2006A&A...452..897C


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET02:52:51

2006A&A...452..897C - Astronomy and Astrophysics, volume 452, 897-906 (2006/6-4)

Tidal stripping and disk kinematics in the RW Aurigae system.

CABRIT S., PETY J., PESENTI N. and DOUGADOS C.

Abstract (from CDS):

We present interferometric maps of the RW Aur system obtained with the IRAM Plateau de Bure Interferometer in CO(J=2-1), CO(J=1-0), and nearby continuum. The sub-arcsecond angular resolution (0.89''x0.58'') and high-sensitivity reached at 1.3 mm enable us to resolve three molecular structures: (1) an optically thick disk around RW Aur A in rotation about the optical jet axis, (2) a disturbed asymmetric peak around RW Aur B, (3) a 600 AU-long ``arm'' of material trailing from the RW Aur A disk. Comparison with Keplerian models indicates that the RW Aur A disk is the smallest detected so far around a T Tauri star (radius 40-57AU) and that the CO emitting layer at the outer edge is warmer than the dust (T++_out≃60-100K) and relatively thick (N++_warm≃0.1-10x1022/cm2). The morphology and kinematics of the detected features strongly suggest that we are witnessing tidal stripping of the primary disk by the recent fly-by of RW Aur B. We speculate that tidal dissipation might explain the warmer gas temperatures in the RW Aur A disk compared with typical T Tauri stars, and perhaps play a role in its elevated accretion rate. We also find that the rotation sense of the RW Aur A disk is opposite to transverse velocity shifts in the optical jet reported by Woitas et al. (2005A&A...432..149W). We argue that these transverse shifts are likely to represent only upper limits to the true jet rotation speed. The limits remain consistent with current models of MHD launching from the disk.

Abstract Copyright:

Journal keyword(s): stars: individual: RW Aur - stars: formation - stars: circumstellar matter - ISM: molecules - radio lines: ISM

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 870 1
2 V* DG Tau Or* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 947 1
3 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1246 0
4 V* HL Tau Or* 04 31 38.471952 +18 13 58.08504   15.89 14.49 14.39   K5 1240 0
5 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
6 V* DM Tau Or* 04 33 48.7335659850 +18 10 09.974471722 14.30 14.82 14.00     M2Ve 533 0
7 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 580 1
8 HD 31648 Ae* 04 58 46.2654165113 +29 50 36.990341242 7.84 7.78 7.62 7.76 7.43 A5Vep 411 0
9 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 728 0
10 QSO J0530+13 Bla 05 30 56.41672 +13 31 55.1495     20.0 19.35   ~ 893 1
11 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 720 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-02:52:51

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