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SUMMARY:Effects of dynamical interactions on stars and planets in their bi
 rth environment - Christina Schoettler (Keele University)
DTSTART:20250211T130000Z
DTEND:20250211T140000Z
UID:TALK227065@talks.cam.ac.uk
CONTACT:Dr Dolev Bashi
DESCRIPTION:Most stars form in grouped or clustered environments with othe
 r stars. These star-forming regions can survive for millions of years but 
 can change dramatically over just a short period of time - either collapsi
 ng under their own gravity or expanding. So\, what we see today might not 
 be what they looked like initially during their formation. While a cluster
  is contracting or expanding\, stars can pass very close to each other. Th
 is can lead to them being flung out of their birth region to become runawa
 y stars. Planets that might already exist in an exoplanet system may have 
 their orbits altered compared to their formation\, be ejected from their s
 ystem\, be stolen by passing stars\, or collide with each other. In this s
 eminar\, I will discuss how N-body simulations and observations can be use
 d to investigate these interactions. I will talk about how runaway stars c
 an tell us something about the initial conditions of these regions. How ob
 servations from telescopes like Gaia\, can be used to search for these eje
 cted stars in the night sky. I will then move on to the planetary systems 
 and how they are affected and possibly altered by interactions in their bi
 rth environment. In particular\, I will discuss\, if the Kepler dichotomy 
 (the apparent excess of single-transit systems compared to multi-transit s
 ystems) can be explained by birth environment interactions and if there is
  a difference in the effects of internal and external perturbations on pla
 net systems.\n
LOCATION:HOYLE LECTURE THEATRE + ONLINE - Details to be sent by email
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