2017ApJ...844..158S

Query : 2017ApJ...844..158S

2017ApJ...844..158S - Astrophys. J., 844, 158-158 (2017/August-1)

Dynamical masses of low-mass stars in the Taurus and Ophiuchus star-forming regions.

SIMON M., GUILLOTEAU S., DI FOLCO E., DUTREY A., GROSSO N., PIETU V., CHAPILLON E., PRATO L., SCHAEFER G.H., RICE E. and BOEHLER Y.

Abstract (from CDS):

We report new dynamical masses for five pre-main sequence (PMS) stars in the L1495 region of the Taurus star-forming region (SFR) and six in the L1688 region of the Ophiuchus SFR. Since these regions have VLBA parallaxes, these are absolute measurements of the stars' masses and are independent of their effective temperatures and luminosities. Seven of the stars have masses 0.6M☉, thus providing data in a mass range with little data, and of these, six are measured to precision 5 % . We find eight stars with masses in the range 0.09-1.1 M☉ that agree well with the current generation of PMS evolutionary models. The ages of the stars we measured in the Taurus SFR are in the range 1-3 Myr, and 1 Myr for those in L1688. We also measured the dynamical masses of 14 stars in the ALMA archival data for Akeson & Jensen's Cycle 0 project on binaries in the Taurus SFR. We find that the masses of seven of the targets are so large that they cannot be reconciled with reported values of their luminosity and effective temperature. We suggest that these targets are themselves binaries or triples.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: pre-main sequence - techniques: interferometric - techniques: interferometric

Simbad objects: 52

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Number of rows : 52
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 NAME Heart Nebula HII 02 32.7 +61 27           ~ 336 1
2 V* FM Tau Or* 04 14 13.5841955640 +28 12 49.168982592 14.44   13.80 13.64   M0/2e 227 0
3 V* FN Tau TT* 04 14 14.5945463760 +28 27 58.067731188     14.70 13.68   M5e 178 0
4 [BCG93] 1 TT* 04 14 17.6095515480 +28 06 09.654704388 18.04         M4.5 126 0
5 [BHS98] MHO 1 TT* 04 14 26.2681279416 +28 06 03.270677040           ~ 49 1
6 [BHS98] MHO 2 TT* 04 14 26.4009435600 +28 05 59.635905324           M2.5 64 1
7 V* FP Tau Or* 04 14 47.3033083488 +26 46 26.414391720 17.21 16.14 15.02     M4Ve 189 0
8 V* CX Tau Or* 04 14 47.8615248984 +26 48 11.014877916 16.48 15.93 14.50     M1.5Ve 217 0
9 V* CY Tau Or* 04 17 33.7284990744 +28 20 46.812121656 14.52 14.68 13.40 12.59   M1.5 297 0
10 IRAS F04147+2822 TT* 04 17 49.6577031384 +28 29 36.318234912           M3.7 89 0
11 LDN 1495 DNe 04 18.1 +27 37           ~ 408 1
12 V* IP Tau Or* 04 24 57.0824018640 +27 11 56.539953888   14.50   12.46   M0:Ve 265 0
13 V* FV Tau Or* 04 26 53.5368775848 +26 06 54.276020136 19.58     15.26   K5 142 2
14 V* IQ Tau Or* 04 29 51.5569574040 +26 06 44.859710736 15.43   13.80 12.28 11.11 M0.5 281 0
15 V* FX Tau Or* 04 30 29.618064 +24 26 45.02724   15.18 13.61 13.21   M4 166 0
16 V* DK Tau A Or* 04 30 44.2408811328 +26 01 24.734232948           K5Ve 271 0
17 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 350 0
18 V* DK Tau B Or* 04 30 44.3938465800 +26 01 23.599254720           K7e 37 0
19 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
20 V* HK Tau TT* 04 31 50.5715875272 +24 24 17.775307548 16.81 16.689 15.292     M0.5 358 1
21 V* HK Tau B TT* 04 31 50.6002481212 +24 24 15.502558869           ~ 95 0
22 V* V710 Tau Or* 04 31 57.79839 +18 21 36.9408           M4 167 0
23 V* V710 Tau A TT* 04 31 57.8028713880 +18 21 34.732161936       13.87   M2/3e 177 0
24 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
25 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 283 0
26 V* GH Tau Or* 04 33 06.2186830512 +24 09 33.584489856     13.20 12.59   M3Ve 197 0
27 V* GK Tau Or* 04 33 34.5630097872 +24 21 05.855136732 15.50   13.00 12.02 10.62 K7:Ve 338 0
28 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
29 V* HN Tau Or* 04 33 39.3629421552 +17 51 52.289234280   14.76 13.40 13.05   K5e 271 0
30 V* DM Tau Or* 04 33 48.7336763736 +18 10 09.973460280 14.30 14.82 14.00     M2Ve 731 0
31 V* CI Tau Or* 04 33 52.0143963264 +22 50 30.094090908 14.97 15.09 13.80     K4IVe 422 1
32 V* IT Tau B Or* 04 33 54.5852814192 +26 13 25.780453824           M4 24 0
33 V* HO Tau Or* 04 35 20.2104968376 +22 32 14.561379276     15.20     M0.5 144 0
34 CoKu Tau-Aur Star 3 TT* 04 35 40.937952 +24 11 08.49012 20.58         M4.3 113 0
35 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
36 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 792 1
37 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
38 V* GO Tau Or* 04 43 03.0761840904 +25 20 18.706850340   16.2 14.40     M2.3 229 0
39 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
40 V* GM Aur Or* 04 55 10.9815576936 +30 21 59.373771876 14.59 13.351 12.242 11.798   K3Ve 797 0
41 LDN 1517 DNe 04 55 45 +30 33.0           ~ 127 0
42 IRAS 05022+2527 TT* 05 05 22.8194200200 +25 31 30.819373752   17.71 16.26     M4.6 77 0
43 GSS 26 Y*O 16 26 10.33152 -24 20 54.8232           M0 94 1
44 GSS 39 Or* 16 26 45.0318401664 -24 23 07.793180124           M0 255 1
45 WL 18 TT* 16 26 48.9809680488 -24 38 25.152593208       19.33 17.38 M3.5 77 0
46 WL 14 Or* 16 26 59.04984 -24 35 56.8788           ~ 53 0
47 YLW 16C Or* 16 27 26.48952 -24 39 23.0760           M1 56 0
48 [GY92] 284 TT* 16 27 30.8467391952 -24 24 56.094396228       18.45 16.24 M3.25 56 0
49 YLW 18 TT* 16 27 33.1157754648 -24 41 15.259932924       17.66 15.65 K5-K6 88 0
50 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
51 BKLT J162813-243139 Y*O 16 28 13.6972712208 -24 31 39.845643564           ~ 79 0
52 YLW 58 TT* 16 28 16.5129208176 -24 36 58.054939128   18.5   16.55 14.46 M4 119 0

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