| Name | 082457 |
| Title | From ultraluminous X-ray to ultraluminous soft sources\: NGC 55 ULX novel study |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0824570101 |
| DOI | https://doi.org/10.5270/esa-wmb6wte |
| Author | European Space Agency |
| Description | In a recent work done with XMM-Newton, we have discovered that ultraluminous X-ray sources (ULXs) have strong relativistic winds in agreement with the theoretical predictions of high accretion rates. These winds can become optically thick enough to block and reprocess the disk X-ray photons, making the source appear as a soft thermal emitter or ultraluminous supersoft X-ray source (ULS). We want to test this hypothesis, by studying a ULX where the wind is already causing significant absorption of the X-ray continuum. NGC 55 ULX is the optimal target, a transitional object between ULXs and ULSs, which exhibits several strong blueshifted emission and absorption lines, and we propose to observe it for 250 ks to determine the velocity structure and location of its strong relativistic wind. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2018-11-17T09:05:01Z/2018-11-18T23:55:01Z |
| 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 | 2019-12-14T23:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2019, From Ultraluminous X-Ray To Ultraluminous Soft Sources\: Ngc 55 Ulx Novel Study, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-wmb6wte |