- ID:
- ivo://CDS.VizieR/I/292
- Title:
- Pulkovo Visual Double Star Catalogue
- Short Name:
- I/292
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Into the present catalogue the seasonal mean relative positions (rho and theta 2000) are included for 234 visual double stars observed at Pulkovo with 26-inch refractor from 1960 through 2001. This catalogue is a successor of the catalogue dated 1986 [1]. Epoch of equinox is 2000.0. The main aim of these observations is to create the data base for the double star orbit and mass determinations [2]. The stars with the great orbital motion, having longer observation series, were measured in the first line. The photographic and CCD observations of visual double stars are being continued now. The results will be included into the future catalogue. Some stars are accompanied with notes. More full information about visual double stars investigations in the Pulkovo Observatory may be obtained from the articles, the list of references being enclosed.
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- ID:
- ivo://CDS.VizieR/J/PAZh/42/46
- Title:
- Pulkovo visual double stars photographic obs.
- Short Name:
- J/PAZh/42/46
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the results of determining the relative positions of the 359 pairs of stars. More then six thousands of plates had been obtained in 1960-2007 years using the 26-inch Zeiss refractor(D=650mm, F=10413mm, scale is 19.80-arcsec/mm) at Pulkovo (code is 084). The plate digitization was carried out using a digital camera Canon EOS 5D Mark II and the lens 21M Jupiter, the scale was 21um/pixel. The measurements were calibrated using a template which was digitized by means of the Belgian high-precision scanner ROB Digitizer. Results were thoroughly examined for the systematic errors.
- ID:
- ivo://CDS.VizieR/J/A+A/554/A28
- Title:
- Qatar-1 differential light curve
- Short Name:
- J/A+A/554/A28
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A long-term multi-purpose observational programme has started with HARPS-N@TNG aimed to characterise the global architectural properties of exoplanetary systems. In this first paper we fully characterise the transiting system Qatar-1. We exploit HARPS-N high-precision radial velocity measurements obtained during a transit to measure the Rossiter-McLaughlin effect in the Qatar-1 system, and out-of-transit measurements to redetermine the spectroscopic orbit. New photometric transit light-curves are analysed and a spectroscopic characterisation of the host star atmospheric parameters is performed based on various methods (line equivalent widths ratios, spectral synthesis, spectral energy distribution). We achieved a significant improvement in the accuracy of the orbital parameters and derived the spin-orbit alignment of the system; this information, combined with the spectroscopic determination of the host star properties, allows us to derive the fundamental physical parameters for star and planet (masses and radii). The orbital solution for the Qatar-1 system is consistent with a circular orbit and the system presents a sky-projected obliquity of lambda=-8.4+/-7.1{deg}. The planet, with a mass of 1.33+/-0.05M_J_, is found to be significantly more massive than previously reported. The host star is confirmed to be metal-rich ([Fe/H]=0.20+/-0.10) and slowly rotating (vsini=1.7+/-0.3km/s), though moderately active, as indicated by strong chromospheric emission in the Ca II H&K line cores (logR'_HK_ about -4.60). The system is well aligned and fits well within the general lambda vs Teff trend. We definitely rule out any significant orbital eccentricity. The evolutionary status of the system is inferred based on gyrochronology, and the present orbital configuration and timescale for orbital decay are discussed in terms of star-planet tidal interactions.
- ID:
- ivo://CDS.VizieR/J/PASP/124/1279
- Title:
- Q3 Kepler's combined photometry
- Short Name:
- J/PASP/124/1279
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Kepler Mission is searching for Earth-size planets orbiting solar-like stars by simultaneously observing >160000 stars to detect sequences of transit events in the photometric light curves. The Combined Differential Photometric Precision (CDPP) is the metric that defines the ease with which these weak terrestrial transit signatures can be detected. An understanding of CDPP is invaluable for evaluating the completeness of the Kepler survey and inferring the underlying planet population. This paper describes how the Kepler CDPP is calculated, and introduces tables of rms CDPP on a per-target basis for 3-, 6-, and 12-hr transit durations, which are now available for all Kepler observations. Quarter 3 is the first typical set of observations at the nominal length and completeness for a quarter, from 2009 September 18 to 2009 December 16, and we examine the properties of the rms CDPP distribution for this data set. Finally, we describe how to employ CDPP to calculate target completeness, an important use case.
- ID:
- ivo://CDS.VizieR/J/ApJ/768/155
- Title:
- Radial velocities and photometry of HD 38529 system
- Short Name:
- J/ApJ/768/155
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The transit signature of exoplanets provides an avenue through which characterization of exoplanetary properties may be undertaken, such as studies of mean density, structure, and atmospheric composition. The Transit Ephemeris Refinement and Monitoring Survey is a program to expand the catalog of transiting planets around bright host stars by refining the orbits of known planets discovered with the radial velocity technique. Here we present results for the HD 38529 system. We determine fundamental properties of the host star through direct interferometric measurements of the radius and through spectroscopic analysis. We provide new radial velocity measurements that are used to improve the Keplerian solution for the two known planets, and we find no evidence for a previously postulated third planet. We also present 12 years of precision robotic photometry of HD 38529 that demonstrate the inner planet does not transit and the host star exhibits cyclic variations in seasonal mean brightness with a timescale of approximately six years.
