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DD 13 - A very young and heavily reddened early O star in the Large Magellanic CloudThis paper investigates the Large Magellanic Cloud star DD 13, which is likely the major ionizing source of the nebula N159A. New optical spectroscopy and new estimates of the broadband photometric properties of DD 13 are obtained. A spectral type of O3-O6 V, E(B-V) = 0.64, and M(V) = -6.93 is found. The spectral type cannot be more precisely defined due to contamination of the spectral data by nebular emission, obliterating the important He I classification lines. These results, plus a published estimate of the Lyman continuum photon injection rate into N159A, suggest that DD 13 actually consists of about 2-4 young, early O stars still enshrouded by their natal dust cloud. The star DD 13 may be a younger example of the type of tight cluster represented by the LMC 'star' Sk-66 deg 41, recently revealed to be composed of six or more components.
Document ID
19910051938
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Conti, Peter S. (Joint Institute for Laboratory Astrophysics Boulder, CO, United States)
Fitzpatrick, Edward L. (Princeton University Observatory, NJ, United States)
Date Acquired
August 15, 2013
Publication Date
May 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 373
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS5-29451
CONTRACT_GRANT: NSF AST-88-06594
Distribution Limits
Public
Copyright
Other