A dataset provided by the European Space Agency

Proposal ID 004115
Title NGC 7009: Testing the Wind-Wind Interaction Formation of Planetary Nebulae
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0041150201

DOI https://doi.org/10.5270/esa-u1ndhkg
Principal Investigator, PI Prof You-Hua Chu
Abstract It is commonly accepted that planetary nebulae (PNe) are formed by interactions between the current fast wind and a previous slow wind from the central star. The shock-heated fast wind in the central cavity should be a diffuse X-ray source. ROSAT observations of PNe have detected diffuse emission in two nebulae, NGC\,6543 and Abell 30, but in both cases the X-rays appear to be associated with jets and outflows. To date, diffuse X-ray emission from shocked stellar winds in PNe has not been unambiguously detected. We request a 30 ks XMM EPIC pn observation of NGC\,7009, which was detected but not resolved by the ROSAT PSPC. This observation and our complementary optical observations allow a comprehensive investigation of the wind-wind interaction model of PNe.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-04-30T06:39:14Z/2001-04-30T20:55:04Z
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 2002-09-03T00:00:00Z
Keywords "shocked stellar winds", "xmm epic pn", "Abell 30", "planetary nebulae pne", " 7009", "comprehensive investigation", "planetary nebulae", "central star", "central cavity", "NGC 7009", "diffuse emission", "complementary optical", "ROSAT", "diffuse xray source", "XMM", "rosat pspc", "EPIC", "ngc \", "slow wind", "diffuse xray emission", "fast wind", "ngc 7009", " 6543"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof You-Hua Chu, 2002, 'NGC 7009: Testing the Wind-Wind Interaction Formation of Planetary Nebulae', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-u1ndhkg