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WIMPs and MACHOs - Caltech Astronomy
... except by exquisitely sensitive equipment. These difficulties, however, have not stopped many groups throughout the world from developing devices capable of detecting WIMPs. The detection rates turn out to be within and just beyond the reach of current experimental efforts. The basic idea is to dete ...
... except by exquisitely sensitive equipment. These difficulties, however, have not stopped many groups throughout the world from developing devices capable of detecting WIMPs. The detection rates turn out to be within and just beyond the reach of current experimental efforts. The basic idea is to dete ...
Document
... These sources can contribute both to the population of unidentified point-like sources and to the local cosmic-ray electron spectrum. The inverse Compton emission of these locally generated cosmic rays may explain the variety of gamma-ray spectra detected from nearby molecular clouds. ...
... These sources can contribute both to the population of unidentified point-like sources and to the local cosmic-ray electron spectrum. The inverse Compton emission of these locally generated cosmic rays may explain the variety of gamma-ray spectra detected from nearby molecular clouds. ...
Document
... These sources can contribute both to the population of unidentified point-like sources and to the local cosmic-ray electron spectrum. The inverse Compton emission of these locally generated cosmic rays may explain the variety of gamma-ray spectra detected from nearby molecular clouds. ...
... These sources can contribute both to the population of unidentified point-like sources and to the local cosmic-ray electron spectrum. The inverse Compton emission of these locally generated cosmic rays may explain the variety of gamma-ray spectra detected from nearby molecular clouds. ...
CH. 7 - science1d
... group of three stars that orbit each other. This group is called the Centauri system (Figure 7.8). It lies about 4.3 ly away from the solar system. If it were possible for you to have a cellphone conversation with someone living near these stars, just saying hello to each other would require more th ...
... group of three stars that orbit each other. This group is called the Centauri system (Figure 7.8). It lies about 4.3 ly away from the solar system. If it were possible for you to have a cellphone conversation with someone living near these stars, just saying hello to each other would require more th ...
Sample pages 1 PDF
... all stellar systems in which the majority of stars are confined to a relatively thin disk. In our own Galaxy, this disk can be seen as the band of stars stretched across the night sky, which led to it being named the Milky Way. Besides such disk galaxies, there is a second major class of luminous st ...
... all stellar systems in which the majority of stars are confined to a relatively thin disk. In our own Galaxy, this disk can be seen as the band of stars stretched across the night sky, which led to it being named the Milky Way. Besides such disk galaxies, there is a second major class of luminous st ...
Chapter 26: Stars, Galaxies, and the Universe Stars
... collapse shrinks the star's core to a white, glowing object about the size of Earth. A star at this point is called a white dwarf. Eventually, a white dwarf cools down and its light fades out. Supergiants and Supernovas A star that has much more mass than the Sun will end its life in a more dramatic ...
... collapse shrinks the star's core to a white, glowing object about the size of Earth. A star at this point is called a white dwarf. Eventually, a white dwarf cools down and its light fades out. Supergiants and Supernovas A star that has much more mass than the Sun will end its life in a more dramatic ...
The XXL Survey - XIII. Baryon content of the bright cluster sample
... cases any uncertainty associated with the temperature measurement propagates very weakly to the emission measure. For the least massive systems (∼10% of the sample), the X-ray emissivity depends strongly on line emission and on the position of the bremsstrahlung cut-off. For these systems we thus ex ...
... cases any uncertainty associated with the temperature measurement propagates very weakly to the emission measure. For the least massive systems (∼10% of the sample), the X-ray emissivity depends strongly on line emission and on the position of the bremsstrahlung cut-off. For these systems we thus ex ...
Shock interactions, turbulence and the origin of the stellar mass
... the massive stars within them that heat and ionize the surrounding molecular and atomic gas through their intense radiation fields. The feedback from radiation fields produces H II regions (ionized hydrogen) [15]. Towards the end of their short lives, massive stars produce stellar winds followed by ...
... the massive stars within them that heat and ionize the surrounding molecular and atomic gas through their intense radiation fields. The feedback from radiation fields produces H II regions (ionized hydrogen) [15]. Towards the end of their short lives, massive stars produce stellar winds followed by ...
