Name | 065478 |
Title | The Secret X-ray Lives of Cepheids: Are Classical Cepheids X-ray Variables? |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0654780201 |
DOI | https://doi.org/10.5270/esa-l5aakro |
Author | Prof Edward Guinan |
Description | We are now immersed in the middle of a stellar mystery: why (and how) are Classical Cepheids producing X-rays? We propose phase-constrained & better exposed XMM observations in Cycle 9 to solve this mystery, and initiate a leap forward in our understanding of Cepheid atmospheres, pulsations, winds, shocks and internal structures. It is worth noting that: all three Cepheids observed to date by XMM have successfully been detected and, more importantly, our recent XMM results mark the first ever unambiguous X-ray detections of Cepheids. The major aim of this proposal is to obtain deeper XMM observations of two previously observed Cepheids (Polaris & beta Dor) at critical pulsation phases to understand the mechanism(s) by which they produce X-rays. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2010-05-01T09:12:01Z/2010-05-01T19:43:10Z |
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 | 2011-05-21T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Edward Guinan, 2011, 065478, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-l5aakro |