@article{
 title = {CORE DEPLETION FROM COALESCING SUPERMASSIVE BLACK HOLES Alister W. Graham 1},
 type = {article},
 year = {2004},
 pages = {33-36},
 volume = {613},
 id = {3f2b2e0e-fcba-39da-9c21-658b455d5194},
 created = {2017-04-01T02:54:39.761Z},
 file_attached = {true},
 profile_id = {d9ca9665-cda3-3617-b3e8-ecfc7a8d9739},
 group_id = {5a95a0b6-1946-397c-b16a-114c6fdf3127},
 last_modified = {2017-04-04T20:13:21.137Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 citation_key = {Graham2004},
 folder_uuids = {5cebd862-8031-4107-83be-d95baa57e832},
 private_publication = {false},
 abstract = {New measurements of the stellar-mass deficits at the centers of luminous elliptical galaxies are presented. These were derived considering the following observational facts. First, “core” galaxies, which are thought to have had their inner region depleted from the coalescence of supermassive black holes, show an abrupt downward deviation of their inner light profile relative to their outer Se ́rsic profile. Second, “power-law” galaxies, having undisturbed profiles and no partially depleted core, have inner light profiles that display no departure from the inward extrapolation of their outer Se ́rsic profile. The central stellar deficits have therefore been derived from the difference in flux between the Hubble Space Telescope observed galaxy light profiles and the inward extrapolation of each galaxy’s outer Se ́rsic profile. This approach gives flux deficits ∼ 0.1% of the total galaxy light and mass deficits that are ∼ 2 times each galaxy’s central supermassive black hole mass. These results are in agreement with the theoretical expectations of mass ejection from binary black hole mergers and also with popular L CDM models of hierarchical galaxy formation. It is also explained why this result is some 10 times smaller than current observational estimates of the central mass deficit and therefore implies a merger history for giant elliptical galaxies that is 1 order of magnitude less violent than previously suggested.},
 bibtype = {article},
 author = {Graham, Alister W.},
 journal = {The Astrophysical Journal Letters}
}

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