2002/10/31 by Valeria Ferrari, Giovanni Miniutti, G. Miniutti +2 · 5 citations
Earth and Planetary Sciences · Physics and Astronomy · #Gamma-ray bursts and supernovae #Pulsars and Gravitational Waves Research #Seismic Waves and Analysis #astro-ph #gr-qc
paper · pdf · doi:10.1046/j.1365-8711.2003.06580.x
published as Mon.Not.Roy.Astron.Soc.342:629,2003 · Minor changes in Section 4.1, Table 3 and Figure 5. Accepted for publication in MNRAS
arxiv created 2003/03/02 · openalex publication_date 2003/06/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the gravitational radiation associated with the non-radial oscillations of newly born, hot neutron stars. The frequencies and damping times of the relevant quasi-normal modes are computed for two different models of a proto-neutron star, at different times of evolution, from its birth until it settles down as a cold neutron star. We find that the oscillation properties of proto-neutron stars are remarkably different from those of their cold, old descendants, and that this affects the characteristic features of the gravitational signal emitted during the post-collapse evolution. The consequences on the observability of these signals by resonant-mass and interferometric detectors are analysed. We find that gravitational waves from the pulsations of a newborn proto-neutron star in the Galaxy could be detected with a signal-to-noise ratio of 5 by the first-generation interferometers, if the energy stored in the modes is greater than ∼10−8 M⊙c2, or by a resonant antenna if it is greater than ∼10−4 M⊙c2. In addition, since at early times the frequency of the space–time modes is much lower than that of a cold neutron star, they would also be detectable with the same signal-to-noise ratio if a comparable amount of energy is radiated into these modes.