2014A&A...561A.101L


Query : 2014A&A...561A.101L

2014A&A...561A.101L - Astronomy and Astrophysics, volume 561A, 101-101 (2014/1-1)

Refined masses and distance of the young binary Haro 1-14 C.

LE BOUQUIN J.-B., MONIN J.-L., BERGER J.-P., PRATO L., BENISTY M. and SCHAEFER G.

Abstract (from CDS):

We aim to refine the dynamical masses of the individual component of the low-mass pre-main sequence binary Haro 1-14C. We combine the data of the preliminary orbit presented previously with new interferometric observations obtained with the four 8 m telescopes of the Very Large Telescope Interferometer. The derived masses are Ma=0.905±0.043M and Mb=0.308±0.011M for the primary and secondary components, respectively. This is about five times better than the uncertainties of the preliminary orbit. Moreover, the possibility of larger masses is now securely discarded. The new dynamical distance, d=96±9pc, is smaller than the distance to the Ophiuchus core with a significance of 2.6σ. Fitting the spectral energy distribution yields apparent diameters of φa=0.13±0.01 mas and φb=0.10±0.01 mas (corresponding to Ra=1.50R and Rb=1.13R) and a visual extinction of Av≃1.75. Although the revised orbit has a nearly edge-on geometry, the system is unlikely to be a long-period eclipsing binary. The secondary in Haro 1-14C is one of the few low-mass, pre-main sequence stars with an accurately determined dynamical mass and distance.

Abstract Copyright:

Journal keyword(s): binaries: close - stars: formation - techniques: interferometric

Simbad objects: 6

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Number of rows : 6
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 HD 147137 dS* 16 20 50.2312331112 -22 35 38.789976084   9.42 9.03   8.44 A9V 59 0
2 HD 147284 PM* 16 21 55.4381734872 -24 59 28.695923268   9.48 8.80     G3V 36 0
3 HD 147935 PM* 16 25 49.1895184752 -27 49 09.183621108   9.89 9.20     G5V 33 0
4 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3446 1
5 CoKu Haro 1-14 c Or* 16 31 04.3604585856 -24 04 33.304117764   13.76 12.35 12.14   K4IVe 29 0
6 Haro 1-14 Or* 16 31 05.1623543808 -24 04 40.307366316       14.04   ~ 50 0

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2023.02.02-19:09:43

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