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1987•Symposium - International Astronomical UnionOpen access

NGC 2363, A Giant Extragalactic H II Region

M. Peimbert, M. Peña, S. Torres‐Peimbert

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Abstract

NGC 2363 is one of the extragalactic HII regions with the highest surface brightness in Hα and in λ5007. We discuss the physical conditions within this star-forming region. In particular, from spectrophometric studies in the 1200-7400 A range we have determined its chemical abundance. We find that the O/H is an order of magnitude smaller than in the solar vicinity, and that the C/O ratio is a factor of two smaller.

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NGC 2363 is one of the extragalactic HII regions with the highest surface brightness in Hα and in λ5007. We discuss the physical conditions within this star-forming region. In particular, from spectrophometric studies in the 1200-7400 A range we have determined its chemical abundance. We find that the O/H is an order of magnitude smaller than in the solar vicinity, and that the C/O ratio is a factor of two smaller.

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Available abstract

NGC 2363 is one of the extragalactic HII regions with the highest surface brightness in Hα and in λ5007. We discuss the physical conditions within this star-forming region. In particular, from spectrophometric studies in the 1200-7400 A range we have determined its chemical abundance. We find that the O/H is an order of magnitude smaller than in the solar vicinity, and that the C/O ratio is a factor of two smaller.

Key concepts: Astrophysics, Surface brightness, Brightness, Abundance (ecology), Physics, Star (game theory), Astronomy, Galaxy

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