{"corpus_id":15155831,"paper_sha":"032c5ca1b74e1e012769728b581b0ccbb78e871d","doi":"10.1086/305086","arxiv_id":"astro-ph/9608058","pmid":null,"pmcid":null,"mag_id":2069147259,"dblp_id":null,"acl_id":null,"title":"Formation of Low-Mass X-Ray Binaries. III. A New Formation Mechanism: Direct Supernova","year":1996,"publication_date":"1996-08-11","venue":"","journal":{"name":"The Astrophysical Journal","pages":"368 - 374","volume":"493"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Physics"],"reference_count":23,"citation_count":29,"influential_citation_count":0,"is_open_access":true,"arxiv_categories":["astro-ph"],"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":"https://iopscience.iop.org/article/10.1086/305086/pdf","s2_open_access_landing_url":"https://www.semanticscholar.org/paper/032c5ca1b74e1e012769728b581b0ccbb78e871d","s2_open_access_license":null,"s2_open_access_status":"BRONZE","pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"We propose a new formation mechanism (direct-supernova) for low-mass X-ray binaries (LMXBs) that does not involve any prior phase of mass transfer. Survival through the supernova (SN) explosion and shrinkage of the orbit is achieved by a kick velocity of appropriate magnitude and direction imparted to the neutron star at its birth. We present analytical population synthesis calculations of LMXBs forming via both the direct-SN and the helium star SN mechanisms and compare the results. We find that the direct-SN channel contributes a nonnegligible fraction of the total LMXB population, depending strongly on the rms magnitude of the kick velocity. More importantly, the direct-SN mechanism provides a natural way for the formation of low-mass binary pulsars in nearly circular orbits with orbital periods in excess of ~100d, which cannot have been formed via the helium star SN mechanism.","claims":[{"public_id":"cl_55c59c845748ffffec615694436bf5b4","status":"active","text":"A direct-supernova formation channel can produce low-mass X-ray binaries without any prior mass-transfer phase.","confidence":0.98,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_55c59c845748ffffec615694436bf5b4"},{"public_id":"cl_245cf7e284c7a88a8a67c886b65a53c2","status":"active","text":"Survival of the supernova explosion and orbital shrinkage are achieved by a natal kick imparted to the neutron star with suitable magnitude and direction.","confidence":0.96,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_245cf7e284c7a88a8a67c886b65a53c2"},{"public_id":"cl_c0a90c377febddd75f3cba409fe51a79","status":"active","text":"The direct-SN channel contributes a nonnegligible fraction of the total low-mass X-ray binary population, and this contribution depends strongly on the rms kick velocity.","confidence":0.95,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_c0a90c377febddd75f3cba409fe51a79"},{"public_id":"cl_f692dd2e69ea5bc4d96ad7c01cf7be94","status":"active","text":"The direct-SN mechanism naturally forms low-mass binary pulsars in nearly circular orbits with orbital periods longer than about 100 days, which are not produced by the helium star SN mechanism.","confidence":0.97,"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/claims/cl_f692dd2e69ea5bc4d96ad7c01cf7be94"}],"concepts":[{"public_id":"co_1e1248b89202a39719d6694918a9ad3c","status":"active","name":"helium star SN mechanism","description":"A supernova-based formation pathway involving a helium star progenitor.","types":["formation mechanism"],"aliases":["helium star supernova mechanism"],"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"url":"https://sah.borca.ai/concepts/co_1e1248b89202a39719d6694918a9ad3c"},{"public_id":"co_2db3d2f9caf25009f2d5809d0ea77e64","status":"active","name":"mass transfer","description":"The exchange of matter between the stars in a binary system.","types":["astrophysical 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