Rotation and magnetic activity of the Hertzsprung-gap giant 31 Comae

Home

All issues

Volume 520 (September-October 2010)

A&A, 520 (2010) A52

Full HTML

Free Access

Table 5:

Astrophysical properties of 31 Comae.
Parameter	Value	Based on
V₀, mag	4 $.\!\!^{\rm m}$ 935	APT V photometry
Distance, pc	89.1 ^+1.9_-1.7	revised Hipparcos
M_V	$+0\hbox{$.\!\!^{\rm m}$ }19\pm0.05$	from V₀ and distance
Classification, MK	G0III	Gray et al. (2001a)
Temperature, K	5810	Gray et al. (2001a)
	$5660 \pm 42$	STELLA spectra
Radius, $R_\odot$	$8.74 \pm 1.1$	angular diameter
Minimum radius, $R_\odot$	$8.95 \pm 0.27$	from $P_{\rm rot}$ & $v \sin i$
Luminosity, $L_\odot$	$73.2 \pm 4$	from M_V and B.C.
	$77.7 \pm 13$	from R and $T_{\rm eff}$
Gravity, cgs	3.42	Gray et al. (2001a)
	$3.51 \pm 0.09$	STELLA spectra
Mass, $M_\odot$	$2.6 \pm 0.1$	evolutionary tracks
Age, Myr	540⁺²⁴_-21	isochrone fitting
Metallicity, [M/H]	-0.21	Gray et al. (2001a)
	-0.17	GC, Strömgren phot.
	- $0.15\pm0.03$	STELLA spectra
Li abundance, H=12	$3.0 \pm 0.15$	STELLA spectra
Average RV, km s^-1	+ $0.10\pm$ 0.33	STELLA spectra
$v \sin i$ , km s^-1	$67 \pm 2$	STELLA spectra
Rotation period, days	$6.80 \pm 0.06$	MOST photometry
	$7.04 \pm 0.12$	APT y photometry
	$6.76 \pm 0.02$	STELLA radial velocity
Inclination, deg	$\approx$ 80	adopted

Notes. Values not cited in the third column were obtained in this paper. GC=Geneva-Copenhagen survey.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.