TY - JOUR
T1 - Gas conditions of a star-formation selected sample in the first billion years
AU - Bakx, Tom J.L.C.
AU - Algera, Hiddo S.B.
AU - Venemans, Bram
AU - Sommovigo, Laura
AU - Fujimoto, Seiji
AU - Carniani, Stefano
AU - Hagimoto, Masato
AU - Hashimoto, Takuya
AU - Inoue, Akio K.
AU - Salak, Dragan
AU - Serjeant, Stephen
AU - Vallini, Livia
AU - Eales, Stephen
AU - Ferrara, Andrea
AU - Fudamoto, Yoshinobu
AU - Imamura, Chihiro
AU - Inoue, Shigeki
AU - Knudsen, Kirsten K.
AU - Matsuo, Hiroshi
AU - Sugahara, Yuma
AU - Tamura, Yoichi
AU - Taniguchi, Akio
AU - Yamanaka, Satoshi
N1 - Publisher Copyright:
© 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2024/8/1
Y1 - 2024/8/1
N2 - We present Atacama Large Millimetre/submillimetre Array (ALMA) observations of the [O iii] 88 emission of a sample of thirteen galaxies at to 7.6 selected as [C ii]-emitting companion sources of quasars. To disentangle the origins of the luminous Oxygen line in the Universe, we looked at emission-line galaxies that are selected through an excellent star-formation tracer [C ii] with star-formation rates between 9 and 162. Direct observations reveal [O iii] emission in just a single galaxy (), and a stacked image shows no [O iii] detection, providing deep upper limits on the ratios in the Universe (at). While the fidelity of this sample is high, no obvious optical/near-infrared counterpart is seen in the JWST imaging available for four galaxies. Additionally accounting for low-z CO emitters, line stacking shows that our sample-wide result remains robust: The enhanced reported in the first billion years of the Universe is likely due to the selection towards bright, blue Lyman-break galaxies with high surface star-formation rates or young stellar populations. The deep upper limit on the rest-frame 90 μm continuum emission (Jy at), implies a low average dust temperature (K) and high-dust mass (). As more normal galaxies are explored in the early Universe, synergy between JWST and ALMA is fundamental to further investigate the ISM properties of the a broad range of samples of high-z galaxies.
AB - We present Atacama Large Millimetre/submillimetre Array (ALMA) observations of the [O iii] 88 emission of a sample of thirteen galaxies at to 7.6 selected as [C ii]-emitting companion sources of quasars. To disentangle the origins of the luminous Oxygen line in the Universe, we looked at emission-line galaxies that are selected through an excellent star-formation tracer [C ii] with star-formation rates between 9 and 162. Direct observations reveal [O iii] emission in just a single galaxy (), and a stacked image shows no [O iii] detection, providing deep upper limits on the ratios in the Universe (at). While the fidelity of this sample is high, no obvious optical/near-infrared counterpart is seen in the JWST imaging available for four galaxies. Additionally accounting for low-z CO emitters, line stacking shows that our sample-wide result remains robust: The enhanced reported in the first billion years of the Universe is likely due to the selection towards bright, blue Lyman-break galaxies with high surface star-formation rates or young stellar populations. The deep upper limit on the rest-frame 90 μm continuum emission (Jy at), implies a low average dust temperature (K) and high-dust mass (). As more normal galaxies are explored in the early Universe, synergy between JWST and ALMA is fundamental to further investigate the ISM properties of the a broad range of samples of high-z galaxies.
KW - galaxies: ISM
KW - galaxies: high-redshift
KW - galaxies: star formation
UR - http://www.scopus.com/inward/record.url?scp=85198715716&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85198715716&partnerID=8YFLogxK
U2 - 10.1093/mnras/stae1613
DO - 10.1093/mnras/stae1613
M3 - Article
AN - SCOPUS:85198715716
SN - 0035-8711
VL - 532
SP - 2270
EP - 2288
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -