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a problem for the analysis in the previous section, but also for
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One of the main conclusions from Tamura et al. (2019) is
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the effects of a decrease in dust temperature on the older stellar
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1 Division of Particle and Astrophysical Science, Graduate School of Science,
Nagoya University, Aichi 464-8602, Japan
Astronomical Observatory of Japan, 2-21-1, Osawa, Mitaka,
Tokyo 181-8588, Japan
3 Tomonaga Center for the History of the Universe (TCHoU), Faculty of Pure
and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571,
Japan
4 Department of Environmental Science and Technology, Faculty of Design
Technology, Osaka Sangyo University, 3-1-1, Nakagaito, Daito, Osaka 5748530, Japan
5 Department of Physics, School of Advanced Science and Engineering,
Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo,
Shinjuku, Tokyo 169-8555, Japan
6 Waseda Research Institute for Science and Engineering, Faculty of Science
and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 1698555, Japan
7 Max-Planck-Institut f¨
ur Extraterrestrische Physik (MPE), Giessenbachstr.,
D-85748 Garching, Germany
8 Institute for Cosmic Ray Research, The University of Tokyo, Kashiwa,
Chiba 277-8582, Japan
9 Kyoto University Research Administration Office, Yoshida-Honmachi,
Sakyo-ku, Kyoto 606-8501, Japan
10 The Open University of Japan, 2-11 Wakaba, Mihama-ku, Chiba 2618586, Japan
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11 RIKEN
16 Faculty
of Science, Hokkaido University, N10 W8 Kita-ku, Sapporo 0600810 Japan
17 Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido 0908507, Japan
18 Department of Physics, Graduate School of Science, The University of
Tokyo, Tokyo 113-0033, Japan
19 Kavli Institute for the Physics and Mathematics of the Universe (WPI),
Todai Institutes for Advanced Study, The University of Tokyo, Kashiwa,
Chiba 277-8583, Japan
This paper has been typeset from a TEX/LATEX file prepared by the author.
MNRAS 493, 4294–4307 (2020)
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Cluster for Pioneering Research, 2-1 Hirosawa, Wako-shi,
Saitama 351-0198, Japan
12 Institute of Astronomy, Graduate School of Science, The University of
Tokyo, 2-21-1, Osawa, Mitaka, Tokyo 181-0015, Japan
13 Observational Astrophysics, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
14 Research Center for the Early Universe, Graduate School of Science, The
University of Tokyo, Tokyo 113-0033, Japan
15 Department of Astronomical Science, The Graduate University for Advanced Studies (SOKENDAI), 2-21-1, Osawa, Mitaka, Tokyo 181-8588,
Japan
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