The first definitive binary orbit determined with the Hubble Space Telescope fine guidance sensors: Wolf 1062 (Gliese 748)

Otto G. Franz; Todd J. Henry; Lawrence H. Wasserman; G. Fritz Benedict; Philip A. Ianna; J. Davy Kirkpatrick; Donald W. McCarthy; Arthur J. Bradley; Raynor L. Duncombe; Laurence W. Fredrick; Paul D. Hemenway; William H. Jefferys; Barbara E. McArthur; Edmund P. Nelan; Peter J. Shelus; Darrell B. Story; William F. Van Altena; Arthur L. Whipple

doi:10.1086/300500

The first definitive binary orbit determined with the Hubble Space Telescope fine guidance sensors: Wolf 1062 (Gliese 748)

Otto G. Franz
, Todd J. Henry
, Lawrence H. Wasserman
, G. Fritz Benedict
, Philip A. Ianna
, J. Davy Kirkpatrick
, Donald W. McCarthy
, Arthur J. Bradley
, Raynor L. Duncombe
, Laurence W. Fredrick
, Paul D. Hemenway
, William H. Jefferys
, Barbara E. McArthur
, Edmund P. Nelan
, Peter J. Shelus
, Darrell B. Story
, William F. Van Altena
, Arthur L. Whipple

Steward Observatory

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The M dwarf binary, Wolf 1062 (Gliese 748), has been observed with the Hubble Space Telescope (HST) Fine Guidance Sensor 3 in the transfer function scan mode to determine the apparent orbit. This is the first orbit defined fully and exclusively with HST, and is the most accurate definitive orbit for any resolved, noneclipsing system. The orbital period is 2.4490 ± 0.0119 yr and the semimajor axis is 0″.1470 ± 0″.0007 - both quantities are now known to better than 1%. Using the weighted mean of seven parallax measurements and these HST data, we find the system mass to be 0.543 ± 0.031 M_⊙, where the error of 6% is due almost entirely to the parallax error. An estimated fractional mass from the infrared brightness ratio and infrared mass-luminosity relation yields a mass for the primary of 0.37 M_⊙, and the secondary falls in the regime of very low mass stars, with a mass of only 0.17 M_⊙.

Original language	English (US)
Pages (from-to)	1432-1439
Number of pages	8
Journal	Astronomical Journal
Volume	116
Issue number	3
DOIs	https://doi.org/10.1086/300500
State	Published - Sep 1998

Keywords

Astrometry - binaries
Close - stars
Fundamental parameters - stars
Individual (Wolf 1062) - stars
Low-mass, brown dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/300500

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Franz, O. G., Henry, T. J., Wasserman, L. H., Benedict, G. F., Ianna, P. A., Kirkpatrick, J. D., McCarthy, D. W., Bradley, A. J., Duncombe, R. L., Fredrick, L. W., Hemenway, P. D., Jefferys, W. H., McArthur, B. E., Nelan, E. P., Shelus, P. J., Story, D. B., Van Altena, W. F., & Whipple, A. L. (1998). The first definitive binary orbit determined with the Hubble Space Telescope fine guidance sensors: Wolf 1062 (Gliese 748). Astronomical Journal, 116(3), 1432-1439. https://doi.org/10.1086/300500

Franz, OG, Henry, TJ, Wasserman, LH, Benedict, GF, Ianna, PA, Kirkpatrick, JD, McCarthy, DW, Bradley, AJ, Duncombe, RL, Fredrick, LW, Hemenway, PD, Jefferys, WH, McArthur, BE, Nelan, EP, Shelus, PJ, Story, DB, Van Altena, WF & Whipple, AL 1998, 'The first definitive binary orbit determined with the Hubble Space Telescope fine guidance sensors: Wolf 1062 (Gliese 748)', Astronomical Journal, vol. 116, no. 3, pp. 1432-1439. https://doi.org/10.1086/300500

