- ID:
- ivo://CDS.VizieR/J/other/RAA/19.29
- Title:
- Compilation of known QSOs for the Gaia mission
- Short Name:
- J/other/RAA/19.2
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Quasars are essential for astrometric in the sense that they are spatial stationary because of their large distance from the Sun. The European Space Agency (ESA) space astrometric satellite Gaia is scanning the whole sky with unprecedented accuracy up to a few uas level. However, Gaia's two fields of view observations strategy may introduce a parallax bias in the Gaia catalog. Since it presents no significant parallax, quasar is perfect nature object to detect such bias. More importantly, quasars can be used to construct a Celestial Reference Frame in the optical wavelengths in Gaia mission. In this paper, we compile the most reliable quasars existing in literatures.The final compilation (designated as Known Quasars Catalog for Gaia mission, KQCG) contains 1842076 objects, among of them, 797632 objects are found in Gaia DR1 after cross-identifications. This catalog will be very useful in Gaia mission.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/ApJ/887/261
- Title:
- Compilation of planets around M dwarfs
- Short Name:
- J/ApJ/887/261
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- M dwarfs host most of the exoplanets in the local Milky Way. Some of these planets, ranging from sub-Earths to super-Jupiters, orbit in their stars' habitable zones (HZs), although many likely possess surface environments that preclude habitability. Moreover, exomoons around these planets could harbor life for long timescales and thus may also be targets for biosignature surveys. Here we investigate the potential habitability, stability, and detectability of exomoons around exoplanets orbiting M dwarfs. We first compile an updated list of known M-dwarf exoplanet hosts, comprising 109 stars and 205 planets. For each M dwarf, we compute and update precise luminosities with the Virtual Observatory spectral energy distribution Analyzer and Gaia DR2 parallaxes to determine inner and outer boundaries of their HZs. For each planet, we retrieve (or, when necessary, homogeneously estimate) their masses and radii, calculate the long-term dynamical stability of hypothetical moons, and identify those planets that can support habitable moons. We find that 33 exoplanet candidates are located in the HZs of their host stars and that four of them could host Moon- to Titan-mass exomoons for timescales longer than the Hubble time.
- ID:
- ivo://CDS.VizieR/J/A+A/612/L2
- Title:
- Compilation of stellar rotation data
- Short Name:
- J/A+A/612/L2
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The distribution of the stellar rotation axes of 113 main sequence stars in the open cluster Praesepe are examined by using current photometric rotation periods, spectroscopic rotation velocities, and estimated stellar radii. Three different samples of stellar rotation data on spotted stars from the Galactic field and two independent samples of planetary hosts are used as control samples to support the consistency of the analysis. Considering the high completeness of the Praesepe sample and the behavior of the control samples, we find that the main sequence F-K stars in this cluster are susceptible to rotational axis alignment. Using a cone model, the most likely inclination angle is 76+/-14{deg} with a half opening angle of 47+/-24{deg}. Non-isotropic distribution of the inclination angles is preferred over the isotropic distribution, except if the rotation velocities used in this work are systematically overestimated. We found no indication of this being the case on the basis of the currently available data.
- ID:
- ivo://CDS.VizieR/J/ApJ/755/31
- Title:
- Compilation of 122 strong gravitational lenses
- Short Name:
- J/ApJ/755/31
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We study the redshift distribution of two samples of early-type gravitational lenses, extracted from a larger collection of 122 systems, to constrain the cosmological constant in the {Lambda}CDM model and the parameters of a set of alternative dark energy models (XCDM, Dvali-Gabadadze-Porrati, and Ricci dark energy models), in a spatially flat universe. The likelihood is maximized for {Omega}_{Lambda}_=0.70+/-0.09 when considering the sample excluding the Sloan Lens ACS systems (known to be biased toward large image-separation lenses) and no-evolution, and {Omega}_{Lambda}_=0.81+/-0.05 when limiting to gravitational lenses with image separation {Delta}{theta}>2" and no-evolution. In both cases, results accounting for galaxy evolution are consistent within 1{sigma}. The present test supports the accelerated expansion, by excluding the null hypothesis (i.e., {Omega}_{Lambda}_=0) at more than 4{sigma}, regardless of the chosen sample and assumptions on the galaxy evolution. A comparison between competitive world models is performed by means of the Bayesian information criterion. This shows that the simplest cosmological constant model--that has only one free parameter--is still preferred by the available data on the redshift distribution of gravitational lenses. We perform an analysis of the possible systematic effects, finding that the systematic errors due to sample incompleteness, galaxy evolution, and model uncertainties approximately equal the statistical errors, with present-day data. We find that the largest sources of systemic errors are the dynamical normalization and the high-velocity cutoff factor, followed by the faint-end slope of the velocity dispersion function.
