Comparing the observational instability regions for pulsating pre-main sequence and classical $\delta$ Scuti stars

Abstract

A comparison of the hot and cool boundaries of the classical instability strip with observations has been an important test for stellar structure and evolution models of post- and main sequence stars. Over the last few years, the number of pulsating pre-main sequence (PMS) stars has increased significantly: 36 PMS pulsators and candidates are known as of June 2007. This number allows to investigate the location of the empirical PMS instability region and to compare its boundaries to those of the classical (post- and main sequence) instability strip. Due to the structural differences of PMS and (post-)main sequence stars, the frequency spacings for nonradial modes will be measurably different, thus challenging asteroseismology as a diagnostic tool.

accepted by ApJ

References in corpus (10)

• Astrophysical parameters of Galactic open clusters
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Cited by in corpus (27)

• The Ages of Stars
• Probing the interior physics of stars through asteroseismology
• KIC 3858884: a hybrid δ Sct pulsator in a highly eccentric eclipsing binary
• Echography of young stars reveals their evolution
• Statistical Properties of Galactic δ Scuti Stars: Revisited
• A Pulsation Search Among Young Brown Dwarfs and Very Low Mass Stars
• Pulsational instability of pre-main sequence models from accreting protostars. I. Constraining the input physics for accretion with spectroscopic parameters and stellar pulsations
• Kepler observations of A-F pre-main sequence stars in Upper Scorpius: Discovery of six new $\delta$~Scuti and one $\gamma$~Doradus stars
• MOST photometry of the enigmatic PMS pulsator HD 142666
• The Color-Magnitude Diagram of NGC 2264
• Pulsational analysis of V 588 Mon and V 589 Mon observed with the MOST and CoRoT satellites
• CoRoT\,102699796, the first metal-poor Herbig Ae pulsator: a hybrid $\delta$ Sct-$\gamma$ Dor variable?
• Regular frequency patterns in the young delta Scuti star HD 261711 observed by the CoRoT and MOST satellites
• Discovery of non-radial pulsations in the spectroscopic binary Herbig Ae star RS Cha
• Ubiquitous H-alpha polarized line profiles: absorptive spectropolarimetric effects and temporal variability in Post-AGB, Herbig Ae/Be and other stellar types
• The Pre-main Sequence: Challenges and Prospects for Asteroseismology
• Spectroscopic monitoring of the Herbig Ae star HD 104237. II. Non-radial pulsations, mode analysis and fundamental stellar parameters
• Application of the Baade-Wesselink method to a pulsating cluster Herbig Ae star: H254 in IC348
• Multisite photometry of the pulsating Herbig Ae star V346 Ori
• Matching the frequency spectrum of PMS stars by means of standard and rotating models
• Variable Stars in Young Open Cluster NGC 2244
• The occultation events of the Herbig Ae/Be star V1247 Ori
• Age-Related Observations of Low Mass Pre-Main and Young Main Sequence Stars (Invited Review)
• Searching for $\delta$ Scuti-type pulsation and characterising northern pre-main-sequence field stars
• Determining the evolutionary stage of the delta Scuti star HIP 80088 with asteroseismology
• Asteroseismology of the pre-main-sequence $\delta$ Scuti pulsator IP Persei
• A CCD Search for Variable Stars in the Open Cluster NGC 6611