L-band (3.5 mu m) IR-excess in massive star formation I. 30 Doradus

L-band data of 30 Doradus at 3.5 mu m taken with SPIREX (South Pole Infrared Explorer) is presented. The photometry was combined with 2MASS JHK data at 1.25- 2.2 mu m. Colour-colour and colour-magnitude diagrams are constructed and used to determine the sources with infrared excess. These are interp...

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Bibliographic Details
Main Authors: Maercker, M, Burton, Michael
Format: Article in Journal/Newspaper
Language:English
Published: 2006
Subjects:
stars : circumstellar matter
stars : formation
stars : evolution
Hertzsprung Russell ( HR) and C-M diagrams
planetary systems : protoplanetary disks
stars : pre-main sequence
South Pole
South pole
Online Access:http://hdl.handle.net/1959.4/38562
https://unsworks.unsw.edu.au/bitstreams/e0f8688b-c229-4ded-8c62-e7e2241b1a5f/download
Description
Summary:L-band data of 30 Doradus at 3.5 mu m taken with SPIREX (South Pole Infrared Explorer) is presented. The photometry was combined with 2MASS JHK data at 1.25- 2.2 mu m. Colour-colour and colour-magnitude diagrams are constructed and used to determine the sources with infrared excess. These are interpreted as circumstellar disks, and enable the fraction of sources with disks (the cluster disk fraction or CDF) to be determined. We find that similar to 42% of the sources detected at L-band in 30 Doradus have an IR-excess.

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