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SUMMARY:The Fundamental Role of Stellar Multiplicity in Stellar Dynamics a
 nd Evolution
DTSTART:20221031T080000Z
DTEND:20221125T150000Z
DTSTAMP:20260608T143400Z
UID:indico-event-7119@indico.ph.tum.de
CONTACT:workshop@munich-iapp.de\;+49 89 35831 7200
DESCRIPTION:\n\n\nMost stars are not isolated: they are born\, live and di
 e in pairs or multiple systems. Not only stellar multiplicity is an import
 ant ingredient in the dynamic evolution of stellar clusters\, but interact
 ions play a crucial role in all the stages of stellar evolution: transfer 
 of angular momentum\, irradiation\, accretion and stripping\, merging\, et
 c.\, leading to a wide range of most interesting phenomena such as superno
 vae\, gamma-ray bursts\, or gravitational waves. The recent decade has see
 n important developments on all these fronts\, leading to the need in many
  cases to rewrite textbooks. On the one hand\, advances in observation tec
 hniques are revealing an ever-growing fraction of stars being in multiple 
 systems and the importance of binarity in many phenomena or observations. 
 On the other hand\, more modelling and theoretical works now need to inclu
 de stellar multiplicity as a major ingredient.\n\nOur meeting intends to c
 reate a dialogue between observers\, modelers and theoreticians to share p
 roblems\, ideas and methods around stellar multiplicity and interaction. T
 his is only one side of the coin: even if for some research fields stellar
  multiplicity is a given and well embedded in methods\, its importance is 
 controversial in other fields\, despite observational and/or theoretical e
 vidence. Our meeting also aims at addressing these controversies by provid
 ing a stage for the latest arguments\, and a constructive environment for 
 dialogue and fostering scientific collaboration.\n\n \n\n\n\n\nWeek 1: Mu
 ltiple stars in stellar populations and clusters and the role of binaries 
 in the study of the Universe\n\nMultiple stars play a key role in the dyna
 mics of clusters. They also need to be taken into account when studying in
 tegrated stellar populations\, including galaxies\, as the most luminous s
 tars are the product of binary evolution (Luminous Blue Variable\, Superno
 vae\, gamma-ray bursts\, gravitational wave sources\, …). Because of thi
 s\, they can also be used to probe the most distant parts of the Universe\
 , as is the case for Type Ia supernovae which play a key role in determini
 ng the Hubble constant and the acceleration of the expansion of the Univer
 se.\n\n \n\nWeek 2: Multiple stars and their close environments\n\nBinary
  and multiple stars impact considerably their close environment\, whether 
 on small or large scales. For example\, binaries are now thought to be res
 ponsible for the morphology and possibly also the formation of a majority 
 of planetary nebulae. Some systems resulting from binary interactions are 
 also producers of specific chemical elements (e.g. r-process elements like
  gold is thought to be produced in mergers) or of dust. As such they contr
 ibute to the chemical evolution of galaxies. Another related question is h
 ow does binarity affect the formation of planets. Some planets have been f
 ound around binary system\, even around post-mass transfer systems\, and t
 his is a very hot current topic of research. We will also cover here the o
 bservational tools that can be used for the study of binaries.\n\n \n\nWe
 ek 3: Topical conference “ImBaSE 2022”\n\nThe Impact of Binary Stars o
 n Stellar Evolution 2022\, to be held at Max Planck Institute for Astrophy
 sics.\n\n \n\nWeek 4: Products of multiple stars evolution\n\nThe final w
 eek will be devoted to the study of the final products of binary and multi
 ple star evolution. Here we will consider questions such as:\n- Is the end
  of life of massive stars dominated by binary interaction?\n- Can we form 
 Be stars without binary interaction?\n- What is currently missing from num
 erical simulations of mass transfer and of the common envelope evolution?\
 n- Is common envelope evolution a universal process or are there multiple 
 mechanisms and pathways of the most extreme binary interaction?\n- What ar
 e the multiple pathways that lead to formation of gravitational wave trans
 ients? What does the current gravitational wave transient catalogue tell u
 s about binary evolution?\n- What is the role of binary interactions in th
 e diversity of core-collapse and thermonuclear supernovae?\n\n\n\n\n\n\n\n
 https://indico.ph.tum.de/event/7119/
LOCATION:MIAPbP
URL:https://indico.ph.tum.de/event/7119/
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