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@article{1312119, author = {Paunzen, Ernst and Skarka, Marek and Walczak, Przemyslaw and Holdsworth, Daniel L. and Smalley, Barry and West, Richard G. and Janík, Jan}, article_number = {2}, doi = {http://dx.doi.org/10.1093/mnras/stv1652}, keywords = {techniques: photometric; stars: chemically peculiar; stars: variables: delta Scuti}, language = {eng}, issn = {0035-8711}, journal = {Monthly Notices of the Royal Astronomical Society}, title = {Lambda Bootis stars in the SuperWASP survey}, volume = {453}, year = {2015} }
TY - JOUR ID - 1312119 AU - Paunzen, Ernst - Skarka, Marek - Walczak, Przemyslaw - Holdsworth, Daniel L. - Smalley, Barry - West, Richard G. - Janík, Jan PY - 2015 TI - Lambda Bootis stars in the SuperWASP survey JF - Monthly Notices of the Royal Astronomical Society VL - 453 IS - 2 SP - 1241-1248 EP - 1241-1248 PB - Priestley and Weale SN - 00358711 KW - techniques: photometric KW - stars: chemically peculiar KW - stars: variables: delta Scuti N2 - We have analysed around 170 000 individual photometric WASP (Wide Angle Search for Planets) measurements of 15 well-established lambda Bootis stars to search for variability. The lambda 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. ER -
PAUNZEN, Ernst, Marek SKARKA, Przemyslaw WALCZAK, Daniel L. HOLDSWORTH, Barry SMALLEY, Richard G. WEST and Jan JANÍK. Lambda Bootis stars in the SuperWASP survey. \textit{Monthly Notices of the Royal Astronomical Society}. Priestley and Weale, 2015, vol.~453, No~2, p.~1241-1248. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stv1652.
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