THREE INTRIGUER NEBULAE IN CONSTELLATION CARINA
... carry out my own project to study this entity in detail using a common telescope and, like with other observing projects, have an empirical description of it, thus finding out how many and which members are in the range of an 8-inch telescope, getting conclusions and saving observations for other ob ...
... carry out my own project to study this entity in detail using a common telescope and, like with other observing projects, have an empirical description of it, thus finding out how many and which members are in the range of an 8-inch telescope, getting conclusions and saving observations for other ob ...
Three-dimensional Simulation of Magnetized Cloud Fragmentation
... In the standard model of low-mass star formation, molecular clouds have an initially subcritical mass-to-flux ratio, and spend a relatively long time (∼ 107 years) undergoing quasi-static fragmentation by ambipolar diffusion until cores come to be supercritical. After a core becomes supercritical, it ...
... In the standard model of low-mass star formation, molecular clouds have an initially subcritical mass-to-flux ratio, and spend a relatively long time (∼ 107 years) undergoing quasi-static fragmentation by ambipolar diffusion until cores come to be supercritical. After a core becomes supercritical, it ...
White dwarf binaries
... better known as cataclysmic variables (CVs) and are interacting binaries in that the white dwarf is accreting material from its (usually) cool, late-type companion star in a short (of the order of hours) orbital period. They are one of the few classes of object considered in this book that were actu ...
... better known as cataclysmic variables (CVs) and are interacting binaries in that the white dwarf is accreting material from its (usually) cool, late-type companion star in a short (of the order of hours) orbital period. They are one of the few classes of object considered in this book that were actu ...
PDF only - at www.arxiv.org.
... the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different epochs, we detected the signatures of a nearly spherical stream of highly ionized gas in the broadband X-ray spectra of the luminous quasar PDS 456. This persistent wind is expell ...
... the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different epochs, we detected the signatures of a nearly spherical stream of highly ionized gas in the broadband X-ray spectra of the luminous quasar PDS 456. This persistent wind is expell ...
Word version of Episode 704
... Finding the Andromeda galaxy M31 The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It i ...
... Finding the Andromeda galaxy M31 The Andromeda galaxy M31 can just, but only just, be seen with the naked eye. Its light, 2 million years old, is the oldest light you can see with the unaided eye. The Andromeda galaxy, M31, is the nearest neighbour large galaxy to our own Galaxy, the Milky Way. It i ...
$doc.title
... of localized emission. Under this assumption of source lobecome more abundant with increasing energy, also beyond calization the spatial and spectral dependence of the diffuse the knee. Above the ankle virtually nothing is known about γ-ray and neutrino emission is then determined by the transthe co ...
... of localized emission. Under this assumption of source lobecome more abundant with increasing energy, also beyond calization the spatial and spectral dependence of the diffuse the knee. Above the ankle virtually nothing is known about γ-ray and neutrino emission is then determined by the transthe co ...
molecular cloud evolution. ii. from cloud formation to the
... postshock clouds, which are furthermore driven to produce local collapse events leading to star formation, although a large fraction of the mass in the clouds remains gravitationally unbound. However, because these simulations were isothermal, the gas had to be assumed to already be clumpy and at ve ...
... postshock clouds, which are furthermore driven to produce local collapse events leading to star formation, although a large fraction of the mass in the clouds remains gravitationally unbound. However, because these simulations were isothermal, the gas had to be assumed to already be clumpy and at ve ...
A double detached shell around a post
... limit of 3.6 kpc for this interstellar cloud, which is also a lower limit of the distance to IRAS 17163. If the Galactic rotation model is applied to the component at 5.9 km s−1 , this would give a lower limit of 17.4+1.84 −1.33 kpc to the star. This, however, is incompatible with the inferred total ...
... limit of 3.6 kpc for this interstellar cloud, which is also a lower limit of the distance to IRAS 17163. If the Galactic rotation model is applied to the component at 5.9 km s−1 , this would give a lower limit of 17.4+1.84 −1.33 kpc to the star. This, however, is incompatible with the inferred total ...
