Long-wavelength observations of debris discs around sun-like stars

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Table 2:

Ages (in logarithmic scale) of the debris discs detected at the millimetre wavelength, with IRAM (this work), SEST and OVRO (from C05). They have been derived using different techniques: the strength of the CaII H and K ( $R'_{\rm HK}$ ) and Lithium (Li) emission, X-ray activity (X-*ray*), and the rotational period-age ( $p_{\rm rot}$ ) relation (L. Hillenbrand, private communication). The ages are averaged and the standard deviation is adopted as error.
Method	HD 377	HD 8907	HD 104860	HD 107146
$R'_{\rm HK}$	8.34	8.78	8.44	8.09
$v \sin i$	7.99	8.1	-	8.89
$p_{\rm rot}$	-	-	7.62	-
X-ray	7.9	7.88	8.06	-
Li	7.8	9.28	8.08	8.1
average	8.01	8.51	8.05	8.36
stdev	0.23	0.64	0.34	0.46

Source LaTeX | All tables | In the text

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