VLT/FORS Surveys of Wolf-Rayet Stars beyond the
... interiors. It is only within the past decade that allowance for both effects have been considered within evolutionary models, most recently implemented into spectral synthesis models (Vazquez et al. 2007). ...
... interiors. It is only within the past decade that allowance for both effects have been considered within evolutionary models, most recently implemented into spectral synthesis models (Vazquez et al. 2007). ...
Presentazione di PowerPoint
... minimal), with a component due to the combined gravitational potential of stars, dust, gas, dark matter, and anything else contributing mass to within that region. Beyond the sphere of influence, the gravitational dominance of the SMBH quickly vanishes. ...
... minimal), with a component due to the combined gravitational potential of stars, dust, gas, dark matter, and anything else contributing mass to within that region. Beyond the sphere of influence, the gravitational dominance of the SMBH quickly vanishes. ...
2 Galaxy morphology and classification
... Dwarf spheroidal (dSph) - Low-luminosity very di↵use spheroidal systems of stars The Andromeda galaxy (M31) has three dE companions (NGC 147, 185 and 205 see Figure ...
... Dwarf spheroidal (dSph) - Low-luminosity very di↵use spheroidal systems of stars The Andromeda galaxy (M31) has three dE companions (NGC 147, 185 and 205 see Figure ...
Disks around low-mass stars in extreme environments
... comes from winds of evolved stars, or supernovae (M✶ ≤ 30 M⊙) ...
... comes from winds of evolved stars, or supernovae (M✶ ≤ 30 M⊙) ...
Stars change over their life cycles.
... Like our Sun, all stars are huge balls of glowing gas that produce or have produced energy by fusion. However, stars differ in size, brightness, and temperature. Some stars are smaller, fainter, and cooler than the Sun. Others are much bigger, brighter, and hotter. Stars look like small points of li ...
... Like our Sun, all stars are huge balls of glowing gas that produce or have produced energy by fusion. However, stars differ in size, brightness, and temperature. Some stars are smaller, fainter, and cooler than the Sun. Others are much bigger, brighter, and hotter. Stars look like small points of li ...
Manual - TUM
... The quickest part of this project is likely to be taking the images of the stellar clusters. Planning the observations including target selection and scheduling, planning the calibration frames and analysing the data are each likely to take longer. Therefore it is vital to plan your observations, as ...
... The quickest part of this project is likely to be taking the images of the stellar clusters. Planning the observations including target selection and scheduling, planning the calibration frames and analysing the data are each likely to take longer. Therefore it is vital to plan your observations, as ...
P1a_Revision_lesson
... Light from other galaxies has a longer _________ than expected. This shows that these galaxies are moving ____ from us very quickly. This effect is seen to a greater extent in galaxies that are _______ away from us. This indicates that the further away the galaxy is, the ______ it is moving. This ev ...
... Light from other galaxies has a longer _________ than expected. This shows that these galaxies are moving ____ from us very quickly. This effect is seen to a greater extent in galaxies that are _______ away from us. This indicates that the further away the galaxy is, the ______ it is moving. This ev ...
Answers
... pattern D. It forms this pattern because the larger radii will contain more stars. This is similar to the gravitational field strength within the Earth. 5) What could this unseen matter be? Small cold objects like planets, asteroids, brown dwarfs. Tiny particles like dust or gas. Black holes. Neutri ...
... pattern D. It forms this pattern because the larger radii will contain more stars. This is similar to the gravitational field strength within the Earth. 5) What could this unseen matter be? Small cold objects like planets, asteroids, brown dwarfs. Tiny particles like dust or gas. Black holes. Neutri ...
TOOLS IN ASTRONOMY SPECTROSCOPY
... Introduction: Classifying stars based on brightness is somewhat problematic. A star’s apparent brightness can be affected by its distance from the observer, its size, or by the presence of interstellar dust. Instead, astronomers classify stars based on the major components of their spectra. Much lik ...
... Introduction: Classifying stars based on brightness is somewhat problematic. A star’s apparent brightness can be affected by its distance from the observer, its size, or by the presence of interstellar dust. Instead, astronomers classify stars based on the major components of their spectra. Much lik ...
SHADES paper VII (b)
... and the probability that a galaxy at z will act as a lens • Differences due to cosmology are much bigger than differences due to lens model uncertainty • Plot shows normalized p(zL) but in principle the absolutes give even stronger constraints on cosmology ...
... and the probability that a galaxy at z will act as a lens • Differences due to cosmology are much bigger than differences due to lens model uncertainty • Plot shows normalized p(zL) but in principle the absolutes give even stronger constraints on cosmology ...
harvest09b - NMSU Astronomy
... Generate “observed” spectra, analyze as an observer, quantitatively compare ...
... Generate “observed” spectra, analyze as an observer, quantitatively compare ...
Cosmic Collisions ( 12 MB)
... Hot gas detected by Chandra in X-rays is seen as two pink clumps in the image and contains most of the "normal," or baryonic, matter in the two clusters. The bullet-shaped clump on the right is the hot gas from one cluster, which passed through the hot gas from the other larger cluster during the co ...
