Correlations between IR Luminosity, Star Formation Rate, and CO Luminosity in the Local Universe

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-07-08 DOI:10.3390/galaxies12040037

M. Bonato, I. Baronchelli, Viviana Casasola, G. De Zotti, Leonardo Trobbiani, E. Ruli, Vidhi Tailor, Simone Bianchi

引用次数: 0

Abstract

We exploit the DustPedia sample of galaxies within approximately 40 Mpc, selecting 388 sources, to investigate the correlations between IR luminosity (LIR), the star formation rate (SFR), and the CO(1-0) luminosity (LCO) down to much lower luminosities than reached by previous analyses. We find a sub-linear dependence of the SFR on LIR. Below log(LIR/L⊙)≃10 or SFR≃1M⊙yr−1, the SFR/LIR ratio substantially exceeds the standard ratio for dust-enshrouded star formation, and the difference increases with decreasing LIR values. This implies that the effect of unobscured star formation overcomes that of dust heating by old stars, at variance with results based on the Planck ERCSC galaxy sample. We also find that the relations between the LCO and LIR or the SFR are consistent with those obtained at much higher luminosities.

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局域宇宙中红外发光度、恒星形成率和 CO 发光度之间的相关性

我们利用 DustPedia 中大约 40 Mpc 范围内的星系样本，选取了 388 个光源，研究了红外光度（LIR）、恒星形成率（SFR）和 CO（1-0）光度（LCO）之间的相关性，研究结果比以前的分析结果要低得多。我们发现恒星形成率与 LIR 呈亚线性关系。在log(LIR/L⊙)≃10或SFR≃1M⊙yr-1以下，SFR/LIR比值大大超过了尘埃笼罩恒星形成的标准比值，而且这种差异随着LIR值的降低而增大。这意味着未被遮挡恒星形成的影响超过了老恒星尘埃加热的影响，这与基于普朗克ERCSC星系样本的结果不同。我们还发现，LCO 与 LIR 或 SFR 之间的关系与在更高光度下得到的结果是一致的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico