A planetary companion around the K giant ϵ Corona Borealis

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Table 1

Stellar parameters for ϵ CrB.

Parameter	Value	Reference


Spectral type	K2 III	Hipparcos
m_v [mag]	4.14	Hipparcos
B–V [mag]	1.23	Hipparcos
Age [Gyr]	1.74 ± 0.37^a	Derived
Distance [pc]	67.9	Shaya & Olling (2011)
RV [km s^-1]	–30.92	Massarotti et al. (2008)
Parallax [mas]	13.97 ± 0.68	Kharchenko et al. (2009)
Diameter [mas]	3.08 ± 0.16^b	Richichi & Percheron (2002)
T_eff [K]	4365 ± 9	Massarotti et al. (2008)
	4406 ± 15	This work
[Fe/H]	–0.32	Massarotti et al. (2008)
	–0.094 ± 0.001	This work
log g	2.3	Massarotti et al. (2008)
	1.94 ± 0.08	This work
R_⋆ [R_⊙]	21	Massarotti et al. (2008)
M_⋆ [M_⊙]	1.7 ± 0.1^a	Derived
L_⋆ [L_⊙]	151	Massarotti et al. (2008)
v_rot sin i [km s^-1]	2.4	Massarotti et al. (2008)
P_rot/sin i [days]	442.7	Derived
v_micro [km s^-1]	1.59 ± 0.07	This work

Notes. ).

^(a)

Derived using the online tool (http://stevoapd.inaf.it/cgi-bin/param

^(b)

Computed on the basis of a formula as described in method, and error is included whenever possible. The uniform disk angular diameter is 2.73 ± 0.03 mas, and the limb-darkened angular diameter is 2.80 ± 0.03 mas.

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