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The Spectral Energy Distributions of Galaxies

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arxiv 2502.17680 v1 pith:YDX3PJ2J submitted 2025-02-24 astro-ph.GA

Kartheik G. Iyer , Camilla Pacifici , Gabriela Calistro-Rivera , Christopher C. Lovell This is my paper
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keywords galaxiesgalaxydistributionenergyevolutionarygalacticsedsspectral
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The spectral energy distribution (SED) of a galaxy represents the distribution of electromagnetic radiation emitted across all wavelengths, from radio waves to gamma rays. The galaxy SED is akin to its fingerprint, and serves as a fundamental tool in modern astrophysics. It enables researchers to determine crucial properties of galaxies, including their star-formation rates, stellar populations, dust content, and evolutionary state. By analyzing galactic SEDs, astronomers can reconstruct the physical processes occurring within galaxies and trace their evolutionary histories. This article explores our current understanding of the components that contribute to galactic SEDs, the observational techniques used to measure them, and their applications in understanding galaxy formation and evolution.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Spectral Microlensing of Extragalactic H II Regions by Stellar-Mass Black Holes

    astro-ph.GA 2026-08 conditional novelty 6.0 of 10

    Microlensing of compact extragalactic H II regions by Milky Way black holes could produce detectable line excesses, but the expected event rate is only about 10^-6 per year.

  2. Investigating the star formation histories of galaxies from Cosmic Dawn to the Epoch of Reionization with the Santa Cruz SAM

    astro-ph.GA 2026-07 conditional novelty 6.0 of 10

    Ultra-high-z galaxies have median t50 ≲ 30 Myr and t90 ≲ 70 Myr—3–4× shorter than at z~6—with rising median SFHs but diverse individual histories, requiring refined young-star SED mapping for accurate UV luminosities.

  3. pop-cosmos: Disentangling galaxy properties from observables using data-driven approaches

    astro-ph.GA 2026-06 unverdicted novelty 6.0 of 10

    Rest-frame optical galaxy SEDs from a 16-parameter SPS model are captured by five disentangled VAE latents (mass, young stars, dust, soft/hard ionization); metallicity and age are not independent drivers.

  4. Explaining ultra-massive quiescent galaxies at $3 < z < 5$ in the context of their environments

    astro-ph.GA 2025-07 conditional novelty 6.0 of 10

    Conditioning extreme-value statistics on observed overdensities reduces the apparent tension for ultra-massive quiescent galaxies at 3<z<5 from about 5.7σ to 1.7-3.2σ.

  5. CANUCS/Technicolor Data Release 1: Imaging, Photometry, Slit Spectroscopy, and Stellar Population Parameters

    astro-ph.GA 2025-06 conditional novelty 5.0 of 10

    The CANUCS/Technicolor Data Release 1 provides public JWST imaging, photometric catalogs, spectra, and stellar population fits for about 100,000 galaxies in five lensing clusters.

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