1999A&A...342..480S

Query : 1999A&A...342..480S

1999A&A...342..480S - Astronomy and Astrophysics, volume 342480-491 (1999/2-2)

Physics of accretion onto young stars. III. Comparisons with observations.

SIESS L., FORESTINI M. and BERTOUT C.

Abstract (from CDS):

We present new evolutionary sequences for long lasting accreting low-mass (0.1M☉≤M≤2.5M☉) pre-main sequence stars. The calculations, performed for two different mass accretion rates, show that accretion accelerates the evolution of the star. The star has a smaller radius and goes down its convective track faster than in a standard scheme. Consequently, the age of a star, as given by its location on the Hertzsprung-Russell diagram, is lower than that of a non-accreting star. We discuss 2H and 7Li burning and show how accretion affects the surface abundance of these elements. Notably, we point out that deuterium must be present at the surface of accreting intermediate-mass stars. Finally, we estimate the age, mass and radius of a sample of T Tauri stars located in the Taurus Auriga star forming region.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - stars: abundances - stars: evolution - stars: fundamental parameters - stars: pre-main sequence

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V679 Tau TT* 03 52 02.2372961328 +24 39 47.681148816   13.57 11.41 11.89 10.77 K5e 140 0
2 HD 283447 Or* 04 14 12.9261150912 +28 12 12.359055168 13.17 12.07 10.68 9.45 8.67 K3Ve 445 0
3 V* FM Tau Or* 04 14 13.5841955640 +28 12 49.168982592 14.44   13.80 13.64   M0/2e 227 0
4 V* V1098 Tau Or* 04 14 47.9897419517 +27 52 34.232647358   14.08 11.73 10.95   M1 122 0
5 EM* LkCa 4 Or* 04 16 28.1067298272 +28 07 35.731363080   13.96 12.78 11.825   K7:Ve 208 0
6 V* V1069 Tau Or* 04 18 51.7036254480 +17 23 16.582694856   13.32 12.22 12.22 10.944 K7e 143 0
7 V* BP Tau Or* 04 19 15.8339827632 +29 06 26.926959492   13.13 12.12 11.89   K5/7Ve 721 0
8 WK81 1 TT* 04 19 26.2675117776 +28 26 14.259575472   14.81 13.04 12.240   K7 249 1
9 V* V1070 Tau Or* 04 19 41.2693061839 +27 49 48.149079865   13.75 12.25 11.14   M0 161 0
10 V* DE Tau Or* 04 21 55.6347850824 +27 55 06.184016436 15.18 15.13 13.80     M3Ve 286 0
11 V* RY Tau TT* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 744 1
12 HD 283572 Or* 04 21 58.8484815456 +28 18 06.512641416   9.80 9.03 9.14   G5IVe 308 0
13 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1456 1
14 V* IP Tau Or* 04 24 57.0824018640 +27 11 56.539953888   14.50   12.46   M0:Ve 265 0
15 V* DF Tau TT* 04 27 02.7932020080 +25 42 22.453341516 11.97 12.25 11.42 10.31 9.14 M3Ve 528 1
16 V* DG Tau TT* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1092 1
17 V* DH Tau Or* 04 29 41.5525353432 +26 32 58.126559604 15.14 14.62 13.10 13.01   M1Ve 323 0
18 V* UX Tau A TT* 04 30 03.9932216088 +18 13 49.469925504   12.92 11.15     K2Ve 386 0
19 V* UX Tau Or* 04 30 03.99626 +18 13 49.4355 11.23 11.84 10.80 9.83 9.05 K2Ve+M1Ve 380 0
20 V* FX Tau Or* 04 30 29.618064 +24 26 45.02724   15.18 13.61 13.21   M4 166 0
21 V* DK Tau A Or* 04 30 44.2408811328 +26 01 24.734232948           K5Ve 271 0
22 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 350 0
23 HBC 392 Or* 04 31 27.1761425664 +17 06 24.744279276   13.71       K5e 82 0
24 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
25 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
26 L 1551-51 Or* 04 32 09.2839413744 +17 57 22.693472640   13.29       K7e 147 0
27 V* V827 Tau TT* 04 32 14.5700738928 +18 20 14.771601168   14.00 12.63 12.35   K7Ve 179 0
28 V* V826 Tau TT* 04 32 15.8393134800 +18 01 38.750623752   13.51 12.074   10.312 K7.0 187 0
29 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 793 1
30 V* GH Tau Or* 04 33 06.2186830512 +24 09 33.584489856     13.20 12.59   M3Ve 197 0
31 V* V830 Tau TT* 04 33 10.0300557048 +24 33 43.255480860   13.91 12.08 11.30   M0-1 238 1
32 V* GI Tau Or* 04 33 34.0609697160 +24 21 17.068989852 14.34   13.70 12.15 11.06 K5Ve 307 1
33 V* GK Tau Or* 04 33 34.5630097872 +24 21 05.855136732 15.50   13.00 12.02 10.62 K7:Ve 338 0
34 V* DL Tau Or* 04 33 39.0767679288 +25 20 38.101382952 14.04 14.59 13.40 11.85 10.89 K7Ve 372 0
35 V* CI Tau Or* 04 33 52.0143963264 +22 50 30.094090908 14.97 15.09 13.80     K4IVe 422 1
36 V* AA Tau Or* 04 34 55.4201902392 +24 28 53.033624580 13.14 13.34 12.20 12.03   K5Ve 801 0
37 V* DN Tau Or* 04 35 27.3776226144 +24 14 58.910343720 13.56 12.88 11.50 11.79   M1:Ve 448 0
38 CoKu HP Tau G2 Or* 04 35 54.1535049648 +22 54 13.426506072 13.63 12.31 11.158 10.14 9.172 G2e 138 0
39 V* DO Tau Or* 04 38 28.5880527336 +26 10 49.467596196 12.78 13.44 12.30 13.01   M1Ve 413 1
40 V* VY Tau Or* 04 39 17.4194063616 +22 47 53.348542332     9.00     M0Ve 205 0
41 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 792 1
42 V* IW Tau Or* 04 41 04.7179844751 +24 51 06.034940625   14.25 12.595 11.65 10.504 K7Ve 129 0
43 Haro 6-37 Or* 04 46 58.97952 +17 02 38.1948           K7e+M1e 125 0
44 V* DR Tau Or* 04 47 06.2151561264 +16 58 42.813872580 12.03 11.86 10.50 12.19   K5Ve 585 0
45 V* DS Tau Or* 04 47 48.5954691000 +29 25 11.191621512 13.11 13.16 12.30 12.37 10.80 K4Ve 281 0
46 V* GM Aur Or* 04 55 10.9815576936 +30 21 59.373771876 14.59 13.351 12.242 11.798   K3Ve 797 0
47 HD 282630 Or* 04 55 36.9695564640 +30 17 55.101300900   12.17 11.12 10.55   K0Ve 185 0
48 V* SU Aur Or* 04 55 59.3866872552 +30 34 01.499608092   10.33 9.30 9.17   G2IIIne 628 0
49 V* V397 Aur Or* 04 56 02.0265224208 +30 21 03.670989228   13.07 11.72 11.25   K7e 183 0
50 V* V836 Tau TT* 05 03 06.5988375912 +25 23 19.606639488   15.00 13.49 13.48   K7/M0Ve 249 0
51 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 816 0

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