different stellar population properties 04.07.2018 Alina Bcker - - PowerPoint PPT Presentation

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Credit: https://apod.nasa.gov/apod/ap140105.html Alina Bcker (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

SLIDE 1

Credit: https://apod.nasa.gov/apod/ap140105.html

RECOVERING THE ACCRETION HISTORY OF GALAXIES FROM INTEGRATED SPECTRA

Alina Böcker (MPIA)

Ryan Leaman (MPIA), Glenn van de Ven (MPIA/ESO), Mark Norris (University of Central Lancashire), Rob Crain (API Liverpool)

SLIDE 2

1. Ex-situ & in-situ stars have

different stellar population properties

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 3

Global Galaxy Properties Mass-Metallicity Relation

Kirby et al, 2013 Gallazzi et al, 2005

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 4

Internal Galaxy Properties Age-Metallicity Relation

Leaman et al, 2013 Boecker et al, in prep.

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-Metallicity Relation

Kirby et al, 2013 Gallazzi et al, 2005

Global Galaxy Properties

1011 M☉ 106 M☉

SLIDE 5

2. Obtain mass distribution in

age-metallicity space from a single integrated spectrum

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 6

EAGLE Simulation

M* ≈ 1012 M☉ All Stars

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 7

EAGLE Simulation

M* ≈ 1012 M☉ All Stars

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 8

EAGLE Simulation

M* ≈ 1012 M☉ All Stars

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 9

True mass distribution in age metallicity space

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 10

True mass distribution in age metallicity space

Integrated mock spectrum

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

SLIDE 11

Integrated mock spectrum

True mass distribution in age metallicity space

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Full Spectral Fitting (pPXF) + Optimized Regularization

SLIDE 12

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

SLIDE 13

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

SLIDE 14

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-dependent Age-Metallicity Templates

SLIDE 15

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-dependent Age-Metallicity Templates

SLIDE 16

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Mass-dependent Age-Metallicity Templates Accreted Satellite Mass Function

SLIDE 17

Accreted Satellite Mass Function

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

106 Mass-dependent Age-Metallicity Templates

SLIDE 18

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

107 Mass-dependent Age-Metallicity Templates Accreted Satellite Mass Function

SLIDE 19

Mass-dependent Age-Metallicity Templates

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

108 Accreted Satellite Mass Function

SLIDE 20

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Internal Galaxy Properties

Boecker et al, in prep.

Accreted Satellite Mass Function

SLIDE 21

Boecker et al, in prep.

Accreted Satellite Mass Function Ex-Situ Fraction vs. Total Stellar Mass

Rodriguez-Gomez et al, 2016 Total Accretion Fraction

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg

Global Galaxy Properties Internal Galaxy Properties

Illustris Simulation

SLIDE 22

4. Novel method for deriving a

galaxy’s accretion history from its integrated spectrum

04.07.2018 Alina Böcker (MPIA) Stellar Halos Conference, Heidelberg