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Kim, Sang Chul;Moon, Dae-Sik;Lee, Jae-Joon;Pak, Mina
- The Bulletin of The Korean Astronomical Society
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- v.40 no.1
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- pp.56.1-56.1
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- 2015
We are at the initial performance-verification phase of our KMTNet Supernova Project (KSP) using the three wide-field telescopes of the KMTNet in the southern hemisphere. The primary science objectives of KSP, which take advantage of its unique 24-hour continuous sky coverage, are to study early (i.e., within a few hours from explosion) and rare/peculiar (e.g. fast decay) supernovae (SNe), SN progenitors, explosion mechanisms, as well as other exotic optical transients. We present the initial status/results of the program, along with the program strategy, science objectives, target fields, and future plan. While the target field selection will be made based on the performance of the system and consideration of various scientific merits, the initial target fields are focused on nearby galaxies with increased cadence and filter coverage.
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Roh, Soonyoung;Inutsuka, Shu-ichiro;Inoue, Tsuyoshi
- The Bulletin of The Korean Astronomical Society
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- v.40 no.2
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- pp.38.1-38.1
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- 2015
Supernova remnants (SNRs) are one of the most energetic astrophysical events and are thought to be the dominant source of Galactic cosmic rays (CRs). A recent report on observations of gamma rays from the vicinity of SNRs have shown strong evidence that Galactic CR protons are accelerated by the shock waves of the SNRs. The actual gamma-ray emission from pion decay should depend on the diffusion of CRs in the interstellar medium. In order to quantitatively analyze the diffusion of high-energy CRs from acceleration sites, we have performed test particle numerical simulations of CR protons using a three-dimensional magnetohydrodynamics (MHD) simulation of an interstellar medium swept-up by a blast wave. We analyse the CRs diffusion at a length scale of order a few pc, and show the Richtmeyer-Meshkov instability can provide enough turbulence downstream of the shock to make the diffusion coefficient close to the Bohm level for energy larger than 30 TeV for a realistic interstellar medium.
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YAMAOKA HITOSHI;DOI MAMORU;SHiGEYAMA TOSHIKAZU;WATANABE MASARU;YASUDA NAOKI
- Journal of The Korean Astronomical Society
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- v.29 no.spc1
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- pp.213-214
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- 1996
We are promoting a supernova(SN) search project with medium size (60cm-105cm) telescopes belonging to public observatories in Japan. The main purpose is to measure the SNe Ia rate, which plays an important role in the chemical and dynamical evolution of galaxies. We expect to measure the SN rate in E/SO galaxies within the $35\%$ error after 2 years run, and the longer run will give the smaller error.
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