Cosmos:elementary | What if black holes don’t exist? Alternatives to black holes. @Cosmos_elementary | Uploaded June 2022 | Updated October 2024, 6 hours ago.
Black holes are commonly accepted to be real, but what if they are not? What are alternatives to black holes? And what problems are those alternative theories trying to solve?
My video on why we think black holes exist
youtube.com/watch?v=G04QFPUsyZ0
My video on information loss paradox
youtube.com/watch?v=LaRgY7tMDM4
Sources
Black hole formation
arxiv.org/ftp/arxiv/papers/1609/1609.08411.pdf
mcdonaldobservatory.org/news/gallery/neutron-stars-merge-form-black-hole
Semiclassical gravity
phys.org/news/2013-05-semiclassical-gravity-counterintuitive-horizon-testability.html
Alternatives
skyandtelescope.org/astronomy-news/physicist-proposes-new-black-hole-alternative
science.org/doi/10.1126/science.371.6525.118
https://cds.cern.ch/record/2663096/files/1902.07990.pdf
Black star
arxiv.org/pdf/0712.1130.pdf
https://physics.ucf.edu/~britt/AST2002/R9-Barcelo-Black%20stars,%20not%20holes.pdf
Dark Energy
science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy
earthsky.org/space/definition-what-is-dark-energy
Dark-energy star
arxiv.org/ftp/astro-ph/papers/0503/0503200.pdf
nature.com/articles/news050328-8
nautil.us/blog/are-black-holes-actually-dark-energy-stars
sciencedirect.com/science/article/abs/pii/S2212686421001096
https://www.slac.stanford.edu/econf/C041213/papers/0205.PDF
arxiv.org/pdf/2103.15393.pdf
Gravastar
worldscientific.com/doi/abs/10.1142/S0218271820300049
arxiv.org/abs/2010.05354
arxiv.org/abs/0706.1513
futurism.com/the-gravastar-an-alternative-to-black-holes
scientificamerican.com/article/black-hole-pretenders-could-really-be-bizarre-quantum-stars/#
Planck star
arxiv.org/pdf/1401.6562.pdf
interestingengineering.com/a-black-holes-core-could-be-a-strange-planck-star
futurism.com/what-are-planck-stars-how-do-they-differ-from-black-holes
phys.org/news/2014-02-astrophysicists-duo-planck-star-core.html
https://astronomy.swin.edu.au/cosmos/p/Planck+Length
Fuzzballs
quantamagazine.org/how-fuzzballs-solve-the-black-hole-firewall-paradox-20150623
livescience.com/string-theory-fuzzballs-are-black-holes.html
Q-star (Grey hole)
arxiv.org/pdf/astro-ph/9708065.pdf
arxiv.org/pdf/astro-ph/0207270.pdf
Boson stars
sciencealert.com/there-could-be-transparent-stars-made-of-bosons-masquerading-as-black-holes
Black holes are commonly accepted to be real, but what if they are not? What are alternatives to black holes? And what problems are those alternative theories trying to solve?
My video on why we think black holes exist
youtube.com/watch?v=G04QFPUsyZ0
My video on information loss paradox
youtube.com/watch?v=LaRgY7tMDM4
Sources
Black hole formation
arxiv.org/ftp/arxiv/papers/1609/1609.08411.pdf
mcdonaldobservatory.org/news/gallery/neutron-stars-merge-form-black-hole
Semiclassical gravity
phys.org/news/2013-05-semiclassical-gravity-counterintuitive-horizon-testability.html
Alternatives
skyandtelescope.org/astronomy-news/physicist-proposes-new-black-hole-alternative
science.org/doi/10.1126/science.371.6525.118
https://cds.cern.ch/record/2663096/files/1902.07990.pdf
Black star
arxiv.org/pdf/0712.1130.pdf
https://physics.ucf.edu/~britt/AST2002/R9-Barcelo-Black%20stars,%20not%20holes.pdf
Dark Energy
science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy
earthsky.org/space/definition-what-is-dark-energy
Dark-energy star
arxiv.org/ftp/astro-ph/papers/0503/0503200.pdf
nature.com/articles/news050328-8
nautil.us/blog/are-black-holes-actually-dark-energy-stars
sciencedirect.com/science/article/abs/pii/S2212686421001096
https://www.slac.stanford.edu/econf/C041213/papers/0205.PDF
arxiv.org/pdf/2103.15393.pdf
Gravastar
worldscientific.com/doi/abs/10.1142/S0218271820300049
arxiv.org/abs/2010.05354
arxiv.org/abs/0706.1513
futurism.com/the-gravastar-an-alternative-to-black-holes
scientificamerican.com/article/black-hole-pretenders-could-really-be-bizarre-quantum-stars/#
Planck star
arxiv.org/pdf/1401.6562.pdf
interestingengineering.com/a-black-holes-core-could-be-a-strange-planck-star
futurism.com/what-are-planck-stars-how-do-they-differ-from-black-holes
phys.org/news/2014-02-astrophysicists-duo-planck-star-core.html
https://astronomy.swin.edu.au/cosmos/p/Planck+Length
Fuzzballs
quantamagazine.org/how-fuzzballs-solve-the-black-hole-firewall-paradox-20150623
livescience.com/string-theory-fuzzballs-are-black-holes.html
Q-star (Grey hole)
arxiv.org/pdf/astro-ph/9708065.pdf
arxiv.org/pdf/astro-ph/0207270.pdf
Boson stars
sciencealert.com/there-could-be-transparent-stars-made-of-bosons-masquerading-as-black-holes
