IRAS 04000+5052: A Not So Compact, Not So Metal‐poor HiiRegion | Zendy

C. Esteban | Zendy; L. LópezMartín | Zendy; Á. R. López-Sánchez | Zendy; B. Cedrés | Zendy; J. GarcíaRojas | Zendy

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IRAS 04000+5052: A Not So Compact, Not So Metal‐poor HiiRegion

Author(s) -

C. Esteban,

L. LópezMartín,

Á. R. López-Sánchez,

B. Cedrés,

J. GarcíaRojas

Publication year - 2004

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/422894

Subject(s) - physics , astrophysics , nebula , h ii region , emission nebula , orion nebula , ionization , electron density , molecular cloud , astronomy , reflection nebula , stars , electron , ion , star formation , quantum mechanics

We present new observations of IRAS 04000+5052, a Galactic HII regionassociated with a young stellar cluster and possibly located at the Perseusarm. Contrary to previous claims, we have found that this object is not acompact metal-poor HII region. The electron density and chemical composition ofthe nebula are similar to those of normal HII regions of the Galactic disk. Theradial velocity of the ionized gas coincides with that obtained from COobservations, indicating that the nebula is associated with a molecular cloud.Probably, the ionizing source of the HII region is a Herbig Be star of B0.5spectral type.Comment: 15 pages, 2 tables, 5 figures. Accepted for publication in PAS

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