SETI public: The Masses of the Orion Proplyds from Submillimeter Dust Emission

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From: LARRY KLAES (ljk4_at_msn.com)
Date: Tue Jun 14 2005 - 09:52:13 PDT

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    Paper: astro-ph/0506225
    Date: Fri, 10 Jun 2005 03:45:17 GMT (402kb)

    Title: The Masses of the Orion Proplyds from Submillimeter Dust Emission

    Authors: Jonathan P. Williams (IfA), Sean M. Andrews (IfA), and David J.
    Wilner
    (CfA)
    Comments: 14 pages, submitted to ApJ
    \\
    We have imaged the 880 micron continuum emission from the "proplyds" in the
    center of the Trapezium Cluster in Orion using the Submillimeter Array with
    a
    beam size 1.5'' FWHM and an rms of 2.7 mJy. Five sources are detected with
    fluxes in the range 18 to 38 mJy, which includes dust emission from four
    proplyds and ionized gas from theta1 Ori G. The total masses of the detected
    proplyds derived from their dust emission range from 0.013 to 0.024 Msun
    assuming a dust temperature of 20 K and mass opacity of 0.03 cm^2/g.
    Eighteen
    other proplyds within the field of view are not detected individually, but
    the
    flux distribution toward their locations is slightly higher than the
    background
    and has an average value of 1.1 mJy which corresponds to a mass of 8e-4
    Msun.
    The four detected proplyds have sufficient disk mass bound to their central
    stars to form planetary systems on the scale of our Solar System.

    \\ ( http://arXiv.org/abs/astro-ph/0506225 , 402kb)

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