Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object
Hawking radiation explicitly depends only on the black hole's total mass, charge and angular momentum. It is therefore generally believed that one cannot reconstruct the information about the initial mass distribution of an object that made the black hole. However, instead of looking at radiati...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2016-07-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269316301848 |
| _version_ | 1811327423068766208 |
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| author | De-Chang Dai Dejan Stojkovic |
| author_facet | De-Chang Dai Dejan Stojkovic |
| author_sort | De-Chang Dai |
| collection | DOAJ |
| description | Hawking radiation explicitly depends only on the black hole's total mass, charge and angular momentum. It is therefore generally believed that one cannot reconstruct the information about the initial mass distribution of an object that made the black hole. However, instead of looking at radiation from a static black hole, we can study the whole time-dependent process of the gravitational collapse, and pre-Hawking radiation which is excited because of the time-dependent metric. We compare radiation emitted by a single collapsing shell with that emitted by two concentric shells of the equivalent total mass. We calculate the gravitational trajectory and the momentum energy tensor. We show that the flux of energy emitted during the collapse by a single shell is significantly different from the flux emitted by two concentric shells of the equivalent total mass. When the static black hole is formed, the fluxes become indistinguishable. This implies that an observer studying the flux of particles from a collapsing object could in principle reconstruct information not only about the total mass of the collapsing object, but also about the mass distribution. |
| first_indexed | 2024-04-13T15:07:36Z |
| format | Article |
| id | doaj.art-4324194f73ea439eb9bed0f4aba605b3 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-04-13T15:07:36Z |
| publishDate | 2016-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-4324194f73ea439eb9bed0f4aba605b32022-12-22T02:42:07ZengElsevierPhysics Letters B0370-26931873-24452016-07-01758C42943310.1016/j.physletb.2016.05.037Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing objectDe-Chang Dai0Dejan Stojkovic1Institute of Natural Sciences, Shanghai Key Lab for Particle Physics and Cosmology, and Center for Astrophysics and Astronomy, Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, ChinaHEPCOS, Department of Physics, SUNY, University at Buffalo, Buffalo, NY 14260-1500, United StatesHawking radiation explicitly depends only on the black hole's total mass, charge and angular momentum. It is therefore generally believed that one cannot reconstruct the information about the initial mass distribution of an object that made the black hole. However, instead of looking at radiation from a static black hole, we can study the whole time-dependent process of the gravitational collapse, and pre-Hawking radiation which is excited because of the time-dependent metric. We compare radiation emitted by a single collapsing shell with that emitted by two concentric shells of the equivalent total mass. We calculate the gravitational trajectory and the momentum energy tensor. We show that the flux of energy emitted during the collapse by a single shell is significantly different from the flux emitted by two concentric shells of the equivalent total mass. When the static black hole is formed, the fluxes become indistinguishable. This implies that an observer studying the flux of particles from a collapsing object could in principle reconstruct information not only about the total mass of the collapsing object, but also about the mass distribution.http://www.sciencedirect.com/science/article/pii/S0370269316301848 |
| spellingShingle | De-Chang Dai Dejan Stojkovic Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object Physics Letters B |
| title | Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object |
| title_full | Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object |
| title_fullStr | Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object |
| title_full_unstemmed | Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object |
| title_short | Pre-Hawking radiation may allow for reconstruction of the mass distribution of the collapsing object |
| title_sort | pre hawking radiation may allow for reconstruction of the mass distribution of the collapsing object |
| url | http://www.sciencedirect.com/science/article/pii/S0370269316301848 |
| work_keys_str_mv | AT dechangdai prehawkingradiationmayallowforreconstructionofthemassdistributionofthecollapsingobject AT dejanstojkovic prehawkingradiationmayallowforreconstructionofthemassdistributionofthecollapsingobject |