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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Stellar opacities in a flash

Article Abstract:

The opacity of matter has been determined at the temperatures and densities found inside stars. L.B. Da Silva and colleagues heated a thin slice of iron with an X-ray laser and then measured the iron's photo-absorption using another X-ray laser. The resulting opacity was strikingly close to the opacity tables that F.J. Rogers and C.A. Iglesias obtained through a supercomputer analysis of atomic physics. The opacity of stellar matter must be estimated indirectly since the stars' interiors cannot be seen.

Author: Guenther, D.B.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992

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Observation of high-energy neutrinos using Cerenkov detectors embedded deep in Antarctic ice

Article Abstract:

Research is presented concerning the use of Cerenkov detectors to observe low-energy neutrinos from a supernova and from the sun. Neutrinos which have been generated in the atmosphere of the Earth are also detected.

Author: He, Y.D., Andres, E., Askebjer, P., Bai, X., Barouch, G., Barwick, S.W., Bay, R.C., Becker, K.-H., Bergstrom, L., Bertrand, D., Bierenbaum, D., Biron, A., Booth, J., Botner, O., Bouchta, A., Boyce, M.M., Carius, S., Chen, A., Chirkin, D., Conrad, J., Cooley, J., Costa C.G.S., Cowen, D.F., Dailing, J., Dalberg, E., DeYoung, T., Desiati, P., Dewulf, J.-P., Doksus, P., Edsjo, J., Ekstrom, P., Erlandsson, B., Feser, T., Gaug, M., Goldschmidt, A., Goobar, A., Gray, L., Haase, H., Hallgren, A., Halzen, F., Hanson, K., Hardtke, R., Hellwig, M., Heukenkamp, H., Hill, G.C., Hulth, P.O., Hundertmark, S., Jacobsen, J., Kandhadai, V.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
Usage, Observations, Neutrinos, Cherenkov counters

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A stellar performance

Article Abstract:

Research is presented describing the study of stellar creation using a time-lapse telescope system which monitors the birth of a star over a period of time.

Author: Marvel, Kevin
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001

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Subjects list: Research, Stars, Astrophysics
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