Precision masses of the low-mass binary system GJ 623

Frantz Martinache; James P. Lloyd; Michael J. Ireland; Ryan S. Yamada; Peter G. Tuthill

doi:10.1086/513868

Precision masses of the low-mass binary system GJ 623

Frantz Martinache^*, James P. Lloyd, Michael J. Ireland, Ryan S. Yamada, Peter G. Tuthill

^*Corresponding author for this work

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

39 Citations (Scopus)

Abstract

We have used aperture masking interferometry and adaptive optics (AO) at the Palomar 200 inch telescope to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 yr combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m₁ = 0.371 ± 0.015 M _⊙ (4%) and m₂ = 0.115 ± 0.0023 M _⊙ (2%) for the primary and the secondary, respectively. Models are not consistent with color and mass, requiring very low metallicities.

Original language	English
Pages (from-to)	496-501
Number of pages	6
Journal	Astrophysical Journal
Volume	661
Issue number	1 I
DOIs	https://doi.org/10.1086/513868
Publication status	Published - 20 May 2007
Externally published	Yes

Access to Document

10.1086/513868

Cite this

@article{50f8f146c29b4f548619e7484ea7f3fc,

title = "Precision masses of the low-mass binary system GJ 623",

abstract = "We have used aperture masking interferometry and adaptive optics (AO) at the Palomar 200 inch telescope to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 yr combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m1 = 0.371 ± 0.015 M ⊙ (4%) and m2 = 0.115 ± 0.0023 M ⊙ (2%) for the primary and the secondary, respectively. Models are not consistent with color and mass, requiring very low metallicities.",

author = "Frantz Martinache and Lloyd, {James P.} and Ireland, {Michael J.} and Yamada, {Ryan S.} and Tuthill, {Peter G.}",

year = "2007",

month = may,

day = "20",

doi = "10.1086/513868",

language = "English",

volume = "661",

pages = "496--501",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing",

number = "1 I",

}

TY - JOUR

T1 - Precision masses of the low-mass binary system GJ 623

AU - Martinache, Frantz

AU - Lloyd, James P.

AU - Ireland, Michael J.

AU - Yamada, Ryan S.

AU - Tuthill, Peter G.

PY - 2007/5/20

Y1 - 2007/5/20

N2 - We have used aperture masking interferometry and adaptive optics (AO) at the Palomar 200 inch telescope to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 yr combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m1 = 0.371 ± 0.015 M ⊙ (4%) and m2 = 0.115 ± 0.0023 M ⊙ (2%) for the primary and the secondary, respectively. Models are not consistent with color and mass, requiring very low metallicities.

AB - We have used aperture masking interferometry and adaptive optics (AO) at the Palomar 200 inch telescope to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 yr combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m1 = 0.371 ± 0.015 M ⊙ (4%) and m2 = 0.115 ± 0.0023 M ⊙ (2%) for the primary and the secondary, respectively. Models are not consistent with color and mass, requiring very low metallicities.

UR - http://www.scopus.com/inward/record.url?scp=34249977053&partnerID=8YFLogxK

U2 - 10.1086/513868

DO - 10.1086/513868

M3 - Article

AN - SCOPUS:34249977053

SN - 0004-637X

VL - 661

SP - 496

EP - 501

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

Precision masses of the low-mass binary system GJ 623

Abstract

Access to Document

Other files and links

Fingerprint

Cite this