Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (37) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (1)
· Reads History
· Translate This Page
Determination of the visual orbit of the spectroscopic binary Alpha Andromedae with submilliarcsecond precision
Pan, Xiaopei; Shao, Michael; Colavita, M. M.; Armstrong, J. T.; Mozurkewich, David; Vivekanand, Maddali; Denison, Craig S.; Simon, Richard S.; Johnston, Kenneth J.
AA(California Institute of Technology, Pasadena), AB(JPL, Pasadena, CA), AC(JPL, Pasadena, CA), AD(U.S. Naval Observatory, Washington, DC), AE(U.S. Naval Observatory, Washington, DC), AF(U.S. Naval Observatory, Washington, DC), AG(U.S. Naval Observatory, Washington, DC), AH(U.S. Naval Observatory, Washington, DC), AI(U.S. Naval Observatory, Washington, DC)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 384, Jan. 10, 1992, p. 624-633. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Astronomical Spectroscopy, Binary Stars, Orbital Elements, Stellar Motions, Stellar Orbits, Angular Resolution, Orbit Calculation, Stellar Magnitude, Visual Observation
Bibliographic Code:


The visual orbit of the spectroscopic binary Alpha And is determined independently of spectroscopic data using the Mark III Stellar Interferometer. Observations of Alpha And in 1988 and 1989 clearly demonstrate submilliarcsecond measurement precision at optical wavelengths. All of the orbital elements of Alpha And are calculated utilizing observations from the stellar interferometer only and are in excellent agreement with the spectroscopic results. However, three of these elements can only be obtained from interferometric data. Using both interferometric and spectroscopic observations, the definitive orbital elements are determined including angular semimajor axis, inclination, position angle of ascending node, longitude of periastron, period eccentricity, and epoch of periastron passage. In addition, the magnitude difference between the two components is measured, yielding delta-m = 1.82 +/- 0.04 mag at 800 nm and delta-m = 1.99 +/- 0.04 mag at 550 nm. Incorporating photometric observations, the color indices between 550 nm and 800 nm for the primary and the companion are determined as -0.11 +/- 0.03 mag +0.07 +/- 0.05 mag, respectively.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

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


Find Similar Abstracts:

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