Research Project
Grant-in-Aid for Scientific Research (C)
We investigate the origin of cosmic solid particles (dust grains) in the early unvierse. We find that very massive first stars could be the first sources of dust grains in the universe. We also show that large amounts of dust grains and flat extinction curves in high-redshift galaxies can be explained self-consistently by the state-of-the-art dust evolution model.We study on the extinction of Type Ia supernovae, showing that the unusual extinction curves observed for Type Ia supernovae are predominantly caused by interstellar dust. We also demonstrate that typical sizes of the interstellar dust are a few times smaller than that in our Galaxy.On the other hand, we constrain the physical condition of supernova ejecta from the measured sizes of presolar grains which are discovered in meteorites. We also derive the sizes of presolar grains that can survive the destruction in the interstellar medium and the thermal diffusion of isotopes in parent bodies of meteorites.
All 2018 2017 2016 2015 2014 Other
All Int'l Joint Research (4 results) Journal Article (20 results) (of which Int'l Joint Research: 5 results, Peer Reviewed: 18 results, Open Access: 20 results, Acknowledgement Compliant: 12 results) Presentation (25 results) (of which Int'l Joint Research: 9 results, Invited: 7 results) Remarks (4 results) Funded Workshop (1 results)
Monthly Notices of the Royal Astronomical Society: Letters
Volume: 472 Issue: 1 Pages: L115-L119
10.1093/mnrasl/slx163
Planetary and Space Science (special issue for Cosmic Dust IX)
Volume: 149 Pages: 45-55
10.1016/j.pss.2017.01.009
Memorie della Societa Astronomica Italiana
Volume: 88 Pages: 447-450
Cambridge University Press 329 “IAU Symposium 329, The Lives and Death-Throes of Massive Stars”
Volume: 329 Issue: S329 Pages: 431-431
10.1017/s1743921317001582
Science Advances
Volume: 3 Issue: 1
10.1126/sciadv.1601992
The Astrophysical Journal
Volume: 836 Issue: 1 Pages: 106-106
10.3847/1538-4357/aa5b8c
Volume: 823 Issue: 2 Pages: 104-104
10.3847/0004-637x/823/2/104
Planetary and Space Science
Volume: 133 Pages: 17-22
10.1016/j.pss.2016.02.006
Volume: 133 Pages: 36-46
10.1016/j.pss.2016.08.006
Volume: 817 Issue: 2 Pages: 145-167
10.3847/0004-637x/817/2/145
The Astrophysical Journal Letters
Volume: 811 Issue: 2 Pages: L39-L39
10.1088/2041-8205/811/2/l39
Monthly Notices of the Royal Astronomical Society
Volume: 452 Issue: 4 Pages: 3281-3292
10.1093/mnras/stv1498
120005674622
Volume: 454 Issue: 2 Pages: 1620-1633
10.1093/mnras/stv2095
Volume: 446 Issue: 3 Pages: 2659-2672
10.1093/mnras/stu2298
Volume: 447 Issue: 1 Pages: L16-L20
10.1093/mnrasl/slu175
Volume: 787 Issue: 2 Pages: L17-L17
10.1088/2041-8205/787/2/l17
Volume: 789 Issue: 1 Pages: L6-L6
10.1088/2041-8205/789/1/l6
Volume: 100 Pages: 40-45
10.1016/j.pss.2014.01.013
Volume: 793 Issue: 2 Pages: L22-L22
10.1088/2041-8205/793/2/l22
Volume: 794 Issue: 2 Pages: 100-100
10.1088/0004-637x/794/2/100
http://th.nao.ac.jp/
http://th.nao.ac.jp/MEMBER/nozawa/index.html