| Proposal ID | 090057 |
| Title | Bringing stripped stars to X-ray light |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0900570201 |
| DOI | https://doi.org/10.57780/esa-wp8v6ys |
| Principal Investigator, PI | Prof Lidia Oskinova |
| Abstract | 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, primarys spectral types, and sdO-star mass. Comparativeanalysis of their X-ray spectra will uncover leading processes responsible for plasma heating in Be+sdO stars. |
| Publications | No publications found for current proposal! |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-05-11T15:31:49Z/2022-05-11T22:45:09Z |
| 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 | 2023-06-28T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "bringing stripped stars", "exposure time", "spectral types", "sdo stars", "uncover leading processes", "xray spectra", "xray light", "prototypical massive binary", "close binary evolution", "comparative analysis", "star winds", "sdo companions", "mass exchange", "hot companions", "orbital configurations", "sdo star mass", "sdo systems", "type stars", "plasma heating", "xray emission" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Lidia Oskinova, 2023, 'Bringing stripped stars to X-ray light', 21.51_20241115_1113, European Space Agency, https://doi.org/10.57780/esa-wp8v6ys |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |