Gas conditions of a star-formation selected sample in the first billion years

Bakx, Tom,1990Chalmers tekniska högskola,Chalmers University of Technology (författare)

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.

Algera, H.National Astronomical Observatory of Japan,Hiroshima University (författare)
Venemans, B.Universiteit Leiden (UL),Leiden University (UL) (författare)
Sommovigo, LauraFlatiron Institute (författare)
Fujimoto, S.The University of Texas at Austin, USA (författare)
Carniani, S.Scuola Normale Superiore di Pisa (författare)
Hagimoto, MasatoNagoya University (författare)
Hashimoto, TakuyaUniversity of Tsukuba (författare)
Inoue, Akio K.Waseda University (författare)
Salak, DraganHokkaido University (författare)
Serjeant, S.Open University (författare)
Vallini, L.Istituto nazionale di astrofisica (INAF) (författare)
Eales, S.Cardiff University (författare)
Ferrara, AndreaScuola Normale Superiore di Pisa (författare)
Fudamoto, YoshinobuChiba University (författare)
Imamura, ChihiroNagoya University (författare)
Inoue, ShigekiHokkaido University (författare)
Knudsen, Kirsten,1976Hokkaido University(Swepub:cth)kraiberg (författare)
Matsuo, HiroshiNational Astronomical Observatory of Japan,The Graduate University for Advanced Studies (SOKENDAI) (författare)
Sugahara, YumaNational Astronomical Observatory of Japan,Waseda University (författare)
Tamura, Y.Nagoya University (författare)
Taniguchi, AkioNagoya University (författare)
Yamanaka, Satoshi (författare)
Chalmers tekniska högskolaNational Astronomical Observatory of Japan (creator_code:org_t)

Ingår i:Monthly Notices of the Royal Astronomical Society532:2, s. 2270-22880035-87111365-2966

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