We request 35ks exposure time to measure X-ray spectra of two prototypicalmassive binary Be stars with sdO companions. We aim to probe the theory whichpredicts that Be-type stars are the products of close binary evolution, andthat a significant fraction of them have hot companions which were stripped ofhydrogen by a mass exchange. These hot ..stripped. companions with sdO spectraltypes drive stellar winds which could collide and interact with the Be starwinds and disks, and hence have unique signatures in their X-ray emission. Thetwo prototypical Be+sdO systems, phi Per and o Pup, probe different orbitalconfigurations, primary.s spectral types, and sdO-star mass. Comparativeanalysis of their X-ray spectra will uncover leading processes responsible for plasma heating in Be+sdO stars.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-05-11T15:31:49Z/2022-05-11T22:45:09Z
Version
20.08_20220509_1852
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, Prof Lidia Oskinova, 2023, 'Bringing stripped stars to X-ray light', 20.08_20220509_1852, European Space Agency, https://doi.org/10.57780/esa-wp8v6ys
