Starspots: A Key to the Stellar Dynamo | SpringerLink
... by cyclonic turbulence in the outer convection zone and penetrate the solar atmosphere forming sunspots, plages, network, etc. They further expand into the outer atmosphere and exhibit themselves as highly dynamic coronal loops. Thus, a detailed study of solar activity phenomena reveals the structur ...
... by cyclonic turbulence in the outer convection zone and penetrate the solar atmosphere forming sunspots, plages, network, etc. They further expand into the outer atmosphere and exhibit themselves as highly dynamic coronal loops. Thus, a detailed study of solar activity phenomena reveals the structur ...
Differential rotation on both components of the pre-main
... fields up to several kG from observations of very slowly rotating and weakly magnetized Ap stars (see Donati & Collier Cameron 1997). No assumption is made about the underlying photospheric temperature. The individual weights (w) assigned to each spectral line in the creation of the combined LSD pro ...
... fields up to several kG from observations of very slowly rotating and weakly magnetized Ap stars (see Donati & Collier Cameron 1997). No assumption is made about the underlying photospheric temperature. The individual weights (w) assigned to each spectral line in the creation of the combined LSD pro ...
Science with the Constellation
... determine black hole spin, which Constellation-X should be able to do for a large sample of AGN (Reynolds and Begelman, 1997). What is the total energy output of the Universe? Until recently, less attention has been given to sources of energy in the Universe that are not directly visible at optical- ...
... determine black hole spin, which Constellation-X should be able to do for a large sample of AGN (Reynolds and Begelman, 1997). What is the total energy output of the Universe? Until recently, less attention has been given to sources of energy in the Universe that are not directly visible at optical- ...
Stars sensors terminology and performance
... This Standard specifies star tracker performances as part of a space project. The Standard covers all aspects of performances, including nomenclature, definitions, and performance requirements for the performance specification of star sensors. The Standard focuses on performance specifications (incl ...
... This Standard specifies star tracker performances as part of a space project. The Standard covers all aspects of performances, including nomenclature, definitions, and performance requirements for the performance specification of star sensors. The Standard focuses on performance specifications (incl ...
lecture course
... somewhat less secure than for stars. This is in part due to the extreme conditions near these very massive black holes of 106 to 109 solar masses, which is quite unlike anything we can test in laboratories on Earth (we are in the strong field limit of general relativity). On the other hand, atomic s ...
... somewhat less secure than for stars. This is in part due to the extreme conditions near these very massive black holes of 106 to 109 solar masses, which is quite unlike anything we can test in laboratories on Earth (we are in the strong field limit of general relativity). On the other hand, atomic s ...
Type Ia Supernovae
... deduced from his observations of the famous supernova in 1572, that the stars, in contrast to the widely believe Aristotelian doctrine, were not immutable. More than 400 years after Tycho made his paradigm changing discovery using SN 1572, and some 60 years after supernovae had been identified as di ...
... deduced from his observations of the famous supernova in 1572, that the stars, in contrast to the widely believe Aristotelian doctrine, were not immutable. More than 400 years after Tycho made his paradigm changing discovery using SN 1572, and some 60 years after supernovae had been identified as di ...
DUSTiNGS III: Distribution of Intermediate
... et al. 2015c, hereafter Paper II). Twelve of these x-AGB star candidates are in galaxies with [Fe/H]< −2.0, making them the most metal-poor dust-producing AGB stars known. Less dusty AGB stars have typical amplitudes too small to be detected given the sensitivity limit of DUSTiNGS and, therefore, ar ...
... et al. 2015c, hereafter Paper II). Twelve of these x-AGB star candidates are in galaxies with [Fe/H]< −2.0, making them the most metal-poor dust-producing AGB stars known. Less dusty AGB stars have typical amplitudes too small to be detected given the sensitivity limit of DUSTiNGS and, therefore, ar ...
A catalogue of the Chandra Deep Field South with multi
... MIDAS package. A WFI image processing pipeline was developed by Wolf et al. (2001) and makes intensive use of programmes developed by K. Meisenheimer, H.-J. Röser and H. Hippelein for the Calar Alto Deep Imaging Survey (CADIS). The pipeline performes basic image reduction and standard operations of ...
... MIDAS package. A WFI image processing pipeline was developed by Wolf et al. (2001) and makes intensive use of programmes developed by K. Meisenheimer, H.-J. Röser and H. Hippelein for the Calar Alto Deep Imaging Survey (CADIS). The pipeline performes basic image reduction and standard operations of ...
