- ID:
- ivo://CDS.VizieR/J/AJ/111/370
- Title:
- Orbits of 37 close visual systems
- Short Name:
- J/AJ/111/370
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- New orbital elements are presented for 37 close visual systems that have been observed and in some cases discovered by speckle interferometry. Periods of these systems range from 5.7 to 425yr, semimajor axes from 0.06" to 1.1". Four of these systems (Kui 18, Fin 325, StF 2597, and McA 77) had no previously published orbital analyses, while elements for a number of other systems have undergone major revisions. Finally, 135 new or revised interferometric measurements of these systems are also presented, as well as 8 negative results.
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- ID:
- ivo://CDS.VizieR/J/AJ/156/194
- Title:
- Orbits of double-lined pairs in multiple stars
- Short Name:
- J/AJ/156/194
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Spectroscopic orbits are computed for inner pairs in nine hierarchical multiple systems (HIP 19639, 60845, 75663, 76816, 78163, 78416, 80448, 84789, and HD 105080) and for one simple binary HIP 61840. All subsystems are double-lined, and their periods range from 2.27 to 30.4 days. Five spectroscopic binaries are twins with equal masses. Each hierarchical system is discussed individually, providing estimates of outer periods, masses, orbital inclination, and axial rotation. For systems with three resolved visual components (HIP 60845 and 80448), the outer and inner visual orbits are determined, complementing the description of their architecture. The radial velocities of HIP 75663A, 76816B, and 78163B are found to be variable with long periods, implying that these hierarchies are 2 + 2 quadruples. The period-eccentricity relation for spectroscopic subsystems is discussed.
- ID:
- ivo://CDS.VizieR/J/AZh/98/239
- Title:
- Orbits of Four Visual Binaries
- Short Name:
- J/AZh/98/239
- Date:
- 22 Feb 2022
- Publisher:
- CDS
- Description:
- We use a modified method of the apparent motion parameters (AMP), in which the initial data from the Gaia DR2 catalog are not only high-precision coordinates, parallaxes, and radial velocities of the components of the studied wide binary stars, but are also their proper motions. The coincidence of the AMP orbits obtained both from the Gaia DR2 data and from the Pulkovo series from 1960-2019 leads to an orbit that is unambiguous in terms of an ascending node. The results for improving the orbits of such visual binaries of the Pulkovo research program as ADS 246, 2757, 10386, and 12169 are presented. Orbits (with periods of 1226, 1075, 4500, and 4900 years), orbital orientation parameters in the Galaxy coordinate frame, and the masses of these systems are obtained (0.59+/-0.05, 1.7+/-0.3, 1.7+/-0.4, and 2.25+/-0.5M_{sun}_). It is shown that dense homogeneous series of ground-based observations, such as CCD observations with the 26-inch refractor of the Pulkovo Observatory, do not lose their relevance, serve as the basis for identifying the best solution based on both Gaia data and our own observations, and should be continued. It was also shown that the Thiele-Innes method is not suitable for determining the orbits of binary stars with a separation of more than 100AU.
- ID:
- ivo://CDS.VizieR/J/A+AS/136/373
- Title:
- Orbits of 8 multiples
- Short Name:
- J/A+AS/136/373
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- New close sub-systems are discovered in 8 visual late-type double stars. Elements of spectroscopic orbits (4 double-lined and 4 single-lined) are given for the components of quadruple systems ADS 1134 and 11163, for the components of triple systems ADS 455, 497, 5436, 8236, 10044, and for the primary of the optical pair ADS 9444. Magnitudes, colors, spectral types, masses of individual components are estimated by combining all available data with Hipparcos parallaxes. Among these stellar systems we note a subdwarf triple ADS 497, an old system with subgiant components ADS 10044, and a visual triple ADS 11163 with additional very low mass (possibly substellar) spectroscopic companion in a 4.6 day orbit. The astrometric orbit of ADS 8236B with a semimajor axis of 30 mas and a period of 4.6 yr may be recoverable from Hipparcos data.
- ID:
- ivo://CDS.VizieR/J/AJ/160/58
- Title:
- Orbits of spectro. binaries with CHARA Array. III.
