Results 51 to 60 of about 67,587 (268)

Spitzer Resurrector Mission: Advantages for Space Weather Research and Operations

Aerospace
In 1979, NASA established the Great Observatory program, which included four telescopes (Hubble, Compton, Chandra, and Spitzer) to explore the Universe.
Shawn M. Usman, Giovanni G. Fazio, Christopher A. Grasso, Ryan C. Hickox, Cameo Lance, William B. Rideout, Daveanand M. Singh, Howard A. Smith, Angelos Vourlidas, Joseph L. Hora, Gary J. Melnick, Matthew Ashby, Volker Tolls, Steven Willner, Salma Benitez   +14 more
doaj   +1 more source

Margherita Hack's Astrophysics at the Asiago Astrophysical Observatory

, 2023
Conference paper "HACK100: Past, Present and Future of Astrophysical Spectroscopy", International Conference, Trieste, 6-10 June ...
Umbriaco, G., Bianchini, A., Pizzella, A., Siviero, A., Coran, G., Ochner, P., Montalto, M., Bazzicalupo, M., Colasanto, P.   +8 more
openaire   +4 more sources

Quenching the Hubbard Model: Comparison of Nonequilibrium Green's Function Methods

Contributions to Plasma Physics, EarlyView.
ABSTRACT We benchmark nonequilibrium Green's function (NEGF) approaches for interaction quenches in the half‐filled Fermi–Hubbard model in one and two dimensions. We compare fully self‐consistent two‐time Kadanoff–Baym equations (KBE), the generalized Kadanoff–Baym ansatz (GKBA), and the recently developed NEGF‐based quantum fluctuations approach (NEGF‐
Jan‐Philip Joost, Christopher Makait, Alexander Osterkorn, Erik Schroedter   +3 more
wiley   +1 more source

Massive Black Hole Formation in Proto-Stellar Clusters via Early Gas Accretion

Particles
In this paper, we review our semi-analytic model of stellar black hole (BH) mass growth via gas accretion in gas-rich stellar clusters during their birthstage within the first ∼10Myr after the first stellar formation event.
Zacharias Roupas
doaj   +1 more source

The Virial Expansion of the Hydrogen Equation of State in Comparison to PIMC Simulations: The Quasiparticle Concept, IPD, and Ionization Degree

Contributions to Plasma Physics, EarlyView.
ABSTRACT The properties of plasmas in the low‐density limit are described by virial expansions. Analytical expressions are known for the lowest virial coefficients from Green's function approaches. Recently, accurate path‐integral Monte Carlo (PIMC) simulations were performed for the hydrogen plasma at low densities by Filinov and Bonitz (Phys. Rev.
Gerd Röpke, Chengliang Lin, W. Ebeling, H. Reinholz   +3 more
wiley   +1 more source

The need for ultra high resolution X-ray imaging

Frontiers in Astronomy and Space Sciences
This paper discusses the broad science case for obtaining milliarcsecond to microarcsecond astronomical imaging resolution in the soft to medium-energy X-ray band (∼0.5 to ∼8 keV).
Kimberly A. Weaver, Jenna M. Cann, Jenna M. Cann, Jenna M. Cann, Ryan Pfeifle, Ryan Pfeifle, Ryan Pfeifle, Miranda McCarthy, Miranda McCarthy, Laura D. Vega, Laura D. Vega, Laura D. Vega, Ronald S. Gamble, Ronald S. Gamble, Ronald S. Gamble, Teresa Monsue, Teresa Monsue, Teresa Monsue, Kyla Mullaney, Kyla Mullaney, Kyla Mullaney, Mainak Singha, Mainak Singha, Mainak Singha, Erini Lambrides, Erini Lambrides, Erini Lambrides, Jeffrey McKaig, Jeffrey McKaig, Isabella Carlton, Kelly Whalen, Kelly Whalen, Emma Kleiner, Atul Mohan, Atul Mohan, Subhajeet Karmakar, Subhajeet Karmakar, Ann E. Hornschemeier, Herbert Ortiz, Claudio Ricci, Claudio Ricci, Claudio Ricci, Lynne Valencic, Lynne Valencic, Brandon Coleman, Brandon Coleman, Kaylee DeGennaro, Ruchi Pandey, Ruchi Pandey   +48 more
doaj   +1 more source

Narrating the origin of the universe through music: A case study [PDF]

Zbornik Radova Akademije Umetnosti, 2017
Our project is about the synthesis of a musical piece, based on the timeline of the Universe. We can understand music through visual and gestural analogies.
Mannone Maria, Gkoudina Kyriaki, Tyler Evan   +2 more
doaj  

Astrophysical symmetries [PDF]

Proceedings of the National Academy of Sciences, 1996
Astrophysical objects, ranging from meteorites to the entire universe, can be classified into about a dozen characteristic morphologies, at least as seen by a blurry eye. Some patterns exist over an enormously wide range of distance scales, apparently as a result of similar underlying physics.
openaire   +4 more sources

Kinetic Contribution to the Arbitrary Order Odd Frequency Moments of the Dynamic Structure Factor

Contributions to Plasma Physics, EarlyView.
ABSTRACT An exact expression is derived for the kinetic contribution to the odd (arbitrary order) frequency moments of the dynamic structure factor via a finite summation that features averages of even (all lower orders) powers of the momentum over the exact momentum distribution.
Panagiotis Tolias, Tobias Dornheim, Jan Vorberger   +2 more
wiley   +1 more source

Dynamical Analysis of the Redshift Drift in FLRW Universes

Universe
Redshift drift is the phenomenon whereby the observed redshift between an emitter and observer comoving with the Hubble flow in an expanding FLRW universe will slowly evolve—on a timescale comparable to the Hubble time.
Francisco S. N. Lobo, José Pedro Mimoso, Jessica Santiago, Matt Visser   +3 more
doaj   +1 more source