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Dwarf elliptical galaxies as probes of galaxy formation ...

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Dwarf elliptical galaxies as probes of galaxy formation and evolution Marina Trevisan Reinaldo de Carvalho, Fabricio Ferrari, Ignacio Ferreras, Francesco la Barbera, Ignacio de la Rosa 24 April 2013
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Page 1: Dwarf elliptical galaxies as probes of galaxy formation ...

Dwarf elliptical galaxies as probes of galaxy formation and evolution

Marina Trevisan

Reinaldo de Carvalho, Fabricio Ferrari, Ignacio Ferreras, Francesco la Barbera, Ignacio de la Rosa

24 April 2013

Page 2: Dwarf elliptical galaxies as probes of galaxy formation ...

Galaxy Formation and Evolution

● Galaxy evolution/formation scenario must be able to predict and describe the properties of galaxies in all mass ranges.

● Different processes acting in galaxies with different masses:

– SN/AGN feedback;

– IMF;

– Environment...

Page 3: Dwarf elliptical galaxies as probes of galaxy formation ...

● Dificuldade na classificação

M (M☉)

5 ∙ 10111 ∙ 10111 ∙ 10101 ∙ 1095 ∙ 108

Elliptical Galaxies

dwarfs

Page 4: Dwarf elliptical galaxies as probes of galaxy formation ...

Galaxy Zoo Project

Visual Classification

Page 5: Dwarf elliptical galaxies as probes of galaxy formation ...

Parameter Space

Elliptical M > 3 ∙ 1010 M☉

Elliptical M > 3 ∙ 1010 M☉

Elliptical M < 1 ∙ 1010 M☉

Elliptical M < 1 ∙ 1010 M☉

Spiral M < 1 ∙ 1010 M☉Spiral M < 1 ∙ 1010 M☉

Asymmetry

Sersic index

Concentration

Asymmetry

Concentration

Sersic index

Page 6: Dwarf elliptical galaxies as probes of galaxy formation ...

● Dwarf sample:

– Stellar population analysis   Star formation history, →chemical enrichment

Formation and Evolution of Dwarf ETGs

Page 7: Dwarf elliptical galaxies as probes of galaxy formation ...

de la Rosa et al. 2011

Trevisan et al. 2012

Mass Assembly

Page 8: Dwarf elliptical galaxies as probes of galaxy formation ...

Trevisan et al. 2012

Chemical Enrichment

Page 9: Dwarf elliptical galaxies as probes of galaxy formation ...

● Dwarf sample:

– Stellar population analysis   Star formation history, →chemical enrichment

● Different environments

Formation and Evolution of Dwarf ETGs

Page 10: Dwarf elliptical galaxies as probes of galaxy formation ...

Formation and Evolution of Dwarf ETGs

● Dwarf sample:

– Stellar population analysis   Star formation history, →chemical enrichment

● Different environments

– Explore stellar population properties in the outer regions

Page 11: Dwarf elliptical galaxies as probes of galaxy formation ...
Page 12: Dwarf elliptical galaxies as probes of galaxy formation ...

→ Web-Starlight

→SSP models with variable chemical abundances

Correlations between galaxy properties and evolutionary

stage of groups

Correlation between

σ and IMF slope

Radial gradients with VLT data

2013

2012

Page 13: Dwarf elliptical galaxies as probes of galaxy formation ...

Thank you!


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