Plenary (Payal Das)

JWST image of the Tarantula Nebula

Image credit: NASA, ESA, CSA, and STScI

JWST image of L1527 protostar and outflow

Image credit: NASA, ESA, CSA, and STScI, J. DePasquale (STScI)

Black hole distortion of light

Image credit: NASA’s Goddard Space Flight Center; background, ESA/Gaia/DPAC

JWST Deep field image

Image credit: NASA, ESA, CSA, and STScI

JWST image of NGC628 spiral galaxy

Image credit: NASA, ESA, CSA, and STScI

ALMA image of the protoplanetary disc of HL Tauri

Image credit: ALMA (ESO/NAOJ/NRAO)

Date: 07.07.2023 11:00 - 11:45

Location: CSL - Sir Stanley Thomas

Description

Dr. Payel Das

How satellites have shaped our Milky Way: the view from Gaia

Friday 7th July 2023 @ 11h00

The Gaia spacecraft has brought our Milky Way into focus in an unprecedented way. The synergy with ground-based spectroscopic surveys has provided us with photometry, 6-D phase-space coordinates, and spectra for millions of stars. I will firstly discuss the constraints the inferred dynamical, chemical, and age properties of stars have placed on a major accretion event nine Gyrs ago that may have thickened the pre-existing disc and birthed a new thin disc. I will then discuss how interactions between the Miky Way and its satellite system continue to shape the discs until the present day. To finish, I will say some words about what our new perspective on the formation of the Milky Way can reveal about the evolution of disk galaxies throughout the Universe.

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All attendees are expected to show respect and courtesy to other attendees and staff, and to adhere to the NAM Code of Conduct.