Whole earth telescope observations of the dav white dwarf G226-29

S. O. Kepler; O. Giovannini; M. A. Wood; R. E. Nather; D. E. Winget; A. Kanaan; S. J. Kleinman; P. A. Bradley; J. L. Provencal; J. C. Clemens; C. F. Claver; T. K. Watson; K. Yanagida; K. Krisciunas; T. M.K. Marar; S. Seetha; B. N. Ashoka; E. Leibowitz; H. Mendelson; T. Mazeh; P. Moskalik; J. Krzesiński; G. Pajdosz; S. Zoła; J. E. Solheim; P. I. Emanuelsen; N. Dolez; G. Vauclair; M. Chevreton; J. R. Fremy; M. A. Barstow; A. E. Sansom; R. W. Tweedy; D. T. Wickramasinghe; L. Ferrario; D. J. Sullivan; A. J. Van Der Peet; D. A.H. Buckley; A. L. Chen

doi:10.1086/175924

Whole earth telescope observations of the dav white dwarf G226-29

S. O. Kepler^*, O. Giovannini, M. A. Wood, R. E. Nather, D. E. Winget, A. Kanaan, S. J. Kleinman, P. A. Bradley, J. L. Provencal, J. C. Clemens, C. F. Claver, T. K. Watson, K. Yanagida, K. Krisciunas, T. M.K. Marar, S. Seetha, B. N. Ashoka, E. Leibowitz, H. Mendelson, T. MazehP. Moskalik, J. Krzesiński, G. Pajdosz, S. Zoła, J. E. Solheim, P. I. Emanuelsen, N. Dolez, G. Vauclair, M. Chevreton, J. R. Fremy, M. A. Barstow, A. E. Sansom, R. W. Tweedy, D. T. Wickramasinghe, L. Ferrario, D. J. Sullivan, A. J. Van Der Peet, D. A.H. Buckley, A. L. Chen

^*Corresponding author for this work

School of Physics and Astronomy

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Abstract

We observed G226 - 29 for 121 hr in 1992 February and confirm the presence of the three previously identified frequencies close to 109 s. We find no evidence of other pulsation periods down to our noise level of about 0.35 millimodulation amplitudes. The presence of only one triplet pulsation mode in G226 - 29 and its effective temperature near the blue edge of the instability strip identify the observed triplet of modes near 109 s as rotationally split components of the k = 1, l = 1 mode. With the mode identification, we derived a rotation period of 8.9 hr and an inclination of the pulsation axis of 70°-75° to our line of sight.

Original language	English
Pages (from-to)	874-879
Number of pages	6
Journal	Astrophysical Journal
Volume	447
Issue number	2
DOIs	https://doi.org/10.1086/175924
State	Published - 10 Jul 1995

Keywords

Stars: individual (G226-29)
Stars: oscillations
Stars: rotation
White dwarfs

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10.1086/175924

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Kepler, S. O., Giovannini, O., Wood, M. A., Nather, R. E., Winget, D. E., Kanaan, A., Kleinman, S. J., Bradley, P. A., Provencal, J. L., Clemens, J. C., Claver, C. F., Watson, T. K., Yanagida, K., Krisciunas, K., Marar, T. M. K., Seetha, S., Ashoka, B. N., Leibowitz, E., Mendelson, H., ... Chen, A. L. (1995). Whole earth telescope observations of the dav white dwarf G226-29. Astrophysical Journal, 447(2), 874-879. https://doi.org/10.1086/175924

@article{c3b10fab25d847469ae15dadea220430,

title = "Whole earth telescope observations of the dav white dwarf G226-29",

abstract = "We observed G226 - 29 for 121 hr in 1992 February and confirm the presence of the three previously identified frequencies close to 109 s. We find no evidence of other pulsation periods down to our noise level of about 0.35 millimodulation amplitudes. The presence of only one triplet pulsation mode in G226 - 29 and its effective temperature near the blue edge of the instability strip identify the observed triplet of modes near 109 s as rotationally split components of the k = 1, l = 1 mode. With the mode identification, we derived a rotation period of 8.9 hr and an inclination of the pulsation axis of 70°-75° to our line of sight.",

keywords = "Stars: individual (G226-29), Stars: oscillations, Stars: rotation, White dwarfs",

author = "Kepler, {S. O.} and O. Giovannini and Wood, {M. A.} and Nather, {R. E.} and Winget, {D. E.} and A. Kanaan and Kleinman, {S. J.} and Bradley, {P. A.} and Provencal, {J. L.} and Clemens, {J. C.} and Claver, {C. F.} and Watson, {T. K.} and K. Yanagida and K. Krisciunas and Marar, {T. M.K.} and S. Seetha and Ashoka, {B. N.} and E. Leibowitz and H. Mendelson and T. Mazeh and P. Moskalik and J. Krzesi{\'n}ski and G. Pajdosz and S. Zo{\l}a and Solheim, {J. E.} and Emanuelsen, {P. I.} and N. Dolez and G. Vauclair and M. Chevreton and Fremy, {J. R.} and Barstow, {M. A.} and Sansom, {A. E.} and Tweedy, {R. W.} and Wickramasinghe, {D. T.} and L. Ferrario and Sullivan, {D. J.} and {Van Der Peet}, {A. J.} and Buckley, {D. A.H.} and Chen, {A. L.}",

year = "1995",

month = jul,

day = "10",

doi = "10.1086/175924",

language = "אנגלית",

volume = "447",

pages = "874--879",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

Kepler, SO, Giovannini, O, Wood, MA, Nather, RE, Winget, DE, Kanaan, A, Kleinman, SJ, Bradley, PA, Provencal, JL, Clemens, JC, Claver, CF, Watson, TK, Yanagida, K, Krisciunas, K, Marar, TMK, Seetha, S, Ashoka, BN, Leibowitz, E, Mendelson, H, Mazeh, T, Moskalik, P, Krzesiński, J, Pajdosz, G, Zoła, S, Solheim, JE, Emanuelsen, PI, Dolez, N, Vauclair, G, Chevreton, M, Fremy, JR, Barstow, MA, Sansom, AE, Tweedy, RW, Wickramasinghe, DT, Ferrario, L, Sullivan, DJ, Van Der Peet, AJ, Buckley, DAH & Chen, AL 1995, 'Whole earth telescope observations of the dav white dwarf G226-29', Astrophysical Journal, vol. 447, no. 2, pp. 874-879. https://doi.org/10.1086/175924

TY - JOUR

T1 - Whole earth telescope observations of the dav white dwarf G226-29

AU - Kepler, S. O.

AU - Giovannini, O.

AU - Wood, M. A.

AU - Nather, R. E.

AU - Winget, D. E.

AU - Kanaan, A.

AU - Kleinman, S. J.

AU - Bradley, P. A.

AU - Provencal, J. L.

AU - Clemens, J. C.

AU - Claver, C. F.

AU - Watson, T. K.

AU - Yanagida, K.

AU - Krisciunas, K.

AU - Marar, T. M.K.

AU - Seetha, S.

AU - Ashoka, B. N.

AU - Leibowitz, E.

AU - Mendelson, H.

AU - Mazeh, T.

AU - Moskalik, P.

AU - Krzesiński, J.

AU - Pajdosz, G.

AU - Zoła, S.

AU - Solheim, J. E.

AU - Emanuelsen, P. I.

AU - Dolez, N.

AU - Vauclair, G.

AU - Chevreton, M.

AU - Fremy, J. R.

AU - Barstow, M. A.

AU - Sansom, A. E.

AU - Tweedy, R. W.

AU - Wickramasinghe, D. T.

AU - Ferrario, L.

AU - Sullivan, D. J.

AU - Van Der Peet, A. J.

AU - Buckley, D. A.H.

AU - Chen, A. L.

PY - 1995/7/10

Y1 - 1995/7/10

N2 - We observed G226 - 29 for 121 hr in 1992 February and confirm the presence of the three previously identified frequencies close to 109 s. We find no evidence of other pulsation periods down to our noise level of about 0.35 millimodulation amplitudes. The presence of only one triplet pulsation mode in G226 - 29 and its effective temperature near the blue edge of the instability strip identify the observed triplet of modes near 109 s as rotationally split components of the k = 1, l = 1 mode. With the mode identification, we derived a rotation period of 8.9 hr and an inclination of the pulsation axis of 70°-75° to our line of sight.

AB - We observed G226 - 29 for 121 hr in 1992 February and confirm the presence of the three previously identified frequencies close to 109 s. We find no evidence of other pulsation periods down to our noise level of about 0.35 millimodulation amplitudes. The presence of only one triplet pulsation mode in G226 - 29 and its effective temperature near the blue edge of the instability strip identify the observed triplet of modes near 109 s as rotationally split components of the k = 1, l = 1 mode. With the mode identification, we derived a rotation period of 8.9 hr and an inclination of the pulsation axis of 70°-75° to our line of sight.

KW - Stars: individual (G226-29)

KW - Stars: oscillations

KW - Stars: rotation

KW - White dwarfs

UR - http://www.scopus.com/inward/record.url?scp=11944271956&partnerID=8YFLogxK

U2 - 10.1086/175924

DO - 10.1086/175924

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AN - SCOPUS:11944271956

SN - 0004-637X

VL - 447

SP - 874

EP - 879

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Whole earth telescope observations of the dav white dwarf G226-29

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