- ID:
- ivo://CDS.VizieR/J/ApJS/254/10
- Title:
- Compilation of W UMa stars
- Short Name:
- J/ApJS/254/10
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a statistical study of the largest bibliographic compilation of stellar and orbital parameters of W UMa stars derived by light-curve synthesis with Roche models. The compilation includes nearly 700 individually investigated objects from over 450 distinct publications. Almost 70% of this sample is comprised of stars observed in the past decade that have not been considered in previous statistical studies. We estimate the ages of the cataloged stars, model the distributions of their periods, mass ratios, temperatures, and other quantities, and compare them with the data from the Catalina Real-Time Transient Survey, LAMOST, and Gaia archives. As only a small fraction of the sample has radial-velocity curves, we examine the reliability of the photometric mass ratios in totally and partially eclipsing systems and find that totally eclipsing W UMa stars with photometric mass ratios have the same parameter distributions as those with spectroscopic mass ratios. Most of the stars with reliable parameters have mass ratios below 0.5 and orbital periods shorter than 0.5 days. Stars with longer periods and temperatures above 7000K stand out as outliers and should not be labeled W UMa binaries.
- ID:
- ivo://CDS.VizieR/J/A+A/384/145
- Title:
- Compiled catalog of Per OB2 star forming complex
- Short Name:
- J/A+A/384/145
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Compiled Catalogue (CC) is a photometric and astrometric survey with the center at (RA, DE)_J2000 = (3.86h, 34.6{deg}) and radius of 10 degrees of a nearby region of star formation including the Per OB2 association. The CC is based on recently published astronomical catalogues, e.g. Hipparcos and Tycho-2, and supplemented by relevant astrophysical data from numerous data sources. The CC is complete down to V=11.6mag, in general, and to V=18.5mag in the one square degree field with the IC 348 cluster. The coordinates and proper motions are reduced to the Hipparcos system and the photometry in the Johnson system. Typical accuracies of 1-20mas for coordinates, 1-3mas/yr for proper motions, 0.01-0.05mag for BV magnitudes were achieved for majority of 29452 CC stars (V<12mag). For a large number of stars we also collected parallaxes and spectral classes (about 7000 stars), the R (about 2000 stars), I, J, H, K (about 500 stars) magnitudes, radial velocities (330 stars). Stars in the Compiled Catalogue are sorted in right ascension order.
- ID:
- ivo://CDS.VizieR/J/A+A/384/925
- Title:
- Compiled catalog of stellar data of Miras
- Short Name:
- J/A+A/384/925
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Compiled Catalogue of Mira variables is a result of a merge of the 4th edition of the General Catalogue of Variable Stars (GCVS-4) <II/214A> and present-day high-precision catalogues of space (Hipparcos-Tycho family: Hipparcos <I/239>, Tycho-1 <I/239>, Tycho-2 <I/259>, ACT RC <I/246>, TRC <I/250>) and ground-based (CMC11 <I/256>, PPM-N <I/146>, PPM-S <I/193>, PPM-add <I/208>, Kharchenko 1992) data. The catalogue contains 1103 Miras. Equatorial coordinates were taken from the source catalogues in accordance with the priority: Hipparcos, Tycho-2, Tycho-1, CMC11, PPM, Kharchenko 1992. The proper motions of 1041 Miras are calculated as mean weighted values of source data reduced to the Hipparcos system. The radial velocities of 786 Miras were taken from nine catalogues and lists of Feast (1963MNRAS.125..367F, 1966MNRAS.132..495F), Smak and Preston (1965ApJ...142..943S), Perry and Bidelman (1965PASP...77..214P), Feast et al. (1972MNRAS.158...23F), Dean (1976AJ.....81..364D), Barnes and Fekel (1977Obs....97....1B), Feast et al. (1980MNRAS.190..227F), Barbier-Brossat and Figon (2000) <III/213>, and are given with respect of the absorption lines. For those radial velocities, which were determined from emission lines the correction has been made along with Ikaunieks (1971) relation: VR(abs) - VR(em) = 0.035 * Period. For 724 Miras both proper motions and radial velocities are available. The stars in the Compiled Catalogue are sorted in the same order as in the General Catalogue of Variable Stars.
