Chandra Observations of the Eagle Nebula. I. Embedded Young Stellar Objects near the Pillars of Creation

Details Chandra Observations of the Eagle Nebula. I. Embedded Young Stellar Objects near the Pillars of Creation Chandra Observations of the Eagle Nebula. I. Embedded Young Stellar Objects near the Pillars of Creation

2006-10-10

arxiv.org/abs/astro-ph/0610279v1

Astrophys.J.654:347-360,2006

Astronomy and Astrophysics

Astrophysics

35 pages, 7 color figures, accepted by ApJ

Scientific paper

10.1086/508763

We present and analyze the first high-resolution X-ray images ever obtained of the Eagle Nebula star-forming region. On 2001 July 30 the Chandra X-ray Observatory obtained a 78 ks image of the Eagle Nebula (M 16) that includes the core of the young galactic cluster NGC 6611 and the dark columns of dust and cold molecular gas in M 16 known as the Pillars of Creation. We find a total of 1101 X-ray sources in the 17'x17' ACIS-I field of view. Most of the X-ray sources are low mass pre-main-sequence or high-mass main-sequence stars in this young cluster. A handful of hard X-ray sources in the pillars are spatially coincident with deeply embedded young stellar objects seen in high-resolution near-infrared images recently obtained with the VLT (McCaughrean & Andersen 2002). In this paper, we focus on the 40 X-ray sources in and around Pillars 1-4 at the heart of the Eagle Nebula. None of the X-ray sources are associated with the evaporating gaseous globules (EGGs) first observed by Hester et al. (1996) in HST WFPC2 images of M 16, implying that either the EGGs do not contain protostars or that the protostars have not yet become X-ray active. Eight X-ray counts are coincident with the Herbig-Haro object HH216, implying log L_X~30.0.

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