A circumstellar disk in a high-mass star-forming region
Journal article, 2004

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 NGC 7538 IRS 1N. 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 30 M-., suggested by other observations, our model fixes the masing disk to have inner and outer radii of similar to 350 and similar to 1000 AU.


accreation disks - ISM: kinematics and dynamics - masers - stars: formation - stars: individual (NGC 7538 IRS IN)


Michele Pestalozzi

Chalmers, Department of Radio and Space Science

Moshe Elitzur

University of Kentucky

John Conway

Chalmers, Department of Radio and Space Science

Roy Booth

Chalmers, Onsala Space Observatory

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 603 2 L113-L116

Subject Categories

Astronomy, Astrophysics and Cosmology

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