A dataset provided by the European Space Agency

Name 086289
Title Does the Wolf-Rayet Star WR 66 Harbor a Compact Companion


DOI https://doi.org/10.57780/esa-ntilmwz
Author Dr Stephen Skinner
Description Two independent studies have detected short-period optical variability in the Wolf-Rayet star WR 66. The optical period P = 3.5-4.1 hr is too short to be explained by the stars rotation. The most likely causes are stellar pulsations or a close companion (possibly a BH or NS) orbiting deep in the WR wind. We propose to obtain the first pointed X-ray observation of WR 66. Its X-ray spectral and timing properties will allow us to place it into context with other WR stars and may shed light on its unusual variability.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2021-02-12T08:33:55Z/2021-02-13T00:40:35Z
Version 18.02_20200221_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 2022-03-04T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2022-03-04T00:00:00Z, 086289, 18.02_20200221_1200. https://doi.org/10.57780/esa-ntilmwz