| Authors Affiliation: | 1 Indian Institute of Science Education and Research, Bhauri, Bhopal 462066, Madhya Pradesh, India
2 McMaster University, 1280 Main St W, Hamilton, Ontario L8S 4L8, Canada |
| Abstract : | Understanding the Spectral Energy Distributions (SEDs) of galaxies is paramount in unravelling their evolutionary processes and fundamental physical properties. The SED of a galaxy is a complex interplay of numerous parameters influencing the emitted radiation's energy and magnitude. Additionally, the galactic environment in which a galaxy is formed and resides leaves its indelible signature in the absorption profiles of the SED. However, observational limitations stemming from galactic orientation, modeling assumptions, and data noise can hinder a comprehensive understanding. To overcome these challenges, we present a generalized pipeline that leverages the SKIRT radiative transfer code to construct SEDs of galaxies based on GASOLINE simulation snapshots, with a focus on the NGC 5055 galaxy as a case study.
Our pipeline commences by extracting critical information from the simulation snapshot, encompassing the galaxy's morphological properties, stellar populations, and interstellar medium (ISM) characteristics. This invaluable data serves as the foundation for generating a three-dimensional model of the galaxy within the SKIRT framework. The model intricately accounts for the distribution and properties of stars, gas, and dust, enabling a holistic representation of the galaxy's constituents. The SKIRT code incorporates advanced radiative transfer techniques, facilitating the precise calculation of the radiation field and its interaction with the various components of the galaxy. By considering factors such as dust attenuation, scattering, and emission, our pipeline accurately reproduces the observed SEDs across an extensive spectrum of wavelengths.
To validate the performance of our pipeline, we compare the constructed SEDs of NGC 5055 with observational data available in various spectral bands. Our results demonstrate that the pipeline excels in faithfully reproducing the observed SEDs, adeptly capturing both the broad features and subtle variations in the galaxy's spectrum. These results can be cross-matched to the observations, thereby providing a robust physical explanation of the underlying processes responsible for galactic emissions.
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