We explore the diagnostic diagram that uses the ratio of emission lines ([NII]lambda 6584 angstrom/H alpha) versus equivalent width of [NII]lambda 6584 angstrom, proposed by Coziol et al. (1998) to a sample obtained from Sloan Digital Sky Survey Data Release 5 to separate star-forming and active galaxies from low-luminosity AGNs. This diagnostic diagram does not need the classical emission lines like [OIII]lambda 5007 angstrom, or H beta to classify activity type. We show empirically that this combination of emission lines can be used to search the called Low-Luminosity AGN.
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Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South KoreaSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Karouzos, Marios
Woo, Jong-Hak
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Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South KoreaSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Woo, Jong-Hak
Matsuoka, Kenta
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Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, JapanSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Matsuoka, Kenta
Kochanek, Christopher S.
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Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USASeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Kochanek, Christopher S.
Onken, Christopher A.
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Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, AustraliaSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Onken, Christopher A.
Kollmeier, Juna A.
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Carnegie Observ, Pasadena, CA 91101 USASeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Kollmeier, Juna A.
Park, Dawoo
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Seoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South KoreaSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Park, Dawoo
Nagao, Tohru
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Ehime Univ, Res Ctr Space & Cosm Evolut, Matsuyama, Ehime 7908577, JapanSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea
Nagao, Tohru
Kim, Sang Chul
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Korea Astron & Space Sci Inst KASI, Daejeon 305348, South Korea
Korea Univ Sci & Technol UST, Daejeon 305350, South KoreaSeoul Natl Univ, Dept Phys & Astron, Astron Program, Seoul, South Korea