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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad Nacional Autónoma de México
2022
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=57175502012 https://www.redalyc.org/journal/571/57175502012/ https://www.redalyc.org/journal/571/57175502012/html/ https://www.redalyc.org/journal/571/57175502012/57175502012.epub https://www.redalyc.org/journal/571/57175502012/movil |
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Sommario:
- The Hipparcos Pleiades Parallax Error is Also a Proper Motion Error Valeri V. Makarov Física, Astronomía y Matemáticas Astrometry parallaxes proper motions reference systems The mean parallax of the Pleiades open cluster from the Hipparcos catalog is larger than the true value by approximately 1 mas. The origin of this error, as well as a possible algorithm of correcting it, was proposed by Makarov (2002). The problem is reassessed using the more accurate Gaia data with a focus on the predicted correction to the Pleiades proper motions. The accurately determined differences Gaia Hipparcos for 52 common stars are close to these estimates within the formal uncertainties for all three parameters, which strongly suggests that the proposed interpretation was correct. With adjustments for the systematic vector field fitted with 126 vector spherical harmonics to degree 7, these differences amount to (+0.39, -0.74) mas yr−1. The implications of small-scale proper motion and position errors in Hipparcos for present day astrometry are briefly discussed. 2022 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57175502012 https://www.redalyc.org/journal/571/57175502012/ https://www.redalyc.org/journal/571/57175502012/html/ https://www.redalyc.org/journal/571/57175502012/57175502012.epub https://www.redalyc.org/journal/571/57175502012/movil 10.22201/ia.01851101p.2022.58.02.12 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.58