
| Proposal ID | 055587 |
| Title | Faint and soft X-ray binaries in three dwarf spheroidal galaxies |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0555870201 |
| DOI | https://doi.org/10.5270/esa-6p0k46n |
| Principal Investigator, PI | Dr Marina Orio |
| Abstract | We propose to observe three nearby dwarf spheroidal (dSph) companions of theMilky Way. These galaxies host old populations with little or no contaminationof recent star formation, and appear to have a huge dark matter content. Theyare the ideal Rosetta stones to probe theories of X-ray binary formation, typeIa progenitors evolution, and dark matter halos.Recent observations of fourother dSph with Chandra and XMM-Newton have revealed a large number of X-raysources in the fields, effected by small column density of neutral hydrogenN(H).Using deep optical and UV images, archival HST and GALEX exposures, andlater spectroscopic follow-up, we will be able to determine the nature of thesources and whether they belong to the galactic populations. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-11-24T07:38:18Z/2008-11-25T09:46:08Z |
| 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 | 2009-12-20T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "xray sources", "ideal rosetta stones", "XMM-Newton", "star formation", "soft xray binary", "xray binary formation", "archival hst", "dwarf spheroidal galaxy", "dark matter halos", "XMM", "HST", "uv images", "probe theories", "galactic populations", "neutral hydrogen nh", "deep optical", "column density", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Marina Orio, 2009, 'Faint and soft X-ray binaries in three dwarf spheroidal galaxies', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-6p0k46n |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |