| Proposal ID | 011248 |
| Title | A Study of the Loop I bubble by X-ray shodows of the Ophiuchus molecular cloud |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112480101 |
| DOI | https://doi.org/10.5270/esa-97iqwzz |
| Principal Investigator, PI | Dr Bernd Aschenbach |
| Abstract | GT- The Ophiuchus molecular cloud at a distance of 170 pc is located near thecentre of the Loop I superbubble, which is filled with hot gas of a few millionK. The large absorbing column of 10^{22} cm^{-2} will cast a deep shadow up toenergies of 1.5 keV. Ongoing dynamical processes (stellar winds, supernovae)within Loop I may lead to a non-equilibirum plasma state, which we can determineby the study of line ratios between 0.3 - 2.0 keV. We will perform on- andoff-cloud observations in order to distinguish between fore- and backgroundspectra. Three adjacent pointings of 15 ksec will cover the steepest gradient inX-ray brightness. In combination with the Aquila Rift proposal it is possible toisolate the X-ray spectrum of the hot gas produced by the Sco-Cen association. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-09-09T11:57:12Z/2002-02-24T17:48:18Z |
| 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 | 2003-03-16T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "deep shadow", "line ratios", "adjacent pointings", "ophiuchus molecular cloud", "hot gas", "background spectra", "steepest gradient", "absorbing column", "xray spectrum", "xray shodows", "equilibirum plasma", "170 pc", "cm ^{", "sco cen", "aquila rift", "xray brightness" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Bernd Aschenbach, 2003, 'A Study of the Loop I bubble by X-ray shodows of the Ophiuchus molecular cloud', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-97iqwzz |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |