The Formation of Primordial Luminous Objects - SLAC
... regimes. In the wavelength range λFS ≤ λ ≤ λeq the growth of fluctuations pauses between the time they enter the Hubble radius and teq . As a result the slope of the processed spectrum is changed, and P (k) ∝ k ns −4 ≃ k −3 . Instead, at scales λ > λeq all the fluctuations keep growing at the same r ...
... regimes. In the wavelength range λFS ≤ λ ≤ λeq the growth of fluctuations pauses between the time they enter the Hubble radius and teq . As a result the slope of the processed spectrum is changed, and P (k) ∝ k ns −4 ≃ k −3 . Instead, at scales λ > λeq all the fluctuations keep growing at the same r ...
Transformations of energy
... Main articles: History of energy and Timeline of thermodynamics, statistical mechanics, and random processes The word energy derives from Greek ἐνέργεια (energeia), which appears for the first time in the work Nicomachean Ethics[3] of Aristotle in the 4th century BC. In 1021 AD, the Arabian physicis ...
... Main articles: History of energy and Timeline of thermodynamics, statistical mechanics, and random processes The word energy derives from Greek ἐνέργεια (energeia), which appears for the first time in the work Nicomachean Ethics[3] of Aristotle in the 4th century BC. In 1021 AD, the Arabian physicis ...
The Mass of Quasar Broad Emission Line Regions
... =4, Nionized is the column density of ionized gas, Lion, 45 is the ionizing continuum luminosity in units of 1045 ergs s1, N is an ionization parameter defined as the ratio of radiation to gas pressures, and nH, 10 is the density of hydrogen in units of 1010 cm3. A cursory reading of these texts w ...
... =4, Nionized is the column density of ionized gas, Lion, 45 is the ionizing continuum luminosity in units of 1045 ergs s1, N is an ionization parameter defined as the ratio of radiation to gas pressures, and nH, 10 is the density of hydrogen in units of 1010 cm3. A cursory reading of these texts w ...
Turbulent Flow-Driven Molecular Cloud Formation: A Solution to the
... yet the ages of the stars produced by these clouds provide uniquely detailed constraints on cloud ages that are not obtainable in any other way (e.g., Hartmann et al. 1991; Feigelson 1996). Because of the importance of the stellar population ages, it is worth reviewing the situation in some detail, ...
... yet the ages of the stars produced by these clouds provide uniquely detailed constraints on cloud ages that are not obtainable in any other way (e.g., Hartmann et al. 1991; Feigelson 1996). Because of the importance of the stellar population ages, it is worth reviewing the situation in some detail, ...
A forming disk at z 0.6: collapse of a gaseous disk or major merger
... excess of velocity dispersion, find a common explanation. Shocks produced during the merger in this region can be ionized easily and heat the gas while preventing star formation. This makes this scenario more satisfactory than the collapse of a pre-existing, gas-rich rotating disk. Key words. galaxi ...
... excess of velocity dispersion, find a common explanation. Shocks produced during the merger in this region can be ionized easily and heat the gas while preventing star formation. This makes this scenario more satisfactory than the collapse of a pre-existing, gas-rich rotating disk. Key words. galaxi ...
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Chapter 2 Observing the Electromagnetic Spectrum
... mount appear in the infrared image as bright red, representing a 15◦ C increase in temperature above surrounding structures. This nuisance radiation is also minimized by cooling and reducing the surface area along the optical path of instruments. The Near-IR background sky is also very bright and hi ...
... mount appear in the infrared image as bright red, representing a 15◦ C increase in temperature above surrounding structures. This nuisance radiation is also minimized by cooling and reducing the surface area along the optical path of instruments. The Near-IR background sky is also very bright and hi ...
Accretion Disk Assembly During Common Envelope Evolution
... two-dimensional simulations with an exponentially decreasing density gradient for radiation pressure dominated (γ = 4/3) flows. They use a cylindrical geometry and assume a reflective inner boundary condition. Under these conditions, they found a stable centrifugally supported structure forming in t ...
... two-dimensional simulations with an exponentially decreasing density gradient for radiation pressure dominated (γ = 4/3) flows. They use a cylindrical geometry and assume a reflective inner boundary condition. Under these conditions, they found a stable centrifugally supported structure forming in t ...
International Journal of Advanced Research in Biological
... The newer and exceptionally unique properties of a wonderful material called “graphene”, present in a simple mark of a pencil, has evoked a deluge of research interest internationally. But what is probably more unexpected is the news that it is not only just the thinnest of all possible materials, i ...
... The newer and exceptionally unique properties of a wonderful material called “graphene”, present in a simple mark of a pencil, has evoked a deluge of research interest internationally. But what is probably more unexpected is the news that it is not only just the thinnest of all possible materials, i ...
Thermal conduction effects on the kink instability in coronal loops
... For a typical coronal plasma, the timescales for heat conduction are normally much longer than those for ideal MHD instabilities (Hood 1990). Hence analytical and numerical studies of the ideal kink instability in the low-β plasma of the solar corona have omitted thermal conductivity, where the plas ...
... For a typical coronal plasma, the timescales for heat conduction are normally much longer than those for ideal MHD instabilities (Hood 1990). Hence analytical and numerical studies of the ideal kink instability in the low-β plasma of the solar corona have omitted thermal conductivity, where the plas ...
Next Generation Science Standards
... understand that all objects exert a gravitational pull on each other, understand that the mass of an object and its proximity to another object will increase the strength of gravitational pull, understand the role gravity plays on Earth, understand that other planets have different gravities ...
... understand that all objects exert a gravitational pull on each other, understand that the mass of an object and its proximity to another object will increase the strength of gravitational pull, understand the role gravity plays on Earth, understand that other planets have different gravities ...
Microplasma
Microplasmas are plasmas of small dimensions, ranging from tens to thousands of micrometers. They can be generated at a variety of temperatures and pressures, existing as either thermal or non-thermal plasmas. Non-thermal microplasmas that can maintain their state at standard temperatures and pressures are readily available and accessible to scientists as they can be easily sustained and manipulated under standard conditions. Therefore, they can be employed for commercial, industrial, and medical applications, giving rise to the evolving field of microplasmas.