2009A&A...502..623R


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET22:20:48

2009A&A...502..623R - Astronomy and Astrophysics, volume 502, 623-646 (2009/8-1)

Spatially resolved mid-infrared observations of the triple system T Tauri.

RATZKA T., SCHEGERER A.A., LEINERT C., ABRAHAM P., HENNING T., HERBST T.M., KOEHLER R., WOLF S. and ZINNECKER H.

Abstract (from CDS):

The aim of this study is to enhance our knowledge of the characteristics and distribution of the circumstellar dust associated with the individual components of the young hierarchical triple system T Tau. To reach this goal, observations in the N-band (8-13µm) with the two-telescope interferometric instrument MIDI at the VLTI were performed. For the northern component of the T Tau system, projected baseline lengths of 43m, 62m, and 85m were used. For the southern binary projected baseline lengths of equivalent resolution could be utilised. Our study is based on both the interferometric and the spectrophotometric measurements and is supplemented by new visual and infrared photometry. Also, the phases were investigated to determine the dominating mid-infrared source in the close southern binary. The data were fit with the help of a sophisticated physical disc model. This model utilises the radiative transfer code MC3D that is based on the Monte-Carlo method. Extended mid-infrared emission is found around all three components of the system. Simultaneous fits to the photometric and interferometric data confirm the picture of an almost face-on circumstellar disc around T Tau N. Towards this star, the silicate band is seen in emission. This emission feature is used to model the dust content of the circumstellar disc. Clear signs of dust processing are found. Towards T Tau S, the silicate band is seen in absorption. This absorption is strongly pronounced towards the infrared companion T Tau Sa as can be seen from the first individual N-band spectra for the two southern components. Our fits support the previous suggestion that an almost edge-on disc is present around T Tau Sa. This disc is thus misaligned with respect to the circumstellar disc around T Tau N. The interferometric data indicate that the disc around T Tau Sa is oriented in the north-south direction, which favours this source as launching site for the east-western jet. We further determine from the interferometric data the relative positions of the components of the southern binary in the N-band. We find good agreement with recent position measurements in the near-infrared.

Abstract Copyright:

Journal keyword(s): stars: individual: T Tauri - circumstellar matter - stars: pre-main sequence - techniques: interferometric - infrared: stars

Simbad objects: 21

goto Full paper

goto View the reference in ADS

Number of rows : 21

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 HD 20644 * 03 20 20.3611110 +29 02 54.445135 7.81 6.02 4.47 3.27 2.39 K3IIIaBa0.5 116 0
2 * 37 Tau PM* 04 04 41.7148415 +22 04 54.924282 6.41 5.44 4.37 3.58 3.05 K0III-IIIb 169 0
3 HH 155 HH 04 21 57.1 +19 32 07           ~ 72 1
4 V* RY Tau TT* 04 21 57.4132838427 +28 26 35.533990877 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 634 1
5 NAME T Tau Sb *i* 04 21 59.371 +19 32 05.95           M1 69 0
6 NAME T Tau Sa *i* 04 21 59.371 +19 32 05.95           ~ 65 0
7 NAME T Tau S ** 04 21 59.371 +19 32 05.95           K7 137 2
8 V* T Tau TT* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1239 2
9 NAME T Tau N *i* 04 21 59.433 +19 32 06.42   11.22 10.12 9.80   K1.5 163 1
10 * omi02 Ori PM* 04 56 22.2761159 +13 30 52.093197 6.31 5.21 4.06 3.18 2.55 K2-IIIb 110 0
11 * phi02 Ori PM* 05 36 54.3881859 +09 17 26.409553 5.70 5.04 4.09 3.33 2.78 G9.5IIIbFe-2.5 335 0
12 * tet CMa PM* 06 54 11.3997692336 -12 02 19.061054441 7.20 5.51 4.08 2.95 2.17 K3/4III 207 0
13 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 518 3
14 * alf Mon PM* 07 41 14.8325688 -09 33 04.071083 5.83 4.95 3.93 3.16 2.64 G9.5III-IIIbFe-0.5 181 0
15 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1447 1
16 * eps Crt * 11 24 36.5904786153 -10 51 33.557849078   6.338 4.802     K4III 83 0
17 * eta Vir SB* 12 19 54.3488819446 -00 40 00.599569600 3.99 3.92 3.90 3.82 3.82 A2IV 230 0
18 * del Oph PM* 16 14 20.73853 -03 41 39.5612 6.30 4.34 2.75 1.46 0.43 M0.5III 341 0
19 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11047 0
20 * bet CrA * 19 10 01.7558032 -39 20 26.864359   5.281 4.095     K0II/IIICNIb 49 0
21 * b Sgr * 19 56 56.8316470 -27 10 11.640936   5.980 4.528     K2.5IIb 59 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009A&A...502..623R and select 'bookmark this link' or equivalent in the popup menu


2019.11.17-22:20:48

© Université de Strasbourg/CNRS

    • Contact