Hostname: page-component-76fb5796d-25wd4 Total loading time: 0 Render date: 2024-04-30T03:07:55.903Z Has data issue: false hasContentIssue false

The Photometric Variability of Solar-Type Stars

Published online by Cambridge University Press:  27 October 2016

Mark S. Giampapa*
Affiliation:
National Solar Observatory, 950 N. Cherry Ave., POB 26732, Tucson, Arizona USA email: giampapa@nso.edu
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The joint variability of chromospheric emission with the integrated flux in the Kepler visible band for the Sun as a star is examined. No correlation between our Ca II K line parameter and the Kepler passband is seen, suggesting that visible-band variability in solar-like stars is mostly independent of solar-like chromospheric activity. However, the K-line parameter time series and the total solar flux in the infrared K band appear weakly correlated, reflecting the wavelength dependence of the relationship between magnetic activity and broadband variability. We then apply a schematic, three-component model as a framework for the discussion of stellar photometric variability as observed by Kepler. The model confirms that spots tend to dominate stellar photometric variability in the visible though interesting cases do emerge where the facular disk coverage may become important in determining the amplitude of broadband variability.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

Andretta, V., Giampapa, M. S., Covino, E. et al. 2015, in preparationGoogle Scholar
Bastien, F. A., et al. 2015, in preparationGoogle Scholar
Hall, J. C., Henry, G. W., Lockwood, G. W., Skiff, B. A., & Saar, S. H. 2009, AJ, 138, 312 Google Scholar
Hall, J. C. & Lockwood, G. W. 2000, ApJ, 541, 436 Google Scholar
Hudson, H. S. 2015, Journal of Physics Conference Series, 632, 012058 Google Scholar
Husser, T.-O., Wende-von Berg, S., Dreizler, S., et al. 2013, A&A, 553, A6 Google Scholar
Keller, C. U., Harvey, J. W., & Giampapa, M. S. 2003, Proc. SPIE, 4853, 194 Google Scholar
Lockwood, G. W., Skiff, B. A., Henry, G. W., et al. 2007, ApJS, 171, 260 Google Scholar
McClintock, W. E., Rottman, G. J., & Woods, T. N. 2000, Proc. SPIE, 4135, 225 Google Scholar
Meibom, S., Mathieu, R. D., & Stassun, K. G. 2009, ApJ, 695, 679 Google Scholar
Rottman, G. J., Woods, T. N., & McClintock, W. 2006, Advances in Space Research, 37, 201 Google Scholar
Shapiro, A. I., Solanki, S. K., Krivova, N. A., Yeo, K. L., & Schmutz, W. K. 2015, A&A, in press. doi: 10.1051/0004-63611201527527 Google Scholar
Worden, S. P. 1975, Ph.D. Dissertation, University of Arizona, TucsonGoogle Scholar