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- Title
ALMA detection of the [OIII] 88 μ m line in a highly-magnified Lyman break galaxy at z = 6.1.
- Authors
Sunaga, Kaho; Tamura, Yoichi; Lee, Minju; Mawatari, Ken; Inoue, Akio K.; Hashimoto, Takuya; Matsuo, Hiroshi; Taniguchi, Akio; Boquien, Médéric; Lusso, Elisabeta; Gruppioni, Carlotta; Tissera, Patricia
- 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.
- Publication
Proceedings of the International Astronomical Union, 2019, Vol 15, Issue S341, p309
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S174392131900245X