A projected Nesterov-Kaczmarz approach to stellar population-kinematic distribution reconstruction in Extragalactic Archaeology

Autor:	Hinterer, Fabian, Hubmer, Simon, Jethwa, Prashin, Soodhalter, Kirk M., van de Ven, Glenn, Ramlau, Ronny
Rok vydání:	2022
Předmět:	Mathematics - Numerical Analysis Astrophysics - Astrophysics of Galaxies Astrophysics - Instrumentation and Methods for Astrophysics
Druh dokumentu:	Working Paper
Popis:	In this paper, we consider the problem of reconstructing a galaxy's stellar population-kinematic distribution function from optical integral field unit measurements. These quantities are connected via a high-dimensional integral equation. To solve this problem, we propose a projected Nesterov-Kaczmarz reconstruction (PNKR) method, which efficiently leverages the problem structure and incorporates physical prior information such as smoothness and non-negativity constraints. To test the performance of our reconstruction approach, we apply it to a dataset simulated from a known ground truth density, and validate it by comparing our recoveries to those obtained by the widely used pPXF software. Comment: 34 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2206.03925 Zobrazit plný text záznamu View this record from Arxiv