Results 31 to 40 of about 21,010 (191)

Primordial Nucleosynthesis: Theory and Observations [PDF]

, 1999
We review the Cosmology and Physics underlying Primordial Nucleosynthesis and survey current observational data in order to compare the predictions of Big Bang Nucleosynthesis with the inferred primordial abundances. From this comparison we report on the
Burles, Burles, Dearborn, Deliyannis, Dicus, Dodelson, Epstein, Fields, Fields, Fields, Fields, Fields, Fiorentini, Fixsen, Fukugita, Galli, Galli, Gary Steigman, Hata, Heckler, Hubble, Izotov, Kawasaki, Keith A Olive, Kolb, Krishnamurthi, Levshakov, Levshakov, Levshakov, Linsky, Lopez, Lopez, Mahaffy, Olive, Olive, Olive, Olive, Olive, Pagel, Penzias, Persic, Reeves, Rood, Sarkar, Scully, Skillman, Smith, Smoot, Songaila, Steigman, Steigman, Steigman, Steigman, Terry P Walker, Thomas, Thorburn, Tosi, Vidal-Madjar, Wagoner, Walker, Webb, Yang, Yang   +62 more
core   +2 more sources

Does the CMB prefer a leptonic Universe?

New Journal of Physics, 2013
Recent observations of the cosmic microwave background at smallest angular scales and updated abundances of primordial elements indicate an increase of the energy density and the helium-4 abundance with respect to standard big bang nucleosynthesis with ...
Dominik J Schwarz, Maik Stuke
doaj   +1 more source

Constraining neutrino physics with BBN and CMBR [PDF]

, 2001
We perform a likelihood analysis of the recent results on the anisotropy of Cosmic Microwave Background Radiation from the BOOMERanG and DASI experiments to show that they single out an effective number of neutrinos in good agreement with standard Big ...
Hansen, S. H., Mangano, G., Melchiorri, A., Miele, G., Pisanti, O.   +4 more
core   +2 more sources

Lorentz invariance violation in the neutrino sector: a joint analysis from big bang nucleosynthesis and the cosmic microwave background

European Physical Journal C: Particles and Fields, 2017
We investigate constraints on Lorentz invariance violation in the neutrino sector from a joint analysis of big bang nucleosynthesis and the cosmic microwave background.
Wei-Ming Dai, Zong-Kuan Guo, Rong-Gen Cai, Yuan-Zhong Zhang   +3 more
doaj   +1 more source

Experimental studies on astrophysical reactions at the low-energy RI beam separator CRIB [PDF]

EPJ Web of Conferences, 2022
Experimental studies on astrophysical reactions involving radioactive isotopes (RI) often accompany technical challenges. Studies on such nuclear reactions have been conducted at the low-energy RI beam separator CRIB, operated by Center for Nuclear Study,
Yamaguchi H., Hayakawa S., Ma N.R., Shimizu H., Okawa K., Yang L., Kahl D., La Cognata M., Lamia L., Abe K., Beliuskina O., Cha S.M., Chae K.Y., Cherubini S., Figuera P., Ge Z., Gulino M., Hu J., Inoue A., Iwasa N., Kim A., Kim D., Kiss G., Kubono S., La Commara M., Lattuada M., Lee E.J., Moon J.Y., Palmerini S., Parascandolo C., Park S.Y., Phong V. H., Pierroutsakou D., Pizzone R.G., Rapisarda G.G., Romano S., Spitaleri C., Tang X.D., Trippella O., Tumino A., Zhang N.T., Lam Y.H., Heger A., Jacobs A.M., Xu S.W., Ma S.B., Ru L.H., Liu E.Q., Liu T., Hamill C.B., St J. Murphy A., Su J., Fang X., Kwag M.S., Duy N.N., Uyen N.K., Kim D.H., Liang J, Psaltis A., Sferrazza M., Johnston Z., Li Y.Y.   +61 more
doaj   +1 more source

