Table · dataset · 2023
No evidence for IMBHs in {omega} Cen/NGC6624
Listed in IVOA Registry (Virtual Observatory)
We compare the results of a large grid of N-body simulations with the surface brightness and velocity dispersion profiles of the globular clusters {omega} Cen and NGC 6624.
Description
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 ~45000M_{sun}_ IMBH, whose presence has been suggested based on the measured velocity dispersion profile of {omega} Cen, predicts the existence of about 20 fast-moving, m>0.5M_{sun}_, main-sequence stars with a (1D) velocity v>60km/s in the central 20arcsec of {omega} Cen.
However, no such star is present in the HST/ACS proper motion catalogue of Bellini et al. (2017ApJ...842....6B, Cat. J/ApJ/842/6), strongly ruling out the presence of a massive IMBH in the core of {omega} Cen. Instead, we find that all available data can be fitted by a model that contains 4.6 per cent of the mass of {omega} Cen in a centrally concentrated cluster of stellar-mass black holes.
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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 20000M_{sun}_ black hole based on timing observations of millisecond pulsars. However, we find that models with M_IMBH_>1000M_{sun}_ 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.
Links
Where it is published
- Reference page cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/488/5340 ↗
landing page · from IVOA Registry
Documentation and papers
- ADS 2019MNRAS.488.5340B ui.adsabs.harvard.edu/abs/2019MNRAS.488.5340B ↗
publication · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/cds.vizier/j/mnras/488/5340 ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- Infrared
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://cds.vizier/j/mnras/488/5340 | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:infrared | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| license_text | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |