Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-10-20
Astronomy and Astrophysics
Astrophysics
5 pages, 8 figures. To be published in: The Solar Cycle and Terrestrial Climate, ESA Publ. SP-463, in press
Scientific paper
Whereas a variation of the solar luminosity, L, will inevitably cause a similar change of the total solar irradiance, S, the opposite is not true. In fact, the bulk of the days to months variations of S can be explained entirely in terms of the passage of active regions across the solar disk. In this case, L remains essentially unchanged. For the total irradiance variation observed over the solar cycle, the issue is more uncertain. One view explains this modulation primarily as a combined action of active regions and magnetic network. These components would be superposed to an otherwise unchanging photosphere. the other view suggests that the activity cycle modulation of S is primarily produced by a variation of L (both in terms of R and T_{eff}) caused by structural reajustments of the interior of the Sun induced by a changing magnetic field. We will present evidence in support of this second interpretation, and a model for it. We will also present the S variations over the last 5 centuries implied by our model.
Li Linghuai H.
Sofia Sabatino
No associations
LandOfFree
Irradiance or luminosity changes? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Irradiance or luminosity changes?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Irradiance or luminosity changes? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-666902