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A circumstellar disk in a high-mass star-forming region

Michele Pestalozzi (Institutionen för radio- och rymdvetenskap) ; Moshe Elitzur ; John Conway (Institutionen för radio- och rymdvetenskap) ; Roy Booth (Onsala Rymdobservatorium)
Astrophysical Journal Letters (0004-637X). Vol. 603 (2004), 2, p. L113-L116.
[Artikel, refereegranskad vetenskaplig]

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.

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

Denna post skapades 2006-08-28. Senast ändrad 2014-09-02.
CPL Pubid: 1618


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Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap (1984-2004)
Onsala Rymdobservatorium (1900-2004)


Astronomi, astrofysik och kosmologi

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