Symbiotic stars in X-rays. II. Faint sources detected with XMM-Newton and Chandra
Abstract
We report the detection from four symbiotic stars that were not known to be X-ray sources. These four object show a β-type X-ray spectrum, that is, their spectra can be modeled with an absorbed optically thin thermal emission with temperatures of a few million degrees. Photometric series obtained with the Optical Monitor on board XMM-Newton from V2416 Sgr and NSV 25735 support the proposed scenario where the X-ray emission is produced in a shock-heated region inside the symbiotic nebulae.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2014
- DOI:
- 10.1051/0004-6361/201322999
- arXiv:
- arXiv:1402.6790
- Bibcode:
- 2014A&A...565A..82N
- Keywords:
-
- binaries: symbiotic;
- X-rays: binaries;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 5 pages, 1 figure, 2 tables
