Speaker
Nicola La Palombara
(Istituto Nazionale di Astrofisica (INAF))
Description
In the last decade the high throughput and spectral resolution of the XMM-Newton and Chandra X-ray telescopes has allowed us to investigate the X-ray emission from hot subdwarf stars. Up to now, we have detected in X-rays five sdO stars. All of them show intrinsic X-ray emission and their spectrum can be described with the sum of two or three thermal-plasma components, as in the case of normal O-type stars. Therefore, the X-ray emission seems to originate from shock instabilities in the wind. These results show that the X-ray observation of hot subdwarf stars is essential for understanding their properties.
| Affiliation | INAF - IASF Milano |
|---|---|
| Topic | Compact and diffuse sources in galaxies and in the Galactic Center |
Primary authors
Nicola La Palombara
(Istituto Nazionale di Astrofisica (INAF))
Sandro Mereghetti
(Istituto Nazionale di Astrofisica (INAF))
Dr
Paolo Esposito
(INAF-IASF Milano)
Dr
Andrea Tiengo
(IUSS Pavia)
