2009A&A...494..147L


Query : 2009A&A...494..147L

2009A&A...494..147L - Astronomy and Astrophysics, volume 494, 147-156 (2009/1-4)

Rotating molecular outflows: the young T Tauri star in CB26.

LAUNHARDT R., PAVLYUCHENKOV Y., GUETH F., CHEN X., DUTREY A., GUILLOTEAU S., HENNING T., PIETU V., SCHREYER K. and SEMENOV D.

Abstract (from CDS):

The disk-outflow connection is thought to play a key role in extracting excess angular momentum from a forming proto-star. Although jet rotation has been observed in a few objects, no rotation of molecular outflows has been unambiguously reported so far. We report new millimeter-interferometric observations of the edge-on TTauristar - disk system in the isolated Bok globule CB26. The aim of these observations was to study the disk-outflow relation in this 1Myr old low-mass young stellar object. The IRAM PdBI array was used to observe 12CO(2-1) at 1.3mm in two configurations, resulting in spectral line maps with 1.5" resolution. We use an empirical parameterized steady-state outflow model combined with 2-D line radiative transfer calculations and χ2-minimization in parameter space to derive a best-fit model and constrain parameters of the outflow. The data reveal a previously undiscovered collimated bipolar molecular outflow of total length ≃2000AU, escaping perpendicular to the plane of the disk. We find peculiar kinematic signatures that suggest that the outflow is rotating with the same orientation as the disk. However, we could not ultimately exclude jet precession or two misaligned flows as possible origins of the observed peculiar velocity field. There is indirect indication that the embedded driving source is a binary system, which, together with the youth of the source, could provide a clue to the observed kinematic features of the outflow. CB26 is so far the most promising source in which to study the rotation of a molecular outflow. Assuming that the outflow is rotating, we compute and compare masses, mass flux, angular momenta, and angular momentum flux of the disk and outflow and derive disk dispersal timescales of 0.5...1Myr, comparable to the age of the system.

Abstract Copyright:

Journal keyword(s): circumstellar matter - ISM: jets and outflows - stars: pre-main sequence - planetary systems: protoplanetary disks - ISM: molecules

VizieR on-line data: <Available at CDS (J/A+A/494/147): cb26co21lmv.fits>

Simbad objects: 19

goto Full paper

goto View the references in ADS

Number of rows : 19
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HH 288 HH 00 37 13.6 +64 04 15           ~ 22 0
2 HH 211 cor 03 43 56.52 +32 00 52.8           ~ 325 0
3 4C 50.11 QSO 03 59 29.7469819512 +50 57 50.159106936           ~ 415 1
4 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1294 0
5 V* V1213 Tau Or* 04 31 37.5055489536 +18 12 24.383952396           K7 540 0
6 V* DM Tau Or* 04 33 48.7336763736 +18 10 09.973460280 14.30 14.82 14.00     M2Ve 579 0
7 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 612 1
8 HD 31648 Ae* 04 58 46.2655706952 +29 50 36.987625680 7.84 7.78 7.62 7.76 7.43 A5Vep 458 0
9 LDN 1437 DNe 04 59 04.1 +52 03 24           ~ 20 0
10 HH 494 HH 04 59 29.4 +52 09 52           ~ 4 0
11 LDN 1439 DNe 05 00 09 +52 04.9           ~ 83 0
12 HH 212 HH 05 43 51.41 -01 02 53.1           ~ 333 1
13 HH 26 HH 05 46 05.1 -00 14 17           ~ 98 1
14 HH 111 HH 05 51 44.2 +02 48 34           ~ 397 0
15 Ced 96 Y*O 07 20 10.3 -24 02 24           ~ 30 1
16 CG 30 CGb 08 09 32.8 -36 05 00           ~ 126 0
17 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5559 1
18 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 753 0
19 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2664 2

To bookmark this query, right click on this link: simbad:objects in 2009A&A...494..147L and select 'bookmark this link' or equivalent in the popup menu


2022.05.28-22:03:57

© Université de Strasbourg/CNRS

    • Contact