{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["12(2)"],"submitter":["Huang Y"],"pubmed_abstract":["The existence of intermediate-mass black holes (IMBHs) is crucial for understanding various astrophysical phenomena, yet their existence remains elusive, except for the LIGO-Virgo detection. We report the discovery of a high-velocity star J0731+3717, whose backward trajectory about 21 Myr ago intersected that of globular cluster M15 within the cluster tidal radius. Both its metallicity [Fe/H] and alpha-to-iron abundance ratio [[Formula: see text]/Fe] are consistent with those of M15. Furthermore, its location falls right on the fiducial sequence of cluster M15 on the color-absolute magnitude diagram, suggesting similar ages. These findings support the notion that J0731+3717 was originally associated with M15 at a confidence level of 'seven nines'. We find that such a high-velocity star ([Formula: see text] km s[Formula: see text]) was most likely tidally ejected from as close as one astronomical unit to the center of M15, confirming an IMBH ([Formula: see text] with a credibility of 98%) as the exclusive nature of the central unseen mass proposed previously."],"journal":["National science review"],"pagination":["nwae347"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC11809261"],"repository":["biostudies-literature"],"pubmed_title":["A high-velocity star recently ejected by an intermediate-mass black hole in M15."],"pmcid":["PMC11809261"],"pubmed_authors":["Liu J","Huang Y","Du C","Dong X","Lu Y","Zhang H","Li Q"],"additional_accession":[]},"is_claimable":false,"name":"A high-velocity star recently ejected by an intermediate-mass black hole in M15.","description":"The existence of intermediate-mass black holes (IMBHs) is crucial for understanding various astrophysical phenomena, yet their existence remains elusive, except for the LIGO-Virgo detection. We report the discovery of a high-velocity star J0731+3717, whose backward trajectory about 21 Myr ago intersected that of globular cluster M15 within the cluster tidal radius. Both its metallicity [Fe/H] and alpha-to-iron abundance ratio [[Formula: see text]/Fe] are consistent with those of M15. Furthermore, its location falls right on the fiducial sequence of cluster M15 on the color-absolute magnitude diagram, suggesting similar ages. These findings support the notion that J0731+3717 was originally associated with M15 at a confidence level of 'seven nines'. We find that such a high-velocity star ([Formula: see text] km s[Formula: see text]) was most likely tidally ejected from as close as one astronomical unit to the center of M15, confirming an IMBH ([Formula: see text] with a credibility of 98%) as the exclusive nature of the central unseen mass proposed previously.","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Feb","modification":"2025-04-04T11:58:46.574Z","creation":"2025-04-04T11:58:46.574Z"},"accession":"S-EPMC11809261","cross_references":{"pubmed":["39931145"],"doi":["10.1093/nsr/nwae347"]}}