کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1771111 | 1020726 | 2006 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A likelihood method for measuring the ultrahigh energy cosmic ray composition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A likelihood method for measuring the ultrahigh energy cosmic ray composition A likelihood method for measuring the ultrahigh energy cosmic ray composition](/preview/png/1771111.png)
چکیده انگلیسی
Air fluorescence detectors traditionally determine the dominant chemical composition of the ultrahigh energy cosmic ray flux by comparing the averaged slant depth of the shower maximum, Xmax, as a function of energy to the slant depths expected for various hypothesized primaries. In this paper, we present a method to make a direct measurement of the expected mean number of protons and iron by comparing the shapes of the expected Xmax distributions to the distribution for data. The advantages of this method includes the use of information of the full distribution and its ability to calculate a flux for various cosmic ray compositions. The same method can be expanded to marginalize uncertainties due to choice of spectra, hadronic models and atmospheric parameters. We demonstrate the technique with independent simulated data samples from a parent sample of protons and iron. We accurately predict the number of protons and iron in the parent sample and show that the uncertainties are meaningful.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 26, Issue 1, August 2006, Pages 28-40
Journal: Astroparticle Physics - Volume 26, Issue 1, August 2006, Pages 28-40
نویسندگان
R.U. Abbasi, T. Abu-Zayyad, J.F. Amman, G.C. Archbold, K. Belov, S.A. Blake, J.W. Belz, S. BenZvi, D.R. Bergman, J.H. Boyer, G.W. Burt, Z. Cao, B.M. Connolly, W. Deng, Y. Fedorova, J. Findlay, C.B. Finley, W.F. Hanlon, A. Zech,