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171. CPASJ1 position corrections
ID:
ivo://CDS.VizieR/J/other/PBeiO/24.71
Title:
CPASJ1 position corrections
Short Name:
J/other/PBeiO/24
Date:
21 Oct 2021
Publisher:
CDS
Description:
Using the data observed with the Photoelectric Astrolabe Mark II (PA II) of the Beijing Astronomical Observatory during the period from Feb. 1992 to Oct. 1993 in San Juan of Argentina, the first catalogue of stars (PASJ1, Cat. <J/A+AS/118/1>) have been compiled. It consists of 1400 stars included 682 FK5/FK4 Supp stars. 433 FK5 Ext stars and 285 CAMC stars (1, 1989). The mean precisions of delta alpha's and delta delta's are +/-3.2ms and 0.055", respectively. The mean epoch is 1992.9. Finally, systematic corrections of (PASJ1-FK5) are given.
172. de Houtman, Kepler and Halley star catalogs
ID:
ivo://CDS.VizieR/J/A+A/530/A93
Title:
de Houtman, Kepler and Halley star catalogs
Short Name:
J/A+A/530/A93
Date:
21 Oct 2021
Publisher:
CDS
Description:
de Houtman in 1603, Kepler in 1627 and Halley in 1679 published the earliest modern catalogues of the southern sky. We provide machine-readable versions of these catalogues, make some comparisons between them, and briefly discuss their accuracy on the basis of comparison with data from the modern Hipparcos Catalogue. We also compare our results for de Houtman with those by Knobel (1917) finding good overall agreement. About half of the about 200 new stars (with respect to Ptolemaios) added by de Houtman are in twelve new constellations, half in old constellations like Centaurus, Lupus and Argo. The right ascensions and declinations given by de Houtman have error distributions with widths of about 40-arcmin, the longitudes and latitudes given by Kepler have error distributions with widths of about 45-arcmin. Halley improves on this by more than an order of magnitude to widths of about 3-arcmin, and all entries in his catalogue can be identified. The measurement errors of Halley are due to a systematic deviation of his sextant (increasing with angle to 2-arcmin at 60-degrees) and random errors of 0.7-arcmin. The position errors in the catalogue of Halley are dominated by the position errors in the reference stars, which he took from Brahe.
173. Determining true mass of RV exoplanets with Gaia
ID:
ivo://CDS.VizieR/J/A+A/645/A7
Title:
Determining true mass of RV exoplanets with Gaia
Short Name:
J/A+A/645/A7
Date:
21 Oct 2021
Publisher:
CDS
Description:
Mass is one of the most important parameters for determining the true nature of an astronomical object. Yet, many published exoplan- ets lack a measurement of their true mass, in particular those detected as a result of radial-velocity (RV) variations of their host star. For those examples, only the minimum mass, or msini, is known, owing to the insensitivity of RVs to the inclination of the detected orbit compared to the plane of the sky. The mass that is given in databases is generally that of an assumed edge-on system (~90{deg}), but many other inclinations are possible, even extreme values closer to 0{deg} (face-on). In such a case, the mass of the published object could be strongly underestimated by up to two orders of magnitude. In the present study, we use GASTON, a recently developed tool taking advantage of the voluminous Gaia astrometric database to constrain the inclination and true mass of several hundreds of published exoplanet candidates. We find 9 exoplanet candidates in the stellar or brown dwarf (BD) domain, among which 6 were never characterized. We show that 30 Ari B b, HD 141937 b, HD 148427 b, HD 6718 b, HIP 65891 b, and HD 16760 b have masses larger than 13.5 M_J_ at 3{sigma}. We also confirm the planetary nature of 27 exoplanets, including HD 10180 c, d and g. Studying the orbital periods, eccentricities, and host-star metallicities in the BD domain, we found distributions with respect to true masses consistent with other publications. The distribution of orbital periods shows of a void of BD detections below ~100d, while eccentricity and metallicity distributions agree with a transition between BDs similar to planets and BDs similar to stars in the range 40-50M_J_.