Stars: Stellar Evol & “death” Galaxies Astronomy 1 — Elementary Astronomy
... C. It would be unable to locate the black hole because it’s, well, black. D. It would be repelled by the black hole. Astronomy 1 - Elementary Astronomy ...
... C. It would be unable to locate the black hole because it’s, well, black. D. It would be repelled by the black hole. Astronomy 1 - Elementary Astronomy ...
Astronomy 113 Laboratory Manual - UW
... It was Polaris that guided sailors around the globe, and not only by showing the way North. Using a sextant a European captain sailing to the New World could also accurately find the ship's latitude on any clear night by observing Polaris. While it is seldom still needed today, Polaris remains ever ...
... It was Polaris that guided sailors around the globe, and not only by showing the way North. Using a sextant a European captain sailing to the New World could also accurately find the ship's latitude on any clear night by observing Polaris. While it is seldom still needed today, Polaris remains ever ...
Galaxy Evolution
... times brighter than stars like the Sun, their total luminosity will approximately equal that of 2 × 1010 of these. Thus, during the star formation activity the galaxy increases its luminosity by ∼ 20%. Its colors also become bluer, because the radiation emitted by massive stars is very rich of light ...
... times brighter than stars like the Sun, their total luminosity will approximately equal that of 2 × 1010 of these. Thus, during the star formation activity the galaxy increases its luminosity by ∼ 20%. Its colors also become bluer, because the radiation emitted by massive stars is very rich of light ...
Physical Properties of the Gas and Dust in the Orion B Molecular
... Table 1 summarizes our current knowledge about the global properties of GMCs in the solar neighborhood and their observed substructures. Note that especially the definition of a clump is highly uncertain and that such clumps are observed over a wide range of sizes and masses. With the exception of s ...
... Table 1 summarizes our current knowledge about the global properties of GMCs in the solar neighborhood and their observed substructures. Note that especially the definition of a clump is highly uncertain and that such clumps are observed over a wide range of sizes and masses. With the exception of s ...
azu_etd_13224_sip1_m
... I NTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
... I NTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Untitled - NMSU Astronomy
... from the Earth to the Moon is 384,000,000 meters or 384,000 kilometers (km). The distances found in astronomy are usually so large that we have to switch to a unit of measurement that is much larger than the meter, or even the kilometer. In and around the solar system, astronomers use “Astronomical ...
... from the Earth to the Moon is 384,000,000 meters or 384,000 kilometers (km). The distances found in astronomy are usually so large that we have to switch to a unit of measurement that is much larger than the meter, or even the kilometer. In and around the solar system, astronomers use “Astronomical ...
the stebbins galaxy: the origins of interstellar medium studies
... The discovery that the Sun is nowhere near the center of our Milky Way galaxy constitutes one of the most significant insights of 20th-century astronomy. It is one among several fundamental facts that define what we now mean by the very word ―galaxy,‖ a term whose modern meaning only began to emerge ...
... The discovery that the Sun is nowhere near the center of our Milky Way galaxy constitutes one of the most significant insights of 20th-century astronomy. It is one among several fundamental facts that define what we now mean by the very word ―galaxy,‖ a term whose modern meaning only began to emerge ...
N-Body/SPH simulations of induced star formation in dwarf galaxies
... Structure in the universe is believed to originate hierarchically. Primarily, small density perturbations arise. Pressureless dark matter clumps together in these density perturbations and dark matter halos are formed. After the decoupling of baryonic matter and radiation, baryons fall into the grav ...
... Structure in the universe is believed to originate hierarchically. Primarily, small density perturbations arise. Pressureless dark matter clumps together in these density perturbations and dark matter halos are formed. After the decoupling of baryonic matter and radiation, baryons fall into the grav ...
Astronomy Astrophysics - Niels Bohr Institutet
... effort has been devoted to the fundamental issue of determining reliable isochrone ages for as many stars as possible, and we believe that a rather more realistic assessment of the errors of such ages has been obtained. Finally, we have computed individual Galactic orbits for all stars with adequate ...
... effort has been devoted to the fundamental issue of determining reliable isochrone ages for as many stars as possible, and we believe that a rather more realistic assessment of the errors of such ages has been obtained. Finally, we have computed individual Galactic orbits for all stars with adequate ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.