Resolving the pulsations of the subdwarf B star KPD 2109 + 4401

A. Y. Zhou; M. D. Reed; S. Harms; D. M. Terndrup; D. An; S. Zola; K. D. Gazeas; P. G. Niarchos; W. Ogloza; A. Baran; G. W. Wolf

doi:10.1111/j.1365-2966.2005.09933.x

Resolving the pulsations of the subdwarf B star KPD 2109 + 4401

A. Y. Zhou, M. D. Reed, S. Harms, D. M. Terndrup, D. An, S. Zola, K. D. Gazeas, P. G. Niarchos, W. Ogloza, A. Baran, G. W. Wolf

Department of Science Education

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Abstract

ABSTRACT We present the results of extensive time-series photometry of the pulsating subdwarf B star KPD 2109 + 4401. Our data set consists of 29 data runs with a total length of 182.6 h over 31 d, collected at five observatories in 2004. These data comprised high signal-to-noise ratio observations acquired with larger telescopes and wider time-coverage observations obtained with smaller telescopes. They are sufficient to resolve the pulsation structure to 0.4 μHz and are the most extensive data set for this star to date. With these data, we identify eight pulsation frequencies extending from 4701 to 5481 μHz, corresponding to periods of 182-213 s. The pulsation frequencies and their amplitudes are examined over several time-scales with some frequencies showing amplitude variability.

Original language	English
Pages (from-to)	179-185
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	367
Issue number	1
DOIs	https://doi.org/10.1111/j.1365-2966.2005.09933.x
State	Published - Mar 2006

Keywords

Stars: individual: KPD 2109 + 4401
Stars: oscillations
Stars: variables: other
Subdwarfs

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10.1111/j.1365-2966.2005.09933.x

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title = "Resolving the pulsations of the subdwarf B star KPD 2109 + 4401",

abstract = "ABSTRACT We present the results of extensive time-series photometry of the pulsating subdwarf B star KPD 2109 + 4401. Our data set consists of 29 data runs with a total length of 182.6 h over 31 d, collected at five observatories in 2004. These data comprised high signal-to-noise ratio observations acquired with larger telescopes and wider time-coverage observations obtained with smaller telescopes. They are sufficient to resolve the pulsation structure to 0.4 μHz and are the most extensive data set for this star to date. With these data, we identify eight pulsation frequencies extending from 4701 to 5481 μHz, corresponding to periods of 182-213 s. The pulsation frequencies and their amplitudes are examined over several time-scales with some frequencies showing amplitude variability.",

keywords = "Stars: individual: KPD 2109 + 4401, Stars: oscillations, Stars: variables: other, Subdwarfs",

author = "Zhou, {A. Y.} and Reed, {M. D.} and S. Harms and Terndrup, {D. M.} and D. An and S. Zola and Gazeas, {K. D.} and Niarchos, {P. G.} and W. Ogloza and A. Baran and Wolf, {G. W.}",

year = "2006",

month = mar,

doi = "10.1111/j.1365-2966.2005.09933.x",

language = "English",

volume = "367",

pages = "179--185",

journal = "Monthly Notices of the Royal Astronomical Society",

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T1 - Resolving the pulsations of the subdwarf B star KPD 2109 + 4401

AU - Zhou, A. Y.

AU - Reed, M. D.

AU - Harms, S.

AU - Terndrup, D. M.

AU - An, D.

AU - Zola, S.

AU - Gazeas, K. D.

AU - Niarchos, P. G.

AU - Ogloza, W.

AU - Baran, A.

AU - Wolf, G. W.

PY - 2006/3

Y1 - 2006/3

N2 - ABSTRACT We present the results of extensive time-series photometry of the pulsating subdwarf B star KPD 2109 + 4401. Our data set consists of 29 data runs with a total length of 182.6 h over 31 d, collected at five observatories in 2004. These data comprised high signal-to-noise ratio observations acquired with larger telescopes and wider time-coverage observations obtained with smaller telescopes. They are sufficient to resolve the pulsation structure to 0.4 μHz and are the most extensive data set for this star to date. With these data, we identify eight pulsation frequencies extending from 4701 to 5481 μHz, corresponding to periods of 182-213 s. The pulsation frequencies and their amplitudes are examined over several time-scales with some frequencies showing amplitude variability.

AB - ABSTRACT We present the results of extensive time-series photometry of the pulsating subdwarf B star KPD 2109 + 4401. Our data set consists of 29 data runs with a total length of 182.6 h over 31 d, collected at five observatories in 2004. These data comprised high signal-to-noise ratio observations acquired with larger telescopes and wider time-coverage observations obtained with smaller telescopes. They are sufficient to resolve the pulsation structure to 0.4 μHz and are the most extensive data set for this star to date. With these data, we identify eight pulsation frequencies extending from 4701 to 5481 μHz, corresponding to periods of 182-213 s. The pulsation frequencies and their amplitudes are examined over several time-scales with some frequencies showing amplitude variability.

KW - Stars: individual: KPD 2109 + 4401

KW - Stars: oscillations

KW - Stars: variables: other

KW - Subdwarfs

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U2 - 10.1111/j.1365-2966.2005.09933.x

DO - 10.1111/j.1365-2966.2005.09933.x

M3 - Article

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SN - 0035-8711

VL - 367

SP - 179

EP - 185

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

Resolving the pulsations of the subdwarf B star KPD 2109 + 4401

Abstract

Keywords

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