Paunzen, E, Skarka, M, Walczak, P, Holdsworth, DL, Smalley, B ORCID: https://orcid.org/0000-0002-3456-087X, West, RG and Janik, J (2015) lambda Bootis stars in the SuperWASP survey. Monthly Notices of the Royal Astronomical Society, 453 (2). 1241 -1248.

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Abstract

We have analysed around 170 000 individual photometric WASP (Wide Angle Search for Planets) measurements of 15 well-established λ Bootis stars to search for variability. The λ Bootis stars are a small group of late-B to early-F, Pop I, stars that show moderate to extreme (surface) underabundances (up to a factor 100) of most Fe-peak elements, but solar abundances of lighter elements (C, N, O and S). They are excellent laboratories for the study of fundamental astrophysical processes such as diffusion, meridional circulation, stellar winds and accretion in the presence of pulsation. From the 15 targets, 8 are variable and 7 are apparently constant with upper limits between 0.8 and 3.0 mmag. We present a detailed time-series analysis and a comparison with previously published results. From an asteroseismologic study, we conclude that the found chemical peculiarities are most probably restricted to the surface.

Item Type: Article
Additional Information: This article has been accepted for publication in the Monthly Notices of the Royal Astronomical Society © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: techniques photometric, stars, chemically peculiar, variables, δ Scuti
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 15 Jun 2016 09:41
Last Modified: 24 Apr 2019 10:45
URI: http://eprints.keele.ac.uk/id/eprint/1867

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