Results 31 to 40 of about 21,366 (192)

New worlds, new chemistry, new ceramics

International Journal of Ceramic Engineering &Science, Volume 3, Issue 6, Page 252-266, November 2021., 2021
Space missions have documented the chemical diversity and complexity of planets and moons in our own solar system. Astronomers have found thousands of exoplanets orbiting other stars in our galaxy, whose diversity implies immense chemical, ceramic, geological, and mineralogical complexity.
Alexandra Navrotsky, Megan Householder
wiley   +1 more source

Big Bang Nucleosynthesis hunts chameleon dark matter

Journal of High Energy Physics, 2020
We study the chameleon field dark matter, dubbed scalaron, in F (R) gravity in the Big Bang Nucleosynthesis (BBN) epoch. With an R 2-correction term required to solve the singularity problem for F (R) gravity, we first find that the scalaron dynamics is ...
Hua Chen, Taishi Katsuragawa, Shinya Matsuzaki, Taotao Qiu   +3 more
doaj   +1 more source

Laboratory exploration of mineral precipitates from Europa's subsurface ocean

Journal of Applied Crystallography, Volume 54, Issue 5, Page 1455-1479, October 2021., 2021
Precipitation experiments from a model Europan ocean solution subjected to fast and slow freezing suggest that the highly hydrated Na–Mg sulfate phase Na2Mg(SO4)2·16H2O is one of the lowest‐temperature mineral phases likely to be stable on Europa's surface and may therefore be astrobiologically significant.The precipitation of hydrated phases from a ...
Stephen P. Thompson, Hilary Kennedy, Benjamin M. Butler, Sarah J. Day, Emmal Safi, Aneurin Evans   +5 more
wiley   +1 more source

Reheating Temperature and Gauge Mediation Models of Supersymmetry Breaking [PDF]

, 2009
For supersymmetric theories with gravitino dark matter, the maximal reheating temperature consistent with big bang nucleosynthesis bounds arises when the physical gaugino masses are degenerate.
A. Rizzi ., B. Bajc, C. Cheung, C.F. Berger, CDF collaboration, D.G. Cerdeno, D.G. Cerdeno, G. Hiller, G.F. Giudice, J.A. Bagger, J.L. Feng, J.R. Ellis, James D Wells, K. Jedamzik, K. Jedamzik, K.-Y. Choi, Krzysztof Turzyński, L. Covi, L. Roszkowski, L.M. Carpenter, LEP2 SUSY working group, M. Buican, M. Ratz, Marek Olechowski, S. Antusch, S. Bailly, Stefan Pokorski, WMAP collaboration, Z. Lalak   +28 more
core   +2 more sources

Non-universal scalar-tensor theories and big bang nucleosynthesis [PDF]

, 2008
We investigate the constraints that can be set from big-bang nucleosynthesis on two classes of models: extended quintessence and scalar-tensor theories of gravity in which the equivalence principle between standard matter and dark matter is violated.
Alain Coc, B. D. Fields, C. Will, C. M. Will, Elisabeth Vangioni, I. I. Shapiro, J.-P. Uzan, J. D. Barrow, J. D. Barrow, Jean-Philippe Uzan, K. Arai, Keith A. Olive, M. Fierz   +12 more
core   +3 more sources

Underground measurement at LUNA found no evidence for a low-energy resonance in the 6Li(p, γ)7Be reaction [PDF]

EPJ Web of Conferences, 2022
The 6Li(p,γ)7Be reaction is involved in all three main nucleosynthesis scenarios: Big Bang Nucleosynthesis, the interaction of cosmic rays with interstellar matter, and stellar nucleosynthesis.
Piatti Denise
doaj   +1 more source

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

THE ²H(alpha, gamma)⁶LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS

Acta Polytechnica, 2013
The 2H(α, γ)6Li reaction is the leading process for the production of 6Li in standard Big Bang Nucleosynthesis. Recent observations of lithium abundance in metal-poor halo stars suggest that there might be a 6Li plateau, similar to the well-known Spite ...
Carlo Gustavino
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

My Name Is Forrest Mozer

, 2022
Perspectives of Earth and Space Scientists, Volume 3, Issue 1, December 2022.
Forrest Mozer
wiley   +1 more source