2017ApJ...845..161A


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET17:47:28

2017ApJ...845..161A - Astrophys. J., 845, 161-161 (2017/August-3)

Properties of the closest young binaries. I. DF Tau's unequal circumstellar disk evolution.

ALLEN T.S., PRATO L., WRIGHT-GARBA N., SCHAEFER G., BIDDLE L.I., SKIFF B., AVILEZ I., MUZZIO R. and SIMON M.

Abstract (from CDS):

We present high-resolution, spatially resolved, near-infrared spectroscopy and imaging of the two components of DF Tau, a young, low-mass, visual binary in the Taurus star-forming region. With these data, we provide a more precise orbital solution for the system, determine component spectral types, radial velocity, veiling and vsini values, and construct individual spectral energy distributions. We estimate the masses of both stars to be ∼0.6 M. We find markedly different circumstellar properties for DF Tau A and B: evidence for a disk, such as near-infrared excess and accretion signatures, is clearly present for the primary, while it is absent for the secondary. Additionally, the vsini and rotation period measurements show that the secondary is rotating significantly more rapidly than the primary. We interpret these results in the framework of disk-locking and argue that DF Tau A is an example of disk-modulated rotation in a young system. The DF Tau system raises fundamental questions about our assumptions of universal disk formation and evolution.

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

Journal keyword(s): binaries: visual - stars: fundamental parameters - stars: individual: DF Tau - stars: pre-main sequence - stars: pre-main sequence

Simbad objects: 14

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Number of rows : 14

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* GX And Fl* 00 18 22.8849667932 +44 01 22.637271919   10.120   7.3   M2V 443 1
2 TYC 1820-176-1 * 04 26 37.1483986689 +25 42 38.779314170   12.64 11.35     ~ 1 0
3 V* DF Tau A * 04 27 02.79 +25 42 22.4     12.62     M2e 28 0
4 V* DF Tau B * 04 27 02.79 +25 42 22.4     13.51     M3.5e 19 0
5 V* DF Tau TT* 04 27 02.7917481241 +25 42 22.456361256 11.97 12.25 11.42 10.31 9.14 M3Ve 456 1
6 V* DN Tau TT* 04 35 27.3776240781 +24 14 58.908761629 13.56 12.88 11.50 11.79   M1:Ve 342 0
7 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3357 0
8 BD-21 1074 ** 05 06 49.92 -21 35 09.2           ~ 28 0
9 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1922 1
10 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1440 1
11 * alf Car * 06 23 57.10988 -52 41 44.3810 -0.49 -0.59 -0.74 -0.96 -1.13 A9II 415 0
12 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 532 0
13 HD 180617 BY* 19 16 55.2565250393 +05 10 08.038856129 11.768 10.63 9.115 8.076 6.782 M3-V 341 0
14 HD 184489 PM* 19 34 39.8401601365 +04 34 57.048681854 11.917 10.707 9.326 8.475 7.7 M0V 104 0

    Equat.    Gal    SGal    Ecl

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2020.01.21-17:47:28

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