A handful of Class I protostars have been detected in X rays, but no firmlyestablished Class 0 object has ever been detected as an X ray source. I amproposing to obtain 30 ks pointings with XMM of two small dark cloud regions,each of which is known to harbor high-velocity molecular outflows, long chainsof HH emission knots, and low-luminosity Class 0 IRAS sources. The goal of theobservations is to determine whether the X ray and other physical properties ofthese objects and their surrounding environments are different from those ofembedded protostars that form in much more massive clouds. Because of theirlower density and mass, these small clouds may be more transparent to X-rays andhence more easily probed than a dense cloud like Orion.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2007-05-09T11:11:25Z/2007-07-31T18:41:29Z
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.
European Space Agency, Dr Theodore Simon, 2008, 'X-Ray Emission from Low-Mass Protostars in Two Small Dark Clouds', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-nyj5jxg
