About: HD 54272, a classical lambda Bootis star and gamma Doradus pulsator     Goto   Sponge   NotDistinct   Permalink

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Description
  • We detect the second known lambda Bootis star (HD 54272) which exhibits gamma Doradus-type pulsations. The star was formerly misidentified as a RR Lyrae variable. The lambda Bootis stars are a small group (only 2 per cent) of late B to early F-type, Population I stars which show moderate to extreme (up to a factor 100) surface underabundances of most Fe-peak elements and solar abundances of lighter elements (C, N, O, and S). The photometric data from the Wide Angle Search for Planets (WASP) and All Sky Automated Survey (ASAS) projects were analysed. They have an overlapping time base of 1566 d and 2545 d, respectively. Six statistically significant peaks were identified (f(1) = 1.410 116 d(-1), f(2) = 1.283 986 d(-1), f(3) = 1.293 210 d(-1), f(4) = 1.536 662 d(-1), f(5) = 1.157 22 d(-1) and f(6) = 0.226 57 d(-1)). The spacing between f(1) and f(2), f(1) and f(4), f(5) and f(2) is almost identical. Since the daily aliasing is very strong, the interpretation of frequency spectra is somewhat ambiguous.
  • We detect the second known lambda Bootis star (HD 54272) which exhibits gamma Doradus-type pulsations. The star was formerly misidentified as a RR Lyrae variable. The lambda Bootis stars are a small group (only 2 per cent) of late B to early F-type, Population I stars which show moderate to extreme (up to a factor 100) surface underabundances of most Fe-peak elements and solar abundances of lighter elements (C, N, O, and S). The photometric data from the Wide Angle Search for Planets (WASP) and All Sky Automated Survey (ASAS) projects were analysed. They have an overlapping time base of 1566 d and 2545 d, respectively. Six statistically significant peaks were identified (f(1) = 1.410 116 d(-1), f(2) = 1.283 986 d(-1), f(3) = 1.293 210 d(-1), f(4) = 1.536 662 d(-1), f(5) = 1.157 22 d(-1) and f(6) = 0.226 57 d(-1)). The spacing between f(1) and f(2), f(1) and f(4), f(5) and f(2) is almost identical. Since the daily aliasing is very strong, the interpretation of frequency spectra is somewhat ambiguous. (en)
Title
  • HD 54272, a classical lambda Bootis star and gamma Doradus pulsator
  • HD 54272, a classical lambda Bootis star and gamma Doradus pulsator (en)
skos:prefLabel
  • HD 54272, a classical lambda Bootis star and gamma Doradus pulsator
  • HD 54272, a classical lambda Bootis star and gamma Doradus pulsator (en)
skos:notation
  • RIV/00216224:14310/14:00075729!RIV15-MSM-14310___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(7AMB12AT003), P(7AMB14AT015), S
http://linked.open...iv/cisloPeriodika
  • 2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 18823
http://linked.open...ai/riv/idVysledku
  • RIV/00216224:14310/14:00075729
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • techniques: photometric; stars: chemically peculiar; stars: individual: HD 54272; stars: variables: delta Scuti; stars: variables: RR Lyrae (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [487D58F1F72B]
http://linked.open...i/riv/nazevZdroje
  • Monthly Notices of the Royal Astronomical Society
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 440
http://linked.open...iv/tvurceVysledku
  • Paunzen, Ernst
  • Skarka, Marek
  • Holdsworth, Daniel
  • Smalley, Barry
  • West, Richard
http://linked.open...ain/vavai/riv/wos
  • 000334742200006
issn
  • 0035-8711
number of pages
http://bibframe.org/vocab/doi
  • 10.1093/mnras/stu415
http://localhost/t...ganizacniJednotka
  • 14310
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