| |
 |
| Paper: |
Is Solar Activity Once More Fainting? |
| Volume: |
472, New Quests in Stellar Astrophysics III: A Panchromatic View of Solar-like Stars, With and Without Planets |
| Page: |
273 |
| Authors: |
Mares Aguilar, C. E.; Schröder, K.-P.; Song, G. |
| Abstract: |
After an anomalously long and deep minimum, will the Sun
now once again reach a period of weaker activity cycles,
which would affect northern hemisphere winter climate?
We here discuss the current state and outlook of solar
activity, and we propose to monitor the solar Ca II K line
emission “as a star”, as part of the regular observing schedule
of the Hamburg robotic telescope, which is bound to move to
Guanajuato this year (2012). In fact, the chromospheric Ca II K line
emission is a good proxy for the solar far-ultraviolet flux,
as both are generated at about the same plasma temperatures (12–15,000 K)
and both
originate from the same active regions (plages). The solar ultraviolet flux, in
turn, warms the stratosphere by photo dissociation of ozone and other
molecules and, consequently,
affects the strength of the North Atlantic Oscillation (NOA). |
|
|
|
|
|
