| Proposal ID | 076305 |
| Title | Accretion, Flares and a Very Hot Corona in the cool AGB Star, Y Gem |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0763050201 |
| DOI | https://doi.org/10.5270/esa-c8r4gtf |
| Principal Investigator, PI | Dr Raghvendra Sahai |
| Abstract | We propose to make multi-epoch, co-eval observations of the X-ray emission froma cool AGB star, Y Gem. In dramatic contrast to most objects in its class, thisstar shows relatively strong X-ray emission implying the presence of ~50-150million degree coronal gas, and highly-variable FUV and NUV fluxes - likelyevidence of variable accretion onto a magnetized accretion disk in a binarysystem. Y Gem is the most prominent member of a new class of AGB stars with FUVexcesses identified using the GALEX archive. Our study will enable us toinvestigate the never-before explored phase of an active accretion disk in anAGB star with a binary companion. Such disks are believed to ultimately producecollimated jets that transform AGB circumstellar envelopes into bipolar planetary nebulae. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2015-09-29T01:52:04Z/2015-10-23T05:16:36Z |
| 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 | 2016-10-30T22:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "explored phase", "galex archive", "bipolar planetary nebulae", "variable accretion", "agb stars", "fuv excesses", "cool agb star", "nuv fluxes", "binary system", "binary companion", "magnetized accretion disk", "collimated jets", "variable fuv", "xray emission", "xray emission implying", "degree coronal gas", "agb star", "hot corona", "multi epoch", "co eval", "active accretion disk" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Raghvendra Sahai, 2016, 'Accretion, Flares and a Very Hot Corona in the cool AGB Star, Y Gem', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-c8r4gtf |