- Short Name:
- J/AJ/160/58
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the visual orbits of two long-period spectroscopic binary stars, HD8374 and HD24546, using interferometric observations acquired with the Center for High Angular Resolution Astronomy (CHARA) Array and the Palomar Testbed Interferometer. We also obtained new radial velocities from echelle spectra using the APO 3.5m and Fairborn 2.0 telescopes. By combining the visual and spectroscopic observations, we solve for the full, three-dimensional orbits and determine the stellar masses and distances to within 3% uncertainty. We then estimate the effective temperature and radius of each component star through Doppler tomography and spectral energy distribution analyses, in order to compare the observed stellar parameters to the predictions of stellar evolution models. For HD8374, we find masses of M1=1.636{+/-}0.050M{sun} and M2=1.587{+/-}0.049M{sun}, radii of R1=1.84{+/-}0.05R{sun} and R2=1.66{+/-}0.12R{sun}, temperatures of Teff_1_=7280{+/-}110K and Teff-2-=7280{+/-}120K, and an estimated age of 1.0Gyr. For HD24546, we find masses of M1=1.434{+/-}0.014M{sun} and M2=1.409{+/-}0.014M{sun}, radii of R_1_=1.67{+/-}0.06R{sun} and R_2_=1.60{+/-}0.10R{sun}, temperatures of Teff_1_=6790{+/-}120K and Teff_2_=6770{+/-}90K, and an estimated age of 1.4Gyr. HD24546 is therefore too old to be a member of the Hyades cluster, despite its physical proximity to the group.
- ID:
- ivo://CDS.VizieR/J/AJ/158/222
- Title:
- Orbits of subsystems in multiple stars. VI.
- Short Name:
- J/AJ/158/222
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Thirteen spectroscopic orbits of late-type stars are determined from the high-resolution spectra taken with the CHIRON echelle spectrometer at the 1.5 m Cerro Tololo Inter-American Observatory telescope. Most (HIP 14194B, 40523A, 41171A, 51578A, 57572B, 59426A, 62852B, 66438A, 87813B, and 101472A) are inner subsystems in hierarchical multiple stars with three or four components. The periods range from 2.2 to 1131 days. Masses of the components, orbital inclinations, and projected rotation velocities are estimated, and the presence or absence of the lithium line is noted. In addition to those systems, HIP 57021 is a simple 54 day twin binary, and HIP 111598 is a compact triple-lined system with periods of 5.9 and 271 days. This object is likely old, but, nevertheless, the secondary component in the inner pair does not rotate synchronously with the orbit. The period-eccentricity diagram of 528 known inner low-mass spectroscopic subsystems (including 36 from this paper series) is given. The distribution of the inner periods is smooth, without any details around the tidal circularization period of ~10 days.
- ID:
- ivo://CDS.VizieR/J/AJ/156/48
- Title:
- Orbits of subsystems in six multiple stars. III.
- Short Name:
- J/AJ/156/48
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Spectroscopic orbits are computed for inner pairs in six nearby hierarchical multiple systems (HIP 35733, 95106/95110, 105441, 105585/105569, 105947, and 109951). Radial velocities and resolved measurements, when available, are used to derive combined sets of outer orbital elements for three systems. Each multiple system is discussed individually. Additionally, HIP 115087 is a simple 7.9-day single-lined binary. Although the minimum companion mass is substellar (in the brown dwarf desert regime), it appears to be a 0.2 solar-mass star in a low-inclination orbit.
- ID:
- ivo://CDS.VizieR/J/A+A/546/A69
- Title:
- Orbits of visual binaries and dynamical masses
- Short Name:
- J/A+A/546/A69
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Orbital binary stars are essential objects for determining dynamical and physical properties of stars through a combined analysis of photometric and astrometric data. We compiled a set of orbital binaries with known trigonometric parallaxes and orbits of high quality, using data from current versions of the Catalogue of Orbits and Ephemerides of Visual Double Stars and the Sixth Catalog of Orbits of Visual Binary Stars as well as including updated information from WDS and SIMBAD. We constructed distributions of orbital binaries among dynamical mass, period, semi-major axis, and eccentricity of systems, which characterize the set. Some problems related to the parameterization of orbital binaries are also discussed in the paper.
- ID:
- ivo://CDS.VizieR/J/PAZh/45/35
- Title:
- Orbits of 451 wide visual double stars
- Short Name:
- J/PAZh/45/35
- Date:
- 22 Feb 2022
- Publisher:
- CDS
- Description:
- Based on positional observations, we have determined the orbits of 130 visual double stars for the first time and improved the orbits of 321 stars. The histogram of eccentricities for all of the derived orbits corresponds to the relation f=2e. The period distribution has two pronounced maxima at P~200 and 550yr. The ephemeris relative positions and their errors have been calculated for the next three years.
- ID:
- ivo://CDS.VizieR/J/A+A/384/1030
- Title:
- Orientation of orbits in triple stars
- Short Name:
- J/A+A/384/1030
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A sample of visual syb-systems from the Multiple Star Catalog (Tokovinin, 1997, Cat. <J/A+AS/124/75>) is selected where the apparent sense of rotation (prograde or retrograde) at two adjacent hierarchical levels can be determined from observations. This sample is used to compute the sign correlation which, in turn, is related to the average angle between the orbital angular momentum vectors of inner and outer sub-systems. It is shown that the vectors are weakly correlated, and that the correlation decreases with increasing ratio of outer to inner periods.
