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451. 5969 Southern Reference Stars and 726 Bright stars
ID:
ivo://CDS.VizieR/I/309
Title:
5969 Southern Reference Stars and 726 Bright stars
Short Name:
I/309
Date:
21 Oct 2021
Publisher:
CDS
Description:
The catalogue contains 5969 southern reference stars (SRS) and 726 bright stars (BS). The observations were carried out in the declination zone from 0{deg} to -20{deg} with the Repsold meridian circle in Nikolaev Astronomical Observatory (Ukraine) in 1964-1966. The RMS errors of right ascensions are 18ms and 25ms for the SRS and the BS correspondingly. The RMS errors of declinations are 480mas and 470mas for the SRS and the BS correspondingly. The catalogue is in good agreement with a system of the FK4.
452. Spatially offset AGN cand. in CLASS survey
ID:
ivo://CDS.VizieR/J/MNRAS/475/5179
Title:
Spatially offset AGN cand. in CLASS survey
Short Name:
J/MNRAS/475/5179
Date:
02 Nov 2021 11:24:39
Publisher:
CDS
Description:
Prompted by a recent claim by Barrows et al. that X-ray active galactic nuclei (AGNs) are often found significantly offset from the centres of their host galaxies, we have looked for examples of compact radio sources that are offset from the optical centroids of nearby (z<0.2) galaxies. We have selected a sample of 345 galaxies from the Sloan Digital Sky Survey (SDSS) galaxy catalogue, which have nearby compact radio sources listed in the Cosmic-Lens All Sky Survey (CLASS) catalogue. We find only three matches ~0.87 per cent of the sample) with offsets greater than 600 milliarcsec (mas), which is considerably fewer than we would have expected from the Barrows et al. X-ray survey. We fit our histogram of offsets with a Rayleigh distribution with {sigma}=60.5mas, but find that there is an excess of objects with separations greater than ~150mas. Assuming that this excess represents AGNs with real offsets, we place an upper limit of ~17 per cent on the fraction of offset AGNs in our radio-selected sample. We select 38 objects with offsets greater than 150mas, and find they have some diverse properties: Some are well known, such as Mrk 273 and Arp 220, some have dust lanes, which may have affected the optical astrometry, and a few are strong new candidates for offset AGNs.
453. Speckle interferometry at SOAR in 2020
ID:
ivo://CDS.VizieR/J/AJ/162/41
Title:
Speckle interferometry at SOAR in 2020
Short Name:
J/AJ/162/41
Date:
14 Mar 2022 06:54:42
Publisher:
CDS
Description:
The results of speckle interferometric observations at the 4.1m Southern Astrophysical Research Telescope in 2020, as well as earlier unpublished data, are given, totaling 1735 measurements of 1288 resolved pairs and nonresolutions of 1177 targets. We resolved for the first time 59 new pairs or subsystems in known binaries, mostly among nearby dwarf stars. This work continues our long-term speckle program. Its main goal is to monitor orbital motion of close binaries, including members of high-order hierarchies and Hipparcos pairs in the solar neighborhood. We also report observations of 892 members of young moving groups and associations, where we resolved 103 new pairs.
454. Speckle interferometry of Ap stars
ID:
ivo://CDS.VizieR/J/other/AstBu/67.44
Title:
Speckle interferometry of Ap stars
Short Name:
J/other/AstBu/67
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of speckle interferometry of a sample of 117 chemically peculiar stars with global magnetic fields. The observations were made in December 2009 at the BTA with a spatial resolution of about 0.02 arcseconds in the visual spectral region. Twenty-nine stars were resolved into individual components, 14 of them for the first time (HD965, HD5797, HD8855, HD10783, HD16605, HD21699, HD35502, HD51418, HD64486, HD79158, HD103498, HD108651, HD213918, HD293764). In twelve cases a companion turned out to be 2-4 magnitudes fainter than the main component - a magnetic star. Young hot Bp stars HD35502 and HD213918 are exceptions, since their companions are fainter by about 1 magnitude. In all cases, the linear distance from a star to its companion at the epoch of observations in the picture plane exceeded 10^9^km. Eighty-eight magnetic CP stars revealed no secondary components within our study. Thus, the fraction of speckle interferometric binaries in our sample amounts to 25%.
