J/MNRAS/439/2078 High-frequency A-type pulsators (Holdsworth+, 2014)
High-frequency A-type pulsators discovered using SuperWASP.
Holdsworth D.L., Smalley B., Gillon M., Clubb K.I., Southworth J.,
Maxted P.F.L., Anderson D.R., Barros S.C.C., Cameron A.C., Delrez L.,
Faedi F., Haswell C.A., Hellier C., Horne K., Jehin E., Norton A.J.,
Pollacco D., Skillen I., Smith A.M.S., West R.G., Wheatley P.J.
<Mon. Not. R. Astron. Soc., 439, 2078-2095 (2014)>
=2014MNRAS.439.2078H 2014MNRAS.439.2078H
ADC_Keywords: Stars, A-type ; Stars, variable ; Photometry
Keywords: asteroseismology - techniques: photometric - surveys -
stars: chemically peculiar - stars: oscillations -
stars: variables: δ Scuti
Abstract:
We present the results of a survey using the WASP archive to search
for high-frequency pulsations in F-, A- and B-type stars. Over 1.5
million targets have been searched for pulsations with amplitudes
greater than 0.5 millimagnitude. We identify over 350 stars which
pulsate with periods less than 30min. Spectroscopic follow-up of
selected targets has enabled us to confirm 10 new rapidly oscillating
Ap stars, 13 pulsating Am stars and the fastest known δ Scuti
star. We also observe stars which show pulsations in both the
high-frequency domain and the low-frequency δ Scuti range. This
work shows the power of the WASP photometric survey to find variable
stars with amplitudes well below the nominal photometric precision per
observation.
Description:
Pulsational frequencies and amplitudes of 377 A-type stars observed
with the SupwerWASP instrument (broad-band filter 400-700nm).
Frequencies are listed for the strongest 5 frequencies greater than
50c/d (if present). The targets may also show longer periodicities
which are not listed. Frequencies are presented in c/d and amplitudes
in milli-magnitudes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
pulsetab.dat 121 375 Pulsation frequencies and amplitudes (table5) of
A-type observed with SupwerWASP
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See also:
J/PASP/118/1407 : The WASP Project and the SuperWASP Cameras (Pollacco+, 2006)
Byte-by-byte Description of file: pulsetab.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [1SWASP]
7- 25 A19 --- 1SWASP Target ID in the WASP archive
(JHHMMSS.ss+DDMMSS.s)
27- 49 A23 --- SName Target ID as in SIMBAD
51- 55 F5.2 mag Vmag Magnitude in V band
57- 62 F6.2 d-1 F1 [49.9/243] Principal frequency
64- 69 F6.2 mmag A1 [0.5/105] Amplitude of principal frequency
71- 76 F6.2 d-1 F2 [50/245]? Frequency of second peak
78- 82 F5.2 mmag A2 [0.3/36]? Amplitude of second peak
84- 89 F6.2 d-1 F3 [50/245]? Frequency of third peak
91- 95 F5.2 mmag A3 [0.5/29]? Amplitude of third peak
97-102 F6.2 d-1 F4 [50/245]? Frequency of forth peak
104-108 F5.2 mmag A4 [0.5/20]? Amplitude of forth peak
110-115 F6.2 d-1 F5 [50/245]? Frequency of fifth peak
117-121 F5.2 mmag A5 [0.4/16]? Amplitude of fifth peak
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Acknowledgements:
Daniel L. Holdsworth, d.l.holdsworth(at)keele.ac.uk
(End) Daniel L. Holdsworth [Keele Univ., UK], Patricia Vannier [CDS] 13-May-2014