Hostname: page-component-65f69f4695-22rqw Total loading time: 0 Render date: 2025-06-28T10:57:59.273Z Has data issue: false hasContentIssue false
  • English
  • Français

Photometric Variability of Luminous Blue Variable Stars on Different Time-Scales

Published online by Cambridge University Press:  29 August 2019

G. Gantchev  and
P. Nedialkov
G. Gantchev
Affiliation:
Department of Astronomy, University of Sofia, Bulgaria email: g_gantchev@phys.uni-sofia.bg
P. Nedialkov
Affiliation:
Department of Astronomy, University of Sofia, Bulgaria email: g_gantchev@phys.uni-sofia.bg
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.

We have compiled historical observations, spanning ∼100 years, for a dozen of the best-studied LBVs in the Local Group. We described how we prepared structure functions for their light-curves and calculated two parameters (the structure function slope and the characteristic time-scale) to describe the behaviour of the LBVs. The sensitivity of those parameters to the variability behaviour of the stars was tested with a number of photometric data sets. The slope of the structure function may anticorrelate with the time-scale. These types of variable stellar objects are crucial to studies of stellar variability and the final stages of stellar evolution.

Keywords

Luminous Blue Variablesstructure functiontime-scale

References

Gantchev, G., et al. 2017, Bulgarian Astron. J., 26, 16Google Scholar
Groh, J. H., Meynet, G., & Ekström, S. 2013, A&A, 550 L7Google Scholar
Hubble, E., & Sandage, A. 1953, ApJ, 118, 353CrossRefGoogle Scholar
Hughes, P. A., Aller, H. H., & Aller, M. F. 1992, ApJ, 396, 396CrossRefGoogle Scholar
Humphreys, R. & Davidson, K. 1994, PASP, 106, 1025CrossRefGoogle Scholar
Humphreys, R. & Weis, K. 2014, ApJ, 790, 48CrossRefGoogle Scholar
Massey, P., et al. 2007, ApJ, 134, 2474CrossRefGoogle Scholar
Meynet, G., Eggenberger, P., & Maeder, A. 2011, A&A, 525, L11Google Scholar
Ovcharov, E. P., et al. 2008, MNRAS, 386, 819CrossRefGoogle Scholar
Rosino, L. & Bianchini, A. 1973, A&A, 22, 453Google Scholar
Sharov, A. S. 1990, AZh, 67, 723Google Scholar
Wolf, B. 1989, A&A, 217, 87Google Scholar