Abstract
We present an edge-on Keplerian disk model to explain the main component of the 12.2 and 6.7 GHz methanol maser emission detected toward NGC7538-IRS 1 N. The brightness distribution and spectrum of the line of bright masers are successfully modeled with high amplification of background radio continuum emission along velocity coherent paths through a maser disk. The bend seen in the position—velocity diagram is a characteristic signature of differentially rotating disks. For a central mass of 30Mʘ, suggested by other observations, our model fixes the making disk to have inner and outer radii of ∼270 and ∼750 AU.
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© 2005 Springer
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Pestalozzi, M., Elitzur, M., Conway, J., Booth, R. (2005). NGC7538 IRS1 N: Modeling a Circumstellar Maser Disk. In: Baan, W., Hagiwara, Y., van Langevelde, H. (eds) Dense Molecular Gas Around Protostars and in Galactic Nuclei. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3831-3_27
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DOI: https://doi.org/10.1007/1-4020-3831-3_27
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Online ISBN: 978-1-4020-3831-0
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