Styjun

SAO/NASA ADS Astronomy Abstract Service

---

· Find Similar Abstracts (with default settings below)

· Electronic Refereed Journal Article (HTML)

· Full Refereed Journal Article (PDF/Postscript)

· arXiv e-print (arXiv:0708.1752)

· On-line Data

· References in the article

· Citations to the Article (2497) (Citation History)

· Refereed Citations to the Article

· SIMBAD Objects (14)

· Associated Articles

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		Validation of the new Hipparcos reduction
Authors:		van Leeuwen, F.
Affiliation:		AA(Institute of Astronomy, Madingley Road, Cambridge, UK)
Publication:		Astronomy and Astrophysics, Volume 474, Issue 2, November I 2007, pp.653-664 (A&A Homepage)
Publication Date:		11/2007
Origin:		EDP Sciences
Astronomy Keywords:		space vehicles: instruments, methods: data analysis, catalogs, astrometry, instrumentation: miscellaneous
DOI:		10.1051/0004-6361:20078357
Bibliographic Code:		2007A&A...474..653V

Abstract

Context: A new reduction of the astrometric data as produced by the
Hipparcos mission has been published, claiming accuracies for nearly all
stars brighter than magnitude Hp=8 to be better, by up to a factor 4,
than in the original catalogue.
Aims: The new Hipparcos
astrometric catalogue is checked for the quality of the data and the
consistency of the formal errors as well as the possible presence of
error correlations. The differences with the earlier publication are
explained.
Methods: The internal errors are followed through the
reduction process, and the external errors are investigated on the basis
of a comparison with radio observations of a small selection of stars,
and the distribution of negative parallaxes. Error correlation levels
are investigated and the reduction by more than a factor 10 as obtained
in the new catalogue is explained.
Results: The formal errors on
the parallaxes for the new catalogue are confirmed. The presence of a
small amount of additional noise, though unlikely, cannot be ruled out.

Conclusions: The new reduction of the Hipparcos astrometric data
provides an improvement by a factor 2.2 in the total weight compared to
the catalogue published in 1997, and provides much improved data for a
wide range of studies on stellar luminosities and local galactic
kinematics.

---

Associated Articles

Source Paper     Catalog Description     Catalog Description    

---

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

---

---

Find Similar Abstracts:

Use:		Authors
		Title
		Keywords (in text query field)
		Abstract Text
Return:		Query Results	Return    items starting with number
		Query Form
Database:		Astronomy
		Physics
		arXiv e-prints

    

---

(function(i,s,o,g,r,a,m)i['GoogleAnalyticsObject']=r;i[r]=i[r])(window,document,'script','//www.google-analytics.com/analytics.js','ga');

ga('create', 'UA-37369750-3', 'harvard.edu');
ga('send', 'pageview');