A dataset provided by the European Space Agency

Name 084514
Title Do massive BHs really reside in the nuclei of ultra-compact dwarf galaxies?


DOI https://doi.org/10.5270/esa-pvb8dul
Author Dr Davide Lena
Description There is evidence that ultra-compact dwarf galaxies have ^ated mass-to-light
ratios, possibly massive black holes (MBHs). Using stellar dynamics (SD) it was
argued that five such UCDs host MBHs in their nuclei ( 10^{6} <
M_{\bullet}/M_{\odot} < 10^{7} ). However, robust SD measurements of BH masses
are possible in near galaxies, where the BH sphere of influence is
well-resolved. It is thus important to find multiple lines of evidence for the
presence of such BHs. BHs accreting in a hard-state follow a scaling relation
between their mass, radio, and X-ray luminosity. We selected two UCDs where
evidence for nuclear BHs has been found from SD. We propose to perform
simultaneous X and radio observations to assess whether accreting BHs are indeed present in the nuclei of these two galaxies.
Publication No observations found associated with the current proposal
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 Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Davide Lena, 2020, 084514, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-pvb8dul