The Cycles of Alpha Centauri
Abstract
The main AB pair of the nearby Alpha Centauri triple system has one of the most extensive X-ray records of any cosmic object, stretching over three decades. The primary, α Cen A (G2V), is a near twin of the Sun, with a similarly soft (1-2 MK) corona. The secondary, α Cen B (K1V), is more active than the Sun, with a generally harder coronal spectrum. Here, spatially resolved measurements of the pair by Chandra's High Resolution Camera are compared, on a common basis, with previous pointings from ROSAT and XMM-Newton.
- Publication:
-
Solar and Stellar Variability: Impact on Earth and Planets
- Pub Date:
- February 2010
- DOI:
- 10.1017/S1743921309992559
- Bibcode:
- 2010IAUS..264..146A
- Keywords:
-
- X-rays: stars;
- stars: individual (HD 128620;
- HD 128621);
- stars: activity