Part1
... Goal: Briefly survey the components of galaxies, how these are observed, how they relate to one another, and how mm and IR observations fit into the picture. Gloss over: nuclei (S.G-B.), detailed phase balance (C.K.), B. Fields (C.T.) ...
... Goal: Briefly survey the components of galaxies, how these are observed, how they relate to one another, and how mm and IR observations fit into the picture. Gloss over: nuclei (S.G-B.), detailed phase balance (C.K.), B. Fields (C.T.) ...
Two distinct sequences of blue straggler stars in the globular cluster
... Creek ACT 2611, Australia Stars in globular clusters are generally believed to have all formed at the same time, early in the Galaxy's history1. 'Blue stragglers' are stars sufficiently massive2 that they should have evolved into white dwarfs long ago. Two possible mechanisms have been proposed for ...
... Creek ACT 2611, Australia Stars in globular clusters are generally believed to have all formed at the same time, early in the Galaxy's history1. 'Blue stragglers' are stars sufficiently massive2 that they should have evolved into white dwarfs long ago. Two possible mechanisms have been proposed for ...
Star Clusters - Caltech Astronomy
... near one solar mass. The most populous younger clusters contain a few thousand stars, but since their most massive stars are substantially more massive than the Sun, the total mass of some of the younger clusters exceeds 104 M . Few if any open clusters have enough members to be characterized in te ...
... near one solar mass. The most populous younger clusters contain a few thousand stars, but since their most massive stars are substantially more massive than the Sun, the total mass of some of the younger clusters exceeds 104 M . Few if any open clusters have enough members to be characterized in te ...
1 Introduction - Wiley-VCH
... Spitzer space mission, is relatively smooth. Old stars are the dominant stellar population in the companion NGC 5195, an early-type galaxy interacting with NGC 5194. The distribution of the young stellar component, as traced by the H α narrow band (ground-based observation) and UV GALEX images, is v ...
... Spitzer space mission, is relatively smooth. Old stars are the dominant stellar population in the companion NGC 5195, an early-type galaxy interacting with NGC 5194. The distribution of the young stellar component, as traced by the H α narrow band (ground-based observation) and UV GALEX images, is v ...
Discovery of new bright quasars by the core
... We have undertaken a program of search and discovery of all bright AGN in the region with δ > 0◦ and |b| > 20◦ using the MAPS calatog for a pre-selection, DSS2 (Lasker et al. 1998) bri images for estimation of the core - host galaxy ratio and the surface brightness distribution of objects, and the D ...
... We have undertaken a program of search and discovery of all bright AGN in the region with δ > 0◦ and |b| > 20◦ using the MAPS calatog for a pre-selection, DSS2 (Lasker et al. 1998) bri images for estimation of the core - host galaxy ratio and the surface brightness distribution of objects, and the D ...
Power Point
... no pattern between age and luminosity / mass • reason for difference: - my sample over small magnitude range (~2 mag) for bright galaxies (magnitude limited sample) - size of my errors smear out any correlation - there may not be any correlation ...
... no pattern between age and luminosity / mass • reason for difference: - my sample over small magnitude range (~2 mag) for bright galaxies (magnitude limited sample) - size of my errors smear out any correlation - there may not be any correlation ...
8-4.9 - S2TEM Centers SC
... o irregular – no definite shape Because distances in space are so great that conventional numbers are too large to work with, astronomers use a unit of measurement called light year to measure the distance to stars and galaxies in space. The distance in one light year is equal to the distance ligh ...
... o irregular – no definite shape Because distances in space are so great that conventional numbers are too large to work with, astronomers use a unit of measurement called light year to measure the distance to stars and galaxies in space. The distance in one light year is equal to the distance ligh ...
PowerPoint Presentation - 16. Properties of Stars
... • A star’s most important property is its mass, which determines its luminosity and spectral type at each stage of its life. • What are the three major classes of binary star systems? • A visual binary is a pair of orbiting stars that we can see distinctly. An eclipsing binary reveals its binary nat ...
... • A star’s most important property is its mass, which determines its luminosity and spectral type at each stage of its life. • What are the three major classes of binary star systems? • A visual binary is a pair of orbiting stars that we can see distinctly. An eclipsing binary reveals its binary nat ...
