论文标题
Lofar两米的天空调查深场：恒星形成率 - 低频的无线电亮度关系
The LOFAR Two-metre Sky Survey Deep fields: The star formation rate - radio luminosity relation at low frequencies
论文作者
论文摘要
在本文中，我们使用150MHz测量值研究了150MHz发光度与恒星形成率（SFR-L150关系）之间的关系，该测量值近红外的118,517 $ z <1 $ galaxies的近红外样品。新的无线电调查数据为研究星系中的恒星形成提供了引人注目的优势，其灵敏度，调查速度和分辨率比上一代调查的提高幅度很大，并且仍然无法灭绝。 The LOFAR Surveys Key Science Project is transforming our understanding of the low-frequency radio sky, with the 150MHz data over the ELAIS-N1 field reaching an RMS sensitivity of 20uJy/beam over 10 deg$^2$ at 6" resolution. All of the galaxies studied have SFR and stellar mass estimates derived from energy balance SED fitting, using redshifts and aperture-matched forced photometry from the LOFAR两米的天空调查（批次）数据释放，通过将深度辅助数据与抗离数的中位数类似的核心数据最小化。依赖于以前的有关此主题的工作，从给定的SFR上较高的质量星系具有较大的150MHz光度，这表明与量热的参数的总体一致性可能是一个巧合，我们可以得出结论，在没有AGN的情况下，可以使用150MHz的观测来衡量准确的序列，以衡量量的sfras to to to to to to $ z = 1 $ 1 $ $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1 $ = 1美元150MHz衍生的SFRS准确至<0.5 DEX。 \ log_ {10}（ψ/m_ \ odot \，\ mathrm {yr}^{ - 1}） +（0.33 \ pm 0.04）\ log_ {10}（m/10^{10} {10} {10} m_ \ odot） + 22.22 \ pm 0.02 $。
In this paper, we investigate the relationship between 150MHz luminosity and star formation rate (the SFR-L150 relation) using 150MHz measurements for a near-infrared selected sample of 118,517 $z<1$ galaxies. New radio survey data offer compelling advantages for studying star formation in galaxies, with huge increases in sensitivity, survey speed and resolution over previous generation surveys, and remaining impervious to extinction. The LOFAR Surveys Key Science Project is transforming our understanding of the low-frequency radio sky, with the 150MHz data over the ELAIS-N1 field reaching an RMS sensitivity of 20uJy/beam over 10 deg$^2$ at 6" resolution. All of the galaxies studied have SFR and stellar mass estimates derived from energy balance SED fitting, using redshifts and aperture-matched forced photometry from the LOFAR Two-metre Sky Survey (LoTSS) deep fields data release. The impact of active galactic nuclei is minimised by leveraging the deep ancillary data alongside outlier-resistant median-likelihood methods. We find a linear and non-evolving SFR-L150 relation, apparently consistent with expectations based on calorimetric arguments, down to the lowest SFRs. However, we also recover compelling evidence for stellar mass dependence in line with previous work on this topic, in the sense that higher mass galaxies have a larger 150MHz luminosity at a given SFR, suggesting that the overall agreement with calorimetric arguments may be a coincidence. We conclude that in the absence of AGN, 150MHz observations can be used to measure accurate galaxy SFRs out to $z=1$ at least, but it is necessary to account for stellar mass in order to obtain 150MHz-derived SFRs accurate to <0.5 dex. Our best-fit relation is $\log_{10} (L_\mathrm{150 MHz} / W\,Hz^{-1}) = (0.90\pm 0.01) \log_{10}(ψ/M_\odot\,\mathrm{yr}^{-1}) + (0.33 \pm 0.04) \log_{10} (M/10^{10}M_\odot) + 22.22 \pm 0.02$. (Abridged)