Lithium-Beryllium-Boron : Origin and Evolution [PDF]

, 1999
The origin and evolution of Lithium-Beryllium-Boron is a crossing point between different astrophysical fields : optical and gamma spectroscopy, non thermal nucleosynthesis, Big Bang and stellar nucleosynthesis and finally galactic evolution. We describe
Anders, Angulo, Audouze, Bernas, Biermann, Binns, Boesgaard, Boesgaard, Burbidge, Bykov, Bykov, Bykov, Cassé, Cassé, Cassé, Cassé, Caughlan, Cayrel, Cayrel, Cayrel, Cecil, Chaussidon, Drury, Duncan, Duncan, Elisabeth Vangioni-Flam, Ellison, Ellison, Fields, Fields, Fields, Fields, Fulbright, García-López, Gilmore, Hartmann, Higdon, Hobbs, Hobbs, Hobbs, Hobbs, Israelian, Jean Audouze, Jones, Kiener, Kiselman, Kiselman, Lemoine, Lemoine, Lingenfelter, Mac Williams, Meneguzzi, Meneguzzi, Mewaldt, Meyer, Meyer, Meyer, Meynet, Michel Cassé, Mohr, Molaro, Molaro, Mori, Moskalenko, Nollet, Olive, Parizot, Parizot, Parizot, Parizot, Parizot, Pinsonneault, Raisbeck, Ramaty, Ramaty, Ramaty, Ramaty, Read, Rebolo, Reeves, Reeves, Ryan, Ryan, Ryan, Ryan, Schramm, Seo, Shapiro, Smith, Steigman, Strong, Strong, Tatischeff, Thielemann, Thomas, Thomas, Thévenin, Vangioni-Flam, Vangioni-Flam, Vangioni-Flam, Vangioni-Flam, Vangioni-Flam, Vauclair, Weaver, Webber, Westphal, Woosley, Woosley   +107 more
core   +3 more sources

How do atomic code uncertainties affect abundance measurements in the intracluster medium?

Astronomische Nachrichten, Volume 341, Issue 2, Page 203-209, February 2020., 2020
Abstract Accurate chemical abundance measurements of X‐ray‐emitting atmospheres pervading massive galaxies, galaxy groups, and clusters provide essential information on the star formation and chemical enrichment histories of these large‐scale structures.
François Mernier, Norbert Werner, Kiran Lakhchaura, Jelle de Plaa, Liyi Gu, Jelle S. Kaastra, Junjie Mao, Aurora Simionescu, Igone Urdampilleta   +8 more
wiley   +1 more source

Supergravity Model of Inflation and Explaining IceCube HESE Data via PeV Dark Matter Decay

Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020
We construct a unified model of inflation and PeV dark matter with an appropriate choice of no‐scale Kähler potential, superpotential, and gauge kinetic function in terms of MSSM fields and hidden sector Polonyi field. The model is consistent with the CMB observations and can explain the PeV neutrino flux observed at IceCube HESE.
Girish Kumar Chakravarty, Najimuddin Khan, Subhendra Mohanty, Ricardo G. Felipe   +3 more
wiley   +1 more source

Underground Nuclear Astrophysics: Present and future of the LUNA experiment [PDF]

EPJ Web of Conferences, 2019
The evolution of celestial bodies is regulated by gravitation and thermonuclear reaction rates, while the Big Bang nucleosynthesis is the result of nuclear processes in a rapidly expanding Universe.
Gustavino Carlo
doaj   +1 more source

Inhomogeneous Big-Bang Nucleosynthesis in Light of Recent Observations [PDF]

, 1998
We consider inhomogeneous big bang nucleosynthesis in light of the present observational situation. Different observations of He-4 and D disagree with each other, and depending on which set of observations one uses, the estimated primordial He-4 ...
Kainulainen, K., Kurki-Suonio, H., Sihvola, E.   +2 more
core   +2 more sources