The aim of this theoretical and modelling paper is to derive knowledge on the global and structural parameters of low-mass stars using asteroseismology and taking advantage of the stellar collective behavior within open clusters .
We build stellar models and compute the seismic signal expected from main sequence objects in the 0.8 - 1.6 M _ { \sun } range .
We first evaluate apparent magnitudes and oscillations-induced luminosity fluctuations expected in the Hyades , the Pleiades and the \alpha Persei clusters .
The closest cluster presents a feasible challenge to observational asteroseismology in the present and near future .
The remainder of the work therefore focuses on the Hyades .

We combine seismological and classical computations to address three questions : what can be inferred about 1 ) mass , 2 ) composition and 3 ) extension of outer convection zones of solar analogs in the Hyades .
The first issue relies on the strong sensitivity of the large separation to mass .
We show that seismic constraints provide masses to a precision level ( 0.05 M _ { \sun } ) that is competitive with the actual mass estimations from binary systems .
Then large separations ( \Delta \nu ) and second differences ( \delta _ { 2 } \nu ) are used to respectively constrain metal and helium fractions in the Hyades .
When plotted for several masses , the relation of effective temperature ( T _ { \mathrm { eff } } ) vs large separation ( \Delta \nu ) is found to be strongly dependent on the metal content .
Besides this the second difference main modulation is related to the second ionization of helium .
An accuracy in the helium mass fraction of 0.02 to 0.01 can be achieved provided mass and age are accurately known , which is the case for a few Hyades binary systems .
The second difference modulations are also partly due to the discontinuity in stellar stratification at the convective envelope / radiative core transition .
They permit direct insight in the stellar structure .
We compute acoustic radii of the convective bases for different values of the mixing length theory parameter \alpha _ { \mathrm { MLT } } in convection modelling , i.e .
different convective efficiency in the superadiabatic layers .
For a given effective temperature we show that the acoustic radius changes with convection efficiency .
This suggests that seismology can provide constraints on the extension of outer convection and also more generally on the direct approaches of convection and dynamical phenomena being currently developed .