Rua das Estrelas

2 months ago | academic.oup.com | Rua das Estrelas |Burnaby Road

Gravitational waves (GWs) have rapidly become important cosmological probes since their first detection in 2015. As the number of detected events continues to rise, upcoming instruments like Einstein Telescope (ET) and Cosmic Explorer (CE) will observe millions of compact binary (CB) mergers.

Dec 10, 2024 | academic.oup.com | Polish Academy |Cape Town |Rua das Estrelas

HD 60435 is a well-known rapidly oscillating (roAp) Ap star with a series of alternating even and odd degree modes, making it a prime asteroseismic target. It is also an oblique pulsator with rotational inclination, i, and magnetic/pulsation obliquity, β, such that both magnetic/pulsation poles are viewed over the rotation period, P = 7.679696 d, determined from rotational light variations.

Jul 24, 2024 | link.aps.org | Rua das Estrelas |Universidade do Porto

Cosmic string networks are the best motivated relics of cosmological phase transitions, being unavoidable in many physically plausible extensions of the Standard Model. Most studies, including those providing constraints from and forecasts of their observational signals, rely on assumptions of featureless networks, neglecting the additional degrees of freedom on the string worldsheet, e.g., charges and currents, which are all but unavoidable in physically realistic models.

Feb 9, 2024 | academic.oup.com | Rua das Estrelas

Dwarf galaxies are overwhelmingly the most numerous type of galaxy in the Universe, but due to their low luminosity, only the most luminous are detectable beyond the local Universe (Dale et al. 2009; McConnachie 2012). Typically, dwarfs have much smaller optical diameters, 0.1 to 10 kpc (de Vaucouleurs et al. 1991), and stellar masses, 107 to 109 M (Lee et al. 2006), than the more massive galaxies in the Hubble sequence.