First DENIS I-band extragalactic catalog
... First DENIS I-band extragalactic catalog?,?? I. Vauglin1 , G. Paturel1 , J. Borsenberger2, P. Fouqué3,4 , N. Epchtein3,5 , S. Kimeswenger6, D. Tiphène3 , P. Lanoix1 , and H. Courtois1 ...
... First DENIS I-band extragalactic catalog?,?? I. Vauglin1 , G. Paturel1 , J. Borsenberger2, P. Fouqué3,4 , N. Epchtein3,5 , S. Kimeswenger6, D. Tiphène3 , P. Lanoix1 , and H. Courtois1 ...
The Hα Balmer line as an effective temperature criterion
... star but rather a thick disk star) with [Fe/H] = −0.7. The model atmosphere of a real halo star, with a metallicity in the range from −1.5 to −3., has drastic structural differences in continuous opacity and blanketing effect with respect to the stars of our calibration. We cannot expect Eq. (4) to ap ...
... star but rather a thick disk star) with [Fe/H] = −0.7. The model atmosphere of a real halo star, with a metallicity in the range from −1.5 to −3., has drastic structural differences in continuous opacity and blanketing effect with respect to the stars of our calibration. We cannot expect Eq. (4) to ap ...
Cosmological Applications of Gravitational Lensing
... Findings: • M/L 100 solar units • core radius < 100 kpc (smaller than their images) • Abell 370 appears to have elliptical mass distribution ...
... Findings: • M/L 100 solar units • core radius < 100 kpc (smaller than their images) • Abell 370 appears to have elliptical mass distribution ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... Ordinary matter makes up only 4.6 percent of the cosmic density; only 0.5 percent is visible. Nearly five times that much—23 percent—of the universe is made of invisible, transparent “dark matter,” whose existence is felt through its gravitational influence. It is now known that every galaxy, includ ...
... Ordinary matter makes up only 4.6 percent of the cosmic density; only 0.5 percent is visible. Nearly five times that much—23 percent—of the universe is made of invisible, transparent “dark matter,” whose existence is felt through its gravitational influence. It is now known that every galaxy, includ ...
SRMP Stars Curriculum - American Museum of Natural History
... Turn the dimmable light on low, and turn off the classroom lights. Ask students to view the light through the diffraction gratings, and ask what colors they see. Ask them to point out the brightest color in the spectrum. Reds and oranges should predominate if the light is low enough, and a reddish/o ...
... Turn the dimmable light on low, and turn off the classroom lights. Ask students to view the light through the diffraction gratings, and ask what colors they see. Ask them to point out the brightest color in the spectrum. Reds and oranges should predominate if the light is low enough, and a reddish/o ...
Chapter 1 The Discovery of Open Clusters - Willmann-Bell
... the massive Devil’s Tower rock formation in Wyoming was created by the Great Spirit to protect seven Indian maidens who were being pursued by bears. The maidens were subsequently placed in the sky as the Pleiades cluster. These stars were also important in the world system of the peoples of Mexico a ...
... the massive Devil’s Tower rock formation in Wyoming was created by the Great Spirit to protect seven Indian maidens who were being pursued by bears. The maidens were subsequently placed in the sky as the Pleiades cluster. These stars were also important in the world system of the peoples of Mexico a ...
hr diagrams of star clusters
... your cluster HR diagram. Once you have matched the zero-age main-sequence, you can then call up the isochrone-fitting tool. On the menu bar of the ColorMagnitude diagram window, call up Tools > Isochrones, and you will see an isochrone plotted on your HR diagram near the plot of your cluster stars. ...
... your cluster HR diagram. Once you have matched the zero-age main-sequence, you can then call up the isochrone-fitting tool. On the menu bar of the ColorMagnitude diagram window, call up Tools > Isochrones, and you will see an isochrone plotted on your HR diagram near the plot of your cluster stars. ...
HR DIAGRAMS OF STAR CLUSTERS
... your cluster HR diagram. Once you have matched the zero-age main-sequence, you can then call up the isochrone-fitting tool. On the menu bar of the ColorMagnitude diagram window, call up Tools > Isochrones, and you will see an isochrone plotted on your HR diagram near the plot of your cluster stars. ...
... your cluster HR diagram. Once you have matched the zero-age main-sequence, you can then call up the isochrone-fitting tool. On the menu bar of the ColorMagnitude diagram window, call up Tools > Isochrones, and you will see an isochrone plotted on your HR diagram near the plot of your cluster stars. ...
