Observational limits on companions to G29-38

S. J. Kleinman; R. E. Nather; D. E. Winget; J. C. Clemens; P. A. Bradley; A. Kanaan; J. L. Provencal; C. F. Claver; T. K. Watson; K. Yanagida; J. S. Dixson; M. A. Wood; D. J. Sullivan; E. Meištas; E. M. Leibowitz; P. Moskalik; S. Zola; G. Pajdosz; J. Krzesinski; J. E. Solheim; A. Bruvold; D. O'Donoghue; M. Katz; G. Vauclair; N. Dolez; M. Chevreton; M. A. Barstow; S. O. Kepler; O. Giovannini; C. J. Hansen; S. D. Kawaler

doi:10.1086/174965

Observational limits on companions to G29-38

S. J. Kleinman^*, R. E. Nather, D. E. Winget, J. C. Clemens, P. A. Bradley, A. Kanaan, J. L. Provencal, C. F. Claver, T. K. Watson, K. Yanagida, J. S. Dixson, M. A. Wood, D. J. Sullivan, E. Meištas, E. M. Leibowitz, P. Moskalik, S. Zola, G. Pajdosz, J. Krzesinski, J. E. SolheimA. Bruvold, D. O'Donoghue, M. Katz, G. Vauclair, N. Dolez, M. Chevreton, M. A. Barstow, S. O. Kepler, O. Giovannini, C. J. Hansen, S. D. Kawaler

^*Corresponding author for this work

School of Physics and Astronomy

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Abstract

Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain.

Original language	English
Pages (from-to)	875-884
Number of pages	10
Journal	Astrophysical Journal
Volume	436
Issue number	2
DOIs	https://doi.org/10.1086/174965
State	Published - 1 Dec 1994

Keywords

Binaries: general
Stars: individual (G29-38)
Stars: low-mass, brown dwarfs
Stars: oscillations
White dwarfs

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Kleinman, S. J., Nather, R. E., Winget, D. E., Clemens, J. C., Bradley, P. A., Kanaan, A., Provencal, J. L., Claver, C. F., Watson, T. K., Yanagida, K., Dixson, J. S., Wood, M. A., Sullivan, D. J., Meištas, E., Leibowitz, E. M., Moskalik, P., Zola, S., Pajdosz, G., Krzesinski, J., ... Kawaler, S. D. (1994). Observational limits on companions to G29-38. Astrophysical Journal, 436(2), 875-884. https://doi.org/10.1086/174965

@article{5cc6b317f9c943a39dcff4afae3f8dee,

title = "Observational limits on companions to G29-38",

abstract = "Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain.",

keywords = "Binaries: general, Stars: individual (G29-38), Stars: low-mass, brown dwarfs, Stars: oscillations, White dwarfs",

author = "Kleinman, {S. J.} and Nather, {R. E.} and Winget, {D. E.} and Clemens, {J. C.} and Bradley, {P. A.} and A. Kanaan and Provencal, {J. L.} and Claver, {C. F.} and Watson, {T. K.} and K. Yanagida and Dixson, {J. S.} and Wood, {M. A.} and Sullivan, {D. J.} and E. Mei{\v s}tas and Leibowitz, {E. M.} and P. Moskalik and S. Zola and G. Pajdosz and J. Krzesinski and Solheim, {J. E.} and A. Bruvold and D. O'Donoghue and M. Katz and G. Vauclair and N. Dolez and M. Chevreton and Barstow, {M. A.} and Kepler, {S. O.} and O. Giovannini and Hansen, {C. J.} and Kawaler, {S. D.}",

year = "1994",

month = dec,

day = "1",

doi = "10.1086/174965",

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Kleinman, SJ, Nather, RE, Winget, DE, Clemens, JC, Bradley, PA, Kanaan, A, Provencal, JL, Claver, CF, Watson, TK, Yanagida, K, Dixson, JS, Wood, MA, Sullivan, DJ, Meištas, E, Leibowitz, EM, Moskalik, P, Zola, S, Pajdosz, G, Krzesinski, J, Solheim, JE, Bruvold, A, O'Donoghue, D, Katz, M, Vauclair, G, Dolez, N, Chevreton, M, Barstow, MA, Kepler, SO, Giovannini, O, Hansen, CJ & Kawaler, SD 1994, 'Observational limits on companions to G29-38', Astrophysical Journal, vol. 436, no. 2, pp. 875-884. https://doi.org/10.1086/174965

TY - JOUR

T1 - Observational limits on companions to G29-38

AU - Kleinman, S. J.

AU - Nather, R. E.

AU - Winget, D. E.

AU - Clemens, J. C.

AU - Bradley, P. A.

AU - Kanaan, A.

AU - Provencal, J. L.

AU - Claver, C. F.

AU - Watson, T. K.

AU - Yanagida, K.

AU - Dixson, J. S.

AU - Wood, M. A.

AU - Sullivan, D. J.

AU - Meištas, E.

AU - Leibowitz, E. M.

AU - Moskalik, P.

AU - Zola, S.

AU - Pajdosz, G.

AU - Krzesinski, J.

AU - Solheim, J. E.

AU - Bruvold, A.

AU - O'Donoghue, D.

AU - Katz, M.

AU - Vauclair, G.

AU - Dolez, N.

AU - Chevreton, M.

AU - Barstow, M. A.

AU - Kepler, S. O.

AU - Giovannini, O.

AU - Hansen, C. J.

AU - Kawaler, S. D.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain.

AB - Recent interest in the variable (DAV) white dwarf G29-38 has been stirred by a tentative report of a radial velocity variation that may be due to an unseen companion. Earlier evidence for a brown dwarf in the system has come from an observed infrared excess in the star's spectrum. For asteroseismological reasons, we have accumulated more than five seasons of high-speed photometric data on the star. By measuring the phase of an isolated, stable frequency in the power spectrum, we show the measured variation is not due (at least in its entirety) to an orbital companion. Because any orbital radial velocity variation must result in a systematic phase variation, the data we present can be used to place stringent limits on the types of companions the system may contain.

KW - Binaries: general

KW - Stars: individual (G29-38)

KW - Stars: low-mass, brown dwarfs

KW - Stars: oscillations

KW - White dwarfs

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DO - 10.1086/174965

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SN - 0004-637X

VL - 436

SP - 875

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JO - Astrophysical Journal

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Observational limits on companions to G29-38

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Keywords

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