Misterio cósmico resuelto: la estructura que confundió a la astrofísica durante 40 años

For four decades, a mysterious structure known as the Galactic Center Lobe (GCL) has puzzled astronomers, often interpreted as evidence of a cataclysmic eruption at the heart of the Milky Way. Theories ranged from chain supernovae remnants to violent outbursts from Sagittarius A*, the supermassive black hole at our galaxy's center. However, a recent study published in Astronomy & Astrophysics has debunked these long-held assumptions, revealing the GCL to be a sophisticated interstellar illusion.

The research, spearheaded by astrophysicist Kathryn Kreckel of Heidelberg University, employed a novel observational strategy. Previous attempts to understand the GCL were akin to a scientific Rorschach test, with interpretations heavily influenced by individual theories and available data. The complexity of the galactic center, a dense region of stars, gas, and dust, acted as a visual screen, creating misleading connections between distant objects.

The breakthrough came from utilizing data from the SDSS-V Local Volume Mapper project, which provided an exceptionally detailed map of glowing gas. Kreckel's team used the emission of ionized sulfur, with its longer, redder wavelength, to penetrate the dense interstellar dust. This allowed them to see through the obscuring material and identify the GCL's lower part as a completely closed bubble, a feature previously hidden in radio observations.

By comparing the light-attenuating dust with detailed 3D galaxy maps, the team recalculated the structure's location. It is now understood to be approximately 6,520 light-years from Earth, significantly closer than the previously estimated 26,000 light-years to the galactic center. This correction drastically reduces its diameter to 115 light-years, far too small to be a remnant of a massive galactic core eruption. The researchers ironically proposed renaming it the "Greatly Confusing Loop," acknowledging the "40-year struggle to separate genuine nuclear features from foreground galactic disk features."

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a struggle of 40 years to separate genuine nuclear features from foreground galactic disk features.