174. Differential astrometry of {delta} Equulei
ID:
ivo://CDS.VizieR/J/AJ/130/2866
Title:
Differential astrometry of {delta} Equulei
Short Name:
J/AJ/130/2866
Date:
21 Oct 2021
Publisher:
CDS
Description:
Delta Equulei is among the most well-studied nearby binary star systems. Results of its observation have been applied to a wide range of fundamental studies of binary systems and stellar astrophysics. It is widely used to calibrate and constrain theoretical models of the physics of stars. We report 27 high-precision differential astrometry measurements of {delta} Equ from the Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES).
175. Dislodged AGNs
ID:
ivo://CDS.VizieR/J/ApJ/835/L30
Title:
Dislodged AGNs
Short Name:
J/ApJ/835/L30
Date:
21 Oct 2021
Publisher:
CDS
Description:
We investigate a sample of 2293 ICRF2 extragalactic radio-loud sources with accurate positions determined by VLBI, mostly active galactic nuclei (AGNs) and quasars, which are cross-matched with optical sources in the first Gaia release (Gaia DR1). The distribution of offsets between the VLBI sources and their optical counterparts is strongly non-Gaussian, with powerful wings extending beyond 1 arcsec. Limiting our analysis to only high-confidence difference detections, we find (and publish) a list of 188 objects with normalized variances above 12 and offsets below 1 arcsec. Pan-STARRS stacked and monochromatic images resolve some of these sources, indicating the presence of double sources, confusion sources, or pronounced extended structures. Some 89 high-quality objects, however, do not show any perturbations and appear to be star-like single sources, yet they are displaced by multiples of the expected error from the radio-loud AGN. We conclude that a fraction of luminous AGNs (more than 4%) can be physically dislodged from the optical centers of their parent galaxies.
176. Dolidze S, C, and MS stars positions
ID:
ivo://CDS.VizieR/J/other/IBVS/5185
Title:
Dolidze S, C, and MS stars positions
Short Name:
J/other/IBVS/518
Date:
21 Oct 2021
Publisher:
CDS
Description:
In the course of other work I have obtained complete identifications for a problematic list of late-type stars by Dolidze (1975AbaOB..47....3D). The charts were used to make the identifications. Since numerous substantial errors were found that have propagated elsewhere in the literature, it was thought useful to publish the list separately. The corrections allow linkage of the stars to other catalogues in the visible and infrared. This complements a second similar list of late-M stars by Dolidze (Dolidze, 1975AbaOB..47..171D, Skiff, 1997IBVS.4417....1S).
177. Double star CCD observations
ID:
ivo://CDS.VizieR/J/MNRAS/259/563
Title:
Double star CCD observations
Short Name:
J/MNRAS/259/563
Date:
21 Oct 2021
Publisher:
CDS
Description:
(no description available)
178. Double star measurements
ID:
ivo://CDS.VizieR/J/A+AS/106/377
Title:
Double star measurements
Short Name:
J/A+AS/106/377
Date:
21 Oct 2021
Publisher:
CDS
Description:
Table 1 gives 1182 measurements of 682 binaries observed with the 74 and 50 cm refractors. Table 2 lists 26 new binaries discovered with the 50 cm refractor.
179. Double star measurements at Nice Obs.
ID:
ivo://CDS.VizieR/J/A+A/396/933
Title:
Double star measurements at Nice Obs.
Short Name:
J/A+A/396/933
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present (table 1) the measurements of 167 visual double stars, made in 2000 and 2001 with the 50 cm refractor of the Nice Observatory and attached CCD camera, using an algorithm based on the adjustment of a tridimensional mathematical surface. Position angle, angular separation and magnitude difference are given. 33 new binaries (discovered by HIPPARCOS (HDS) or newly determined from Tycho-2 database (TDS)) discovered by Hipparcos were measured.
180. Double stars measurements at Nice Obs.
ID:
ivo://CDS.VizieR/J/A+AS/115/59
Title:
Double stars measurements at Nice Obs.
Short Name:
J/A+AS/115/59
Date:
21 Oct 2021
Publisher:
CDS
Description:
Measures and discoveries of visual double stars made at the Observatoire de la Cote d'Azur at Nice, between 1988 and 1994, with the 50 cm refractor equipped with a filar micrometer and electronic recording device. The programs proposed by J. Dommanget involve the complement of the C.C.D.M. (resolving problems of identification of double stars and of coherency in the Index) and the INput CAtalog Hipparcos (resolution of ambiguities on the binarity and on the position of certain double stars which have seldom or never been observed again from the epoch or their discovery)

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