Spectral and Luminosity Classifications and Measurements of the Strength of Cyanogen Absorption for Late-Type Stars from Objective-Prism Spectra.

1961 ◽  
Vol 134 ◽  
pp. 809 ◽  
Author(s):  
Kenneth M. Yoss
Keyword(s):  
Late Type ◽  
Objective Prism

scholarly journals Objective Prism Spectral Classification at the Stockholm Observatory

1973 ◽  
Vol 50 ◽  
pp. 85-90 ◽  
Author(s):  
B. Nordström ◽  
A. Sundman
Keyword(s):  
Milky Way ◽  
Spectral Classification ◽  
Late Type ◽  
Objective Prism ◽  
Spectral Survey

As a result of the spectral survey at the Stockholm Observatory finding lists are prepared for early and late type stars in the Southern Milky Way. In order to make the lists more useful we present the principles of the stellar classification.

scholarly journals A Test of the Accuracy of low Dispersion Objective Prism: Spectral Classification of Late-Type Stars Using DDO Photometry

1976 ◽  
Vol 72 ◽  
pp. 73-73
Author(s):  
J. J. Clariá ◽  
W. Osborn
Keyword(s):  
Band System ◽  
Class I ◽  
Spectral Features ◽  
Spectral Classification ◽  
Late Type ◽  
Intermediate Band ◽  
Metal Abundance ◽  
Objective Prism ◽  
Low Dispersion

A test has been made of the reliability of the multidimensional classification of late-type stars from low dispersion objective prism plates recently attempted by Stock and Wroblewski. Such classification at low dispersion is difficult due to the problem of separating the effects of luminosity from those of abnormal metal abundance. A sample of the stars classified by Stock and Wroblewski as metal weak (pec) and of those classified as luminous stars (class I) were observed using the DDO intermediate-band system. The photometry shows that the stars classified as pec are indeed population II giants, of low metal abundance ([Fe/H] < −1.0). The stars classified as I, however, were found in general not to be true supergiants but rather a mixture of various types of giants, such as CN strong stars, with spectral features that resemble, in one way or another, those of higher luminosity stars.

scholarly journals Objective-Prism Surveys of the Galaxy

1994 ◽  
Vol 161 ◽  
pp. 467-469 ◽  
Author(s):  
O. Kurtanidze ◽  
M. Nikolashvili
Keyword(s):  
Milky Way ◽  
Late Type ◽  
The Galaxy ◽  
Objective Prism ◽  
Low Dispersion

The main sources of data for low dispersion objective-prism surveys of the Milky Way undertaken in the last fifteen years for the study of the distribution of late type stars, namely M and C stars, are summarized in Table 1.

scholarly journals Why We Need a Deep Spectral Survey of the Milky Way

1995 ◽  
Vol 148 ◽  
pp. 337-343 ◽  
Author(s):  
Omar M. Kurtanidze ◽  
Miriam G. Nikolashvili
Keyword(s):  
Near Infrared ◽  
Milky Way ◽  
Short Review ◽  
Late Type ◽  
Giant Stars ◽  
Infrared Spectral ◽  
Objective Prism ◽  
Type Giant ◽  
Spectral Survey ◽  
Low Dispersion

AbstractIn this short review we briefly discuss all the extensive low dispersion objective-prism spectral surveys carried out in the last fifty years for the study of the surface and space distributions of late-type giant stars, namely C stars. In the light of data obtained and new discoveries, the expediency of undertaking a deep mI low dispersion spectral survey in the near-infrared spectral region is considered.

scholarly journals The Southern Objective Prism Survey

1973 ◽  
Vol 50 ◽  
pp. 289-289
Author(s):  
J. Stock ◽  
H. Wroblewski
Keyword(s):  
High Velocity ◽  
Galactic Halo ◽  
Radial Velocities ◽  
Galactic Latitude ◽  
Early Type ◽  
Late Type ◽  
High Luminosity ◽  
High Galactic Latitude ◽  
Objective Prism ◽  
Halo Population

Five thousand sq deg of the Southern sky of intermediate to high galactic latitude have been surveyed with deep objective prism plates, taken with a UV-transparent prism. The plates reach on the average the 13th photographic magnitude and have been searched for the following types of objects: (1) high luminosity stars, (2) planetary nebulae, (3) metal weak late-type giants, (4) Me stars, (5) carbon stars, (6) early-type subdwarfs, (7) peculiar objects. Catalogues containing a total of over 3200 objects of these types have been compiled and will soon be published in Publ. Dpto. Astron. Univ. de Chile.Of particular interest are the metal-weak late-type giants, which are believed to be members of the galactic halo population. Slit spectra were obtained for a number of these stars and radial velocities derived. In each case the object was found to be a high velocity star. In view of the large number of such objects found in the survey, a method of determining relative radial velocities from pairs of objective prism plates was developed. The method, which is described in detail in the following paper, was tested successfully on several plate pairs, confirming the high velocities for the metal weak stars and showing that the method could be used for an exhaustive search for high velocity stars.

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