The ALPINE-ALMA [C II] survey: Star-formation-driven outflows and circumgalactic enrichment in the early Universe
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The ALPINE-ALMA [C II] survey : Star-formation-driven outflows and circumgalactic enrichment in the early Universe. / Ginolfi, M.; Jones, G. C.; Béthermin, M.; Fudamoto, Y.; Loiacono, F.; Fujimoto, S.; Le Févre, O.; Faisst, A.; Schaerer, D.; Cassata, P.; Silverman, J. D.; Yan, L.; Capak, P.; Bardelli, S.; Boquien, M.; Carraro, R.; Dessauges-Zavadsky, M.; Giavalisco, M.; Gruppioni, C.; Ibar, E.; Khusanova, Y.; Lemaux, B. C.; Maiolino, R.; Narayanan, D.; Oesch, P.; Pozzi, F.; Rodighiero, G.; Talia, M.; Toft, S.; Vallini, L.; Vergani, D.; Zamorani, G.; Ginolfi, M.
In: Astronomy and Astrophysics, Vol. 633, A90, 2020.Research output: Contribution to journal › Review › Research › peer-review
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TY - JOUR
T1 - The ALPINE-ALMA [C II] survey
T2 - Star-formation-driven outflows and circumgalactic enrichment in the early Universe
AU - Ginolfi, M.
AU - Jones, G. C.
AU - Béthermin, M.
AU - Fudamoto, Y.
AU - Loiacono, F.
AU - Fujimoto, S.
AU - Le Févre, O.
AU - Faisst, A.
AU - Schaerer, D.
AU - Cassata, P.
AU - Silverman, J. D.
AU - Yan, L.
AU - Capak, P.
AU - Bardelli, S.
AU - Boquien, M.
AU - Carraro, R.
AU - Dessauges-Zavadsky, M.
AU - Giavalisco, M.
AU - Gruppioni, C.
AU - Ibar, E.
AU - Khusanova, Y.
AU - Lemaux, B. C.
AU - Maiolino, R.
AU - Narayanan, D.
AU - Oesch, P.
AU - Pozzi, F.
AU - Rodighiero, G.
AU - Talia, M.
AU - Toft, S.
AU - Vallini, L.
AU - Vergani, D.
AU - Zamorani, G.
AU - Ginolfi, M.
N1 - Publisher Copyright: © ESO 2020.
PY - 2020
Y1 - 2020
N2 - We study the efficiency of galactic feedback in the early Universe by stacking the [C II] 158 μm emission in a large sample of normal star-forming galaxies at 4 < z < 6 from the ALMA Large Program to INvestigate [C II] at Early times (ALPINE) survey. Searching for typical signatures of outflows in the high-velocity tails of the stacked [C II] profile, we observe (i) deviations from a single-component Gaussian model in the combined residuals and (ii) broad emission in the stacked [C II] spectrum, with velocities of |v|≲ 500 km s-1. The significance of these features increases when stacking the subset of galaxies with star formation rates (SFRs) higher than the median (SFRmed = 25 M⊙ yr-1), thus confirming their star-formation-driven nature. The estimated mass outflow rates are comparable to the SFRs, yielding mass-loading factors of the order of unity (similarly to local star-forming galaxies), suggesting that star-formation-driven feedback may play a lesser role in quenching galaxies at z > 4. From the stacking analysis of the datacubes, we find that the combined [C II] core emission (|v|< 200 km s-1) of the higher-SFR galaxies is extended on physical sizes of ∼30 kpc (diameter scale), well beyond the analogous [C II] core emission of lower-SFR galaxies and the stacked far-infrared continuum. The detection of such extended metal-enriched gas, likely tracing circumgalactic gas enriched by past outflows, corroborates previous similar studies, confirming that baryon cycle and gas exchanges with the circumgalactic medium are at work in normal star-forming galaxies already at early epochs.
AB - We study the efficiency of galactic feedback in the early Universe by stacking the [C II] 158 μm emission in a large sample of normal star-forming galaxies at 4 < z < 6 from the ALMA Large Program to INvestigate [C II] at Early times (ALPINE) survey. Searching for typical signatures of outflows in the high-velocity tails of the stacked [C II] profile, we observe (i) deviations from a single-component Gaussian model in the combined residuals and (ii) broad emission in the stacked [C II] spectrum, with velocities of |v|≲ 500 km s-1. The significance of these features increases when stacking the subset of galaxies with star formation rates (SFRs) higher than the median (SFRmed = 25 M⊙ yr-1), thus confirming their star-formation-driven nature. The estimated mass outflow rates are comparable to the SFRs, yielding mass-loading factors of the order of unity (similarly to local star-forming galaxies), suggesting that star-formation-driven feedback may play a lesser role in quenching galaxies at z > 4. From the stacking analysis of the datacubes, we find that the combined [C II] core emission (|v|< 200 km s-1) of the higher-SFR galaxies is extended on physical sizes of ∼30 kpc (diameter scale), well beyond the analogous [C II] core emission of lower-SFR galaxies and the stacked far-infrared continuum. The detection of such extended metal-enriched gas, likely tracing circumgalactic gas enriched by past outflows, corroborates previous similar studies, confirming that baryon cycle and gas exchanges with the circumgalactic medium are at work in normal star-forming galaxies already at early epochs.
KW - Galaxies: evolution
KW - Galaxies: formation
KW - Galaxies: high-redshift
KW - Galaxies: ISM
KW - Galaxies: star formation
KW - ISM: jets and outflows
U2 - 10.1051/0004-6361/201936872
DO - 10.1051/0004-6361/201936872
M3 - Review
AN - SCOPUS:85088034662
VL - 633
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A90
ER -
ID: 269507894