2005A&A...434.1005A


Query : 2005A&A...434.1005A

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: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* BP Tau Or* 04 19 15.8339827632 +29 06 26.926959492   13.13 12.12 11.89   K5/7Ve 658 0
2 V* DE Tau Or* 04 21 55.6347850824 +27 55 06.184016436 15.18 15.13 13.80     M3Ve 256 0
3 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1390 1
4 V* DF Tau TT* 04 27 02.7932020080 +25 42 22.453341516 11.97 12.25 11.42 10.31 9.14 M3Ve 496 1
5 V* DG Tau Or* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1013 1
6 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1339 0
7 V* DK Tau A * 04 30 44.2408811328 +26 01 24.734232948           K5Ve 261 0
8 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 327 0
9 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 798 1
10 V* V1213 Tau Or* 04 31 37.5055489536 +18 12 24.383952396           K7 559 0
11 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1392 0
12 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 796 0
13 V* HK Tau TT* 04 31 50.5715875272 +24 24 17.775307548 16.81 16.689 15.292     M0.5 335 1
14 V* HK Tau B TT* 04 31 50.6002481212 +24 24 15.502558869           ~ 83 0
15 GSC 01269-00641 * 04 31 58.6034101464 +18 18 40.330209132     13.5     K6 9 0
16 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 725 1
17 V* GK Tau Or* 04 33 34.5630097872 +24 21 05.855136732 15.50   13.00 12.02 10.62 K7:Ve 302 0
18 V* DL Tau Or* 04 33 39.0767679288 +25 20 38.101382952 14.04 14.59 13.40 11.85 10.89 K7Ve 328 0
19 V* AA Tau Or* 04 34 55.4201902392 +24 28 53.033624580 13.14 13.34 12.20 12.03   K5Ve 713 0
20 V* DN Tau Or* 04 35 27.3776226144 +24 14 58.910343720 13.56 12.88 11.50 11.79   M1:Ve 391 0
21 V* DO Tau Or* 04 38 28.5880527336 +26 10 49.467596196 12.78 13.44 12.30 13.01   M1Ve 368 1
22 V* HV Tau Or* 04 38 35.2904827968 +26 10 38.640143136           M1Ve 139 0
23 V* HV Tau C TT* 04 38 35.5125950280 +26 10 41.316576204         14.90 K6 95 0
24 V* DR Tau Or* 04 47 06.2151561264 +16 58 42.813872580 12.03 11.86 10.50 12.19   K5Ve 526 0
25 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 776 0
26 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1850 1

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2023.09.25-15:34:10

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