| Name | 090416 |
| Title | Smaller than an Ant: the least massive cluster with a radio halo |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0904160101 |
| DOI | https://doi.org/10.57780/esa-[xxxxxxx] |
| Author | European Space Agency |
| Description | We propose an XMM observation of the A671 cluster. It is the lowest mass cluster for which a radio halo has been observed in the LOFAR survey covering nearly 30% of the Northern sky at the low frequency of 150 MHz. Radio halos in low mass clusters are a test-bed for turbulent re-acceleration, which is currently the favoured scenario to explain their formation. They should be rare, in merging systems and with a very steep radio spectrum. With a modest amount of XMM exposure time (25 ks) we will be able to obtain a rich characterization of the dynamical state and thermal structure of the cluster, given its high flux, providing a powerful test of radio-halo formation. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2023-04-02T21:27:44Z/2023-04-03T08:17:44Z |
| Version | 20.10_20230417_1156 |
| 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 | 2024-04-28T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2024, Smaller Than An Ant: The Least Massive Cluster With A Radio Halo, 20.10_20230417_1156, European Space Agency, https://doi.org/10.57780/esa-[xxxxxxx] |