The ALPINE-ALMA [CII] survey: A triple merger at z ∼ 4.56

G. C. Jones; M. Béthermin; Y. Fudamoto; M. Ginolfi; P. Capak; P. Cassata; A. Faisst; O. Le Fèvre; D. Schaerer; J. Silverman; L. Yan; S. Bardelli; M. Boquien; A. Cimatti; M. Dessauges-Zavadsky; M. Giavalisco; C. Gruppioni; E. Ibar; Y. Khusanova; A. M. Koekemoer; B. C. Lemaux; F. Loiacono; R. Maiolino; P. A. Oesch; F. Pozzi; D. Riechers; G. Rodighiero; M. Talia; L. Vallini; D. Vergani; G. Zamorani; E. Zucca

The ALPINE-ALMA [CII] survey: A triple merger at z ∼ 4.56

G. C. Jones, M. Béthermin, Y. Fudamoto, M. Ginolfi, P. Capak, P. Cassata, A. Faisst, O. Le Fèvre, D. Schaerer, J. Silverman, L. Yan, S. Bardelli, M. Boquien, A. Cimatti, M. Dessauges-Zavadsky, M. Giavalisco, C. Gruppioni, E. Ibar, Y. Khusanova, A. M. KoekemoerB. C. Lemaux, F. Loiacono, R. Maiolino, P. A. Oesch, F. Pozzi, D. Riechers, G. Rodighiero, M. Talia, L. Vallini, D. Vergani, G. Zamorani, E. Zucca

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

Abstract

We report the detection of [CII]λ158µm emission from a system of three closely-separated sources in the COSMOS field at z ∼ 4.56, as part of the ALMA Large Program to INvestigate CII at Early times (ALPINE). The two dominant sources are closely associated, both spatially (1.6⁰⁰ ∼ 11 kpc) and in velocity (∼ 100 km s⁻¹), while the third source is slightly more distant (2.8⁰⁰ ∼ 18kpc, ∼ 300 km s⁻¹). The second strongest source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [C II] luminosities, we derive a total log₁₀(SFR_[CII_] [M year⁻¹]) = 2.8 ± 0.2, which may be split into contributions of 59%, 31%, and 10% from the central, east, and west sources, respectively. Comparison of these [C II] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an on-going major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z ∼ 2.5.

Original language	English
Journal	Unknown Journal
Publication status	Published - 2019 Aug 21
Externally published	Yes

Keywords

Galaxies: evolution –
Galaxies: high-redshift
Galaxies: interaction –

ASJC Scopus subject areas

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The ALPINE-ALMA [CII] survey : A triple merger at z ∼ 4.56. / Jones, G. C.; Béthermin, M.; Fudamoto, Y.; Ginolfi, M.; Capak, P.; Cassata, P.; Faisst, A.; Le Fèvre, O.; Schaerer, D.; Silverman, J.; Yan, L.; Bardelli, S.; Boquien, M.; Cimatti, A.; Dessauges-Zavadsky, M.; Giavalisco, M.; Gruppioni, C.; Ibar, E.; Khusanova, Y.; Koekemoer, A. M.; Lemaux, B. C.; Loiacono, F.; Maiolino, R.; Oesch, P. A.; Pozzi, F.; Riechers, D.; Rodighiero, G.; Talia, M.; Vallini, L.; Vergani, D.; Zamorani, G.; Zucca, E.

In: Unknown Journal, 21.08.2019.

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

Jones, GC, Béthermin, M, Fudamoto, Y, Ginolfi, M, Capak, P, Cassata, P, Faisst, A, Le Fèvre, O, Schaerer, D, Silverman, J, Yan, L, Bardelli, S, Boquien, M, Cimatti, A, Dessauges-Zavadsky, M, Giavalisco, M, Gruppioni, C, Ibar, E, Khusanova, Y, Koekemoer, AM, Lemaux, BC, Loiacono, F, Maiolino, R, Oesch, PA, Pozzi, F, Riechers, D, Rodighiero, G, Talia, M, Vallini, L, Vergani, D, Zamorani, G & Zucca, E 2019, 'The ALPINE-ALMA [CII] survey: A triple merger at z ∼ 4.56', Unknown Journal.

Jones, G. C. ; Béthermin, M. ; Fudamoto, Y. ; Ginolfi, M. ; Capak, P. ; Cassata, P. ; Faisst, A. ; Le Fèvre, O. ; Schaerer, D. ; Silverman, J. ; Yan, L. ; Bardelli, S. ; Boquien, M. ; Cimatti, A. ; Dessauges-Zavadsky, M. ; Giavalisco, M. ; Gruppioni, C. ; Ibar, E. ; Khusanova, Y. ; Koekemoer, A. M. ; Lemaux, B. C. ; Loiacono, F. ; Maiolino, R. ; Oesch, P. A. ; Pozzi, F. ; Riechers, D. ; Rodighiero, G. ; Talia, M. ; Vallini, L. ; Vergani, D. ; Zamorani, G. ; Zucca, E. / The ALPINE-ALMA [CII] survey : A triple merger at z ∼ 4.56. In: Unknown Journal. 2019.

