| Proposal ID | 084514 |
| Title | Do massive BHs really reside in the nuclei of ultra-compact dwarf galaxies? |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0845140201 |
| DOI | https://doi.org/10.5270/esa-pvb8dul |
| Principal Investigator, PI | Dr Davide Lena |
| Abstract | There is evidence that ultra-compact dwarf galaxies have ^ated mass-to-lightratios, possibly massive black holes (MBHs). Using stellar dynamics (SD) it wasargued that five such UCDs host MBHs in their nuclei ( 10^{6} <M_{\bullet}/M_{\odot} < 10^{7} ). However, robust SD measurements of BH massesare possible in near galaxies, where the BH sphere of influence iswell-resolved. It is thus important to find multiple lines of evidence for thepresence of such BHs. BHs accreting in a hard-state follow a scaling relationbetween their mass, radio, and X-ray luminosity. We selected two UCDs whereevidence for nuclear BHs has been found from SD. We propose to performsimultaneous X and radio observations to assess whether accreting BHs are indeed present in the nuclei of these two galaxies. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2019-06-08T18:53:28Z/2019-06-09T11:36:48Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2020-07-11T22:00:00Z |
| Keywords | "massive bhs", "nuclear bhs", "elevated mass", "xray luminosity", "light ratios", "multiple lines", "stellar dynamics sd", "robust sd measurements", "accreting bhs", "scaling relation", "bhs accreting", "bh masses", "bh sphere", "massive blackhole mbhs" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Davide Lena, 2020, 'Do massive BHs really reside in the nuclei of ultra-compact dwarf galaxiesquestionMark', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-pvb8dul |