Delta Scuti Variables

Abstract

We review recent research on Delta Scuti stars from an observer's viewpoint. First, some signposts helping to lead the way through the Delta Scuti jungle are placed. Then, some problems in studying individual pulsators in the framework of asteroseismology are given before a view on how the study of these variables has benefited (or not) from past and present high-precision asteroseismic space missions is presented. Some possible pitfalls in the analysis of data with a large dynamical range in pulsational amplitudes are pointed out, and a strategy to optimize the outcome of asteroseismic studies of Delta Scuti stars is suggested. We continue with some views on "hybrid" pulsators and interesting individual High Amplitude Delta Scuti stars, and then take a look on Delta Scuti stars in stellar systems of several different kinds. Recent results on pre-main sequence Delta Scuti stars are discussed as are questions related to the instability strip of these variables. Finally, some remarkable new theoretical results are highlighted before, instead of a set of classical conclusions, questions to be solved in the future, are raised.

7 pages, 1 figure, Proceedings of the International Conference "Stellar Pulsation: Challenges for Observation and Theory", eds. J. A. Guzik & P. A. Bradley

References in corpus (2)

• Confirmation of simultaneous p and g mode excitation in HD 8801 and Gamma Peg from time-resolved multicolour photometry of six candidate "hybrid" pulsators
• The effect of different opacity data and chemical element mixture on the Petersen diagram

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• Discovery of resonating integration modes in triple-mode high-amplitude $\delta$ Scuti stars: A new evolutionary phase indicator
• K2 Observations of 95 Vir: delta Scuti Pulsations in a Chromospherically Active Star
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• KIC 10417986: Spectroscopic confirmation of the nature of the binary system with a δ Scuti component
• A Kepler K2 view of subdwarf A-type stars
• Halo Photometry and Asteroseismology for 98 of the Brightest Stars Observed by TESS
• The HADS Star CSS_J102714.3+205943: a Component of a Binary System with an Elliptic Orbit?
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