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On the ionizing source of the Flame Nebula (NGC 2024)

Published online by Cambridge University Press:  26 May 2016

Arjan Bik ,
Annique Lenorzer ,
Lex Kaper ,
Alex de Koter ,
Rens Waters ,
Fernando Comerón  and
Margaret M. Hanson
Arjan Bik
Affiliation:
Sterrenkundig Instituut Anton Pannekoek, Universiteit van Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Nederland
Annique Lenorzer
Affiliation:
Sterrenkundig Instituut Anton Pannekoek, Universiteit van Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Nederland
Lex Kaper
Affiliation:
Sterrenkundig Instituut Anton Pannekoek, Universiteit van Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Nederland
Alex de Koter
Affiliation:
Sterrenkundig Instituut Anton Pannekoek, Universiteit van Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Nederland
Rens Waters
Affiliation:
Sterrenkundig Instituut Anton Pannekoek, Universiteit van Amsterdam, Kruislaan 403, NL-1098 SJ Amsterdam, Nederland
Fernando Comerón
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Straße 2, Garching-bei München, D-85748, B.R.D.
Margaret M. Hanson
Affiliation:
Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA

Abstract

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We have identified IRS 2b as the ionizing source of the Flame Nebula (NGC 2024). For several decades it has been clear that such a hot, massive star must be present in this heavily obscured region, and now it has been found. New J- and K-band photometry and a VLT-isaac K-band spectrum show that IRS 2b is an 08 - 09.7 V star, consistent with published radio continuum and recombination line observations. IRS 2b seems to be slightly evolved from the zero-age main sequence.

Type
Part 3. Location and Distribution of Massive Stars
Information
Symposium - International Astronomical Union , Volume 212: A Massive Star Odyssey: From Main Sequence to Supernova , 2003 , pp. 541 - 542
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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