Okay; read the news article though not the technical piece. There’s a lot of wiggle room between the smallest orbit we have imaged, and the event horizon for a BH at the calibrated mass. That leaves plenty of room to custom-fit some dark matter model to make a compact object that is larger than the event horizon.
Main question is: is there any good reason to do this? More precise refinement questions include: Is the compression of the halo tail somehow required to lead to the proposed dense core? If not, one could just propose some fermionic matter for the halo and not try to hack together a curve-fit for an object in the core. Other main question would be: what about galactic jets. We have some version of an image, and lots of data for the jet, in M87. Do you grab enough magnetic field, and generate the kind and concentration of rotation, to produce jets of the kind routinely observed, from these proposed compact dark-star galactic cores? If a coherent society lasts long enough to put up the orbiting LISA interferometer — supposing that the wavelength sensitivity is enough to read gravitational-wave radiation from supermassive BH collisions, which I haven’t done the homework to check — collisions leading to supermassive BHs would be unfakeable from non-horizon-forming compact objects. I don’t know if those or the photon rings are easier observational targets. I guess one could ask about how much can be tomographed from the correlation analysis of pulsars, which can respond to _very_ large and very slow GW backgrounds. Don’t know if that is enough to declare an agreement with the frequency of expected coalescences, depending on models for galactic center BH formation. Eric > On Feb 24, 2026, at 17:16, Russell Standish <[email protected]> wrote: > > Maybe a naive response, but isn't a star composed of compressed > fermionic particles otherwise known as a white dwarf? And if the > electrons and protons overcome Coulombic force to combine to form pure > neutronium (also fermionic particles), then its called a neutron > star? If I remember correctly from my astrophysics course some 4 > decades ago. > > On Sun, Feb 22, 2026 at 09:35:46AM -0700, Owen Densmore wrote: >> The SMBH (Super Massive Black Hole) conjectured to be at the center of most >> galaxies may not be black holes, but a highly compressed cloud of fermionic >> particles. These particles are those like the electron that obey the >> exclusion >> principle, i.e. cannot have the same the same quantum state as their >> neighbors. Abs Fab!! >> >> https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fwww.sci.news%2fastronomy%2f&c=E,1,Q4qUwJN-9ASkmROQmpY6JR4naMhtnmTxzb6rRpDsBQHmohNsDckooVAyZ5xnRloqvf9EM2l5XdHol_JPHfSZtupT2Lq9mmsA_xhpzxRhekghRwv9pYU,&typo=1 >> milky-ways-compact-object-fermionic-dark-matter-14537.html >> >> This, like the string theoretic version of black holes, gets rid of the >> singularity of classical black hole model. This is huge in that rather than >> an >> event horizon and a singularity at the center for black holes, and no >> structure >> in between, both string theory and the fermionic model have internal >> structure >> and can be applied by modern physics. 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