WORD - Astrophysics
... of galaxy formation and evolution in the full range of environments. Several complementary lines of attack are possible, directly connecting present-day Universe with the high redshift Universe, where the old stars near the Sun formed. Both the star formation histories of galaxies and the mass assem ...
... of galaxy formation and evolution in the full range of environments. Several complementary lines of attack are possible, directly connecting present-day Universe with the high redshift Universe, where the old stars near the Sun formed. Both the star formation histories of galaxies and the mass assem ...
Results from the search for tidal disruption flares in the GALEX Deep
... • Seyfert nucleus in it inner 0.”1 was previously masked by H II regions in ground-based spectra • The Chandra upper-limit on the nuclear X-ray luminosity is consistent with the predicted Lx from L(H) for LLAGNs, of ~ 9 x 1038 ergs s-1. ...
... • Seyfert nucleus in it inner 0.”1 was previously masked by H II regions in ground-based spectra • The Chandra upper-limit on the nuclear X-ray luminosity is consistent with the predicted Lx from L(H) for LLAGNs, of ~ 9 x 1038 ergs s-1. ...
mg_colloq - University of Massachusetts Amherst
... number of cETG depends on 1) the rate at which compact star forming galaxies appear and 2) the rate at which they become passive (quenched) ...
... number of cETG depends on 1) the rate at which compact star forming galaxies appear and 2) the rate at which they become passive (quenched) ...
Large-eddy simulations of isolated disc galaxies with thermal and
... We present a subgrid-scale model for the Multi-phase Interstellar medium, Star formation, and Turbulence (MIST) and explore its behaviour in high-resolution large-eddy simulations of isolated disc galaxies. MIST follows the evolution of a clumpy cold and a diffuse warm component of the gas within a ...
... We present a subgrid-scale model for the Multi-phase Interstellar medium, Star formation, and Turbulence (MIST) and explore its behaviour in high-resolution large-eddy simulations of isolated disc galaxies. MIST follows the evolution of a clumpy cold and a diffuse warm component of the gas within a ...
The HIRES science case
... These unexpected discoveries have sparked a flurry of theoretical activities aimed at understanding the growth of planets, their interactions with the gaseous disc in which they are embedded and with other growing bodies. While the quest to find solar system analogues is still on going, the first sp ...
... These unexpected discoveries have sparked a flurry of theoretical activities aimed at understanding the growth of planets, their interactions with the gaseous disc in which they are embedded and with other growing bodies. While the quest to find solar system analogues is still on going, the first sp ...
Exoplanets - Polarisation.eu
... • These measurements have not yet been confirmed by other polarimeters. • To fit the data, this exoplanet should have a very high degree of polarization. • The model calculations include no multiple scattering of light. ...
... • These measurements have not yet been confirmed by other polarimeters. • To fit the data, this exoplanet should have a very high degree of polarization. • The model calculations include no multiple scattering of light. ...
01_test_bank
... C) Nearly every atom from which we are made once (before the solar system formed) was inside of a star. D) Nearly every atom from which we are made was once inside our star, the Sun. E) Sagan thought that all of us have the potential to be movie (or TV) stars like he was. Answer: C 13) Which of the ...
... C) Nearly every atom from which we are made once (before the solar system formed) was inside of a star. D) Nearly every atom from which we are made was once inside our star, the Sun. E) Sagan thought that all of us have the potential to be movie (or TV) stars like he was. Answer: C 13) Which of the ...
General Astrophysics And Comparative Planetology
... light. Visible-light measurements of planet flux provide a combination of planetary albedo and area. Mid-infrared measurements of planet flux provide a combination of planetary temperature (from thermal emission) and area. Combining visible and mid-IR measurements breaks the degeneracy in a single-b ...
... light. Visible-light measurements of planet flux provide a combination of planetary albedo and area. Mid-infrared measurements of planet flux provide a combination of planetary temperature (from thermal emission) and area. Combining visible and mid-IR measurements breaks the degeneracy in a single-b ...