传统上,尽管星系的远紫外(FUV)到远红外(FIR)和射电光谱能量分布(SED)受相同物理过程塑造,但它们通常被分开考虑。在本研究中,我们探索了使用ProSpect SED拟合代码的扩展版本同时拟合FUV-射电SED的实用性,该版本考虑了自由-自由发射和同步辐射发射的贡献。我们使用了来自Deep Extragalactic VIsible Legacy Survey (DEVILS)和Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel (KINGFISH)的一小部分星系样本,这些星系具有高质量且稳健的FUV-射电数据,为测试ProSpect的射电扩展提供了理想样本。由于射电扩展的参数化将射电连续谱与FIR发射联系起来,我们探索了使用射电连续谱测量作为尘埃衰减与发射之间能量平衡约束的益处。我们发现,在缺乏中红外至远红外(MIR-FIR)测光数据的情况下,包含1.4 GHz连续谱测量可以提高恢复的星系恒星形成率和尘埃光度的准确性,分别将中位不确定性降低了0.1和0.2 dex。我们还证明,纳入3和10 GHz测量可以进一步约束能量平衡,从而约束恒星形成率和尘埃光度。这表明将FUV-FIR SED拟合技术扩展到射电频率的优势,特别是随着我们进入FIR调查仍然有限而射电数据变得丰富的时代(即SKA及其先驱项目)。
英文摘要:
Traditionally, the far ultraviolet (FUV) to far-infrared (FIR) and radio spectral energy distributions (SEDs) of galaxies have been considered separately despite the common physical process shaping them. In this work, we explore the utility of simultaneously fitting FUV-radio SEDs using an extended version of the ProSpect SED fitting code considering contributions from both free-free and synchrotron emission. We use a small sample of galaxies from the Deep Extragalactic VIsible Legacy Survey (DEVILS) and the Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel (KINGFISH) where high-quality and robust FUV-radio data are available to provide an ideal sample for testing a radio extension of ProSpect. As the parameterisation of the radio extension links the radio continuum to the FIR emission, we explore the benefit of using radio continuum measurements as a constraint on the energy balance between dust attenuation and emission. We find that for situations where MIR-FIR photometry is unavailable, including a 1.4 GHz continuum measurement allows for improved accuracy in recovered star formation rates and dust luminosities of galaxies reducing the median uncertainty by 0.1 and 0.2 dex respectively. We also demonstrate that incorporating 3 and 10 GHz measurements allows for further constraint on the energy balance and therefore the star formation rate and dust luminosity. This demonstrates the advantage of extending FUV-FIR SED fitting techniques to radio frequencies, especially as we move into an era where FIR surveys will remain limited and radio data become abundant (i.e. with the SKA and precursors).
The Local Ultraviolet to Infrared Treasury II. Refining Star Formation Histories of Ten Metal-Poor Dwarf Galaxies with Simultaneous UV-Optical Two-CMD Fitting
RCSED - A Value-Added Reference Catalog of Spectral Energy Distributions of 800,299 Galaxies in 11 Ultraviolet, Optical, and Near-Infrared Bands: Morphologies, Colors, Ionized Gas and Stellar Populations Properties
Investigating Nearby Star-Forming Galaxies in the Ultraviolet with HST/COS Spectroscopy. I: Spectral Analysis and Interstellar Abundance Determinations
Interstellar Silicon Depletion and the Ultraviolet Extinction
Spinning small silicate grains were recently invoked to account for the Galactic foreground anomalous microwave emission. These grains, if present, will absorb starlight in the far ultraviolet (UV). There is also renewed interest in attributing the enigmatic 2175 Angstrom interstellar extinction bump to small silicates. To probe the role of silicon in the UV extinction, we explore the relations between the amount of silicon required to be locked up in silicates [Si/H]_{dust} and the 2175 Angstrom bump or the far-UV extinction rise, based on an analysis of the extinction curves along 46 Galacti…
Deep Extragalactic VIsible Legacy Survey (DEVILS): Identification of AGN through SED Fitting and the Evolution of the Bolometric AGN Luminosity Function
Radio-only and Radio-to-far-ultraviolet Spectral Energy Distribution Modeling of 14 ULIRGs: Insights into the Global Properties of Infrared Bright Galaxies
The Spitzer Data Fusion - A Far-Ultraviolet to Far-Infrared Multi-Wavelength Database in Spitzer Extragalactic Survey Fields
Inter-University Institute for Data Intensive Astronomy (IDIA), Department of Astronomy, University of Cape Town(开普敦大学数据密集型天文学校际研究所);University of the Western Cape(西开普大学);INAF - Istituto di Radioastronomia(意大利国家天体物理研究所射电天文台)
Far-Ultraviolet diffuse emission as a tracer of Galactic extinction at the North Galactic Pole
Tezpur University(特佐普尔大学);Manipal Academy of Higher Education(马尼帕尔高等教育学院);Indian Institute of Astrophysics(印度天体物理研究所);Institute of Astronomy, 48 Pyatnitskaya St., Moscow 119017, Russia(俄罗斯莫斯科彼特尼茨卡亚街48号天文研究所)
Towards a consistent framework of determining active galactic nucleus contribution fraction and host galaxy properties
Kapteyn Astronomical Institute, University of Groningen(格罗宁根大学卡普坦天文研究所);SRON Netherlands Institute for Space Research(荷兰空间研究研究所);National Centre for Nuclear Research(国家核研究中心);Aix-Marseille Université, CNRS, CNES, LAM(艾克斯-马赛大学);INAF - Osservatorio Astronomico di Capodimonte(意大利国家天体物理研究所卡波迪蒙特天文台);European Space Agency/ESTEC(欧洲空间局/欧洲空间研究与技术中心)
Stellar lifetime and ultraviolet properties of the old metal-rich Galactic open cluster NGC6791: a pathway to understand the UV upturn of elliptical galaxies