Parallax ≈ Parallax
View article
<i>Gaia</i> Data Release 2 Open
Context. Gaia Data Release 2 ( Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 22 months of its operational pha…
View article
<i>Gaia</i>Early Data Release 3 Open
Context. Gaia Early Data Release 3 ( Gaia EDR3) contains results for 1.812 billion sources in the magnitude range G = 3–21 based on observations collected by the European Space Agency Gaia satellite during the first 34 months of its operat…
View article
Gaia Data Release 1 Open
Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7. Aims. A summary of Gaia DR1 is presente…
View article
Gaia Data Release 2: The astrometric solution Open
Gaia Data Release 2 (Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 22 months of its operational phase. We des…
View article
New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant Open
We present new measurements of the parallax of seven long-period (≥10 days) Milky Way (MW) Cepheid variables (SS CMa, XY Car, VY Car, VX Per, WZ Sgr, X Pup, and S Vul) using one-dimensional astrometric measurements from spatial scanning of…
View article
Estimating Distances from Parallaxes Open
Astrometric surveys such as Gaia and LSST will measure parallaxes for hundreds of millions of stars. Yet they will not measure a single distance. Rather, a distance must be estimated from a parallax. In this didactic article, I show that d…
View article
Painting a portrait of the Galactic disc with its stellar clusters Open
Context. The large astrometric and photometric survey performed by the Gaia mission allows for a panoptic view of the Galactic disc and its stellar cluster population. Hundreds of stellar clusters were only discovered after the latest Gaia…
View article
Gaia EDR3 view on galactic globular clusters Open
We use the data from Gaia Early Data Release 3 (EDR3) to study the kinematic properties of Milky Way globular clusters. We measure the mean parallaxes and proper motions (PM) for 170 clusters, determine the PM dispersion profiles for more …
View article
A million binaries from <i>Gaia</i> eDR3: sample selection and validation of <i>Gaia</i> parallax uncertainties Open
We construct from Gaia eDR3 an extensive catalogue of spatially resolved binary stars within ≈1 kpc of the Sun, with projected separations ranging from a few au to 1 pc. We estimate the probability that each pair is a chance alignment empi…
View article
<i>Gaia</i>Early Data Release 3 Open
Context. The third Gaia data release is published in two stages. The early part, Gaia EDR3, gives very precise astrometric and photometric properties for nearly two billion sources together with seven million radial velocities from Gaia DR…
View article
Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array Open
We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier results by using longer data sets and modelling the non-stati…
View article
The APOGEE-2 Survey of the Orion Star-forming Complex. II. Six-dimensional Structure Open
We present an analysis of spectroscopic and astrometric data from APOGEE-2 and Gaia DR2 to identify structures toward the Orion Complex. By applying a hierarchical clustering algorithm to the six-dimensional stellar data, we identify spati…
View article
A catalogue of white dwarfs in <i>Gaia</i> EDR3 Open
We present a catalogue of white dwarf candidates selected from Gaia Early Data Release 3 (EDR3). We applied several selection criteria in absolute magnitude, colour, and Gaia quality flags to remove objects with unreliable measurements whi…
View article
A COORDINATED X-RAY AND OPTICAL CAMPAIGN OF THE NEAREST MASSIVE ECLIPSING BINARY,<i>δ</i>ORIONIS Aa. IV. A MULTIWAVELENGTH, NON-LTE SPECTROSCOPIC ANALYSIS Open
Eclipsing systems of massive stars allow one to explore the properties of\ntheir components in great detail. We perform a multi-wavelength, non-LTE\nanalysis of the three components of the massive multiple system $\\delta$ Ori A,\nfocusing…
View article
Recognition and Depth Estimation of Ships Based on Binocular Stereo Vision Open
To improve the navigation safety of inland river ships and enrich the methods of environmental perception, this paper studies the recognition and depth estimation of inland river ships based on binocular stereo vision (BSV). In the stage o…
View article
A PARALLAX-BASED DISTANCE ESTIMATOR FOR SPIRAL ARM SOURCES Open
The spiral arms of the Milky Way are being accurately located for the first time via trigonometric parallaxes of massive star-forming regions with the Bar and Spiral Structure Legacy Survey, using the Very Long Baseline Array and the Europ…
View article
Improvement of the Fmask algorithm for Sentinel-2 images: Separating clouds from bright surfaces based on parallax effects Open
Reliable identification of clouds is necessary for any type of optical remote sensing image analysis, especially in operational and fully automatic setups. One of the most elaborated and widespread algorithms, namely Fmask, was initially d…
View article
A Catalog of Newly Identified Star Clusters in Gaia DR2 Open
We present the Star cluster Hunting Pipeline (SHiP) that can identify star clusters in Gaia second data release (DR2) data and establish a star cluster catalog for the Galactic disk. A friend-of-friend-based cluster finder method is used t…
View article
<i>Gaia</i> Early Data Release 3 Open
ERRATUMThis article is an erratum for:[https://doi.org/10.1051/0004-6361/202039657]
View article
StarHorse: a Bayesian tool for determining stellar masses, ages, distances, and extinctions for field stars Open
Understanding the formation and evolution of our Galaxy requires accurate\ndistances, ages and chemistry for large populations of field stars. Here we\npresent several updates to our spectro-photometric distance code, that can now\nalso be…
View article
The observed velocity distribution of young pulsars Open
\n Contains fulltext :\n 180940.pdf (Publisher’s version ) (Open Access)\n
View article
<i>Gaia</i>Data Release 3 Open
Context. The astrophysical characterisation of sources is among the major new data products in the third Gaia Data Release (DR3). In particular, there are stellar parameters for 471 million sources estimated from low-resolution BP/RP spect…
View article
THE GOULD’S BELT DISTANCES SURVEY (GOBELINS). I. TRIGONOMETRIC PARALLAX DISTANCES AND DEPTH OF THE OPHIUCHUS COMPLEX Open
We present the first results of the Gould’s Belt Distances Survey (GOBELINS), a project aimed at measuring the proper motion and trigonometric parallax of a large sample of young stars in nearby regions using multi-epoch Very Long Baseline…
View article
Simultaneous calibration of spectro-photometric distances and the Gaia DR2 parallax zero-point offset with deep learning Open
Gaia measures the five astrometric parameters for stars in the Milky Way, but only four of them (positions and proper motion, but not distance) are well measured beyond a few kpc from the Sun. Modern spectroscopic surveys such as APOGEE co…
View article
Fully computed holographic stereogram based algorithm for computer-generated holograms with accurate depth cues Open
We propose an algorithm based on fully computed holographic stereogram for calculating full-parallax computer-generated holograms (CGHs) with accurate depth cues. The proposed method integrates point source algorithm and holographic stereo…
View article
Distances and parallax bias in Gaia DR2 Open
We derive Bayesian distances for all stars in the radial velocity sample of Gaia DR2, and use the statistical method of Schönrich, Binney & Asplund to validate the distances and test the Gaia parallaxes. In contrast to other methods, which…
View article
ESTIMATING DISTANCES FROM PARALLAXES. II. PERFORMANCE OF BAYESIAN DISTANCE ESTIMATORS ON A GAIA-LIKE CATALOGUE Open
Estimating a distance by inverting a parallax is only valid in the absence of noise. As most stars in the Gaia catalog will have non-negligible fractional parallax errors, we must treat distance estimation as a constrained inference proble…
View article
Large-scale filaments associated with Milky Way spiral arms Open
The ubiquity of filamentary structure at various scales throughout the Galaxy has triggered a renewed interest in their formation, evolution, and role in star formation. The largest filaments can reach up to Galactic scale as part of the s…
View article
VIRAC: the VVV Infrared Astrometric Catalogue Open
© 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licens…
View article
<i>SPITZER</i>AS A MICROLENS PARALLAX SATELLITE: MASS MEASUREMENT FOR THE OGLE-2014-BLG-0124L PLANET AND ITS HOST STAR Open
We combine Spitzer and ground-based observations to measure the microlens parallax vector π_E, and thus the mass and distance of OGLE-2014-BLG-0124L, making it the first microlensing planetary system with a space-based parallax measurement…