| Proposal ID | 092392 |
| Title | Discovering a pronounced X-ray cycle of a famous transiting hot Neptune host |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0923920101 |
| DOI | https://doi.org/10.57780/esa-fm2qxre |
| Principal Investigator, PI | Dr Christian Schneider |
| Abstract | Magnetic activity features are often variable, and some systems show clearsinusoidal modulations. Such activity cycles can change the stellar X-ray to EUVemission (XUV henceforth) by factors of a few. This also changes the EUVirradiation of orbiting exoplanets. XUV irradiation drives planetary mass-lossand likely shapes the exoplanet population at large. Models predict that XUVirradiation and mass-loss rate are correlated, i.e., can be challenged bymeasuring the mass-loss of the same exoplanet during different phases of thehost stars magnetic cycle. The 7 year optical cycle of GJ 436 allows thisexperiment if mirrored in X-rays. Existing X-ray data cover only a very limitedphase space. We propose two new 20 ks observations of GJ 436 to reliably discover the X-ray cycle of GJ 436. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2023-06-17T16:29:29Z/2023-11-19T14:22:17Z |
| Version | 20.10_20230417_1156 |
| 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 | 2024-12-19T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | XMM-Newton, OM, RGS, EPIC, X-ray, Multi-Mirror, SAS |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Christian Schneider, 2024, 'Discovering a pronounced X-ray cycle of a famous transiting hot Neptune host', 20.10_20230417_1156, European Space Agency, https://doi.org/10.57780/esa-fm2qxre |