International Journal of Modern Physics E Vol. 16, No. 9 (2007) 2847–2850 c  World Scientific Publishing Company CONSTRAINTS ON THE HYPERON-SIGMA MESON COUPLING BY GW OBSERVATIONS GUILHERME F. MARRANGHELLO Universidade Federal do Pampa Av. Carlos Barbosa s/n, 96412-420, Bag´ e/RS, Brazil gfrederico.unipampa@ufpel.edu.br MOIS ´ ES RAZEIRA Universiade Federal do Rio Grande do Sul Av. Bento Gon¸ calves 9500, 91501-970, Porto Alegre/RS, Brazil razeira@if.ufrgs.br BARDO BODMANN Universiade Federal do Rio Grande do Sul Av. Osvaldo Aranha 99, 90035-190, Porto Alegre/RS, Brazil bardo@ufrgs.br JOS ´ E C. N. DE ARAUJO Instituto Nacional de Pesquisas Espaciais Av. dos Astronautas 1758, 12227-010, S˜ao Jos´ e dos Campos/SP, Brazil jcarlos@das.inpe.br Received 24 May 2007 Revised 5 June 2007 Accepted 18 June 2007 The next generation of gravitational wave observatories are promissing candidates to make the first detections. Once the detection occurs the GW characteristics permit to extract some information about the gravitational wave source. In the present work we focus on waves produced by neutron stars which can give stringent constraints on the nuclear matter equation of state. The microscopic description is based on a non- linear field-theoretical model in order to construct such an equation of state. The model has free parameters, which from actual knowledge may not be pinned down by direct nuclear matter experiments. An important example is the hyperon-sigma meson coupling constant, currently determined by the spin-isospin SU(6) scheme. The coupling constant is of significant relevance for the structure of the equation of state, controlling its rigidity and, consequently, the properties of neutron stars and gravitational wave signals. We show, in this work, how one can constrain the hyperon-sigma meson coupling constant assuming the detection of a gravitational wave. 2847