8–13 Sept 2019
Europe/Rome timezone
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The X-ray emission from hot subdwarf stars

13 Sept 2019, 15:13
1m

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)

Presentation materials