Punctum: The Point in NGC 4945 That Breaks the Mold

A Deep Dive into punctum, a mysterious ultra-compact millimeter source found in the nearby galaxy NGC 4945 by ALMA. With polarization around 50% and no counterparts at other wavelengths, punctum resists classification as any known astrophysical object, challenging our understanding of synchrotron emission and compact sources. We unpack what makes punctum so puzzling, how it compares to magnetars and other non-thermal sources, and why future polarization studies could unlock a new chapter in cosmic mysteries.

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