Hubble Space Telescope Nicmos Imaging of W3 Irs 5: a Trapezium in the Making?
نویسندگان
چکیده
We present Hubble Space Telescope NICMOS imaging of W3 IRS 5, a binary high-mass protostar. In addition to the two protostars, NICMOS images taken in the F222M and F160W filters show three new 2.22 μm sources with very red colors; these sources fall within a region 5600 AU in diameter, and are coincident with a ∼ 100 M⊙, dense molecular clump. Two additional point sources are found within 0.4 (800 AU) of one of the high-mass protostars; these may be stellar companions or unresolved emission knots from an outflow. We propose that these sources constitute a nascent Trapezium system in the center of the W3 IRS 5 cluster containing as many as five proto-OB stars. This would be the first identification of a Trapezium still deeply embedded in its natal gas. Subject headings: ISM:individual(W3 IRS 5) —infrared:stars — stars: formation
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