ALMA detection of the [OIII] 88 μm line in a highly-magnified Lyman break galaxy at z = 6.1

Kaho Sunaga; Yoichi Tamura; Minju Lee; Ken Mawatari; Akio K. Inoue; Takuya Hashimoto; Hiroshi Matsuo; Akio Taniguchi

doi:10.1017/S174392131900245X

ALMA detection of the [OIII] 88 μm line in a highly-magnified Lyman break galaxy at z = 6.1

Kaho Sunaga^*, Yoichi Tamura, Minju Lee, Ken Mawatari, Akio K. Inoue, Takuya Hashimoto, Hiroshi Matsuo, Akio Taniguchi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We present a 4.7σ detection of the [OIII] 88 μm line in a gravitationally-lensed Lyman break galaxy, RXC J2248-ID3, using the Atacama Large Millimeter/submillimeter Array (ALMA). We did not detect [CII] 158 μm and rest-frame 90 μm dust continuum emission, suggesting that the bulk of the interstellar medium (ISM) is ionized. Our two-component SED model combining the previous Hubble Space Telescope (HST) data and new photometry obtained from Very Large Telescope (VLT), Spitzer and ALMA suggests the presence of young (∼2 Myr) and mature (∼600 Myr) stellar components with the metallicity of Z = 0.2Z . Our findings are in contrast with previous results claiming a very young, metal-poor stellar component.

Original language	English
Pages (from-to)	309-311
Number of pages	3
Journal	Proceedings of the International Astronomical Union
Volume	15
Issue number	S341
DOIs	https://doi.org/10.1017/S174392131900245X
Publication status	Published - 2019
Externally published	Yes

Keywords

galaxies: high-redshift

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1017/S174392131900245X

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@article{b8926048a3ca466b86ee5e7f008a0f55,

title = "ALMA detection of the [OIII] 88 μm line in a highly-magnified Lyman break galaxy at z = 6.1",

abstract = "We present a 4.7σ detection of the [OIII] 88 μm line in a gravitationally-lensed Lyman break galaxy, RXC J2248-ID3, using the Atacama Large Millimeter/submillimeter Array (ALMA). We did not detect [CII] 158 μm and rest-frame 90 μm dust continuum emission, suggesting that the bulk of the interstellar medium (ISM) is ionized. Our two-component SED model combining the previous Hubble Space Telescope (HST) data and new photometry obtained from Very Large Telescope (VLT), Spitzer and ALMA suggests the presence of young (∼2 Myr) and mature (∼600 Myr) stellar components with the metallicity of Z = 0.2Z . Our findings are in contrast with previous results claiming a very young, metal-poor stellar component.",

keywords = "galaxies: high-redshift",

author = "Kaho Sunaga and Yoichi Tamura and Minju Lee and Ken Mawatari and Inoue, {Akio K.} and Takuya Hashimoto and Hiroshi Matsuo and Akio Taniguchi",

note = "Publisher Copyright: {\textcopyright} International Astronomical Union 2020.",

year = "2019",

doi = "10.1017/S174392131900245X",

language = "English",

volume = "15",

pages = "309--311",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

number = "S341",

}

TY - JOUR

T1 - ALMA detection of the [OIII] 88 μm line in a highly-magnified Lyman break galaxy at z = 6.1

AU - Sunaga, Kaho

AU - Tamura, Yoichi

AU - Lee, Minju

AU - Mawatari, Ken

AU - Inoue, Akio K.

AU - Hashimoto, Takuya

AU - Matsuo, Hiroshi

AU - Taniguchi, Akio

PY - 2019

Y1 - 2019

N2 - We present a 4.7σ detection of the [OIII] 88 μm line in a gravitationally-lensed Lyman break galaxy, RXC J2248-ID3, using the Atacama Large Millimeter/submillimeter Array (ALMA). We did not detect [CII] 158 μm and rest-frame 90 μm dust continuum emission, suggesting that the bulk of the interstellar medium (ISM) is ionized. Our two-component SED model combining the previous Hubble Space Telescope (HST) data and new photometry obtained from Very Large Telescope (VLT), Spitzer and ALMA suggests the presence of young (∼2 Myr) and mature (∼600 Myr) stellar components with the metallicity of Z = 0.2Z . Our findings are in contrast with previous results claiming a very young, metal-poor stellar component.

AB - We present a 4.7σ detection of the [OIII] 88 μm line in a gravitationally-lensed Lyman break galaxy, RXC J2248-ID3, using the Atacama Large Millimeter/submillimeter Array (ALMA). We did not detect [CII] 158 μm and rest-frame 90 μm dust continuum emission, suggesting that the bulk of the interstellar medium (ISM) is ionized. Our two-component SED model combining the previous Hubble Space Telescope (HST) data and new photometry obtained from Very Large Telescope (VLT), Spitzer and ALMA suggests the presence of young (∼2 Myr) and mature (∼600 Myr) stellar components with the metallicity of Z = 0.2Z . Our findings are in contrast with previous results claiming a very young, metal-poor stellar component.

KW - galaxies: high-redshift

UR - http://www.scopus.com/inward/record.url?scp=85106787533&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85106787533&partnerID=8YFLogxK

U2 - 10.1017/S174392131900245X

DO - 10.1017/S174392131900245X

M3 - Article

AN - SCOPUS:85106787533

SN - 1743-9213

VL - 15

SP - 309

EP - 311

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S341

ER -

ALMA detection of the [OIII] 88 μm line in a highly-magnified Lyman break galaxy at z = 6.1

Abstract

Keywords

ASJC Scopus subject areas

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