EDP Sciences
Free access
Issue
A&A
Volume 389, Number 2, July II 2002
Page(s) 464 - 474
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20020608


A&A 389, 464-474 (2002)
DOI: 10.1051/0004-6361:20020608

Vertical structure models of T Tauri and Herbig Ae/Be disks

C. P. Dullemond, G. J. van Zadelhoff and A. Natta

Max Planck Institut für Astrophysik, PO Box 1317, 85741 Garching, Germany
    e-mail: dullemon@mpa-garching.mpg.de Leiden Observatory, PO Box 9513, 2300 Leiden, The Netherlands
    e-mail: zadelhof@strw.leidenuniv.nl Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy

(Received 12 February 2002 / Accepted 15 April 2002)

Abstract
In this paper we present detailed models of the vertical structure (temperature and density) of passive irradiated circumstellar disks around T Tauri and Herbig Ae/Be stars. In contrast to earlier work, we use full frequency- and angle-dependent radiative transfer instead of the usual moment equations. We find that this improvement of the radiative transfer has a strong influence on the resulting vertical structure of the disk, with differences in temperature as large as 70%. However, the spectral energy distribution (SED) is only mildly affected by this change. In fact, the SED compares reasonably well with that of improved versions of the Chiang & Goldreich (CG) model. This shows that the latter is a reasonable model for the SED, in spite of its simplicity. It also shows that from the SED alone, little can be learned about the vertical structure of a passive circumstellar disk. The molecular line emission from these disks is more sensitive to the vertical temperature and density structure, and we show as an example how the intensity and profiles of various CO lines depend on the adopted disk model. The models presented in this paper can also serve as the basis of theoretical studies of e.g. dust coagulation and settling in disks.


Key words: accretion, accretion disks -- stars: circumstellar matter -- stars: formation -- stars: pre-main sequence -- infrared: stars

Offprint request: C. P. Dullemond, dullemon@mpa-garching.mpg.de




© ESO 2002

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access.

An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account.
    In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.