... Hot gas detected by Chandra in X-rays is seen as two pink clumps in the image and contains most of the "normal," or baryonic, matter in the two clusters. The bullet-shaped clump on the right is the hot gas from one cluster, which passed through the hot gas from the other larger cluster during the co ...
The Naked Eye Stars as Data Supporting Galileo`s
... Galileo believed that with his telescope he could see the physical globes of stars and accurately measure their angular diameters (α). ...
... Galileo believed that with his telescope he could see the physical globes of stars and accurately measure their angular diameters (α). ...
MEASURING ANGLES
... Go outside and look at the night sky and try to find the constellations below (look towards the Southwest, all the way up to the Zenith). You’ll see Deneb and Vega above you (Vega in you Zenith), and Altair a little further South. These are the three brightest stars in the summer sky and are often r ...
... Go outside and look at the night sky and try to find the constellations below (look towards the Southwest, all the way up to the Zenith). You’ll see Deneb and Vega above you (Vega in you Zenith), and Altair a little further South. These are the three brightest stars in the summer sky and are often r ...
Lecture 8
... Objects of the former kind have been dubbed MACHOs (Massive Astrophysical Compact Halo Objects) to contrast them with another dark matter candidate, WIMPs, to be discussed later. A way to detect such a dark compact object is gravitational microlensing: If such a massive object passes near the line o ...
... Objects of the former kind have been dubbed MACHOs (Massive Astrophysical Compact Halo Objects) to contrast them with another dark matter candidate, WIMPs, to be discussed later. A way to detect such a dark compact object is gravitational microlensing: If such a massive object passes near the line o ...
1 Distance: A History of Parallax and Brief Introduction to Standard
... Thales believed that the Earth was disk-shaped and floated in a cosmic ocean; however, Anaximander took the leap and imagined the disk-shaped [Hirshfled 4] (or cylinder-shaped [Hoskin 29]) Earth floated not in an ocean, but space [Hirshfeld 4]. Pythagoras imaged a globe-shaped Earth. Aristotle also ...
... Thales believed that the Earth was disk-shaped and floated in a cosmic ocean; however, Anaximander took the leap and imagined the disk-shaped [Hirshfled 4] (or cylinder-shaped [Hoskin 29]) Earth floated not in an ocean, but space [Hirshfeld 4]. Pythagoras imaged a globe-shaped Earth. Aristotle also ...
A third red supergiant rich cluster in the Scutum
... physical association of RSGs, in order to discriminate between cluster and field stars (e.g. D07). However, the spectroscopic data presented here are of insufficient resolution to extract the radial velocity of cluster members, while, unlike RSGC1 and 2 (F06; D07), we find no maser emission from any c ...
... physical association of RSGs, in order to discriminate between cluster and field stars (e.g. D07). However, the spectroscopic data presented here are of insufficient resolution to extract the radial velocity of cluster members, while, unlike RSGC1 and 2 (F06; D07), we find no maser emission from any c ...
The formation of the galaxy is believed to be similar
... can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars en ...
... can be divided into 2 phases: a spherical gas cloud (halo) collapsed to form the stars in the Milky Way's spheroid, then rapidly rotating gas collapsed into a disk-shaped configuration of stars. Since disk stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars en ...
File
... All stars begin their lives as parts of nebulas. ______________ can pull some of the gas and dust in a nebula together. The contracting cloud is then called a _________________________. Proto means _______________ stage of a star’s life. A star is born when the contracting gas and dust bec ...
... All stars begin their lives as parts of nebulas. ______________ can pull some of the gas and dust in a nebula together. The contracting cloud is then called a _________________________. Proto means _______________ stage of a star’s life. A star is born when the contracting gas and dust bec ...
Globular cluster absolute ages from cooling brown dwarfs
... a suite of models (Paxton et al. 2011) for different initial masses and the metal content of the globular cluster 47 Tucanae. The specifications of our models are explained in Appendix A. From the models, we can see that in the early stages of their evolution, BDs evolve exactly like pre-main sequen ...
... a suite of models (Paxton et al. 2011) for different initial masses and the metal content of the globular cluster 47 Tucanae. The specifications of our models are explained in Appendix A. From the models, we can see that in the early stages of their evolution, BDs evolve exactly like pre-main sequen ...
Edwin Hubble (1889
... been formulated." The way Hubble discovered to classify nebulae is described here. After serving in World War I, Hubble joined the Mount Wilson Observatory staff. There he took photographs of nebulae with the new 100-inch reflector, the most powerful telescope in the world. Hubble discovered variabl ...
... been formulated." The way Hubble discovered to classify nebulae is described here. After serving in World War I, Hubble joined the Mount Wilson Observatory staff. There he took photographs of nebulae with the new 100-inch reflector, the most powerful telescope in the world. Hubble discovered variabl ...
Through Hubble`s Eye - Arizona State University
... may exist there is so young that it comes from a time when the universe was not much more than a warm bath of neutral hydrogen gas. The first few stars and galaxies formed in this period are concealed from us today by this gas. The stars and galaxies we do see are visible because the gas between the ...
... may exist there is so young that it comes from a time when the universe was not much more than a warm bath of neutral hydrogen gas. The first few stars and galaxies formed in this period are concealed from us today by this gas. The stars and galaxies we do see are visible because the gas between the ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.