scholarly journals The mass-ratio distribution of Visual Binary Stars

1990 ◽  
Vol 173 (2) ◽  
pp. 315-342 ◽  
Author(s):  
Sake J. Hogeveen
Keyword(s):  
Binary Stars ◽  
Mass Ratio ◽  
Ratio Distribution ◽  
Visual Binary ◽  
Visual Binary Stars

scholarly journals Pairing function of visual binary stars

2020 ◽  
Vol 501 (1) ◽  
pp. 769-783
Author(s):  
Dmitry Chulkov
Keyword(s):  
Power Law ◽  
Binary Stars ◽  
Mass Function ◽  
Initial Mass Function ◽  
Distance Distribution ◽  
Favourable Result ◽  
Mass Ratio ◽  
Ratio Distribution ◽  
Single Star ◽  
Visual Binary Stars

ABSTRACT An all-sky sample of 1227 visual binaries based on Washington Double Star catalogue is constructed to infer the initial mass function (IMF), mass ratio, and projected distance distribution with a dedicated population synthesis model. Parallaxes from Gaia DR2 and Hipparcos are used to verify the distance distribution. The model is validated on the single-star Tycho-2 sample and successfully reproduces the observed magnitudes and angular separations. The projected separation distribution follows f(s) ∼ s−1.2 in 102–2 × 103  au range for 1–4.5 m⊙ primary stars. Several algorithms are explored as pairing functions. Random pairing is confidently rejected. Primary-constrained pairing (PCP) and split-core pairing (SCP), the scenarios adopting primary component’s or total system’s mass as fundamental, are considered. The preferred IMF slope is α ∼ 2.8 either way. A simple power-law mass ratio distribution is unlikely, but the introduction of a twin excess provides a favourable result. PCP with f(q) ∼ q−1 is preferred with a tiny twin fraction, models with f(q) ∼ q−1.5 are acceptable when a larger twin excess is allowed. SCP is similar to PCP when a larger slope of the power law is adopted: f(q) ∼ qβ + 0.7.

Parallaxes, mass ratios and masses for the visual binary stars BD +75403, ADS 9094 and ADS 9716.

1972 ◽  
Vol 77 ◽  
pp. 251
Author(s):  
J. L. Hershey
Keyword(s):  
Binary Stars ◽  
Visual Binary ◽  
Mass Ratios ◽  
Visual Binary Stars

scholarly journals Speckle Observations of Triple Stars

1992 ◽  
Vol 135 ◽  
pp. 555-557
Author(s):  
Syuzo Isobe ◽  
Naoshi Baba
Keyword(s):  
Binary Stars ◽  
Angular Resolution ◽  
Ccd Camera ◽  
Aging Effect ◽  
Diffraction Limit ◽  
Visual Binary ◽  
San Pedro ◽  
Spectroscopic Binary ◽  
Visual Binary Stars ◽  
Triple Stars

Our speckle observations were started in 1987 using a 212-cm telescope at San Pedro Martir Observatory in Mexico. A D-IMOSS camera was used until 1990 and an I-CCD camera was introduced in 1991. The old camera has only 0″.20 angular resolution because of an aging effect in its intensifier, while the new camera has 0″.06 angular resolution, which is nearly equal to the diffraction limit of the telescope. 128 visual binary stars and 755 spectroscopic binary stars have been observed. The numbers of stars and observations each year are shown in Table 1 and all the observed data are given in a series of papers by Isobe et al. (1990a, 1990b, 1992a) and Miura et al. (1992).

The mass-ratio distribution of spectroscopic binary stars

1992 ◽  
Vol 196 (2) ◽  
pp. 299-336 ◽  
Author(s):  
Sake J. Hogeveen
Keyword(s):  
Binary Stars ◽  
Mass Ratio ◽  
Ratio Distribution ◽  
Spectroscopic Binary

EMCCD Speckle Measurements, Differential Photometry and Dynamical Masses of Visual Binary Stars

2011 ◽  
Author(s):  
V. S. Tamazian ◽  
J. A. Docobo ◽  
Yu. Yu. Balega ◽  
N. D. Melikian ◽  
E. A. Malogolovets ◽  
...  
Keyword(s):  
Binary Stars ◽  
Visual Binary ◽  
Differential Photometry ◽  
Visual Binary Stars ◽  
Dynamical Masses

scholarly journals Orbital elements of five close visual binary stars

2000 ◽  
Vol 321 (4) ◽  
pp. 255-262 ◽  
Author(s):  
M. Scardia ◽  
J.-L. Prieur ◽  
E. Aristidi ◽  
L. Koechlin
Keyword(s):  
Binary Stars ◽  
Orbital Elements ◽  
Visual Binary ◽  
Visual Binary Stars

scholarly journals Determination of the mass-ratio distribution, I: Single-lined spectroscopic binary stars

1992 ◽  
Vol 194 (1) ◽  
pp. 143-157 ◽  
Author(s):  
Sake J. Hogeveen
Keyword(s):  
Binary Stars ◽  
Mass Ratio ◽  
Ratio Distribution ◽  
Spectroscopic Binary

scholarly journals A method to deconvolve mass ratio distribution of binary stars

2014 ◽  
Vol 573 ◽  
pp. A86 ◽  
Author(s):  
Michel Curé ◽  
Diego F. Rial ◽  
Julia Cassetti ◽  
Alejandra Christen ◽  
Henri M. J. Boffin
Keyword(s):  
Binary Stars ◽  
Mass Ratio ◽  
Ratio Distribution

Liminosity distribution function for visual binary stars

1985 ◽  
Vol 110 (1) ◽  
pp. 143-148 ◽  
Author(s):  
Karl D. Rakos
Keyword(s):  
Distribution Function ◽  
Binary Stars ◽  
Visual Binary ◽  
Visual Binary Stars

Masses of Visual Binary Stars

1967 ◽  
Vol 5 (1) ◽  
pp. 105-138 ◽  
Author(s):  
O. J. Eggen
Keyword(s):  
Binary Stars ◽  
Visual Binary ◽  
Visual Binary Stars
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