Physical conditions in the partially ionized zone of the Orion nebula

Bibcode
1999A&A...342L..37E
Esteban, César; Peimbert, Manuel; Torres-Peimbert, Silvia
Referencia bibliográfica

Astronomy and Astrophysics, v.342, p.L37-L40 (1999)

Fecha de publicación:
2
1999
Revista
Astronomy and Astrophysics
Número de autores
3
Número de autores del IAC
1
Número de citas
18
Número de citas referidas
17
Descripción
We report the first reliable measurement of the nebular [O i] lambda 5577 emission line in the Orion nebula. Diagnostic diagrams based on the [O i] lambda lambda 5577, 6300, and [N i] lambda lambda 3467, 5198, 5200 emission lines indicate that the bulk of the nebular emission in the partially ionized zone of the Orion nebula is produced in regions with low to moderate electron densities (2x10(3) - 4x10(4) cm(-3) ) and with electron temperatures in the 8900 to 12400 K range. This result implies that models based on emission originating in high-density partially ionized zones are not applicable to explain the observed [Fe II] spectrum in the optical region. Based on data obtained at the Observatorio Astronómico Nacional, SPM, B.C., México
Tipo
Con árbitro
Regiones H II

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