Abstract
We present our results of numerical simulations of the most massive primordial stars. For the extremely massive non-rotating Pop III stars over 300M⊙, they would simply die as black holes. But the Pop III stars with initial masses 140 - 260M⊙ may have died as gigantic explosions called pair-instability supernovae (PSNe). We use a new radiation-hydrodynamics code CASTRO to study evolution of PSNe. Our models follow the entire explosive burning and the explosion until the shock breaks out from the stellar surface. In our simulations, we find that fluid instabilities occurred during the explosion. These instabilities are driven by both nuclear burning and hydrodynamical instability. In the red supergiant models, fluid instabilities can lead to significant mixing of supernova ejecta and alter the observational signature.
| Original language | English |
|---|---|
| Title of host publication | First Stars IV - From Hayashi to the Future |
| Subtitle of host publication | Kyoto, Japan; 21-25 May 2012 |
| Editors | Masayuki Umemura, Kazuyuki Omukai |
| Place of Publication | USA |
| Publisher | AIP Publishing |
| Pages | 340-342 |
| Number of pages | 3 |
| ISBN (Print) | 9780735410923 |
| DOIs | |
| Publication status | Published - 2012 |
| Event | Conference on FIRST STARS - From Hayashi to the Future 2012 - Kyoto, Japan Duration: 21 May 2012 → 25 May 2012 Conference number: 4th |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Publisher | AIP Publishing |
| Volume | 1480 |
| ISSN (Print) | 0094-243x |
Conference
| Conference | Conference on FIRST STARS - From Hayashi to the Future 2012 |
|---|---|
| Country | Japan |
| City | Kyoto |
| Period | 21/05/12 → 25/05/12 |
Keywords
- Pair-Instability Supernovae
- Pop III Stars
Cite this
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Fates of the most massive primordial stars. / Chen, Ke-Jung; Heger, Alexander; Almgren, Ann; Woosley, Stan.
First Stars IV - From Hayashi to the Future: Kyoto, Japan; 21-25 May 2012. ed. / Masayuki Umemura; Kazuyuki Omukai. USA : AIP Publishing, 2012. p. 340-342 (AIP Conference Proceedings ; Vol. 1480).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research
TY - GEN
T1 - Fates of the most massive primordial stars
AU - Chen, Ke-Jung
AU - Heger, Alexander
AU - Almgren, Ann
AU - Woosley, Stan
PY - 2012
Y1 - 2012
N2 - We present our results of numerical simulations of the most massive primordial stars. For the extremely massive non-rotating Pop III stars over 300M⊙, they would simply die as black holes. But the Pop III stars with initial masses 140 - 260M⊙ may have died as gigantic explosions called pair-instability supernovae (PSNe). We use a new radiation-hydrodynamics code CASTRO to study evolution of PSNe. Our models follow the entire explosive burning and the explosion until the shock breaks out from the stellar surface. In our simulations, we find that fluid instabilities occurred during the explosion. These instabilities are driven by both nuclear burning and hydrodynamical instability. In the red supergiant models, fluid instabilities can lead to significant mixing of supernova ejecta and alter the observational signature.
AB - We present our results of numerical simulations of the most massive primordial stars. For the extremely massive non-rotating Pop III stars over 300M⊙, they would simply die as black holes. But the Pop III stars with initial masses 140 - 260M⊙ may have died as gigantic explosions called pair-instability supernovae (PSNe). We use a new radiation-hydrodynamics code CASTRO to study evolution of PSNe. Our models follow the entire explosive burning and the explosion until the shock breaks out from the stellar surface. In our simulations, we find that fluid instabilities occurred during the explosion. These instabilities are driven by both nuclear burning and hydrodynamical instability. In the red supergiant models, fluid instabilities can lead to significant mixing of supernova ejecta and alter the observational signature.
KW - Pair-Instability Supernovae
KW - Pop III Stars
UR - http://www.scopus.com/inward/record.url?scp=84875544025&partnerID=8YFLogxK
U2 - 10.1063/1.4754380
DO - 10.1063/1.4754380
M3 - Conference Paper
SN - 9780735410923
T3 - AIP Conference Proceedings
SP - 340
EP - 342
BT - First Stars IV - From Hayashi to the Future
A2 - Umemura, Masayuki
A2 - Omukai, Kazuyuki
PB - AIP Publishing
CY - USA
ER -