The tension in these dark-matter models has forced astrophysicists to consider some more astrophysically prosaic options.
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Ultimately, the new paper "falls short of being an astrophysically plausible explanation for the anomalous structure of the distant solar system," he said.
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" Katie Mack is an assistant professor of physics at North Carolina State University and author of the forthcoming "The End of Everything (Astrophysically Speaking).
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The detection of the CIB is both observationally and astrophysically very challenging. It has a very few characteristics which can be used to separate it from the foregrounds. One major point is, that the CIB must be isotropic, i.e. one has to measure the same CIB value all over the sky.
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Solem worked on a universal, astrophysically-based theory of the origin of life by natural processes arising from non-living matter starting with the minimum possible information, or the minimum possible departure from thermodynamic equilibrium, along with thermodynamically free energy. He developed underlying physical criteria for the minimum size necessary for molecules in order to become self- replicating (2003a).
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Nahar has published extensively on radiative and collisional atomic processes in astrophysical and laboratory plasmas, including Photoionization, electron-ion recombination,"Electron-Ion Recombination Rate Coefficients, Photoionization Cross Sections, and Ionization Fractions for Astrophysically Abundant Elements. I. Carbon and Nitrogen", S. N. Nahar and A. K. Pradhan, in The Astrophysical Journal, vol. 111, no. 339, 1997 photo- excitations and de-excitations, and electron-ion scattering.
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Data analysis methods routinely make use of the fact that these linearized waves can be Fourier decomposed.For example Some exact solutions describe gravitational waves without any approximation, e.g., a wave train traveling through empty space or Gowdy universes, varieties of an expanding cosmos filled with gravitational waves., But for gravitational waves produced in astrophysically relevant situations, such as the merger of two black holes, numerical methods are presently the only way to construct appropriate models.
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She has also worked on dielectronic satellite lines, theoretical spectroscopy, and computational nanospectroscopy for biomedical applications."Space secrets could lead to cancer therapies", Times of India, July 29, 2011"Could Black Holes Help Treat Cancer Patients?", Fox News, July 28, 2011 She is a member of the international collaborations, "Opacity Project" and "Iron Project,""Atomic Data from the Iron Project", S. N. Nahar, in Astronomy and Astrophysics, 293, 967-977, 1995 to study radiative and collisional atomic processes and calculate accurate atomic parameters for astrophysically abundant atoms and ions.
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The first balloon flight with the new instrument was made on 28 April 1968 in which observations of Scorpius X-1 were successfully carried out. In a succession of balloon flights made with this instrument between 1968 and 1974 a number of binary X-ray sources including Cyg X-1 and Her X-1, and the diffuse cosmic X-ray background were studied. Many new and astrophysically important results were obtained from these observations. ISRO played a role in the discovery of three species of bacteria in the upper stratosphere at an altitude of between .
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NASA conception of IXO, mirror view, artist's impression. IXO scientific goals require gathering many pieces of information using different techniques such as spectroscopy, timing, imaging, and polarimetry. Therefore, IXO will carry a range of detectors, which will provide complementary spectroscopy, imaging, timing, and polarimetry data on cosmic X-ray sources to help disentangle the physical processes occurring in them. Two high-resolution spectrometers, a microcalorimeter (XMS or cryogenic imaging spectrograph (CIS)) and a set of dispersive gratings (XGS) will provide high-quality spectra over the 0.1–10 keV bandpass where most astrophysically abundant ions have X-ray lines.
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Schematic diagram of a black hole spin-flip. A black hole spin-flip occurs when the spin axis of a rotating black hole undergoes a sudden change in orientation due to absorption of a second (smaller) black hole. Spin-flips are believed to be a consequence of galaxy mergers, when two supermassive black holes form a bound pair at the center of the merged galaxy and coalesce after emitting gravitational waves. Spin-flips are significant astrophysically since a number of physical processes are associated with black hole spins; for instance, jets in active galaxies are believed to be launched parallel to the spin axes of supermassive black holes.
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Nahar won John Wheatley award for: "For efforts to promote physics research and teaching through collaboration, mentoring, and philanthropy in several third-world countries, and in particular for her promotion, as both an advocate and role model, of Muslim women scientists." She was elected as a Fellow of the American Physical Society in 2006, for "seminal contributions to studies of photoionization and recombination of multicharged atomic systems fundamental to atomic physics and plasma physics and pioneering calculations of remarkable complexity on astrophysically significant processes". In 2013 she won the John Wheatley Award of the American Physical Society "for efforts to promote physics research and teaching through collaboration, mentoring, and philanthropy in several third- world countries, and in particular for her promotion, as both an advocate and role model, of Muslim women scientists".
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A LISA-like instrument should be able to measure relative displacements with a resolution of 20 picometres—less than the diameter of a helium atom—over a distance of a million kilometres, yielding a strain sensitivity of better than 1 part in 1020 in the low-frequency band about a millihertz. A LISA-like detector is sensitive to the low-frequency band of the gravitational-wave spectrum, which contains many astrophysically interesting sources. Such a detector would observe signals from binary stars within our galaxy (the Milky Way); signals from binary supermassive black holes in other galaxies; and extreme-mass-ratio inspirals and bursts produced by a stellar- mass compact object orbiting a supermassive black hole. There are also more speculative signals such as signals from cosmic strings and primordial gravitational waves generated during cosmological inflation.
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Few months after Fostiropoulos began his research on the strange soot Krätschmer recommended to stop this vain undertaking and focus on astrophysically relevant carbon clusters like C2, C3, C4...Harry Kroto about those who deny the existence of C60 in space Therefore, Fostiropoulos decided to waste 18 months (= Ph.D. halftime) playing football and if there would be no positive result he would switch to "reasonable" carbon clusters. After 12 months intensive research, however, he succeeded to prove the existence of the all-carbon molecule with icosahedral symmetry (isotopic 13C60) and after 15 months (around 1 May 1990) he had optimized the synthesis yield and accomplished to extract the fullerene powder from the soot. After 18 months they submitted their NATURE publication. In summer 1990 during a cooperation at the Heidelberg University on Raman spectroscopy to verify the hypothetical "football" structure of the molecule one of the partners expressed carefully his concerns: "hopefully it is not a cold fusion ;-)" referring to the most famous erratum at that time published by Martin Fleischmann et al. 1989.
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