Astrophysical hints for magnetic black holes. (arXiv:2009.03363v2 [hep-ph] UPDATED)
<a href="http://arxiv.org/find/hep-ph/1/au:+Ghosh_D/0/1/0/all/0/1">Diptimoy Ghosh</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Thalapillil_A/0/1/0/all/0/1">Arun Thalapillil</a>, <a href="http://arxiv.org/find/hep-ph/1/au:+Ullah_F/0/1/0/all/0/1">Farman Ullah</a>
We discuss a cornucopia of potential astrophysical signatures and constraints
on magnetically charged black holes of various masses. As recently highlighted,
being potentially viable astrophysical candidates with immense electromagnetic
fields, they may be ideal windows to fundamental physics, electroweak symmetry
restoration and non-perturbative quantum field theoretic phenomena. We
investigate various potential astrophysical pointers and bounds—including
limits on charges, location of stable orbits and horizons in asymptotically
flat and asymptotically de Sitter backgrounds, bounds from galactic magnetic
fields and dark matter measurements, characteristic electromagnetic fluxes and
tell-tale gravitational wave emissions during binary inspirals. Stable orbits
around these objects hold an imprint of their nature and in the asymptotically
de Sitter case, there is also a qualitatively new feature with the emergence of
a stable outer orbit. We consider binary inspirals of both magnetic and
neutral, and magnetic and magnetic, black hole pairs. The electromagnetic
emissions and the gravitational waveform evolution, along with inter-black hole
separation, display distinct features. Many of the astrophysical signatures may
be observationally glaring—for instance, even in regions of parameter space
where no electroweak corona forms, owing to magnetic fields that are still many
orders of magnitude larger than even Magnetars, their consequent
electromagnetic emissions will be spectacular during binary inspirals. While
adding new results, our discussions also complement works in similar contexts,
that have appeared recently in the literature.
We discuss a cornucopia of potential astrophysical signatures and constraints
on magnetically charged black holes of various masses. As recently highlighted,
being potentially viable astrophysical candidates with immense electromagnetic
fields, they may be ideal windows to fundamental physics, electroweak symmetry
restoration and non-perturbative quantum field theoretic phenomena. We
investigate various potential astrophysical pointers and bounds—including
limits on charges, location of stable orbits and horizons in asymptotically
flat and asymptotically de Sitter backgrounds, bounds from galactic magnetic
fields and dark matter measurements, characteristic electromagnetic fluxes and
tell-tale gravitational wave emissions during binary inspirals. Stable orbits
around these objects hold an imprint of their nature and in the asymptotically
de Sitter case, there is also a qualitatively new feature with the emergence of
a stable outer orbit. We consider binary inspirals of both magnetic and
neutral, and magnetic and magnetic, black hole pairs. The electromagnetic
emissions and the gravitational waveform evolution, along with inter-black hole
separation, display distinct features. Many of the astrophysical signatures may
be observationally glaring—for instance, even in regions of parameter space
where no electroweak corona forms, owing to magnetic fields that are still many
orders of magnitude larger than even Magnetars, their consequent
electromagnetic emissions will be spectacular during binary inspirals. While
adding new results, our discussions also complement works in similar contexts,
that have appeared recently in the literature.
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