Synchrotron emission from circumstellar disks around massive stars

Y. A. Shchekinov; A. M. Sobolev

doi:10.1051/0004-6361:20035923

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Volume 418 / No 3 (May II 2004)

A&A, 418 3 (2004) 1045-1050

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Issue		A&A Volume 418, Number 3, May II 2004


Page(s)		1045 - 1050
Section		Interstellar and circumstellar matter
DOI		https://doi.org/10.1051/0004-6361:20035923
Published online		16 April 2004

A&A 418, 1045-1050 (2004)

Synchrotron emission from circumstellar disks around massive stars

Y. A. Shchekinov¹^,2 and A. M. Sobolev³

¹ Department of Physics, Rostov State University, Rostov on Don 344090, Russia
² Isaac Newton Institute of Chile, Rostov on Don Branch, Russia
³ Astronomical Observatory, Ural State University, Ekaterinburg 620083, Russia e-mail: Andrej.Sobolev@usu.ru

Corresponding author: Y. A. Shchekinov, yus@phys.rsu.ru

Received: 20 December 2003
Accepted: 13 February 2004

Abstract

We argue that the interaction of stellar wind with the surface of a circumstellar accretion (or protoplanetary) disk can result in the acceleration of relativistic electrons in an external layer of the disk, and produce synchrotron radiation. Conservative estimates give a total synchrotron luminosity $L_{\rm s}\sim 10^{-5}~L_\odot$ for a central star with $\dot M=10^{-6}~M_\odot$ yr^-1, comparable with the value observed around the TW object in the W3(OH) region.

Key words: accretion, accretion disks / stars: circumstellar matter / acceleration of particles

© ESO, 2004

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