| 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 virgul50-150million 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 |
| Keywords | "multi epoch", "cool agb star", "degree coronal gas", "variable fuv", "magnetized accretion disk", "bipolar planetary nebulae", "active accretion disk", "nuv fluxes", "agb stars", "agb star", "fuv excesses", "hot corona", "galex archive", "xray emission implying", "explored phase", "binary system", "xray emission", "collimated jets", "binary companion", "co eval", "variable accretion" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Raghvendra Sahai, 2016, 'Accretion comma Flares and a Very Hot Corona in the cool AGB Star comma Y Gem', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-c8r4gtf |