A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). II. 
Physical Properties Derived from the SED Fitting with Optical, Infrared, and 
Radio Data

Toba, Yoshiki; Yamashita, Takuji; Nagao, Tohru; Wang, Wei-Hao; Ueda, Yoshihiro; Ichikawa, Kohei; Kawaguchi, Toshihiro; Akiyama, Masayuki; Hsieh, Bau-Ching; Kajisawa, Masaru; Lee, Chien-Hsiu; Matsuoka, Yoshiki; Noboriguchi, Akatoki; Onoue, Masafusa; Schramm, Malte; Tanaka, Masayuki; Komiyama, Yutaka

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A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). II. Physical Properties Derived from the SED Fitting with Optical, Infrared, and Radio Data

Toba, Y., Yamashita, T., Nagao, T., Wang, W.-H., Ueda, Y., Ichikawa, K., et al. (2019). A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). II. Physical Properties Derived from the SED Fitting with Optical, Infrared, and Radio Data. The Astrophysical Journal Supplement Series, 243.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CF9C-3 Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CF9D-2

Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2019ApJS..243...15T (Any fulltext) Open Access status unknown

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Creators:
Toba, Yoshiki¹, Author
Yamashita, Takuji¹, Author
Nagao, Tohru¹, Author
Wang, Wei-Hao¹, Author
Ueda, Yoshihiro¹, Author
Ichikawa, Kohei¹, Author
Kawaguchi, Toshihiro¹, Author
Akiyama, Masayuki¹, Author
Hsieh, Bau-Ching¹, Author
Kajisawa, Masaru¹, Author
Lee, Chien-Hsiu¹, Author
Matsuoka, Yoshiki¹, Author
Noboriguchi, Akatoki¹, Author
Onoue, Masafusa¹, Author
Schramm, Malte¹, Author
Tanaka, Masayuki¹, Author
Komiyama, Yutaka¹, Author

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1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692

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Free keywords: catalogs infrared: galaxies methods: observational methods: statistical radio continuum: galaxies Astrophysics - Astrophysics of Galaxies

Abstract: We present physical properties of radio galaxies (RGs) with f _{1.4 GHz} > 1 mJy discovered by Subaru Hyper Suprime-Cam (HSC) and Very Large Array Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) survey. For 1056 FIRST RGs at 0 < z ≤ 1.7 with HSC counterparts in about 100 deg², we compiled multi-wavelength data of optical, near-infrared (IR), mid-IR, far-IR, and radio (150 MHz). We derived their color excess (E(B − V)_*), stellar mass, star formation rate (SFR), IR luminosity, the ratio of IR and radio luminosity (q _IR), and radio spectral index (α _radio) that are derived from the spectral energy distribution (SED) fitting with CIGALE. We also estimated Eddington ratio based on stellar mass and integration of the best-fit SEDs of active galactic nucleus (AGN) component. We found that E(B − V)_*, SFR, and IR luminosity clearly depend on redshift while stellar mass, q _IR, and α _radio do not significantly depend on redshift. Since optically faint (i _AB ≥ 21.3) RGs that are newly discovered by our RG survey tend to be high redshift, they tend to not only have a large dust extinction and low stellar mass but also have high SFR and AGN luminosity, high IR luminosity, and high Eddington ratio compared with optically bright ones. The physical properties of a fraction of RGs in our sample seem to differ from a classical view of RGs with massive stellar mass, low SFR, and low Eddington ratio, demonstrating that our RG survey with HSC and FIRST provides us curious RGs among entire RG population.

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Title: The Astrophysical Journal Supplement Series

Source Genre: Journal

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Pages: - Volume / Issue: 243 Sequence Number: - Start / End Page: - Identifier: -