Search Publications

Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog

Bakos, Gáspár Á.; Sahu, Kailash C.; Németh, Péter

We present refined coordinates and proper-motion data for the high proper-motion (HPM) stars in the Luyten Half-Second (LHS) catalog. The positional uncertainty in the original Luyten catalog is typically greater than 10" and is often greater than 30". We have used the digital scans of the POSS I and POSS II plates to derive more accurate position…

Spectral Classification of the Hot Components of a Large Sample of Stars with Composite Spectra, and Implication for the Absolute Magnitudes of the Cool Supergiant Components.

Ginestet, N.; Carquillat, J. M.

A sample of 135 stars with composite spectra has been observed in the near-UV spectral region with the Aurélie spectrograph at the Observatoire de Haute-Provence. Using the spectral classifications of the cool components previously determined with near infrared spectra, we obtained reliable spectral types of the hot components of the sample system…

Speckle Observations of Composite Spectrum Stars with PISCO in 1993-1998

Festou, M. C.; Arnold, L.; Scardia, M. +8 more

We present speckle interferometry observations of 47 composite spectrum stars obtained between 1993 and 1998 at the Pic du Midi Observatory with the PISCO speckle camera. 76% of over 150 independent 10 minute sequences of observations led to a companion detection. Binary component angular separations ranged from 0.05" to 1.2". We also obtained a s…