different stellar population properties 04.07.2018 Alina Bcker - PowerPoint PPT Presentation

Credit: https://apod.nasa.gov/apod/ap140105.html Alina Böcker (MPIA) Ryan Leaman (MPIA), Glenn van de Ven (MPIA/ESO), Mark Norris (University of Central Lancashire), Rob Crain (API Liverpool) RECOVERING THE ACCRETION HISTORY OF GALAXIES FROM INTEGRATED SPECTRA

1. Ex-situ & in-situ stars have different stellar population properties 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Global Galaxy Properties Mass-Metallicity Relation Kirby et al, 2013 Gallazzi et al, 2005 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Global Galaxy Properties Internal Galaxy Properties 10 11 M ☉ 10 6 M ☉ Mass-Metallicity Relation Age-Metallicity Relation Kirby et al, 2013 Leaman et al, 2013 Gallazzi et al, 2005 Boecker et al, in prep. 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

2. Obtain mass distribution in age-metallicity space from a single integrated spectrum 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

EAGLE Simulation M * ≈ 10 12 M ☉ All Stars 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

EAGLE Simulation M * ≈ 10 12 M ☉ All Stars 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

EAGLE Simulation M * ≈ 10 12 M ☉ All Stars 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

True mass distribution in age metallicity space 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

True mass distribution in age metallicity space Integrated mock spectrum 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

True mass distribution in age metallicity space Integrated mock spectrum Full Spectral Fitting (pPXF) + Optimized Regularization 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

True mass distribution in age metallicity space Integrated mock spectrum Full Spectral Fitting (pPXF) + Optimized Regularization Recovered mass distribution in age metallicity space 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

3. Create a galaxy’s accreted satellite mass function with mass-dependent age- metallicity relations 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-dependent Age-Metallicity Templates 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-dependent Age-Metallicity Templates 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-dependent Accreted Satellite Mass Age-Metallicity Templates Function 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

10 6 Mass-dependent Accreted Satellite Mass Age-Metallicity Templates Function 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

10 7 Mass-dependent Accreted Satellite Mass Age-Metallicity Templates Function 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

10 8 Mass-dependent Accreted Satellite Mass Age-Metallicity Templates Function 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Internal Galaxy Properties Accreted Satellite Mass Function Boecker et al, in prep. 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Internal Galaxy Properties Global Galaxy Properties Illustris Simulation Total Accretion Fraction Accreted Satellite Mass Function Ex-Situ Fraction vs. Total Stellar Mass Rodriguez-Gomez et al, 2016 Boecker et al, in prep. 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

4. Novel method for deriving a galaxy’s accretion history from its integrated spectrum 04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg