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MK Classification and Dynamical Masses for Late-Type Visual Binaries

Docobo, José A.; Tamazian, Vakhtang S.; Melikian, Norair D. +1 more

On the basis of slit spectra obtained with the SCORPIO spectral camera attached to the 2.6 m telescope of the V. Ambartsumian Byurakan Astrophysical Observatory (Armenia), MK classifications for 30 visual binaries comprising mostly late K and M type stars are presented. Comparison with other determinations shows that this configuration provides a …

The Concept of a Stare-Mode Astrometric Space Mission

Zacharias, N.; Dorland, B.

In this paper, we introduce the concept of a stare-mode astrometric space mission. The traditionally accepted mode of operation for a mapping astrometric space mission is that of a continuously scanning satellite, such as the successful Hipparcos and planned Gaia missions. With the advent of astrometry missions mapping out stars to 20th magnitude,…

Productivity and Impact of Space-based Astronomical Facilities

Trimble, Virginia; Zaich, Paul; Bosler, Tammy

In 2001, 18 journals published about 1270 astronomical papers that reported and/or analyzed data gathered by space-based observatories and missions. These papers were cited 24,460 times in papers published in 2002-2004, an average of 19.26 citations per paper or 6.42 citations per paper per year (sometimes called impact or impact factor). About 60…

Proper Motions of Faint Ultraviolet-bright Sources in the Sandage Two-Color Survey of the Galactic Plane

Lépine, Sébastien; Lanning, Howard H.

Proper motions with values >=10 or <=-10 mas yr^-1 have been extracted from the USNO-B1.0 and Tycho-2 catalogs for all Lanning UV-bright sources identified in the Sandage Two-Color Survey of the Galactic Plane and presented in Papers I-VI. Of the 572 sources examined, we find at least 213 that exhibit a significantly large proper m…