- ID:
- ivo://CDS.VizieR/J/AJ/154/188
- Title:
- Radial velocities and photometry of K2-114&K2-115
- Short Name:
- J/AJ/154/188
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the first results from a search for transiting warm Jupiter exoplanets-gas giant planets receiving stellar irradiation below about 10^8^ erg/s/cm^2^, equivalent to orbital periods beyond about 10 days around Sun-like stars. We have discovered two transiting warm Jupiter exoplanets initially identified as transiting candidates in K2 photometry. K2-114b has a mass of 1.85_-0.22_^+0.23^ M_J_, a radius of 0.942_-0.020_^+0.032^ R_J_, and an orbital period of 11.4 days. K2-115b has a mass of 0.84_-0.20_^+0.18^ M_J_, a radius of 1.115_-0.061_^+0.057^ R_J_, and an orbital period of 20.3 days. Both planets are among the longest-period transiting gas giant planets with a measured mass, and they are orbiting relatively old host stars. Both planets are not inflated, as their radii are consistent with theoretical expectations. Their position in the planet radius-stellar irradiation diagram is consistent with the scenario where the radius-irradiation correlation levels off below about 10^8^ erg/s/cm^2^, suggesting that for warm Jupiters stellar irradiation does not play a significant role in determining the planet radius. We also report our identification of another K2 transiting warm Jupiter candidate, EPIC 212504617, as a false positive.
- ID:
- ivo://CDS.VizieR/J/ApJ/757/18
- Title:
- Radial velocities for 16 hot Jupiter host stars
- Short Name:
- J/ApJ/757/18
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We provide evidence that the obliquities of stars with close-in giant planets were initially nearly random, and that the low obliquities that are often observed are a consequence of star-planet tidal interactions. The evidence is based on 14 new measurements of the Rossiter-McLaughlin effect (for the systems HAT-P-6, HAT-P-7, HAT-P-16, HAT-P-24, HAT-P-32, HAT-P-34, WASP-12, WASP-16, WASP-18, WASP-19, WASP-26, WASP-31, Gl 436, and Kepler-8), as well as a critical review of previous observations. The low-obliquity (well-aligned) systems are those for which the expected tidal timescale is short, and likewise the high-obliquity (misaligned and retrograde) systems are those for which the expected timescale is long. At face value, this finding indicates that the origin of hot Jupiters involves dynamical interactions like planet-planet interactions or the Kozai effect that tilt their orbits rather than inspiraling due to interaction with a protoplanetary disk. We discuss the status of this hypothesis and the observations that are needed for a more definitive conclusion.
- ID:
- ivo://CDS.VizieR/J/AJ/131/1702
- Title:
- Radial velocities for the HD 27638B components
- Short Name:
- J/AJ/131/1702
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report spectroscopic observations of HD 27638B, the secondary in a visual binary in which the physically associated primary (separation ~19") is a B9 V star. The secondary shows strong Li{lambda}6708 absorption, suggesting youth, and has attracted attention in the past as a candidate post-T Tauri star, although this has subsequently been ruled out. It was previously known to be a double-lined spectroscopic binary (F8+G6) with a period of 17.6days and to show velocity residuals indicating a more distant massive third companion with a period of at least 8yr.
- ID:
- ivo://CDS.VizieR/J/AJ/154/181
- Title:
- Radial velocities for the star HD 34445
- Short Name:
- J/AJ/154/181
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a new precision radial velocity (RV) data set that reveals a multi-planet system orbiting the G0V star HD 34445. Our 18-year span consists of 333 precision RV observations, 56 of which were previously published and 277 of which are new data from the Keck Observatory, Magellan at Las Campanas Observatory, and the Automated Planet Finder at Lick Observatory. These data indicate the presence of six planet candidates in Keplerian motion about the host star with periods of 1057, 215, 118, 49, 677, and 5700 days, and minimum masses of 0.63, 0.17, 0.1, 0.05, 0.12, and 0.38 MJ, respectively. The HD 34445 planetary system, with its high degree of multiplicity, its long orbital periods, and its induced stellar RV half-amplitudes in the range 2 m/s~<K~<5 m/s is fundamentally unlike either our own solar system (in which only Jupiter and Saturn induce significant reflex velocities for the Sun), or the Kepler multiple-transiting systems (which tend to have much more compact orbital configurations).
- ID:
- ivo://CDS.VizieR/J/ApJ/708/1366
- Title:
- Radial velocities for 61 Vir
- Short Name:
- J/ApJ/708/1366
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present precision radial velocity data that reveal a multiple exoplanet system orbiting the bright nearby G5V star 61 Virginis. Our 4.6 years of combined Keck/HIRES and Anglo-Australian Telescope precision radial velocities indicate the hitherto unknown presence of at least three planets orbiting this well-studied star. These planets are all on low-eccentricity orbits with periods of 4.2, 38.0, and 124.0 days, and projected masses (Msini) of 5.1, 18.2, and 24.0M_{earth}_, respectively. Test integrations of systems consistent with the radial velocity data suggest that the configuration is dynamically stable.
