2005A&A...434.1005A


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.14CET11:28:55

2005A&A...434.1005A - Astronomy and Astrophysics, volume 434, 1005-1019 (2005/5-2)

Edge-on T Tauri stars.

APPENZELLER I., BERTOUT C. and STAHL O.

Abstract (from CDS):

Using the Uves echelle spectrograph at the ESO VLT we obtained two-dimensional high-resolution (R=50000) spectra of the edge-on disk objects HH30*, HK Tau B, and HV Tau C. For comparison purposes we also observed with the same equipment both the classical T Tauri star HL Tau and the active late-type star LDN 1551-9. The spectra of all three observed edge-on disks consist of a T Tauri emission and absorption line spectrum with superimposed jet emission lines. Analysis of the spectra confirmed that the disks are completely opaque at visible wavelengths and that light from the central objects reaches us only via scattering layers above and below the disk planes. The central objects of our targets were found to be normal T Tauri stars showing moderate but different amounts of veiling of their photospheric spectra, indicating different accretion rates or evolutionary stages. We suggest that all classical T Tauri stars (CTTSs) show this observed morphology when viewed edge-on. Part of the jet emission from edge-on systems is directly visible to us in the forbidden lines as well as in Hα and Hei, a finding which contradicts the present paradigm of a pure magnetospheric accretion origin for the formation of hydrogen and helium emission lines in moderately active CTTSs. From a comparison with those Taurus-Auriga CTTSs for which the inclination is reliably known, we conclude that the view angle of CTTS systems is one of the key parameters governing apparent Hα emission strength in the T Tauri class. We discuss the various possible formation regions for the NaiD lines and show that profiles similar to observed ones can be formed at the base of the disk wind.

Abstract Copyright:

Journal keyword(s): stars: formation - stars: pre-main sequence - ISM: jets and outflows - planetary systems: proto-planetary disks - line: formation

Simbad objects: 27

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Number of rows : 27

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* BP Tau TT* 04 19 15.8342975037 +29 06 26.929456808   13.13 12.12 11.89   K5/7Ve 584 0
2 V* DE Tau TT* 04 21 55.6346296353 +27 55 06.184221341 15.18 15.13 13.80     M3Ve 216 0
3 V* T Tau TT* 04 21 59.4323326335 +19 32 06.439974179   11.01 9.30 9.80   K0IV/Ve 1239 2
4 V* DF Tau TT* 04 27 02.7917481241 +25 42 22.456361256 11.97 12.25 11.42 10.31 9.14 M3Ve 455 1
5 V* DG Tau TT* 04 27 04.6913654419 +26 06 16.041555299 13.57 13.97 10.50 12.28   K6Ve 901 1
6 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1182 1
7 NAME DK Tau A * 04 30 44.2409691803 +26 01 24.730398215           K5Ve 247 0
8 V* DK Tau TT* 04 30 44.251 +26 01 24.47 13.32 13.14 11.90 12.58   K7e+K7e 289 0
9 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 761 1
10 V* V1213 Tau Or* 04 31 37.472 +18 12 24.48   19.78       K7 505 0
11 V* HL Tau TT* 04 31 38.437 +18 13 57.65   16.02 15.10 14.21   K5 1129 0
12 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
13 NAME HK Tau A *i* 04 31 50.55 +24 24 18.6           M1 27 0
14 NAME HK Tau B TT* 04 31 50.58 +24 24 16.4           M1 64 0
15 GSC 01269-00641 * 04 31 58.5998345787 +18 18 40.355553931     13.5     K6 9 0
16 V* GG Tau TT* 04 32 30.3318954228 +17 31 40.834888327 14.84 14.78 13.40 11.54   M0e+M2.0e 617 1
17 V* GK Tau TT* 04 33 34.560 +24 21 05.85 15.50   13.00 11.58 10.62 K7:Ve 263 0
18 V* DL Tau TT* 04 33 39.0766866461 +25 20 38.097973550 14.04 14.59 13.40 11.85 10.89 K7Ve 273 0
19 V* AA Tau TT* 04 34 55.4222683130 +24 28 53.038273587 13.14 13.34 12.20     K5Ve 601 0
20 V* DN Tau TT* 04 35 27.3776240781 +24 14 58.908761629 13.56 12.88 11.50 11.79   M1:Ve 338 0
21 V* DO Tau TT* 04 38 28.5882167490 +26 10 49.472067634 12.78 13.44 12.30 13.01   M1Ve 302 1
22 NAME HV Tau AB Y*O 04 38 35.2903493114 +26 10 38.646251388           M1Ve 95 0
23 V* HV Tau TT* 04 38 35.3 +26 10 39           M4.1 106 0
24 NAME HV Tau C TT* 04 38 35.5121708248 +26 10 41.334466864         14.90 K6 82 0
25 V* DR Tau TT* 04 47 06.2152696011 +16 58 42.814250257 12.03 11.86 10.50 12.19   K5Ve 462 0
26 V* RW Aur TT* 05 07 49.538 +30 24 05.07   10.86 9.60 9.95   K1/5e+K5e 696 0
27 V* TW Hya TT* 11 01 51.9054298616 -34 42 17.031550898   11.94 10.50 10.626 9.18 K6Ve 1447 1

    Equat.    Gal    SGal    Ecl

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2019.11.14-11:28:55

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