455. Speckle interferometry of Ap stars. II.
ID:
ivo://CDS.VizieR/J/other/AstBu/69.296
Title:
Speckle interferometry of Ap stars. II.
Short Name:
J/other/AstBu/69
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of speckle interferometric observations of 156 stars possessing global magnetic fields, carried out with the 6-m BTA telescope of the Special Astrophysical Observatory. Virtually all stars were observed between 2010 and 2012. Thirty-four stars were resolved into individual components (31 double and 3 triple), of which 14 binary systems (BD+41 43, HD2887, HD30466, HD36540, HD36955, HD37479, HD61045, HD89069, HD144334, HD164258, HD349321, HD343872, HD184471, HD196691) and 2 triple systems (HD37140, HD338226) were for the first time resolved by the astrometric method.
456. Speckle interferometry of HIP binaries
ID:
ivo://CDS.VizieR/J/AJ/121/3224
Title:
Speckle interferometry of HIP binaries
Short Name:
J/AJ/121/3224
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Hipparcos satellite made measurements of over 9734 known double stars, 3406 new double stars, and 11,687 unresolved but possible double stars. The high angular resolution afforded by speckle interferometry makes it an efficient means to confirm these systems from the ground, which were first discovered from space. Because of its coverage of a different region of angular separation-magnitude difference ({rho}-{Delta}m) space, speckle interferometry also holds promise to ascertain the duplicity of the unresolved Hipparcos "problem" stars. Presented are observations of 116 new Hipparcos double stars and 469 Hipparcos "problem stars," as well as 238 measures of other double stars and 246 other high-quality nondetections. Included in these are observations of double stars listed in the Tycho-2 Catalogue and possible grid stars for the Space Interferometry Mission.
457. Speckle interfero. nearby multiple stars. II
ID:
ivo://CDS.VizieR/J/AJ/162/156
Title:
Speckle interfero. nearby multiple stars. II
Short Name:
J/AJ/162/156
Date:
14 Mar 2022 06:50:24
Publisher:
CDS
Description:
Long-term monitoring at the 6m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences made it possible to improve the orbits of 15 objects (HIP689, HIP3951, HIP10438, HIP43948, HIP69962, HIP95995, HIP102029, HIP102357, HIP104383, HIP105947, HIP106255, HIP108917, HIP111546, HIP113726, HIP114922) and construct an orbital solution for HIP65327 for the first time. Observations have been carried out since 2007; that is, the accumulated data correspond to an interval of 13yr. As a result, most of the orbits were classified as "accurate" using the qualitative criteria by Worley & Heintz. A comparison of the mass sums and masses of the components calculated by two independent methods was made for objects with orbital solutions. The Gaia EDR3 parallax was used to obtain the fundamental parameters, as well as the Hipparcos and Gaia DR2 parallaxes.
458. Spectroscopic survey of 479 thick disc stars
ID:
ivo://CDS.VizieR/J/A+A/535/A107
Title:
Spectroscopic survey of 479 thick disc stars
Short Name:
J/A+A/535/A107
Date:
21 Oct 2021
Publisher:
CDS
Description:
In the era of large spectroscopic surveys, Galactic archaeology aims to understand the formation and evolution of the Milky Way by means of large datasets. In particular, the kinematic and chemical study of the thick disc can give valuable information on the merging history of the Milky Way. Our aim is to detect and characterise the Galactic thick disc chemically and dynamically by analysing F, G and K stars, whose atmospheres reflect their initial chemical composition. We performed a spectroscopic survey of nearly 700 stars probing the Galactic thick disc far from the solar neighbourhood towards the Galactic coordinates (l~277{deg}, b~47{deg}). The derived effective temperatures, surface gravities and overall metallicities were then combined with stellar evolution isochrones, radial velocities and proper motions to derive the distances, kinematics and orbital parameters of the sample stars. The targets belonging to each Galactic component (thin disc, thick disc, halo) were selected either on their kinematics or according to their position above the Galactic plane, and the vertical gradients were also estimated.
459. SPF1 Catalogue
ID:
ivo://CDS.VizieR/I/82
Title:
SPF1 Catalogue
Short Name:
I/82
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
460. SPF3 Catalogue
ID:
ivo://CDS.VizieR/I/78
Title:
SPF3 Catalogue
Short Name:
I/78
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)

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