sub-grid feedback models.748848
DTSTAMP:20260531T040253
DTSTART:20260610T140000
DTEND:20260610T150000
LOCATION:Fourth floor interaction area, Physics Building, Streatham Campus
SUMMARY;LANGUAGE=en-us:Astro-Seminar: Cheryl Lau
UID:1e52d4731c6891b5d0fb4cb591d9047e@www.exeter.ac.uk
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