Updated measurements of [O III] 88 $\mu$m, [C II] 158 $\mu$m, and Dust Continuum Emission from a z=7.2 Galaxy postprint

Abstract: We present updated measurements of the [O III] 88 $\mu$m, [C II] 158 $\mu$m, and dust continuum emission from a star-forming galaxy at $z=7.212$, SXDF-NB1006-2, by utilizing Atacama Large Millimeter/submillimeter Array (ALMA) archival data sets analysed in previous studies and data sets that have not been analysed before. The follow-up ALMA observations with higher angular resolution and sensitivity reveal a clumpy structure of the [O III] emission on a scale of $0.32-0.85\,\rm{kpc}$. We also combined all the ALMA [O III] ([C II]) data sets and updated the [O III] ([C II]) detection to $5.9\sigma$ ($3.6\sigma-4.5\sigma$). The non-detection of [C II] with data from the REBELS large program implies the incompleteness of spectral-scan surveys using [C II] to detect galaxies with high star formation rates (SFRs) but marginal [C II] emission at high-$z$. The dust continuum at 90 $\mu$m and 160 $\mu$m remains undetected, indicating little dust content of $<3.9\times10^{6}\,M_\odot\,(3\sigma)$, and we obtained a more stringent constraint on the total infrared luminosity. We updated the [O III]/[C II] luminosity ratios to $10.2\pm4.7~(6.1\pm3.5$) and $20\pm12~(9.6\pm6.1$) for $4.5\sigma$ and $3.6\sigma$ [C II] detections, respectively, where the ratios in the parentheses are corrected for the surface brightness dimming effect on the extended [C II] emission. We also found a strong [C II] deficit ($0.6-1.3$ dex) between SXDF-NB1006-2 and the mean $L_{\rm{[CII]}}-\rm{SFR}$ relation of galaxies at $0

• Subject: Astronomy >> Astrophysical processes
• Cite as: ChinaXiv:202303.02283 (or this version ChinaXiv:202303.02283V1)
  DOI:10.12074/202303.02283V1
  CSTR:32003.36.ChinaXiv.202303.02283.V1
• TXID： 16fbedf1-9671-4178-954b-d24e6deaa37e
• Recommended references： Yi W. Ren,Yoshinobu Fudamoto,Akio K. Inoue,Yuma Sugahara,Tsuyoshi Tokuoka,Yoichi Tamura,Hiroshi Matsuo,Kotaro Kohno,Hideki Umehata,Takuya Hashimoto,Rychard J. Bouwens,Renske Smit,Nobunari Kashikawa,Takashi Okamoto,Takatoshi Shibuya,Ikkoh Shimizu.Updated measurements of [O III] 88 $\mu$m, [C II] 158 $\mu$m, and Dust Continuum Emission from a z=7.2 Galaxy.中国科学院科技论文预发布平台.[ChinaXiv:202303.02283V1] (Click&Copy)