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Pulsars could help weigh the Milky Way’s neighboring dwarf galaxies

A new study suggests that pulsars can act as cosmic accelerometers, revealing tiny gravitational disturbances caused by dwarf galaxies orbiting the Milky Way. The method could open a new way to weigh satellite galaxies and map dark matter around our galaxy.

Webb detecta metano en TOI-199 b, un exoplaneta gigante templado del tamaño de Saturno

El telescopio espacial James Webb analizó la atmósfera de TOI-199 b, un exoplaneta gigante templado del tamaño de Saturno. Las observaciones revelan una atmósfera rica en metano y abren una nueva ventana al estudio químico de mundos gaseosos más fríos que los Júpiteres calientes.

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    Active supermassive black holes can strip exoplanet atmospheres across entire galaxies

    A new study in The Astrophysical Journal led by Jourdan Waas shows that the supermassive black hole at the center of a galaxy can render exoplanets uninhabitable thousands of light-years away. When actively feeding, these black holes launch ultrafast outflows traveling at roughly one-tenth the speed of light, capable of heating planetary atmospheres, accelerating mass loss, and triggering near-complete ozone depletion across galactic scales. The effect scales with black hole mass: for supermassive black holes above one hundred million solar masses, ozone loss approaches 100% across most of the host galaxy, redrawing the boundaries of the galactic habitable zone and confining surface life to oceans, if it survives at all. 🌌🕳️🪐

    A symplectic Python integration of the Friedmann equations recovers the age of the Universe to within 0.1 per cent of Planck 2018

    European Journal of Physics, the journal of the Institute of Physics and the European Physical Society, publishes today a paper by a team affiliated with the Master's Programme in Astrophysics and Astronomy at UNIR, led by Homer Dávila Gutiérrez, FRAS. The work implements the Friedmann equations in Python using a symplectic Störmer-Verlet integrator and recovers the age of the Universe to within 0.1 per cent of the Planck 2018 value, while comparing seven distinct dark-energy regimes in a single integration framework. Open access.

    Estudio presenta siete futuros posibles del universo: del ΛCDM al Big Rip en un solo paper

    European Journal of Physics, la revista del Institute of Physics y la European Physical Society, publica hoy el paper "Numerical implementation of flat FLRW models of cosmic expansion with Planck 2018 cosmological parameters", firmado por un equipo del Máster en Astrofísica y Astronomía de UNIR. El código, implementado en Python con un integrador simpléctico Störmer-Verlet, recupera la edad del universo en 13,78 gigaaños con un error del 0,1 por ciento respecto al valor de Planck 2018, y compara siete escenarios físicos de expansión cósmica en una sola figura. Acceso abierto.

    JWST’s monster black holes finally have an explanation

    JWST keeps finding black holes far too massive for their host galaxies in the first billion years of cosmic history. A new study in The Astrophysical Journal Letters argues these overmassive black hole galaxies are the natural outcome of direct-collapse black hole seeds, paired with star formation suppressed by black hole feedback and Population III supernovae. UHZ1 and GHZ9 match the simulations.

    A new consistency test between BAO and supernovae weakens the case for evolving dark energy

    Hints from DESI DR2 suggested dark energy might be evolving with cosmic time. A new analysis published in Physical Review D applies a consistency test rooted in general relativity and finds the signal weakens once BAO and supernovae are forced to agree. 🔭✨ Too early to bury the cosmological constant.

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