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arXiv 2602.22384astro-ph.GA
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3D-Herschel:利用3D-HST星系的泛光谱建模约束尘埃辐射

3D-Herschel: Constraining Dust Emission with Panchromatic Modeling of 3D-HST Galaxies

University of Massachusetts, Amherst(马萨诸塞大学阿默斯特分校);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所);The Pennsylvania State University(宾夕法尼亚州立大学);NSF’s National Optical-Infrared Astronomy Research Laboratory(美国国家光学-红外天文研究实验室);Hiroshima University(广岛大学)
Seamus McNulty, Mimi Song, Katherine E. Whitaker, Joel Leja, Aubrey Medrano, Elijah P. Mathews, Mark Dickinson, Hanae Inami, Ivo Labbe, Danilo Marchesini, Alexa… 展开作者

Seamus McNulty, Mimi Song, Katherine E. Whitaker, Joel Leja, Aubrey Medrano, Elijah P. Mathews, Mark Dickinson, Hanae Inami, Ivo Labbe, Danilo Marchesini, Alexandra Pope, Irene Shivaei

AI总结:

通过结合Herschel远红外数据与CANDELS/3D-HST巡天,使用Prospector-β贝叶斯拟合对41,387个星系建模,发现仅紫外-中红外模型能可靠恢复恒星性质,但刚性红外模板会导致冷尘埃温度和不演化的中红外-红外光度比,表明中红外-红外转换依赖于恒星质量。

摘要:

我们发布了3D-Herschel,这是一个新的公开0.3-350$\mu$m测光星表,结合了去混叠的Herschel远红外成像与CANDELS/3D-HST遗留天区,以探测尘埃遮蔽的宇宙。使用17参数贝叶斯拟合代码Prospector-$\beta$,我们对跨越0.5 $< z <$ 2.5的41,387个星系进行建模,测量恒星和尘埃性质。比较有无远红外约束的拟合,我们发现对于在$\geq2$个Herschel波段有$>3 \sigma$探测的3.2$\\%$星系,仅紫外-中红外模型(0.3-24$\mu$m)能恢复稳健的恒星年龄、恒星形成率和恒星质量(50-70$\\%$在1$\sigma$中值误差内)。因此,Prospector-$\beta$恒星形成序列不受加入远红外数据的影响(在固定恒星质量下,紫外-中红外与紫外-远红外拟合的平均偏差为0.1$\pm$0.07 dex),证实了Leja等人2022年报告的相对于基于紫外+红外估计的偏移对缺乏直接远红外约束是稳健的。然而,在紫外-中红外建模中使用具有固定尘埃发射参数($\gamma$、$U_{\mathrm{min}}$、$q_{\mathrm{PAH}}$)的刚性对数平均红外模板,会导致冷的尘埃温度(在所有红移下比Herschel信息拟合低约7K)和不演化的中红外-红外光度比,在Herschel探测星系的低质量端(log($M_{\star}$) $\sim$ 9.6 $M_{\odot}$),红外-7.7$\mu$m光度比低约0.2 dex。这些结果表明中红外-红外转换依赖于恒星质量,警告在没有远红外数据的情况下使用与$L_{\mathrm{IR}}$无关的模板。对于$z>1.5$且质量$<10^{11} \\ M_{\odot}$的星系,由于源混淆,Herschel最多只能提供上限;下一代远红外望远镜对于遥远星系至关重要。

英文摘要:

We present 3D-Herschel, a new publicly released 0.3-350$μ$m photometric catalog that combines deblended Herschel far-infrared (FIR) imaging with the CANDELS/3D-HST legacy fields to probe the dust-obscured universe. Using the 17-parameter Bayesian fitting code Prospector-$β$, we model 41,387 galaxies spanning 0.5 $< z <$ 2.5 to measure stellar and dust properties. Comparing fits with and without FIR constraints, we find that for the 3.2$\%$ of galaxies with $>3 σ$ detections in $\geq2$ Herschel bands, UV-MIR-only models (0.3-24$μ$m) recover robust stellar ages, SFRs, and stellar masses (50-70$\%$ within the median 1$σ$ error). Consequently, the Prospector-$β$ star-forming sequence is unchanged by the inclusion of FIR data (average deviation 0.1$\pm$0.07 dex between UV-MIR and UV-FIR fits at fixed stellar mass), confirming that the offset relative to UV+IR-based estimates reported by Leja et al. 2022 is robust to the lack of direct FIR constraints. However, the use of rigid log-average IR templates with fixed dust emission parameters ($γ$, $U_{\mathrm{min}}$, $q_{\mathrm{PAH}}$) in UV-MIR modeling yields cold dust temperatures ($\sim$7K colder than Herschel-informed fits at all redshifts) and an unevolving MIR-to-IR luminosity ratio, with $\sim$0.2 dex lower IR-to-7.7$μ$m luminosity ratios at the low-mass end of Herschel-detected galaxies (log($M_{\star}$) $\sim$ 9.6 $M_{\odot}$). These results demonstrate that MIR-to-IR conversions depend on stellar mass, cautioning against $L_{\mathrm{IR}}$-independent templates without FIR data. For galaxies with $<10^{11} \ M_{\odot}$ at $z>1.5$, Herschel can at best provide upper limits due to source confusion; next-generation FIR telescopes will be essential for distant galaxies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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