
| Proposal ID | 004115 |
| Title | NGC 7009: Testing the Wind-Wind Interaction Formation of Planetary Nebulae |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0041150101 |
| 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 |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-04-30T06:39:14Z/2001-04-30T20:55:04Z |
| Version | 21.51_20241115_1113 |
| 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 |
| Last Update | 2026-07-09 |
| Keywords | "central cavity", "diffuse xray source", "planetary nebulae", "NGC 7009", "XMM", "shocked stellar winds", "comprehensive investigation", "xmm epic pn", "ngc \", "central star", "EPIC", "diffuse emission", "diffuse xray emission", "Abell 30", "fast wind", "slow wind", "ngc 7009", "ROSAT", " 6543", " 7009", "complementary optical", "rosat pspc", "planetary nebulae pne" |
| 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', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-u1ndhkg |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |