2003A&A...408.1015L


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET15:20:47

2003A&A...408.1015L - Astronomy and Astrophysics, volume 408, 1015-1028 (2003/9-4)

Probing the rotation curve of the outer accretion disk in FU Orionis objects with long-wavelength spectroscopy.

LODATO G. and BERTIN G.

Abstract (from CDS):

Studies of the Spectral Energy Distribution of Young Stellar Objects suggest that the outer disk of FU Orionis objects might be self-gravitating. In this paper we propose a method to test directly whether, in these objects, significant deviations from Keplerian rotation occur. In a first approach, we have used a simplified model of the disk vertical structure that allows us to quickly bring out effects related to the disk self-gravity. We find that the often studied optical and near-infrared line profiles are produced too close to the central object to provide significant evidence for non-Keplerian rotation. Based on parameters relevant for the case of FU Ori, we show that high-resolution long-wavelength spectroscopy, of the far-infrared H2 pure rotational lines (sometimes observed in ``passive'' protostellar disks) and sub-mm CO lines, should be well suited to probe the rotation curve in the outer disk, thus measuring to what extent it is affected by the disk self-gravity. The results of the present exploratory paper should be extended soon to a more realistic treatment of the disk vertical structure.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - gravitation - stars: pre-main sequence

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* FU Ori FU* 05 45 22.3650208559 +09 04 12.296285806   10.72 9.60     F0Iab 687 1
2 EM* LkHA 120 TT* 21 01 09.2068364908 +50 21 44.803310926 13.37 13.09 11.99 11.75   F0/F4-G5 185 1

    Equat.    Gal    SGal    Ecl

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2019.12.10-15:20:47

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