- ID:
- ivo://CDS.VizieR/J/BaltA/9/646
- Title:
- Compiled Catalogue of Mira-type stars
- Short Name:
- J/BaltA/9/646
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Compiled Catalogue of 1103 Mira type stars is created on the basis of the 4-th edition of the General Catalogue of Variable Stars (GCVS-4, Cat. <II/214>) and present day large high-precision catalogues based on space (Hipparcos-Tycho family catalogues: Hipparcos, Tycho-1 <I/239>, Tycho-2 (<I/259>), ACT RC (Urban et al., 1998AJ....115.2161U), TRC (Cat. <I/250>) and ground-based (CMC11 <I/256>, PPM-N <I/146>, PPM-S <I/193>, PPM-add <I/206>, Kharchenko, 1992, Kinematics and physics of celestial bodies 8, 61) data. Equatorial coordinates were taken from the source catalogues in accordance with the following priority: Hipparcos, Tycho-2, Tycho-1, CMC11, PPM, Kharchenko 1992. The proper motions in the Hipparcos system are calculated for 1041 Miras as mean weighted values of the reduced data from the source catalogues. The radial velocities obtained from absorption lines for 786 Miras were taken from nine catalogues and lists of Feast (1963MNRAS.125..367F, 1966MNRAS.132..495F), Smak and Preston (1965ApJ...142..943S), Perry and Bidelman (1965PASP...77..214P), Feast et al. (1972MNRAS.158...23F), Dean (1976AJ.....81..364D), Barnes and Fekel (1977Obs....97....1B), Feast et al. (1980MNRAS.190..227F), Barbier-Brossat and Figon (2000, Cat. <III/213>). Some radial velocities were determined from emission lines and corrected using the following formula (Ikaunieks, 1971, Long period variable stars, Zinante, Riga): V_R(abs) - V_R(em) = 0.035 * Period. For 724 Miras both proper motions and radial velocities are available. Miras in the Compiled Catalogue are sorted in the same order as in GCVS-4.
- ID:
- ivo://CDS.VizieR/J/A+A/551/A46
- Title:
- Compiled photometry for Cham I and II members
- Short Name:
- J/A+A/551/A46
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of a proper motion study aiming at providing further evidence on the origin of the proposed stellar members of the Chamaeleon I and II clouds and to identify interlopers from the foreground young clusters {epsilon} Cha and {eta} Cha. We compiled lists of spectroscopically confirmed members of the four associations, and of background objects in the same line of sight. Using Virtual Observatory tools, we cross-matched these lists with the UCAC3 (Cat. I/315) catalogue to get proper motions for the objects. In the vector point diagram, we identified the different moving groups, and used this information to study the membership of proposed candidate members of the associations from the literature. For those objects with available radial velocities, we computed their Galactic space velocities. We compiled photometry from public data archives and from the literature for the Cha I and II objects. We looked for correlations between the properties of the objects and their proper motions.
- ID:
- ivo://CDS.VizieR/J/MNRAS/373/521
- Title:
- Complete catalog of planetary nebulae in LMC
- Short Name:
- J/MNRAS/373/521
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper presents accurate homogeneous positions, velocities and other pertinent properties for 460 newly discovered and 169 previously known planetary nebulae (PNe) in the central 25-deg^2^ bar region of the Large Magellanic Cloud (LMC). Candidate emission sources were discovered using a deep, high-resolution H{alpha} map of the LMC obtained by median stacking a dozen 2h H{alpha} exposures taken with the UK Schmidt Telescope (UKST). Our spectroscopic follow-up of more than 2000 compact (i.e. <20arcsec) H{alpha} emission candidates uncovered has tripled the number of PNe in this area. All of the 169 previously known PNe within this region have also been independently recovered and included in this paper to create a homogeneous data set. Of the newly discovered PNe, we classify 291 as 'true', 54 as 'likely' and 115 as 'possible' based on the strength of photometric and spectroscopic evidence. Radial velocities have been measured using both weighted averaging of emission lines and cross-correlation techniques against high-quality templates.