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SUMMARY:Orbital Torus Imaging: Using elemental abundances to map orbital s
 tructure and mass in the Galactic disc - Daniel Horta Darrington (CCA\, Ne
 w York)
DTSTART:20230517T121500Z
DTEND:20230517T124000Z
UID:TALK200989@talks.cam.ac.uk
CONTACT:Hannah Uebler
DESCRIPTION:Under the assumption of a simple and time invariant potential\
 , many Galactic dynamics techniques use tools (e.g.\, Jeans or Schwartzchi
 ld models) to infer the Milky Way’s potential from stellar kinematic obs
 ervations. Albeit useful\, these methods rely heavily on parameterised pot
 ential models of the Galaxy and must take into account non-trivial selecti
 on function effects. However\, large-scale spectroscopic surveys now suppl
 y information beyond kinematics in the form of precise stellar label measu
 rements (e.g.\, elemental abundances). In this talk\, I will present a new
  framework that uses kinematic and element abundance measurements for dyna
 mical inference: Orbital Torus Imaging. This method is advantageous as it 
 is much less affected by selection function effects and does not require p
 arameterisation of a potential model. Using this framework\, I will presen
 t preliminary results utilising the latest APOGEE and Gaia data on mapping
  the orbital structure and mass of the Galactic disc using chemical abunda
 nce information. These early findings reveal the power of Orbital Torus Im
 aging\, and highlight a promising new avenue for dynamical inference that 
 synergises stellar labels and kinematic observations delivered by large sc
 ale stellar surveys of the Galaxy.
LOCATION:The Hoyle Lecture Theatre + Zoom 
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