{"work":{"id":"45d14a65-1908-4e4e-87ab-62e0e9c7d4a8","openalex_id":null,"doi":null,"arxiv_id":"0801.0307","raw_key":null,"title":"TOPICAL REVIEW: General relativistic boson stars","authors":null,"authors_text":"F","year":2008,"venue":"astro-ph","abstract":"There is accumulating evidence that (fundamental) scalar fields may exist in Nature. The gravitational collapse of such a boson cloud would lead to a boson star (BS) as a new type of a compact object. Similarly as for white dwarfs and neutron stars, there exists a limiting mass, below which a BS is stable against complete gravitational collapse to a black hole. According to the form of the self-interaction of the basic constituents and the spacetime symmetry, we can distinguish mini-, axidilaton, soliton, charged, oscillating and rotating BSs. Their compactness prevents a Newtonian approximation, however, modifications of general relativity, as in the case of Jordan-Brans-Dicke theory as a low energy limit of strings, would provide them with gravitational memory. In general, a BS is a compact, completely regular configuration with structured layers due to the anisotropy of scalar matter, an exponentially decreasing 'halo', a critical mass inversely proportional to constituent mass, an effective radius, and a large particle number. Due to the Heisenberg principle, there exists a completely stable branch, and as a coherent state, it allows for rotating solutions with quantised angular momentum. In this review, we concentrate on the fascinating possibilities of detecting the various subtypes of (excited) BSs: Possible signals include gravitational redshift and (micro-)lensing, emission of gravitational waves, or, in the case of a giant BS, its dark matter contribution to the rotation curves of galactic halos.","external_url":"https://arxiv.org/abs/0801.0307","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-05-23T16:53:12.940837+00:00","pith_arxiv_id":"0801.0307","created_at":"2026-05-10T10:14:09.274845+00:00","updated_at":"2026-06-05T21:23:00.469572+00:00","title_quality_ok":true,"display_title":"TOPICAL REVIEW: General relativistic boson stars","render_title":"TOPICAL REVIEW: General relativistic boson stars"},"hub":{"state":{"work_id":"45d14a65-1908-4e4e-87ab-62e0e9c7d4a8","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":12,"external_cited_by_count":null,"distinct_field_count":4,"first_pith_cited_at":"2019-04-10T18:00:05+00:00","last_pith_cited_at":"2026-05-20T08:27:12+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-06-06T23:41:25.900276+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":3}],"polarity_counts":[{"context_polarity":"background","n":3}],"runs":{},"summary":{},"graph":{},"authors":[]}}