The role of dust in the early universe: The nature of cosmological reionization sources

Daisuke Yamasawa; Asao Habe; Kazuyuki Omukai; Takashi Kozasa; Takaya Nozawa; Hiroyuki Hirashita

doi:10.1063/1.4754416

The role of dust in the early universe: The nature of cosmological reionization sources

Daisuke Yamasawa, Asao Habe, Kazuyuki Omukai, Takashi Kozasa, Takaya Nozawa, Hiroyuki Hirashita

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We construct a semi-analytical model which includes a novel implementation of dust size evolution and the resulting H₂ formation on dust grains in the early universe. We investigate the cosmic star formation rate and the reionization history, taking into acount the initial mass function transition from Pop III to Pop II stars due to dust cooling. We derive the star formation efficiencies for various host dark matter halo masses and discuss effects of the value of critical dust-to-gas mass ratio, script D_cr, on the reionization history. We conclude that the reionization completes before z = 6 in the case of the fiducail value script D_cr=7.4×10 ^-8.

Original language	English
Title of host publication	First Stars IV - From Hayashi to the Future -
Pages	448-450
Number of pages	3
DOIs	https://doi.org/10.1063/1.4754416
Publication status	Published - 2012
Externally published	Yes
Event	1st Stars IV: From Hayashi to the Future - Kyoto, Japan Duration: 2012 May 21 → 2012 May 25

Publication series

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

Other

Other	1st Stars IV: From Hayashi to the Future
Country/Territory	Japan
City	Kyoto
Period	12/5/21 → 12/5/25

Keywords

dust, extinction
galaxies: ISM
galaxies: evolution
reionization

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.4754416

Cite this

@inproceedings{fa60fa17f2bd408a94fff4e19be3c729,

title = "The role of dust in the early universe: The nature of cosmological reionization sources",

abstract = "We construct a semi-analytical model which includes a novel implementation of dust size evolution and the resulting H2 formation on dust grains in the early universe. We investigate the cosmic star formation rate and the reionization history, taking into acount the initial mass function transition from Pop III to Pop II stars due to dust cooling. We derive the star formation efficiencies for various host dark matter halo masses and discuss effects of the value of critical dust-to-gas mass ratio, script Dcr, on the reionization history. We conclude that the reionization completes before z = 6 in the case of the fiducail value script Dcr=7.4×10 -8.",

keywords = "dust, extinction, galaxies: ISM, galaxies: evolution, reionization",

author = "Daisuke Yamasawa and Asao Habe and Kazuyuki Omukai and Takashi Kozasa and Takaya Nozawa and Hiroyuki Hirashita",

year = "2012",

doi = "10.1063/1.4754416",

language = "English",

isbn = "9780735410923",

series = "AIP Conference Proceedings",

pages = "448--450",

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

}

TY - GEN

T1 - The role of dust in the early universe

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

AU - Yamasawa, Daisuke

AU - Habe, Asao

AU - Omukai, Kazuyuki

AU - Kozasa, Takashi

AU - Nozawa, Takaya

AU - Hirashita, Hiroyuki

PY - 2012

Y1 - 2012

N2 - We construct a semi-analytical model which includes a novel implementation of dust size evolution and the resulting H2 formation on dust grains in the early universe. We investigate the cosmic star formation rate and the reionization history, taking into acount the initial mass function transition from Pop III to Pop II stars due to dust cooling. We derive the star formation efficiencies for various host dark matter halo masses and discuss effects of the value of critical dust-to-gas mass ratio, script Dcr, on the reionization history. We conclude that the reionization completes before z = 6 in the case of the fiducail value script Dcr=7.4×10 -8.

AB - We construct a semi-analytical model which includes a novel implementation of dust size evolution and the resulting H2 formation on dust grains in the early universe. We investigate the cosmic star formation rate and the reionization history, taking into acount the initial mass function transition from Pop III to Pop II stars due to dust cooling. We derive the star formation efficiencies for various host dark matter halo masses and discuss effects of the value of critical dust-to-gas mass ratio, script Dcr, on the reionization history. We conclude that the reionization completes before z = 6 in the case of the fiducail value script Dcr=7.4×10 -8.

KW - dust, extinction

KW - galaxies: ISM

KW - galaxies: evolution

KW - reionization

UR - http://www.scopus.com/inward/record.url?scp=84875532574&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84875532574&partnerID=8YFLogxK

U2 - 10.1063/1.4754416

DO - 10.1063/1.4754416

M3 - Conference contribution

AN - SCOPUS:84875532574

SN - 9780735410923

T3 - AIP Conference Proceedings

SP - 448

EP - 450

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

Y2 - 21 May 2012 through 25 May 2012

ER -

The role of dust in the early universe: The nature of cosmological reionization sources

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this