Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28914
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Baumgardt, H. | en_US |
dc.contributor.author | He, C. | en_US |
dc.contributor.author | Sweet, S. M. | en_US |
dc.contributor.author | Drinkwater, M. | en_US |
dc.contributor.author | SOLLIMA, ANTONIO LUIGI | en_US |
dc.contributor.author | Hurley, J. | en_US |
dc.contributor.author | Usher, C. | en_US |
dc.contributor.author | Kamann, S. | en_US |
dc.contributor.author | Dalgleish, H. | en_US |
dc.contributor.author | Dreizler, S. | en_US |
dc.contributor.author | Husser, T. -O. | en_US |
dc.date.accessioned | 2020-12-17T11:08:05Z | - |
dc.date.available | 2020-12-17T11:08:05Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28914 | - |
dc.description.abstract | We compare the results of a large grid of N-body simulations with the surface brightness and velocity dispersion profiles of the globular clusters ω Cen and NGC 6624. Our models include clusters with varying stellar-mass black hole retention fractions and varying masses of a central intermediate-mass black hole (IMBH). We find that an ∼ 45 000 M<SUB>☉</SUB> IMBH, whose presence has been suggested based on the measured velocity dispersion profile of ω Cen, predicts the existence of about 20 fast-moving, m > 0.5 M<SUB>☉</SUB>, main-sequence stars with a (1D) velocity v > 60 km s<SUP>-1</SUP> in the central 20 arcsec of ω Cen. However, no such star is present in the HST/ACS proper motion catalogue of Bellini et al. (2017), strongly ruling out the presence of a massive IMBH in the core of ω Cen. Instead, we find that all available data can be fitted by a model that contains 4.6 per cent of the mass of ω Cen in a centrally concentrated cluster of stellar-mass black holes. We show that this mass fraction in stellar-mass BHs is compatible with the predictions of stellar evolution models of massive stars. We also compare our grid of N-body simulations with NGC 6624, a cluster recently claimed to harbour a 20 000 M<SUB>☉</SUB> black hole based on timing observations of millisecond pulsars. However, we find that models with M<SUB>IMBH</SUB> > 1000 M<SUB>☉</SUB> IMBHs are incompatible with the observed velocity dispersion and surface brightness profile of NGC 6624, ruling out the presence of a massive IMBH in this cluster. Models without an IMBH provide again an excellent fit to NGC 6624. | en_US |
dc.language.iso | eng | en_US |
dc.title | No evidence for intermediate-mass black holes in the globular clusters ω Cen and NGC 6624 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stz2060 | en_US |
dc.identifier.scopus | 2-s2.0-85080099273 | en_US |
dc.identifier.isi | 000484349700069 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/488/4/5340/5539719 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 488 | en_US |
dc.relation.issue | 4 | en_US |
dc.relation.firstpage | 5340 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 11 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | GBR | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | AUS | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019MNRAS.488.5340B | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0001-7484-8467 | - |
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