A close binary star resolved from occultation by 87 sylvia

Chi Long Lin, Zhi Wei Zhang, W. P. Chen, Sun Kun King, Hung Chin Lin, J. H. Wang, S. Mondal, C. Alcock, T. Axelrod, F. B. Bianco, Yong-Ik Byun, N. K. Coehlo, K. H. Cook, R. Dave, I. De Pater, P. Descamps, M. J. Lehner, D. W. Kim, T. Lee, J. J. Lissauer & 7 others S. L. Marshall, R. Porrata, P. Protopapas, J. A. Rice, M. E. Schwamb, S. Y. Wang, C. Y. Wen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The star BD +29 1748 was resolved to be a close binary from its occultation by the asteroid 87 Sylvia on 2006 December 18 UT. Four telescopes were used to observe this event at two sites separated by some 80 km. Two flux drops were observed at one site, whereas only one flux drop was detected at the other. From the long-term variation of Sylvia, we inferred the probable shape of the shadow during the occultation, and this in turn constrains the binary parameters: the two components of BD +29 1748 have a projected separation of 0″097-0″140 on the sky with a position angle 104°-110°. The asteroid was clearly resolved, with a size scale ranging from 130 to 290 km as projected onto the occultation direction, consistent with the size dimensions 385 × 265 × 230 km, measured by direct adaptive optics imaging. No occultation was detected for either of the two known moonlets of 87 Sylvia.

Original languageEnglish
Pages (from-to)359-364
Number of pages6
JournalPublications of the Astronomical Society of the Pacific
Volume121
Issue number878
DOIs
Publication statusPublished - 2009 Apr 1

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binary stars
occultation
asteroid
asteroids
moonlets
adaptive optics
sky
telescopes
stars
parameter

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Lin, C. L., Zhang, Z. W., Chen, W. P., King, S. K., Lin, H. C., Wang, J. H., ... Wen, C. Y. (2009). A close binary star resolved from occultation by 87 sylvia. Publications of the Astronomical Society of the Pacific, 121(878), 359-364. https://doi.org/10.1086/598968
Lin, Chi Long ; Zhang, Zhi Wei ; Chen, W. P. ; King, Sun Kun ; Lin, Hung Chin ; Wang, J. H. ; Mondal, S. ; Alcock, C. ; Axelrod, T. ; Bianco, F. B. ; Byun, Yong-Ik ; Coehlo, N. K. ; Cook, K. H. ; Dave, R. ; De Pater, I. ; Descamps, P. ; Lehner, M. J. ; Kim, D. W. ; Lee, T. ; Lissauer, J. J. ; Marshall, S. L. ; Porrata, R. ; Protopapas, P. ; Rice, J. A. ; Schwamb, M. E. ; Wang, S. Y. ; Wen, C. Y. / A close binary star resolved from occultation by 87 sylvia. In: Publications of the Astronomical Society of the Pacific. 2009 ; Vol. 121, No. 878. pp. 359-364.
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abstract = "The star BD +29 1748 was resolved to be a close binary from its occultation by the asteroid 87 Sylvia on 2006 December 18 UT. Four telescopes were used to observe this event at two sites separated by some 80 km. Two flux drops were observed at one site, whereas only one flux drop was detected at the other. From the long-term variation of Sylvia, we inferred the probable shape of the shadow during the occultation, and this in turn constrains the binary parameters: the two components of BD +29 1748 have a projected separation of 0″097-0″140 on the sky with a position angle 104°-110°. The asteroid was clearly resolved, with a size scale ranging from 130 to 290 km as projected onto the occultation direction, consistent with the size dimensions 385 × 265 × 230 km, measured by direct adaptive optics imaging. No occultation was detected for either of the two known moonlets of 87 Sylvia.",
author = "Lin, {Chi Long} and Zhang, {Zhi Wei} and Chen, {W. P.} and King, {Sun Kun} and Lin, {Hung Chin} and Wang, {J. H.} and S. Mondal and C. Alcock and T. Axelrod and Bianco, {F. B.} and Yong-Ik Byun and Coehlo, {N. K.} and Cook, {K. H.} and R. Dave and {De Pater}, I. and P. Descamps and Lehner, {M. J.} and Kim, {D. W.} and T. Lee and Lissauer, {J. J.} and Marshall, {S. L.} and R. Porrata and P. Protopapas and Rice, {J. A.} and Schwamb, {M. E.} and Wang, {S. Y.} and Wen, {C. Y.}",
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Lin, CL, Zhang, ZW, Chen, WP, King, SK, Lin, HC, Wang, JH, Mondal, S, Alcock, C, Axelrod, T, Bianco, FB, Byun, Y-I, Coehlo, NK, Cook, KH, Dave, R, De Pater, I, Descamps, P, Lehner, MJ, Kim, DW, Lee, T, Lissauer, JJ, Marshall, SL, Porrata, R, Protopapas, P, Rice, JA, Schwamb, ME, Wang, SY & Wen, CY 2009, 'A close binary star resolved from occultation by 87 sylvia', Publications of the Astronomical Society of the Pacific, vol. 121, no. 878, pp. 359-364. https://doi.org/10.1086/598968

