| Proposal ID | 094073 |
| Title | XMM+VLA follow-up of X-ray weak optically-variable massive black holes |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0940730101 |
| DOI | https://doi.org/10.57780/esa-8hkenbv |
| Principal Investigator, PI | Dr Riccardo Arcodia |
| Abstract | Recent work using eROSITA data has highlighted strong X-ray weakness in a sampleof optically/IR variable massive black holes (MBHs) in dwarf galaxies. Here wefocus on a carefully selected sample of 5 dwarf galaxies, all exhibitingsignificant optical nuclear variability, but all undetected in X-rays. TheseMBHs are found to be X-ray weak even compared to predictions for low-luminosityAGN accreting at 10^(-3)-10^(-2) Edd., which might imply very unusual accretionmodes and duty cycles. We request observations with XMM+VLA to study theemission of these low-luminosity MBHs, in comparison with the optical proxieswhich suggest an active nature. Discriminatory constraints can be achieved withonly 10ks on-source with XMM and 20min on-source with VLA. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2024-10-18T19:31:52Z/2025-02-01T06:10:00Z |
| Version | 21.51_20241115_1113 |
| 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 | 2026-02-21T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | XMM-Newton, OM, RGS, EPIC, X-ray, Multi-Mirror, SAS |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Riccardo Arcodia, 2026, 'XMM+VLA follow-up of X-ray weak optically-variable massive black holes', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-8hkenbv |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |