Matches in SemOpenAlex for { <https://semopenalex.org/work/W4297225504> ?p ?o ?g. }
Showing items 1 to 86 of
86
with 100 items per page.
- W4297225504 endingPage "157" @default.
- W4297225504 startingPage "157" @default.
- W4297225504 abstract "Abstract The Hipparcos catalog provides the first epoch of the celestial reference frame (CRF) in the optical domain and serves as an indispensable tool to verify and improve the Gaia CRF for the brighter stars ( V < 11 mag) and to identify the elusive astrometric binary stars with dim or invisible companions, including long-period exoplanets. The systems of positions in Hipparcos and Gaia cannot be directly compared, because they refer to two different mean epochs. It is shown that the proper motion systems for carefully filtered common stars are not statistically consistent within the given formal errors. The vector field of proper motion differences is fitted with 126 vector spherical harmonics up to degree 7 revealing a global pattern at high signal-to-noise ratios, including the three terms of rigid rotation. The origin of the differential spin and other large harmonic terms is investigated by producing a similar decomposition of the Gaia−HG proper motion field, where HG stands for the long-term proper motions derived from the Hipparcos and Gaia DR3 positions, for the same sample of stars. Hipparcos proper motions emerge as the largest source of sky-correlated distortions of the multiepoch optical CRF with a median value of ∼190 μ as yr −1 and a global spin of ∼226 μ as yr −1 , while the Hipparcos positions and Gaia EDR3 proper motions are explicitly consistent by construction at a level of ∼10 μ as yr −1 . The latter, however, include multiple distortions of higher degree, which should be taken into account in astrometric applications using the HG field." @default.
- W4297225504 created "2022-09-28" @default.
- W4297225504 creator A5053155528 @default.
- W4297225504 date "2022-09-26" @default.
- W4297225504 modified "2023-09-26" @default.
- W4297225504 title "Differential Proper Motion Spin of the Hipparcos and Gaia Celestial Reference Frames" @default.
- W4297225504 cites W147232447 @default.
- W4297225504 cites W1986752302 @default.
- W4297225504 cites W2004510296 @default.
- W4297225504 cites W2032923636 @default.
- W4297225504 cites W2091568164 @default.
- W4297225504 cites W2094314551 @default.
- W4297225504 cites W2097993930 @default.
- W4297225504 cites W2114272110 @default.
- W4297225504 cites W2160892772 @default.
- W4297225504 cites W3105078541 @default.
- W4297225504 cites W3110680196 @default.
- W4297225504 cites W3118884154 @default.
- W4297225504 cites W3147779996 @default.
- W4297225504 cites W3159030167 @default.
- W4297225504 cites W3187067873 @default.
- W4297225504 cites W3211344180 @default.
- W4297225504 cites W4213259675 @default.
- W4297225504 cites W4214947719 @default.
- W4297225504 cites W4283813844 @default.
- W4297225504 doi "https://doi.org/10.3847/1538-3881/ac88d1" @default.
- W4297225504 hasPublicationYear "2022" @default.
- W4297225504 type Work @default.
- W4297225504 citedByCount "2" @default.
- W4297225504 countsByYear W42972255042023 @default.
- W4297225504 crossrefType "journal-article" @default.
- W4297225504 hasAuthorship W4297225504A5053155528 @default.
- W4297225504 hasBestOaLocation W42972255041 @default.
- W4297225504 hasConcept C104114177 @default.
- W4297225504 hasConcept C121332964 @default.
- W4297225504 hasConcept C126042441 @default.
- W4297225504 hasConcept C1276947 @default.
- W4297225504 hasConcept C133725777 @default.
- W4297225504 hasConcept C150846664 @default.
- W4297225504 hasConcept C154945302 @default.
- W4297225504 hasConcept C155008239 @default.
- W4297225504 hasConcept C172849965 @default.
- W4297225504 hasConcept C176673079 @default.
- W4297225504 hasConcept C41008148 @default.
- W4297225504 hasConcept C44870925 @default.
- W4297225504 hasConcept C73329638 @default.
- W4297225504 hasConcept C74050887 @default.
- W4297225504 hasConcept C74650414 @default.
- W4297225504 hasConcept C76155785 @default.
- W4297225504 hasConceptScore W4297225504C104114177 @default.
- W4297225504 hasConceptScore W4297225504C121332964 @default.
- W4297225504 hasConceptScore W4297225504C126042441 @default.
- W4297225504 hasConceptScore W4297225504C1276947 @default.
- W4297225504 hasConceptScore W4297225504C133725777 @default.
- W4297225504 hasConceptScore W4297225504C150846664 @default.
- W4297225504 hasConceptScore W4297225504C154945302 @default.
- W4297225504 hasConceptScore W4297225504C155008239 @default.
- W4297225504 hasConceptScore W4297225504C172849965 @default.
- W4297225504 hasConceptScore W4297225504C176673079 @default.
- W4297225504 hasConceptScore W4297225504C41008148 @default.
- W4297225504 hasConceptScore W4297225504C44870925 @default.
- W4297225504 hasConceptScore W4297225504C73329638 @default.
- W4297225504 hasConceptScore W4297225504C74050887 @default.
- W4297225504 hasConceptScore W4297225504C74650414 @default.
- W4297225504 hasConceptScore W4297225504C76155785 @default.
- W4297225504 hasIssue "4" @default.
- W4297225504 hasLocation W42972255041 @default.
- W4297225504 hasLocation W42972255042 @default.
- W4297225504 hasOpenAccess W4297225504 @default.
- W4297225504 hasPrimaryLocation W42972255041 @default.
- W4297225504 hasRelatedWork W1635952503 @default.
- W4297225504 hasRelatedWork W1700911152 @default.
- W4297225504 hasRelatedWork W2059649202 @default.
- W4297225504 hasRelatedWork W2084269448 @default.
- W4297225504 hasRelatedWork W2134019957 @default.
- W4297225504 hasRelatedWork W2153327628 @default.
- W4297225504 hasRelatedWork W2520783903 @default.
- W4297225504 hasRelatedWork W2606095506 @default.
- W4297225504 hasRelatedWork W3105880325 @default.
- W4297225504 hasRelatedWork W4235744287 @default.
- W4297225504 hasVolume "164" @default.
- W4297225504 isParatext "false" @default.
- W4297225504 isRetracted "false" @default.
- W4297225504 workType "article" @default.