• 제목/요약/키워드: k-space

검색결과 26,714건 처리시간 0.044초

Globular Cluster System of Sombrero Galaxy

  • Kim, Eun-Hyeuk;Sohn, Sang-Mo Tony;Han, Sang-Il;Kim, Hak-Sub;Lee, Young-Wook
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2009년도 한국우주과학회보 제18권1호
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    • pp.38.1-38.1
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    • 2009

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Discussion of Preliminary Design Review for MIRIS, the Main Payload of STSAT-3

  • Han, Won-Yong;Jin, Ho;Park, Jang-Hyun;Nam, Uk-Won;Yuk, In-Soo;Lee, Sung-Ho;Park, Young-Sik;Park, Sung-Jun;Lee, Dae-Hee;Ree, Chang-H.;Jeong, Woong-Seob;Moon, Bong-Kon;Cha, Sang-Mok;Cho, Seoung-Hyun;Rhee, Seung-Woo;Park, Jong-Oh;Lee, Seung-Heon;Lee, Hyung-Mok;Matsumoto, Toshio
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2008년도 한국우주과학회보 제17권2호
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    • pp.27.1-27.1
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    • 2008

  • KASI (Korea Astronomy and Space Science Institute) is developing a compact wide-field survey space telescope system, MIRIS (The Multi-purpose IR Imaging System) to be launched in 2010 as the main payload of the Korea Science and Technology Satellite 3. Through recent System Design Review (SDR) and Preliminary Design Review (PDR), most of the system design concept was reviewed and confirmed. The near IR imaging system adopted short F/2 optics for wide field low resolution observation at wavelength band 0.9~2.0 um minimizing the effect of attitude control system. The mechanical system is composed of a cover, baffle, optics, and detector system using a $256\times256$ Teledyne PICNIC FPA providing a $3.67\times3.67$ degree field of view with a pixel scale of 51.6 arcsec. We designed a support system to minimize heat transfer with Muti-Layer Insulation. The electronics of the MIRIS system is composed of 7 boards including DSP, control, SCIF. Particular attention is being paid to develop mission operation scenario for space observation to minimize IR background radiation from the Earth and Sun. The scientific purpose of MIRIS is to survey the Galactic plane in the emission line of Pa$\alpha$ ($1.88{\mu}m$) and to detect the cosmic infrared background (CIB) radiation. The CIB is being suspected to be originated from the first generation stars of the Universe and we will test this hypothesis by comparing the fluctuations in I (0.9~1.2 um) and H (1.2~2.0 um) bands to search the red shifted Lyman cutoff signature.

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Onset time analysis of solar proton events

  • Hwang, Jung-A;Cho, Kyung-Suk;Lee, Jae-Jin;Kocharov, Leon;Krucker, Sam;Kim, Yeon-Han;Park, Young-Deuk
    • 천문학회보
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    • 제35권2호
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    • pp.45.2-45.2
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    • 2010

  • We analyzed onset times of the largest six solar proton events during 1997-2006 of solar cycle 23, as observed at 1AU by two satellites of GOES/SEM (Geostationary Operational Environmental Satellites/the Space Environment Monitor) and SOHO/ERNE (Solar and Heliospheric Observatory/the Energetic and Relativistic Nuclei and Electron). We adopted the time shifted method suggested by Leon Kocharov and determined the path length by Sam Krucker's fitting method. We found some problems of those methods and tried to improve those. In this presentation, we will give details of the energy spectra of the 6 SPE events from the ERNE/HED, and onset time comparison among the SPE, flare, type II burst, and CME.

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$H{\alpha}/FUV$ Intensity Ratios in the Galaxy

  • Seon, Kwang-Il;Sankrit, R.;Edelstein, J.;Korpela, E.J.;Min, K.W.;Han, W.;Jin, H.;Park, Y.S.;Ryu, K.S.;Kim, I.J.
    • 한국우주과학회:학술대회논문집(한국우주과학회보)
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    • 한국우주과학회 2008년도 한국우주과학회보 제17권1호
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    • pp.18.3-18.3
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    • 2008

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