Transition of the initial mass function in the galaxy based on binary population synthesis

Takuma Suda; Yutaka Komiya; Shimako Yamada; Yutaka Katsuta; Wako Aoki; Pilar Gil-Pons; Carolyn L. Doherty; Simon W. Campbell; Peter R. Wood; Masayuki Y. Fujimoto

doi:10.1063/1.4754407

Transition of the initial mass function in the galaxy based on binary population synthesis

Takuma Suda^*, Yutaka Komiya, Shimako Yamada, Yutaka Katsuta, Wako Aoki, Pilar Gil-Pons, Carolyn L. Doherty, Simon W. Campbell, Peter R. Wood, Masayuki Y. Fujimoto

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › peer-review

2 Citations (Scopus)

Abstract

We construct a binary population synthesis model to explore the star formation history of the Galaxy. The model includes the effects of AGB evolution and binary mass transfer for a given IMF and binary period distribution function. We discuss the origins of extremely metal-poor stars with enhancement of carbon or nitrogen, with the possible effect of mass loss at low-metallicity taken into account. Our results strongly support high-mass dominated star formation during the early epoch of the Galaxy in order to explain the observed frequency of carbon and nitrogen enhancements that are thought to result from mass transfer from a former AGB binary companion. Our model also suggests that the IMF had a transition phase at [Fe/H] ∼ -2.

Original language	English
Title of host publication	First Stars IV - From Hayashi to the Future -
Pages	421-423
Number of pages	3
DOIs	https://doi.org/10.1063/1.4754407
Publication status	Published - 2012
Event	1st Stars IV: From Hayashi to the Future - Kyoto, Japan Duration: 21 May 2012 → 25 May 2012

Publication series

Name	AIP Conference Proceedings
Volume	1480
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	1st Stars IV: From Hayashi to the Future
Country/Territory	Japan
City	Kyoto
Period	21/05/12 → 25/05/12

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10.1063/1.4754407

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Suda, T., Komiya, Y., Yamada, S., Katsuta, Y., Aoki, W., Gil-Pons, P., Doherty, C. L., Campbell, S. W., Wood, P. R., & Fujimoto, M. Y. (2012). Transition of the initial mass function in the galaxy based on binary population synthesis. In First Stars IV - From Hayashi to the Future - (pp. 421-423). (AIP Conference Proceedings; Vol. 1480). https://doi.org/10.1063/1.4754407

@inproceedings{9aee99a29a2841228500cc14f05b7085,

title = "Transition of the initial mass function in the galaxy based on binary population synthesis",

abstract = "We construct a binary population synthesis model to explore the star formation history of the Galaxy. The model includes the effects of AGB evolution and binary mass transfer for a given IMF and binary period distribution function. We discuss the origins of extremely metal-poor stars with enhancement of carbon or nitrogen, with the possible effect of mass loss at low-metallicity taken into account. Our results strongly support high-mass dominated star formation during the early epoch of the Galaxy in order to explain the observed frequency of carbon and nitrogen enhancements that are thought to result from mass transfer from a former AGB binary companion. Our model also suggests that the IMF had a transition phase at [Fe/H] ∼ -2.",

keywords = "AGB stars, binary evolution, stellar evolution",

author = "Takuma Suda and Yutaka Komiya and Shimako Yamada and Yutaka Katsuta and Wako Aoki and Pilar Gil-Pons and Doherty, \{Carolyn L.\} and Campbell, \{Simon W.\} and Wood, \{Peter R.\} and Fujimoto, \{Masayuki Y.\}",

year = "2012",

doi = "10.1063/1.4754407",

language = "English",

isbn = "9780735410923",

series = "AIP Conference Proceedings",

pages = "421--423",

booktitle = "First Stars IV - From Hayashi to the Future -",

note = "1st Stars IV: From Hayashi to the Future ; Conference date: 21-05-2012 Through 25-05-2012",

}

Suda, T, Komiya, Y, Yamada, S, Katsuta, Y, Aoki, W, Gil-Pons, P, Doherty, CL, Campbell, SW, Wood, PR & Fujimoto, MY 2012, Transition of the initial mass function in the galaxy based on binary population synthesis. in First Stars IV - From Hayashi to the Future -. AIP Conference Proceedings, vol. 1480, pp. 421-423, 1st Stars IV: From Hayashi to the Future, Kyoto, Japan, 21/05/12. https://doi.org/10.1063/1.4754407

TY - GEN

T1 - Transition of the initial mass function in the galaxy based on binary population synthesis

AU - Suda, Takuma

AU - Komiya, Yutaka

AU - Yamada, Shimako

AU - Katsuta, Yutaka

AU - Aoki, Wako

AU - Gil-Pons, Pilar

AU - Doherty, Carolyn L.

AU - Campbell, Simon W.

AU - Wood, Peter R.

AU - Fujimoto, Masayuki Y.

PY - 2012

Y1 - 2012

N2 - We construct a binary population synthesis model to explore the star formation history of the Galaxy. The model includes the effects of AGB evolution and binary mass transfer for a given IMF and binary period distribution function. We discuss the origins of extremely metal-poor stars with enhancement of carbon or nitrogen, with the possible effect of mass loss at low-metallicity taken into account. Our results strongly support high-mass dominated star formation during the early epoch of the Galaxy in order to explain the observed frequency of carbon and nitrogen enhancements that are thought to result from mass transfer from a former AGB binary companion. Our model also suggests that the IMF had a transition phase at [Fe/H] ∼ -2.

AB - We construct a binary population synthesis model to explore the star formation history of the Galaxy. The model includes the effects of AGB evolution and binary mass transfer for a given IMF and binary period distribution function. We discuss the origins of extremely metal-poor stars with enhancement of carbon or nitrogen, with the possible effect of mass loss at low-metallicity taken into account. Our results strongly support high-mass dominated star formation during the early epoch of the Galaxy in order to explain the observed frequency of carbon and nitrogen enhancements that are thought to result from mass transfer from a former AGB binary companion. Our model also suggests that the IMF had a transition phase at [Fe/H] ∼ -2.

KW - AGB stars

KW - binary evolution

KW - stellar evolution

UR - https://www.scopus.com/pages/publications/84875496110

U2 - 10.1063/1.4754407

DO - 10.1063/1.4754407

M3 - Conference Paper

SN - 9780735410923

T3 - AIP Conference Proceedings

SP - 421

EP - 423

BT - First Stars IV - From Hayashi to the Future -

T2 - 1st Stars IV: From Hayashi to the Future

Y2 - 21 May 2012 through 25 May 2012

ER -

Transition of the initial mass function in the galaxy based on binary population synthesis

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