Hipparcos preliminary astrometric masses for the two close-in companions to HD 131664 and HD 43848 - A brown dwarf and a low-mass star

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Table 1:

Stellar characteristics of HD 131664 and HD 131664 and spectroscopic orbital elements for the two Doppler-detected companions.
Star name	Sp.T.	V	$\pi_\star$	d	$M_\star$	P	T₀	e	$\omega$	K	$M_{\rm c}\sin i$	a₁
		(mag)	(mas)	(pc)	( $M_{\odot }$ )	(d)	(JD-2 400 000)		(deg)	(m s^-1)	$(M_{\rm J})$	(AU)
HD 131664	G3V	8.13	18.04	55.43	1.10	1951	52060	0.638	149.7	359.5	18.15	3.17
					$\pm$ 0.03	$\pm$ 41	$\pm$ 41	$\pm$ 0.02	$\pm$ 1.0	$\pm$ 22.3	$\pm$ 0.35
HD 43848	G2V	8.65	26.99	37.05	0.89	2371	53227	0.690	229.0	544	25.0	3.40
						$\pm$ 840	$\pm$ 65	$\pm$ 0.12	$\pm$ 9.0	$\pm$ 200

Notes. Reported errors are from the discovery papers.

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