| Name | 074351 |
| Title | The Secret Lives of Cepheids: Exploring Cepheid X-ray Activity and Variability |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743510201 |
| DOI | https://doi.org/10.5270/esa-3izb1tp |
| Author | European Space Agency |
| Description | We propose an XMM observation of the prototype of Classical Cepheids delta Cep to confirm X-ray variability. The data will complement our existing XMM data and HST FUV spectroscopy for this important star with well-defined, phased variability from 10,000 300,000 K plasmas, originating from pulsation-induced shocks. We request one 65-ksec exposure of delta Cep to confirm enhanced X-ray activity around 0.5p, observed in our previous XMM data. If confirmed, the phasing of the X-ray activity will stand in stark contrast to that of the FUV emissions, and provide important information on the atmospheric heating mechanism(s) of this Cepheid. We also propose a 40-ksec observation of the Cepheid zeta Gem to search for X-ray activity and expand the current Cepheid X-ray Inventory. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2015-03-23T05:42:37Z/2015-03-23T20:25:57Z |
| 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 | 2016-04-14T22:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2016, The Secret Lives Of Cepheids: Exploring Cepheid X-Ray Activity And Variability, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3izb1tp |