Books > Science & Mathematics > Physics > Applied physics & special topics > Astrophysics
|
Buy Now
Astrophysik II: Sternaufbau / Astrophysics II: Stellar Structure (English, German, French, Paperback, Softcover reprint of the original 1st ed. 1958)
Loot Price: R3,162
Discovery Miles 31 620
|
|
Astrophysik II: Sternaufbau / Astrophysics II: Stellar Structure (English, German, French, Paperback, Softcover reprint of the original 1st ed. 1958)
Series: Handbuch der Physik Encyclopedia of Physics, 11 / 51
Expected to ship within 10 - 15 working days
|
Sects. 12, 13. 89 sequence and that subgiant and fainter stars in
globular clusters have ultraviolet excesses. When dealing with
stars whose physical properties are imperfectly under stood, such
as in globular cluster stars, we cannot rely too heavily on the
empiri cal calibration by the kinds of stars used to define Fig. 5,
to determine their true, unreddened U-B, B-V curve. But if by a
combination of arguments, principally the reddening in the region
of the stars we do known about, we can assign a fairly probable
unreddened U-B, B-V curve to a group of stars about which we know
little, the argument may be turned around. In this case some
information may be gained about the energy envelope of the stars by
examining the differences between the normal two-color index curves
for the unknown group of stars compared to the known. In general
there seem to be two possible causes for different stars defining
different normal sequences in the U-B, B-V plane. One, the relative
energy distribution in the continuum in the U, B and V photometry
bands are different. An example of this is the effect of the Balmer
depression in supergiants. This, of course, requires deviation from
black body radiation curves for one or both groups of stars. This
cause seems to be the dominant effect for very blue, hot stars
where the depression of the continuum by absorption lines is at a
minimum."
General
Is the information for this product incomplete, wrong or inappropriate?
Let us know about it.
Does this product have an incorrect or missing image?
Send us a new image.
Is this product missing categories?
Add more categories.
Review This Product
No reviews yet - be the first to create one!
|
|
Email address subscribed successfully.
A activation email has been sent to you.
Please click the link in that email to activate your subscription.