ξTauri: a unique laboratory to study the dynamic interaction in a compact hierarchical quadruple system

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Volume 594 (October 2016)

A&A, 594 (2016) A55

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Table 1

Brief summary of orbital elements and properties of components of ξ Tau.

		Orbit
Quantity		1	2		3

P	(d)	7.14664	145.12		18 630
e		≲ 0.01	0.21		0.564
i	(deg)	86.8	86.6		−24.4
a	(R_⊙)	25.3	233		6097
Cpts.		Aa + Ab	A¹	+ B	AB² + C
Sp.T.		B9V + B9V		+ B5V		+ F5V³
m	(M_⊙)	2.25 + 2.13		+ 3.73		+ 0.92⁴
V	(mag)	5.46 + 5.53		+ 4.25		+ 7.55³

Notes. This table serves only for introductory purposes and does not present our final results. P denotes the orbital period, e the eccentricity, i the inclination, Cpts. are the components of an orbit, Sp.T. the spectral type, m the mass, and V the apparent magnitude in the Johnson V filter.

⁽¹⁾

A denotes the inner eclipsing system Aa+Ab.

⁽²⁾

AB denotes the intermediate system A+B.

⁽³⁾

Based on the magnitude difference listed in the Hipparcos and Tycho catalogue (ESA 1997).

⁽⁴⁾

The evident mismatch between the spectral type and its mass is due to the high uncertainty of both parameters.

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