C. L. Morbey
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View article: A Low‐Resolution Multislit Spectrograph for 20–30 Meter Telescopes
A Low‐Resolution Multislit Spectrograph for 20–30 Meter Telescopes Open
A design is proposed for a slit mask spectrograph for wide‐field 20 and 30 m telescopes that overcomes the problem of the very large physical size of their focal surfaces. The design divides the focal surface into many spectrograph cells w…
View article: Overview of the [ITAL]Far Ultraviolet Spectroscopic Explorer[/ITAL] Mission
Overview of the [ITAL]Far Ultraviolet Spectroscopic Explorer[/ITAL] Mission Open
International audience
View article: Surveys for Z>1 Field Galaxies; David Crampton
Surveys for Z>1 Field Galaxies; David Crampton Open
In the course of the comprehensive CFRS redshift survey to I = 22.5 with the CFHT MOS/SIS spectrograph, we have observed ~25 field galaxies with z > 1. However, it is clear that almost an equal number, predominantly red galaxies, have like…
View article: Interferometric Imaging of Nearby Low–Mass Spectroscopic Binaries. I. KPNO Observations
Interferometric Imaging of Nearby Low–Mass Spectroscopic Binaries. I. KPNO Observations Open
We present a preliminary report on radial–velocity and infrared interferometric observations, with emphasis on the newly resolved nearby sources Gl 609.2 and Gl 804. We briefly discuss their low–mass companions, their luminosities, and the…
View article: The Combination of Spectroscopic and Astrometric Data in the Analysis of Orbital Motions in Binary Star Systems
The Combination of Spectroscopic and Astrometric Data in the Analysis of Orbital Motions in Binary Star Systems Open
Even though various types of data for binary stars are being obtained in unprecedented quantities there is still a lack of completeness. Because the reduction of combinations of these data adds to the fundamental concepts in astronomy it i…
View article: Interferometric Imaging of Nearby Low–Mass Spectroscopic Binaries. II. ESO Observations
Interferometric Imaging of Nearby Low–Mass Spectroscopic Binaries. II. ESO Observations Open
We present a preliminary report on infrared interferometric observations, with emphasis on the resolved nearby sources Gl 563.4, Gl 570B and Gl 773.3. We briefly discuss their individual masses inferred from the combination of spectroscopi…
View article: <title>Liquid mirrors: a progress report</title>
Liquid mirrors: a progress report Open
Since liquid mirrors are potentially useful in science (e.g., astronomy, atmospheric sciences, and optical testing), work \nhas been undertaken to determine whether they are technologically feasible. A testing tower has been equipped with …
View article: Long-period radial-velocity variations of Arcturus
Long-period radial-velocity variations of Arcturus Open
Precise measurements of the radial velocity of Arcturus were obtained on 43 occasions between 1981 and 1985. The measurements show a 500 m/s range, confirming the radial velocity variability of Arcturus. Multiperiod models which give a goo…
View article: Long-Period Radial-Velocity Variations of Arcturus
Long-Period Radial-Velocity Variations of Arcturus Open
We have measured the relative radial velocity of Arcturus using the HF absorption cell technique on 43 occasions from 1981 through 1985. The range of our velocities is 500 m s -1 , which is much larger than our estimated internal errors (t…
View article: NGC 3557 and its globular clusters
NGC 3557 and its globular clusters Open
Recently obtained CCD photographs of the giant elliptical galaxy NGC 3557 were examined in order to determine its luminosity structure and to discern whether the galaxy possesses a globular cluster system. A 50-minute frame was obtained fr…
View article: Luminosities of first-ranked galaxies
Luminosities of first-ranked galaxies Open
A number of first-ranked galaxies in poor and rich clusters have absolute magnitudes which correlate well with the richness classes of their parent clusters. The correlation is consistent with the statistical theory for the luminosities of…
View article: Refractive vs Reflective Correctors
Refractive vs Reflective Correctors Open
Summary Improved designs of refractive correctors produce excellent images with fast telescopes such as those with an F/1.5 prime focus and F/3.5 secondary focus. The fields are flat and there is compensation for the chromatic effect cause…
View article: The orbital elements of 19 Leo Minoris
The orbital elements of 19 Leo Minoris Open
Radial velocity measurements and spectroscopic orbital elements are presented for 19 Leo Minoris (HD 86146), a single-spectrum binary for which a clearly visible secondary spectrum has been observed. Evidence indicates that the system cons…
View article: The triple system HD 165590
The triple system HD 165590 Open
High-dispersion spectrograms of the triple system HD 165590 are examined which were obtained during the periastron passage of 1978. The orbital elements are determined by combining the spectroscopic observations with visual observations of…
View article: The double-lined spectroscopic binary HD 214686
The double-lined spectroscopic binary HD 214686 Open
Orbital elements for the 6th-magnitude 21.7-day double-lined binary HD 214686 are determined from coude spectrograms. Photometric observations show the system to contain two F7 V stars, and minimum masses near 1.16 solar masses are found f…
View article: HD 165590 a spectroscopic visual triple system.
HD 165590 a spectroscopic visual triple system. Open
IID 165590 is known to be a visual binary with a period of 20 years and extremely high orbital eccentricity. New instrumental and computer techniques are used to show that one member of the visual pair is a spectroscopic binary with a peri…
View article: A Synthesis of the Solutions of Spectroscopic and Visual Binary Orbits
A Synthesis of the Solutions of Spectroscopic and Visual Binary Orbits Open
A method which simultaneously yields a complete set of orbital elements from spectroscopic and visual binary observations is described. The technique is applied to Burnham 1163. Key word: spectroscopic binaries - visual binaries - orbital …
View article: A Search for Spectroscopic Binaries from Published Radial Velocity Data
A Search for Spectroscopic Binaries from Published Radial Velocity Data Open
The published radial velocities for a sample of ten suspected spectroscopic binaries were analyzed by means of a computerized peried-finding method capable of examining more than 150,000 periods hou on modem fast computers. The investigati…
View article: Occultation Studies at the Dominion Astrophysical Observatory
Occultation Studies at the Dominion Astrophysical Observatory Open
During the last year studies of lunar occupations have begun at the Dominion Astrophysical Observatory. Since the acquisition of a Fabri-Tek (model FT 1074) signal averager and analyser, twelve occultations have been observed but only one …