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Issue A&A
Volume 438, Number 2, August I 2005
Page(s) L21 - L24
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:200500141



A&A 438, L21-L24 (2005)
DOI: 10.1051/0004-6361:200500141

Letter

On the origin of the X-ray emission towards the early Herbig Be star MWC 297

Jorick S. Vink1, P. M. O'Neill1, S. G. Els2 and J. E. Drew1

1  Imperial College London, Blackett Laboratory, Prince Consort Road, London, SW7 2AZ, UK
    e-mail: jsv@astro.keele.ac.uk
2  California Institute of Technology, Mail Code 102-8, 1200 E. California Blvd., Pasadena CA 91125, USA

(Received 9 May 2005 / Accepted 12 June 2005 )

Abstract
We present high resolution ($\simeq$0.2) AO-corrected coronographic near-infrared imaging on the early-type Herbig Be star MWC 297. X-ray flaring has been reported towards this young object, however this has been difficult to reconcile with its early spectral type (B1.5) and relatively high mass (~10 $M_{\odot}$). Our infrared and X-ray analysis shows that the X-ray flaring is likely due to a late-type star in the same field. The case of MWC 297 emphasizes the need for coronographic imaging to address the reality of X-ray emission towards Herbig Ae/Be stars, which is needed to understand the differences between low and high-mass star formation.


Key words: stars: formation -- stars: pre-main sequence -- stars: flare -- stars: individual: M 297 -- X-rays: stars

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© ESO 2005

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