THE PERIOD OF ROTATION OF THE SUN
... your cluster HR diagram. Once you have matched the zero-age main-sequence, you can then call up the isochrone-fitting tool. On the menu bar of the ColorMagnitude diagram window, call up Tools > Isochrones, and you will see an isochrone plotted on your HR diagram near the plot of your cluster stars. ...
... your cluster HR diagram. Once you have matched the zero-age main-sequence, you can then call up the isochrone-fitting tool. On the menu bar of the ColorMagnitude diagram window, call up Tools > Isochrones, and you will see an isochrone plotted on your HR diagram near the plot of your cluster stars. ...
ppt - A century of cosmology
... candidate faint Ly emitters at z~8-10 with SFR <1 M yr-1 - a population which may contribute significantly to reionization. • Exhaustive spectroscopic and imaging follow-up supports hypothesis that many of lensed Lya emitters are at z~10 but additional follow-up still required. Final confirmation ...
... candidate faint Ly emitters at z~8-10 with SFR <1 M yr-1 - a population which may contribute significantly to reionization. • Exhaustive spectroscopic and imaging follow-up supports hypothesis that many of lensed Lya emitters are at z~10 but additional follow-up still required. Final confirmation ...
7. Paradise Gravity
... Absolute gravity is a long-range interaction between individual ultimatons and the Isle of Paradise, which has “a potential infinity of gravity extension.” 11:8.9 Unlike other later forms of materialization evolved from cosmic force, ultimatons do not gravitationally interact with other ultimatons ...
... Absolute gravity is a long-range interaction between individual ultimatons and the Isle of Paradise, which has “a potential infinity of gravity extension.” 11:8.9 Unlike other later forms of materialization evolved from cosmic force, ultimatons do not gravitationally interact with other ultimatons ...
The San Diego Astronomy Association`s Annual Banquet
... life at UCLA or Cal State, Los Angeles. He can also be found performing planetarium presentations at LA’s landmark Griffith Observatory. Dr. Grazier also works in Hollywood. He has been featured in several documentaries, and currently serves as the scientific advisor for the PBS animated series The ...
... life at UCLA or Cal State, Los Angeles. He can also be found performing planetarium presentations at LA’s landmark Griffith Observatory. Dr. Grazier also works in Hollywood. He has been featured in several documentaries, and currently serves as the scientific advisor for the PBS animated series The ...
ASPEN WORKSHOP 2003
... ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above 0.35 for about 700 Myears, but NOT for face-on HDF application: rest frame B morphol ...
... ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above 0.35 for about 700 Myears, but NOT for face-on HDF application: rest frame B morphol ...
The age structure of the Milky Way`s halo
... consumption of all of the available gas, or the expulsion of gas by massive-star supernova explosions, after only a limited amount of star formation has taken place (other quenching mechanisms include tidal stripping and reionization). This quenching likely occurred before these clumps merged with t ...
... consumption of all of the available gas, or the expulsion of gas by massive-star supernova explosions, after only a limited amount of star formation has taken place (other quenching mechanisms include tidal stripping and reionization). This quenching likely occurred before these clumps merged with t ...
English Summary
... 000 000 000 kilometers from Earth, which is actually quite near. Most of these galaxies contain the nearest and also lowest luminosity AGN that can be studied. In order to detect even weak signatures of black hole activity, we have used telescopes that detect X-ray and radio waves. At these waveleng ...
... 000 000 000 kilometers from Earth, which is actually quite near. Most of these galaxies contain the nearest and also lowest luminosity AGN that can be studied. In order to detect even weak signatures of black hole activity, we have used telescopes that detect X-ray and radio waves. At these waveleng ...
script
... into the universe of galaxies beyond. As we journey outward to distant galaxies we discover a surprising fact: the distant galaxies look much different than the galaxies closer to our Milky Way. Why is this? As it turns out, the light from these distant galaxies takes a much longer time to reach us ...
... into the universe of galaxies beyond. As we journey outward to distant galaxies we discover a surprising fact: the distant galaxies look much different than the galaxies closer to our Milky Way. Why is this? As it turns out, the light from these distant galaxies takes a much longer time to reach us ...
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.