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; Y. I. 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; S. L. Marshall; R. Porrata; P. Protopapas; J. A. Rice; M. E. Schwamb; S. Y. Wang; C. Y. Wen

doi:10.1086/598968

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, Y. I. Byun, N. K. Coehlo, K. H. Cook, R. Dave, I. De Pater, P. Descamps, M. J. Lehner, D. W. Kim, T. Lee, J. J. LissauerS. L. Marshall, R. Porrata, P. Protopapas, J. A. Rice, M. E. Schwamb, S. Y. Wang, C. Y. Wen

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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.

Original language	English
Pages (from-to)	359-364
Number of pages	6
Journal	Publications of the Astronomical Society of the Pacific
Volume	121
Issue number	878
DOIs	https://doi.org/10.1086/598968
Publication status	Published - 2009 Apr

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Lin, C. L., Zhang, Z. W., Chen, W. P., King, S. K., Lin, H. C., Wang, J. H., Mondal, S., Alcock, C., Axelrod, T., Bianco, F. B., Byun, Y. I., Coehlo, N. K., Cook, K. H., Dave, R., De Pater, I., Descamps, P., Lehner, M. J., Kim, D. W., Lee, T., ... 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

@article{3dd8a8f9f0a14f1bae3b95e78a20cb08,

title = "A close binary star resolved from occultation by 87 sylvia",

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 Byun, {Y. I.} 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.}",

year = "2009",

month = apr,

doi = "10.1086/598968",

language = "English",

volume = "121",

pages = "359--364",

journal = "Publications of the Astronomical Society of the Pacific",

issn = "0004-6280",

publisher = "University of Chicago",

number = "878",

}

Lin, CL, Zhang, ZW, Chen, WP, King, SK, Lin, HC, Wang, JH, Mondal, S, Alcock, C, Axelrod, T, Bianco, FB, Byun, YI, 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

TY - JOUR

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, Y. I.

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

Y1 - 2009/4

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.

AB - 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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U2 - 10.1086/598968

DO - 10.1086/598968

M3 - Article

AN - SCOPUS:67650683032

SN - 0004-6280

VL - 121

SP - 359

EP - 364

JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

IS - 878

ER -

A close binary star resolved from occultation by 87 sylvia

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