THE THIRD US NAVAL OBSERVATORY CCD ASTROGRAPH CATALOG (UCAC3)
- N. Zacharias, C. Finch, A. Young
- Physics
- 1 May 2004
The third US Naval Observatory (USNO) CCD Astrograph Catalog, UCAC3, was released at the IAU General Assembly on 2009 August 10. It is the first all-sky release in this series and contains just over…
(Erratum) Letter to the Editor - The Tycho-2 catalogue of the 2.5 million brightest stars
- E. Høg, C. Fabricius, A. Wicenec
- Physics
- 1 November 2000
Abstract : The Tycho-2 Catalogue presented here is an astrometric reference catalogue containing positions and proper motions as well as two-colour photometric data for the 2.5 million brightest…
The Tycho Double Star Catalogue
- C. Fabricius, E. Høg, V. Makarov, B. Mason, G. Wycoff, S. Urban
- Physics
- 1 March 2002
We report the discovery of 13 251 visual double stars, mostly with separations between 0.3 and 1 arcsec, from a dedicated re-reduction of the Tycho data from the star mapper of the ESA Hipparcos…
Precision Kinematics and Related Parameters of the α Persei Open Cluster
- V. Makarov
- Physics
- 1 June 2006
A kinematical study of the nearby open cluster α Persei is presented based on the astrometric proper motions and positions in the Tycho-2 catalog and Second USNO CCD Astrographic Catalog (UCAC2).…
The 100 Brightest X-Ray Stars within 50 Parsecs of the Sun
- V. Makarov
- Physics
- 1 October 2003
Based on the Hipparcos and Tycho-2 astrometric catalogs and the ROSAT surveys, a sample of 100 stars most luminous in X-rays within or around a distance of 50 pc is culled. The smallest X-ray…
Internal kinematics of the TW Hya association of young stars
- V. Makarov, C. Fabricius
- Physics, Geology
- 1 March 2001
Thirty one probable kinematic members of the nearby TW Hya association of young stars are selected from the RASSBSC/Tycho-2 sample of stars luminous in X-rays, detected by ROSAT. Eight of them have…
Computing the Parallax of the Pleiades from the Hipparcos Intermediate Astrometry Data: An Alternative Approach
- V. Makarov
- Physics
- 1 December 2002
The inconsistency between the mean parallax of the Pleidaes open cluster from the Hipparcos catalog and that obtained from the stellar evolution theory and photometric measurements is probed by…
Unraveling the Origins of Nearby Young Stars
- V. Makarov
- Physics
- 1 March 2007
A systematic search for close conjunctions and clusterings in the past of nearby stars younger than the Pleiades is undertaken, which may reveal the time, location, and mechanism of formation of…
The Lupus Association of Pre-Main-Sequence Stars: Clues to Star Formation Scattered in Space and Time
- V. Makarov
- Physics
- 20 March 2007
Kinematical analysis of spectroscopically identified pre-main-sequence stars associated with the Lupus dark cloud reveals a streamlike motion of low internal velocity dispersion (≤1.3 km s-1). A…
Taking the Measure of the Universe: Precision Astrometry with SIM PlanetQuest
- S. Unwin, M. Shao, G. Worthey
- Physics, Geology
- 9 October 2006
Precision astrometry at microarcsecond accuracy has applications for a wide range of astrophysical problems. This paper is a study of the science questions that can be addressed using an instrument…
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