life and death of metal-poor massive stars – a new vision...
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Life and death of metal-poor massive stars –
A new vision for THESEUS’ science
Dorottya Szécsi
Humboldt FellowUniversity of Cologne
Symposium S4, EWASS, Lyon24th June 2019
Life and death of metal-poor massive stars –
A new vision for THESEUS’ science
Dorottya Szécsi
Humboldt FellowUniversity of Cologne
Symposium S4, EWASS, Lyon24th June 2019
Life and death of metal-poor massive stars –
A new vision for THESEUS’ science
Dorottya Szécsi
Humboldt FellowUniversity of Cologne
Symposium S4, EWASS, Lyon24th June 2019
Life and death of metal-poor massive stars –
A new vision for THESEUS’ science
Dorottya Szécsi
Humboldt FellowUniversity of Cologne
Symposium S4, EWASS, Lyon24th June 2019
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
low Z massive stars
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
low Z massive starslow Z...
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
low Z massive starslow Z...
massive?? stars
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Common envelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indense clusters
low Z massive starslow Z...
massive?? stars
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18
GW/SGRB progenitors: 3 theoriesDorottya Szécsi:
New visionfor THESEUS
Commonenvelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indenseclusters
Metal-poor massive stars
e.g. Vigna-Gómez..Szécsi+18; Szécsi’17a,b; Szécsi&Wünsch’18; Szécsi’16;
LGRB progenitor theoriesDorottya Szécsi:
New visionfor THESEUS
e.g. Yoon&Langer’05; Woosley&Heger’06; Yoon+06; Szécsi+15;Szécsi’16; Marchant+16; Szécsi’17a,b
LGRB progenitor theoriesDorottya Szécsi:
New visionfor THESEUS
Chemicallyhomogeneous
evolutionas a single star
Chemically-homogeneous
evolutionin a binary
e.g. Yoon&Langer’05; Woosley&Heger’06; Yoon+06; Szécsi+15;Szécsi’16; Marchant+16; Szécsi’17a,b
LGRB progenitor theoriesDorottya Szécsi:
New visionfor THESEUS
Chemicallyhomogeneous
evolutionas a single star
Chemically-homogeneous
evolutionin a binary
e.g. Yoon&Langer’05; Woosley&Heger’06; Yoon+06; Szécsi+15;Szécsi’16; Marchant+16; Szécsi’17a,b
LGRB progenitor theoriesDorottya Szécsi:
New visionfor THESEUS
Chemicallyhomogeneous
evolutionas a single star
Chemically-homogeneous
evolutionin a binary
e.g. Yoon&Langer’05; Woosley&Heger’06; Yoon+06; Szécsi+15;Szécsi’16; Marchant+16; Szécsi’17a,b
LGRB progenitor theoriesDorottya Szécsi:
New visionfor THESEUS
Chemicallyhomogeneous
evolutionas a single star
Chemically-homogeneous
evolutionin a binary
low Z massive stars
e.g. Yoon&Langer’05; Woosley&Heger’06; Yoon+06; Szécsi+15;Szécsi’16; Marchant+16; Szécsi’17a,b
LGRB progenitor theoriesDorottya Szécsi:
New visionfor THESEUS
Chemicallyhomogeneous
evolutionas a single star
Chemically-homogeneous
evolutionin a binary
low Z massive stars
e.g. Yoon&Langer’05; Woosley&Heger’06; Yoon+06; Szécsi+15;Szécsi’16; Marchant+16; Szécsi’17a,b
GRB progenitors Dorottya Szécsi:New vision
for THESEUS
Commonenvelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indenseclusters
Metal-poor massive stars
Chem.-hom.evolution
as single star
Chem.-hom.evolutionin a binary
GRB progenitors Dorottya Szécsi:New vision
for THESEUS
Commonenvelopein a binary
Chemically-homogeneous
evolutionin a binary
Dynamics indenseclusters
Metal-poor massive stars
Chem.-hom.evolution
as single star
Chem.-hom.evolutionin a binary
L-GRBs
S-GRBs
However...
Are they observed?Dorottya Szécsi:
New visionfor THESEUS
Are they observed?Dorottya Szécsi:
New visionfor THESEUS
Z0
Pop III
0
dwarf g.Z�50
∼10
SMCZ�10
∼150
LMCZ�4
∼300
MWZ�
>800
spectroscopy(i.e. direct evidence)
e.g. Castro+14,+18, Ramírez-Agudelo+17, Kubátová&Szécsi+18
Are they observed?Dorottya Szécsi:
New visionfor THESEUS
Z0
Pop III
0
dwarf g.Z�50
∼10
SMCZ�10
∼150
LMCZ�4
∼300
MWZ�
>800
spectroscopy(i.e. direct evidence)
GRB-progenitors theories...
e.g. Castro+14,+18, Ramírez-Agudelo+17, Kubátová&Szécsi+18
Indirect evidence!
Dwarf galaxies Dorottya Szécsi:New vision
for THESEUS
• observed: QHe ii = 1050 γ/sKehrig+2015
• explained by Chem. Hom.single starsSzécsi+15
• explained by Pop-III starse.g. Heap+16
• explained by X-ray binariesSchaerer+19
I Zwicky 18’s ionization
Indirect evidence↓
PopulationSynthesis studies
Legrand+07, Aloisi+09, Annibali+13, Kehrig+13, Lebouteiller+13
Dwarf galaxies Dorottya Szécsi:New vision
for THESEUS
• observed: QHe ii = 1050 γ/sKehrig+2015
• explained by Chem. Hom.single starsSzécsi+15
• explained by Pop-III starse.g. Heap+16
• explained by X-ray binariesSchaerer+19
I Zwicky 18’s ionization
Indirect evidence↓
PopulationSynthesis studies
Legrand+07, Aloisi+09, Annibali+13, Kehrig+13, Lebouteiller+13
Dwarf galaxies Dorottya Szécsi:New vision
for THESEUS
• observed: QHe ii = 1050 γ/sKehrig+2015
• explained by Chem. Hom.single starsSzécsi+15
• explained by Pop-III starse.g. Heap+16
• explained by X-ray binariesSchaerer+19
I Zwicky 18’s ionization
Indirect evidence↓
PopulationSynthesis studies
Legrand+07, Aloisi+09, Annibali+13, Kehrig+13, Lebouteiller+13
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
My Vision Dorottya Szécsi:New vision
for THESEUS
• a synergy between GRBs & massive stars
use GRBs to constrain theories of low-Z massive stars indirectly
luse low-Z massive star research to constrain GRB hosts
• e.g.: implement rotating stellar modelsinto population synthesis codes
• e.g.: implement collapsar conditionsinto stellar evolution code MESA
• train new PhDs in joint projects
• use existing GRB data→ prepare for THESEUS
• hold conferences to build connectionsbetween GRB & massive star communities
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