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abstract = "The M dwarf binary, Wolf 1062 (Gliese 748), has been observed with the Hubble Space Telescope (HST) Fine Guidance Sensor 3 in the transfer function scan mode to determine the apparent orbit. This is the first orbit defined fully and exclusively with HST, and is the most accurate definitive orbit for any resolved, noneclipsing system. The orbital period is 2.4490 ± 0.0119 yr and the semimajor axis is 0″.1470 ± 0″.0007 - both quantities are now known to better than 1\%. Using the weighted mean of seven parallax measurements and these HST data, we find the system mass to be 0.543 ± 0.031 M⊙, where the error of 6\% is due almost entirely to the parallax error. An estimated fractional mass from the infrared brightness ratio and infrared mass-luminosity relation yields a mass for the primary of 0.37 M⊙, and the secondary falls in the regime of very low mass stars, with a mass of only 0.17 M⊙.",

keywords = "Astrometry - binaries, Close - stars, Fundamental parameters - stars, Individual (Wolf 1062) - stars, Low-mass, brown dwarfs",

author = "Franz, \{Otto G.\} and Henry, \{Todd J.\} and Wasserman, \{Lawrence H.\} and Benedict, \{G. Fritz\} and Ianna, \{Philip A.\} and Kirkpatrick, \{J. Davy\} and McCarthy, \{Donald W.\} and Bradley, \{Arthur J.\} and Duncombe, \{Raynor L.\} and Fredrick, \{Laurence W.\} and Hemenway, \{Paul D.\} and Jefferys, \{William H.\} and McArthur, \{Barbara E.\} and Nelan, \{Edmund P.\} and Shelus, \{Peter J.\} and Story, \{Darrell B.\} and \{Van Altena\}, \{William F.\} and Whipple, \{Arthur L.\}",

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AU - Benedict, G. Fritz

AU - Ianna, Philip A.

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AU - McCarthy, Donald W.

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AU - Duncombe, Raynor L.

AU - Fredrick, Laurence W.

AU - Hemenway, Paul D.

AU - Jefferys, William H.

AU - McArthur, Barbara E.

AU - Nelan, Edmund P.

AU - Shelus, Peter J.

AU - Story, Darrell B.

AU - Van Altena, William F.

AU - Whipple, Arthur L.

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N2 - The M dwarf binary, Wolf 1062 (Gliese 748), has been observed with the Hubble Space Telescope (HST) Fine Guidance Sensor 3 in the transfer function scan mode to determine the apparent orbit. This is the first orbit defined fully and exclusively with HST, and is the most accurate definitive orbit for any resolved, noneclipsing system. The orbital period is 2.4490 ± 0.0119 yr and the semimajor axis is 0″.1470 ± 0″.0007 - both quantities are now known to better than 1%. Using the weighted mean of seven parallax measurements and these HST data, we find the system mass to be 0.543 ± 0.031 M⊙, where the error of 6% is due almost entirely to the parallax error. An estimated fractional mass from the infrared brightness ratio and infrared mass-luminosity relation yields a mass for the primary of 0.37 M⊙, and the secondary falls in the regime of very low mass stars, with a mass of only 0.17 M⊙.

AB - The M dwarf binary, Wolf 1062 (Gliese 748), has been observed with the Hubble Space Telescope (HST) Fine Guidance Sensor 3 in the transfer function scan mode to determine the apparent orbit. This is the first orbit defined fully and exclusively with HST, and is the most accurate definitive orbit for any resolved, noneclipsing system. The orbital period is 2.4490 ± 0.0119 yr and the semimajor axis is 0″.1470 ± 0″.0007 - both quantities are now known to better than 1%. Using the weighted mean of seven parallax measurements and these HST data, we find the system mass to be 0.543 ± 0.031 M⊙, where the error of 6% is due almost entirely to the parallax error. An estimated fractional mass from the infrared brightness ratio and infrared mass-luminosity relation yields a mass for the primary of 0.37 M⊙, and the secondary falls in the regime of very low mass stars, with a mass of only 0.17 M⊙.

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KW - Close - stars

KW - Fundamental parameters - stars

KW - Individual (Wolf 1062) - stars

KW - Low-mass, brown dwarfs

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The first definitive binary orbit determined with the Hubble Space Telescope fine guidance sensors: Wolf 1062 (Gliese 748)

Abstract

Keywords

ASJC Scopus subject areas

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