2014A&A...567A.117G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST10:24:01

2014A&A...567A.117G - Astronomy and Astrophysics, volume 567A, 117-117 (2014/7-1)

The masses of young stars: CN as a probe of dynamical masses.

GUILLOTEAU S., SIMON M., PIETU V., DI FOLCO E., DUTREY A., PRATO L. and CHAPILLON E.

Abstract (from CDS):

We attempt to determine the masses of single or multiple young T Tauri and HAeBe stars from the rotation of their Keplerian disks. We used the IRAM PdBI interferometer to perform arcsecond resolution images of the CN N=2-1 transition with good spectral resolution. Integrated spectra from the 30m radiotelescope show that CN is relatively unaffected by contamination from the molecular clouds. Our sample includes 12 sources, among which isolated stars like DM Tau and MWC 480 are used to demonstrate the method and its accuracy. We derive the dynamical mass by fitting a disk model to the emission, a process giving M/D, the mass-to-distance ratio. We also compare the CN results with higher resolution CO data, that are however affected by contamination. All disks are found in nearly perfect Keplerian rotation. We determine accurate masses for 11 stars, in the mass range 0.5 to 1.9M. The remaining one, DG Tau B, is a deeply embedded object for which CN emission partially arises from the outflow. With previous determinations, this leads to 14 (single) stars with dynamical masses. Comparison with evolutionary tracks, in a distance independent modified HR diagram, show good overall agreement (with one exception, CW Tau), and indicate that measurement of effective temperatures are the limiting factor. The lack of low mass stars in the sample does not allow to distinguish between alternate tracks.

Abstract Copyright:

Journal keyword(s): circumstellar matter - protoplanetary disks - radio lines: stars

Simbad objects: 37

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Number of rows : 37

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3459 3
2 QSO B0400+258 QSO 04 03 05.58606763 +26 00 01.5028075     18 19.00   ~ 176 1
3 V* CW Tau TT* 04 14 17.0041128798 +28 10 57.765657757 13.92 13.64 12.36 12.86   K0Ve 308 0
4 V* CY Tau TT* 04 17 33.7281514373 +28 20 46.809969664 14.52 14.68 13.40 12.59   M1.5 221 0
5 LDN 1495 DNe 04 18.1 +27 37           ~ 274 1
6 V* FT Tau TT* 04 23 39.193 +24 56 14.11       14.37   M2.8 103 0
7 NAME DG Tau B Y*O 04 27 02.666 +26 05 30.38           ~ 126 1
8 V* IQ Tau TT* 04 29 51.5569553814 +26 06 44.854858369 15.43   13.80 12.28 11.11 M0.5 191 0
9 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1180 1
10 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 760 1
11 EM* LkHA 358 TT* 04 31 36.1396524070 +18 13 43.176961457     19.0     M0.9 85 0
12 V* V1213 Tau Or* 04 31 37.472 +18 12 24.48   19.78       K7 505 0
13 Haro 6-13 TT* 04 32 15.4177438039 +24 28 59.580866027 19.22   17.7     M0 175 1
14 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 208 0
15 IRAS 04302+2247 Y*O 04 33 16.501 +22 53 20.40           ~ 130 0
16 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
17 V* DM Tau TT* 04 33 48.7335659850 +18 10 09.974471722 14.30 14.82 14.00     M2Ve 484 0
18 V* CI Tau TT* 04 33 52.0144455735 +22 50 30.093741884 14.97 15.09 13.80     K4IVe 243 0
19 V* DN Tau TT* 04 35 27.3776240781 +24 14 58.908761629 13.56 12.88 11.50 11.79   M1:Ve 337 0
20 CoKu HP Tau G2 TT* 04 35 54.1553246504 +22 54 13.404170652 13.63 12.31 11.158 10.14 9.172 G2e 108 0
21 V* HV Tau TT* 04 38 35.3 +26 10 39           M4.1 106 0
22 NAME HV Tau C TT* 04 38 35.5121708248 +26 10 41.334466864         14.90 K6 82 0
23 EM* LkCa 15 TT* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 519 1
24 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3306 0
25 Haro 6-33 TT* 04 41 38.8300758211 +25 56 26.681998749     18.40     M0.5 96 2
26 V* GO Tau TT* 04 43 03.0761884276 +25 20 18.708294279   16.2 14.40     M2.3 144 0
27 V* DS Tau TT* 04 47 48.5954846337 +29 25 11.189809829 13.11 13.16 12.30 12.37 10.80 K4Ve 200 0
28 V* GM Aur TT* 04 55 10.9813656049 +30 21 59.375978047 14.59 14.22 13.10     K3Ve 530 0
29 LDN 1517 DNe 04 55 45 +30 33.0           ~ 93 0
30 V* V397 Aur TT* 04 56 02.0261376554 +30 21 03.635056925   13.07 11.72 11.25   K7e 147 0
31 HD 31648 Ae* 04 58 46.2654165113 +29 50 36.990341242 7.84 7.78 7.62 7.76 7.43 A5Vep 372 0
32 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 276 1
33 HD 36112 Ae* 05 30 27.5286772598 +25 19 57.082162439   8.57 8.27     A8Ve 323 0
34 V* V2212 Ori Al* 05 35 11.1412127665 -05 36 51.210193000 18.461 16.619 15.379   12.444 M2 47 0
35 V* CQ Tau Ae* 05 35 58.4671238887 +24 44 54.086375712 11.290 10.780 10.000   8.33 F5IVe 245 0
36 EM* MWC 349 Em* 20 32 45.6328 +40 39 36.143   15.88 13.15 12.13   Bep 689 1
37 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2439 2

    Equat.    Gal    SGal    Ecl

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2019.10.16-10:24:01

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