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SERENADE. II. An AL...
SERENADE. II. An ALMA Multiband Dust Continuum Analysis of 28 Galaxies at 5
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- Mitsuhashi, Ikki (författare)
- University of Tokyo, Japan,National Astronomical Observatory of Japan,Waseda University
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- Harikane, Yuichi (författare)
- University of Tokyo, Japan
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- Bauer, F. E. (författare)
- Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics,Space Science Institute,Pontificia Universidad Catolica de Chile
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- Bakx, Tom, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ferrara, Andrea (författare)
- Scuola Normale Superiore di Pisa
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- Fujimoto, S. (författare)
- The University of Texas at Austin, USA
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- Hashimoto, Takuya (författare)
- University of Tsukuba
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- Inoue, Akio K. (författare)
- Waseda University
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- Iwasawa, K. (författare)
- Institucio Catalana de Recerca i Estudis Avancats (ICREA),Catalan Institution for Research and Advanced Studies (ICREA),Universitat de Barcelona,University of Barcelona
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- Nishimura, Y. (författare)
- University of Tokyo, Japan
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- Imanishi, M. (författare)
- National Astronomical Observatory of Japan
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- Ono, Yoshiaki (författare)
- University of Tokyo, Japan
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- Saito, T. (författare)
- National Astronomical Observatory of Japan
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- Sugahara, Yuma (författare)
- Waseda University,National Astronomical Observatory of Japan
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- Umehata, H. (författare)
- California Institute of Technology (Caltech),Nagoya University
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- Vallini, L. (författare)
- Istituto nazionale di astrofisica (INAF)
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- Wang, T. (författare)
- Nanjing University
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- Zavala, J. A. (författare)
- National Astronomical Observatory of Japan
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Astrophysical Journal. - 1538-4357 .- 0004-637X. ; 971:2
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.3...
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Abstract
Ämnesord
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- We present an analysis of the Atacama Large Millimeter-submillimeter Array (ALMA) multiband dust continuum observations for 28 spectroscopically confirmed bright Lyman break galaxies at 5 lt; z lt; 8. Our sample consists of 11 galaxies at z ∼ 6 newly observed in our ALMA program, which substantially increases the number of 5 lt; z lt; 8 galaxies with both rest-frame 88 and 158 μm continuum observations, allowing us to simultaneously measure the IR luminosity and dust temperature for a statistical sample of z ≳ 5 galaxies for the first time. We derive the relationship between the ultraviolet (UV) slope (β UV) and infrared excess (IRX) for the z ∼ 6 galaxies, and find a shallower IRX-β UV relation compared to the previous results at z ∼ 2-4. Based on the IRX-β UV relation consistent with our results and the β UV-M UV relation including fainter galaxies in the literature, we find a limited contribution of the dust-obscured star formation to the total star formation rate density, ∼30% at z ∼ 6. Our measurements of the dust temperature at z ∼ 6-7, T dust = 40.9 − 9.1 + 10.0 K on average, support a gentle increase of T dust from z = 0 to z ∼ 6-7. Using an analytic model with parameters consistent with recent James Webb Space Telescope results, we discuss that the observed redshift evolution of the dust temperature can be reproduced by an ∼0.6 dex decrease in the gas depletion timescale and ∼0.4 dex decrease in the metallicity. The variety of T dust observed at high redshifts can also be naturally explained by scatters around the star formation main sequence and average mass-metallicity relation including an extremely high dust temperature of T dust gt; 80 K observed in a galaxy at z = 8.3.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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Mitsuhashi, Ikki
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Harikane, Yuichi
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Bauer, F. E.
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Bakx, Tom, 1990
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Ferrara, Andrea
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Fujimoto, S.
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visa fler...
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Hashimoto, Takuy ...
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Inoue, Akio K.
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Iwasawa, K.
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Nishimura, Y.
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Imanishi, M.
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Ono, Yoshiaki
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Saito, T.
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Sugahara, Yuma
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Umehata, H.
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Vallini, L.
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Wang, T.
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Zavala, J. A.
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