20-24 March 2023
Haus H, Telegrafenberg
Europe/Berlin timezone

On the Fast (Stream) Track: Rapid construction of stellar stream paths

20 Mar 2023, 10:35
2m
Haus H, Telegrafenberg

Haus H, Telegrafenberg

Potsdam, Germany
Poster SESSION 1: From ground and space: motions, distances, chemistry and star formation measurements SESSION 1: From ground and space: motions, distances, chemistry and star formation measurements

Speaker

Nathaniel Starkman (University of Toronto)

Description

Stellar streams are sensitive probes of the Galactic potential. The likelihood of a model given stream data can only be assessed using simulations. However, comparison to simulation is challenging in a noisy 6D phase space in which even the stream paths are hard to quantify. Here we present a novel application of Self-Organizing Maps and first-order Kalman Filters to reconstruct the stream path, propagating measurement errors and data sparsity into the stream path uncertainty. The technique is Galactic- model independent, non-parametric, and works on phase-wrapped streams. We can uniformly analyze and compare data with simulation.

Do you plan to attend the symposium in-person or virtually? undecided

Primary authors

Nathaniel Starkman (University of Toronto) Jo Bovy (University of Toronto) Prof. Jeremy Webb (University of Toronto) Prof. Daniela Calvetti (Case Western Reserve University) Prof. Erkki Somersalo (Case Western Reserve University)

Presentation Materials

There are no materials yet.