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Abundance Effects in Classification - Dedicated to W.W. Morgan (Paperback, Softcover reprint of the original 1st ed. 1976)
Loot Price: R4,228
Discovery Miles 42 280
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Abundance Effects in Classification - Dedicated to W.W. Morgan (Paperback, Softcover reprint of the original 1st ed. 1976)
Series: International Astronomical Union Symposia, 72
Expected to ship within 10 - 15 working days
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The general discussions of the roles of photometric and
spectroscopic classification at Cordoba in 1971 (lAU Symposium No.
50), and of the calibration of classification indices at Geneva in
1972 (IAU Symposium No. 54), revealed clearly the steadily in
creasing importance of abundance parameters. The multipliCity of
these, however, raised so many new problems that it was logical
that the 1975 meeting at Lausanne should be concerned with ways in
which differences in abundance affect both spectral types and
photometric indices. Commissions 29 and 36 joined with Commission
45 in sponsoring this Symposium. Since the date of the meeting came
shortly after the formal retirement of Professor William W. Morgan
from the University of Chicago, it was quickly agreed that this
meeting should be dedicated to him in recognition of his unique
contributions to spectral classification. In the opening paper of
the Symposium Dr. Bengt Stromgren has summarized these. To his
remarks we should add only that it was about 1940 that Morgan first
distinguished the group of G- and K-type stars with weak CN bands
and metallic lines - stars which have since been recognized as
having the abundance of all metals relative to hydrogen much lower
than in stars of the solar population. Spectra of two of these, HD
81192 (Boss 2527) and 8 Lep, were later shown as examples of the
group in the Yerkes Atlas of 1943."
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