Results 91 to 100 of about 248,477 (327)

The Godel metric in the Chern-Simons modified gravity

, 2012
We discuss the consistency of the Godel metric within the Chern-Simons modified gravity, both for external and dynamical Chern-Simons coefficients.Comment: 6 pages; to be published in the Proceedings of 5th International Workshop on Astronomy and ...
Furtado, C., Mariz, T., Nascimento, J. R., Petrov, A. Yu., Santos, A. F.   +4 more
core   +1 more source

The solar system Fe/Mg ratio

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 529-543, March 2025.
Abstract Solar wind Fe and Mg fluences (atoms/cm2) were measured from Genesis collectors. Fe and Mg have similar first ionization potentials and solar wind Fe/Mg should equal the solar ratio. Solar wind Fe/Mg is a more valid measure of solar composition than CI chondrites and can be measured more accurately than spectroscopic photospheric abundances ...
D. S. Burnett, A. J. G. Jurewicz, D. S. Woolum, Y. Guan, V. S. Heber, R. Hervig, M. Humayun, K. D. McKeegan, L. R. Nittler, C. T. Olinger, D. B. Reisenfeld, J. Wang   +11 more
wiley   +1 more source

Hard X-ray and Soft Gamma Ray Polarimetry with CdTe/CZT Spectro-Imager

Galaxies, 2018
CdTe/CZT based spectroscopic two-dimensional (2D)/three-dimensional (3D) imagers when operated in the Compton regime can work as high performance scattering polarimeters, for high-energy astrophysics.
Ezio Caroli, Miguel Moita, Rui M. Curado da Silva, Stefano Del Sordo, Giovanni de Cesare, Jorge M. Maia, Marcela Pàscoa   +6 more
doaj   +1 more source

Policy opportunities [PDF]

Recommendations are given regarding National Science Foundation (NSF) astronomy programs and the NASA Space Astrophysics program. The role of ground based astronomy is reviewed.
Acton, Loren W., Bahcall, Neta A., Bless, Robert C., Brown, Robert A., Burbidge, Geoffrey, Burke, Bernard F., Clark, George W., Cordova, France A., Mccray, Richard, Ostriker, Jeremiah P.   +9 more
core   +1 more source

The Wide Field Spectrograph (WiFeS): Performance and Data Reduction

, 2010
This paper describes the on-telescope performance of the Wide Field Spectrograph (WiFeS). The design characteristics of this instrument, at the Research School of Astronomy and Astrophysics (RSAA) of the Australian National University (ANU) and mounted ...
Bloxham, Gabe, Busarello, Gianni, Dopita, Michael, Farage, Catherine, Firth, Peter, Green, Anthony, McGregor, Peter, Merluzzi, Paola, Neilson, Jon, Rhee, Jonghwan, Roberts, Bill, Wilson, Greg, Young, Peter   +12 more
core   +1 more source

Mid‐infrared detection and characterization of refractory inclusions in CM and CO chondrites: A non‐destructive approach for returned space samples

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 544-569, March 2025.
Abstract Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample‐return missions, a non‐destructive and non‐invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed.
Jean Charlier, Alice Aléon‐Toppani, Rosario Brunetto, Jérôme Aléon, Ferenc Borondics   +4 more
wiley   +1 more source

Computing and data processing [PDF]

The applications of computers and data processing to astronomy are discussed. Among the topics covered are the emerging national information infrastructure, workstations and supercomputers, supertelescopes, digital astronomy, astrophysics in a numerical ...
Arnett, David W., Cameron, Alastair G. W., Crutcher, Richard M., Helfand, David J., Horowitz, Paul, Kleinmann, Susan G., Linsky, Jeffrey L., Madore, Barry F., Press, William, Smarr, Larry   +9 more
core   +1 more source

VIS‐to‐MIR reflectance and Raman spectroscopy of the CM2 NWA 12184 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 570-595, March 2025.
Abstract The spectral analysis of CM meteorites can help to constrain the mineralogical composition of their parent body, the C‐type asteroids. The CM2 NWA 12184 was spectrally examined employing seven complementary techniques at different spatial resolutions, including VIS‐to‐MIR reflectance and Raman spectroscopy.
A. Galiano, F. Dirri, M. Ferrari, C. Carli, E. Bruschini, G. Filacchione, G. Piccioni, E. Palomba, S. Stefani, A. Raponi, M. Ciarniello, M. E. Palumbo, C. Scirè Scappuzzo, G. Baratta, R. G. Urso, L. Inno   +15 more
wiley   +1 more source

Women in Physics: an interview with Lyndsay Fletcher

Communications Physics
Lyndsay Fletcher is a Professor of Astrophysics, specialising in solar physics, in the School of Physics and Astronomy, University of Glasgow and the Rosseland Centre for Solar Physics, University of Oslo.
doaj   +1 more source

Editorial: Physical Review D expands coverage of astrophysics and astronomy [PDF]

, 2022
Mirjam Cvetič, Urs M. Heller
openalex   +1 more source