Du, Xiaolong

[["dc.bibliographiccitation.artnumber","043519"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Physical Review D"],["dc.bibliographiccitation.volume","95"],["dc.contributor.author","Du, Xiaolong"],["dc.contributor.author","Behrens, Christoph"],["dc.contributor.author","Niemeyer, Jens C."],["dc.contributor.author","Schwabe, Bodo"],["dc.date.accessioned","2020-12-10T18:25:21Z"],["dc.date.available","2020-12-10T18:25:21Z"],["dc.date.issued","2017"],["dc.description.abstract","In the context of structure formation with ultralight axion dark matter, we offer an alternative explanation for the mass relation of solitonic cores and their host halos observed in numerical simulations. Our argument is based entirely on the mass gain that occurs during major mergers of binary cores and largely independent of the initial core-halo mass relation assigned to hosts that have just collapsed. We find a relation between the halo mass M-h and corresponding core mass M-c, M-c proportional to M-h(2 beta-1), where (1-beta) is the core mass loss fraction. Following the evolution of core masses in stochastic merger trees, we find empirical evidence for our model. Our results are useful for statistically modeling the effects of dark matter cores on the properties of galaxies and their substructures in axion dark matter cosmologies."],["dc.identifier.doi","10.1103/PhysRevD.95.043519"],["dc.identifier.eissn","2470-0029"],["dc.identifier.isi","000394663900007"],["dc.identifier.issn","2470-0010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75661"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","2470-0029"],["dc.relation.issn","2470-0010"],["dc.title","Core-halo mass relation of ultralight axion dark matter from merger history"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","941"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Monthly Notices of the Royal Astronomical Society"],["dc.bibliographiccitation.lastpage","951"],["dc.bibliographiccitation.volume","465"],["dc.contributor.author","Du, Xiaolong"],["dc.contributor.author","Behrens, Christoph"],["dc.contributor.author","Niemeyer, Jens C."],["dc.date.accessioned","2018-11-07T10:27:30Z"],["dc.date.accessioned","2020-07-20T07:56:31Z"],["dc.date.available","2018-11-07T10:27:30Z"],["dc.date.available","2020-07-20T07:56:31Z"],["dc.date.issued","2016"],["dc.description.abstract","We derive the halo mass function (HMF) for fuzzy dark matter (FDM) by solving the excursion set problem explicitly with a mass-dependent barrier function, which has not been done before. We find that compared to the naive approach of the Sheth--Tormen HMF for FDM, our approach has a higher cut off mass and the cut off mass changes less strongly with redshifts. Using merger trees constructed with a modified version of the Lacey & Cole formalism that accounts for suppressed small scale power and the scale-dependent growth of FDM haloes and the semi-analytic GALACTICUS code, we study the statistics of halo substructure including the effects from dynamical friction and tidal stripping. We find that if the dark matter is a mixture of cold dark matter (CDM) and FDM, there will be a suppression on the halo substructure on small scales which may be able to solve the Missing Satellites Problem faced by the pure CDM model. The suppression becomes stronger with increasing FDM fraction or decreasing FDM mass. Thus, it may be used to constrain the FDM model."],["dc.description.sponsorship","China Scholarship Council (CSC)"],["dc.identifier.arxiv","1608.02575v2"],["dc.identifier.doi","10.1093/mnras/stw2724"],["dc.identifier.isi","000393782000064"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/67223"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.eissn","1365-2966"],["dc.relation.issn","0035-8711"],["dc.title","Substructure of fuzzy dark matter haloes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]