A close binary star resolved from occultation by 87 sylvia. / Lin, Chi Long; Zhang, Zhi Wei; Chen, W. P.; King, Sun Kun; Lin, Hung Chin; Wang, J. H.; Mondal, S.; Alcock, C.; Axelrod, T.; Bianco, F. B.; Byun, Yong-Ik; Coehlo, N. K.; Cook, K. H.; Dave, R.; De Pater, I.; Descamps, P.; Lehner, M. J.; Kim, D. W.; Lee, T.; Lissauer, J. J.; Marshall, S. L.; Porrata, R.; Protopapas, P.; Rice, J. A.; Schwamb, M. E.; Wang, S. Y.; Wen, C. Y.

In: Publications of the Astronomical Society of the Pacific, Vol. 121, No. 878, 01.04.2009, p. 359-364.

Research output: Contribution to journalArticle

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T1 - A close binary star resolved from occultation by 87 sylvia

AU - Lin, Chi Long

AU - Zhang, Zhi Wei

AU - Chen, W. P.

AU - King, Sun Kun

AU - Lin, Hung Chin

AU - Wang, J. H.

AU - Mondal, S.

AU - Alcock, C.

AU - Axelrod, T.

AU - Bianco, F. B.

AU - Byun, Yong-Ik

AU - Coehlo, N. K.

AU - Cook, K. H.

AU - Dave, R.

AU - De Pater, I.

AU - Descamps, P.

AU - Lehner, M. J.

AU - Kim, D. W.

AU - Lee, T.

AU - Lissauer, J. J.

AU - Marshall, S. L.

AU - Porrata, R.

AU - Protopapas, P.

AU - Rice, J. A.

AU - Schwamb, M. E.

AU - Wang, S. Y.

AU - Wen, C. Y.

PY - 2009/4/1

Y1 - 2009/4/1

N2 - The star BD +29 1748 was resolved to be a close binary from its occultation by the asteroid 87 Sylvia on 2006 December 18 UT. Four telescopes were used to observe this event at two sites separated by some 80 km. Two flux drops were observed at one site, whereas only one flux drop was detected at the other. From the long-term variation of Sylvia, we inferred the probable shape of the shadow during the occultation, and this in turn constrains the binary parameters: the two components of BD +29 1748 have a projected separation of 0″097-0″140 on the sky with a position angle 104°-110°. The asteroid was clearly resolved, with a size scale ranging from 130 to 290 km as projected onto the occultation direction, consistent with the size dimensions 385 × 265 × 230 km, measured by direct adaptive optics imaging. No occultation was detected for either of the two known moonlets of 87 Sylvia.

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