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title = "The ALPINE-ALMA [CII] survey: A triple merger at z ∼ 4.56",

abstract = "We report the detection of [CII]λ158µm emission from a system of three closely-separated sources in the COSMOS field at z ∼ 4.56, as part of the ALMA Large Program to INvestigate CII at Early times (ALPINE). The two dominant sources are closely associated, both spatially (1.600 ∼ 11 kpc) and in velocity (∼ 100 km s−1), while the third source is slightly more distant (2.800 ∼ 18kpc, ∼ 300 km s−1). The second strongest source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [C II] luminosities, we derive a total log10(SFR[CII] [M year−1]) = 2.8 ± 0.2, which may be split into contributions of 59%, 31%, and 10% from the central, east, and west sources, respectively. Comparison of these [C II] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an on-going major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z ∼ 2.5.",

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author = "Jones, {G. C.} and M. B{\'e}thermin and Y. Fudamoto and M. Ginolfi and P. Capak and P. Cassata and A. Faisst and {Le F{\`e}vre}, O. and D. Schaerer and J. Silverman and L. Yan and S. Bardelli and M. Boquien and A. Cimatti and M. Dessauges-Zavadsky and M. Giavalisco and C. Gruppioni and E. Ibar and Y. Khusanova and Koekemoer, {A. M.} and Lemaux, {B. C.} and F. Loiacono and R. Maiolino and Oesch, {P. A.} and F. Pozzi and D. Riechers and G. Rodighiero and M. Talia and L. Vallini and D. Vergani and G. Zamorani and E. Zucca",

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T1 - The ALPINE-ALMA [CII] survey

T2 - A triple merger at z ∼ 4.56

AU - Jones, G. C.

AU - Béthermin, M.

AU - Fudamoto, Y.

AU - Ginolfi, M.

AU - Capak, P.

AU - Cassata, P.

AU - Faisst, A.

AU - Le Fèvre, O.

AU - Schaerer, D.

AU - Silverman, J.

AU - Yan, L.

AU - Bardelli, S.

AU - Boquien, M.

AU - Cimatti, A.

AU - Dessauges-Zavadsky, M.

AU - Giavalisco, M.

AU - Gruppioni, C.

AU - Ibar, E.

AU - Khusanova, Y.

AU - Koekemoer, A. M.

AU - Lemaux, B. C.

AU - Loiacono, F.

AU - Maiolino, R.

AU - Oesch, P. A.

AU - Pozzi, F.

AU - Riechers, D.

AU - Rodighiero, G.

AU - Talia, M.

AU - Vallini, L.

AU - Vergani, D.

AU - Zamorani, G.

AU - Zucca, E.

PY - 2019/8/21

Y1 - 2019/8/21

N2 - We report the detection of [CII]λ158µm emission from a system of three closely-separated sources in the COSMOS field at z ∼ 4.56, as part of the ALMA Large Program to INvestigate CII at Early times (ALPINE). The two dominant sources are closely associated, both spatially (1.600 ∼ 11 kpc) and in velocity (∼ 100 km s−1), while the third source is slightly more distant (2.800 ∼ 18kpc, ∼ 300 km s−1). The second strongest source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [C II] luminosities, we derive a total log10(SFR[CII] [M year−1]) = 2.8 ± 0.2, which may be split into contributions of 59%, 31%, and 10% from the central, east, and west sources, respectively. Comparison of these [C II] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an on-going major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z ∼ 2.5.

AB - We report the detection of [CII]λ158µm emission from a system of three closely-separated sources in the COSMOS field at z ∼ 4.56, as part of the ALMA Large Program to INvestigate CII at Early times (ALPINE). The two dominant sources are closely associated, both spatially (1.600 ∼ 11 kpc) and in velocity (∼ 100 km s−1), while the third source is slightly more distant (2.800 ∼ 18kpc, ∼ 300 km s−1). The second strongest source features a slight velocity gradient, while no significant velocity gradient is seen in the other two sources. Using the observed [C II] luminosities, we derive a total log10(SFR[CII] [M year−1]) = 2.8 ± 0.2, which may be split into contributions of 59%, 31%, and 10% from the central, east, and west sources, respectively. Comparison of these [C II] detections to recent zoom-in cosmological simulations suggests an ongoing major merger. We are thus witnessing a system in a major phase of mass build-up by merging, including an on-going major merger and an upcoming minor merger, which is expected to end up in a single massive galaxy by z ∼ 2.5.

KW - Galaxies: evolution –

KW - Galaxies: high-redshift

KW - Galaxies: interaction –

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AN - SCOPUS:85095340376

JO - Nuclear Physics A

JF - Nuclear Physics A

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