A dataset provided by the European Space Agency

Name: From ultraluminous X-ray to ultraluminous soft sources: NGC 55 ULX novel study
Published: 2019-12-14T23:00:00Z

Proposal ID	082457
Title	From ultraluminous X-ray to ultraluminous soft sources: NGC 55 ULX novel study
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0824570101
DOI	https://doi.org/10.5270/esa-wmb6wte
Principal Investigator, PI	Dr Ciro Pinto
Abstract	In a recent work done with XMM-Newton, we have discovered that ultraluminousX-ray sources (ULXs) have strong relativistic winds in agreement with thetheoretical predictions of high accretion rates. These winds can becomeoptically thick enough to block and reprocess the disk X-ray photons, making thesource 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 isalready causing significant absorption of the X-ray continuum. NGC 55 ULX is theoptimal target, a transitional object between ULXs and ULSs, which exhibitsseveral strong blueshifted emission and absorption lines, and we propose toobserve it for 250 ks to determine the velocity structure and location of its strong relativistic wind.
Publications	Linking Soft Excess in Ultraluminous X-Ray Sources with Optically Thick Wind Driven by Supercritical Accretion \|Qiu Yanli Feng Hua \| ApJ \| 906-36 \| 2021 \| 2021ApJ...906...36Q \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...906...36Q Ionized emission and absorption in a large sample of ultraluminous X-ray sources \|Kosec P. Pinto C. et al. \| MNRAS \| 508-3569 \| 2021 \| 2021MNRAS.508.3569K \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.508.3569K Spectral and temporal properties of ultra-luminous X-ray source NGC 55 ULX1 \|Jithesh V. \| MNRAS \| 509-5166 \| 2022 \| 2022MNRAS.509.5166J \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.509.5166J A transient ultraluminous X-ray source in NGC 55 \|Robba A. Pinto C. et al. \| MNRAS \| 515-4669 \| 2022 \| 2022MNRAS.515.4669R \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.515.4669R Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1 \|Barra F. Pinto C. et al. \| MNRAS \| 516-3972 \| 2022 \| 2022MNRAS.516.3972B \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.516.3972B
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 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	2019-12-14T23:00:00Z
Last Update	2025-01-27
Keywords	"soft thermal emitter", "velocity structure", "optically thick", "optimal target", "disk xray photons", "xmm newton", "absorption lines", "XMM-Newton", "accretion rates", "NGC 55", "relativistic winds", "xray continuum", "ultraluminous xray", "relativistic wind", "XMM", "ulx novel", "transitional object", "blueshifted emission"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Ciro Pinto, 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