Elliptical Galaxies
... of any of the spectacular structures found in SPIRAL GALAXIES. They have no disk, no spiral structure and only small amounts of the gas and dust. As a result there are no obvious symptoms of continuing star formation: no H II regions or young star clusters. They are the simplest galactic systems com ...
... of any of the spectacular structures found in SPIRAL GALAXIES. They have no disk, no spiral structure and only small amounts of the gas and dust. As a result there are no obvious symptoms of continuing star formation: no H II regions or young star clusters. They are the simplest galactic systems com ...
GG_CERN_0707
... Main sequence luminosity functions of UMi dSph and of globular clusters are indistinguishable. normal stellar M/L HST star counts Wyse et al 2002 ...
... Main sequence luminosity functions of UMi dSph and of globular clusters are indistinguishable. normal stellar M/L HST star counts Wyse et al 2002 ...
Lecture 12: Evolution of the Galaxy
... • New stars which form therefore have higher values of heavy element mass fraction, Z, at the time of their birth. The youngest stars are therefore the most heavy-element rich, and the oldest ones (Population II stars) are the most deficient in heavy elements relative to the Sun. • Halo Population I ...
... • New stars which form therefore have higher values of heavy element mass fraction, Z, at the time of their birth. The youngest stars are therefore the most heavy-element rich, and the oldest ones (Population II stars) are the most deficient in heavy elements relative to the Sun. • Halo Population I ...
Chapter 10 Formation and evolution of the Local Group
... Summary: The Local Group (LG) is the group of galaxies gravitationally associated with the Galaxy and M 31. Galaxies within the LG have overcome the general expansion of the universe. There are approximately 75 galaxies in the LG within a diameter of ∼3 Mpc having a total mass of 2-5 × 1012 M⊙ . A s ...
... Summary: The Local Group (LG) is the group of galaxies gravitationally associated with the Galaxy and M 31. Galaxies within the LG have overcome the general expansion of the universe. There are approximately 75 galaxies in the LG within a diameter of ∼3 Mpc having a total mass of 2-5 × 1012 M⊙ . A s ...
Ecosystems, from life, to the Earth, to the Galaxy
... entirely physical processes. We discuss how four systems, each operating on very different spatial and temporal scales, each exhibit these features of an ecosystem. These are, in order of increasing magnitude, the cell, the forest, the Earth and the Galaxy. In particular, we discuss how the process ...
... entirely physical processes. We discuss how four systems, each operating on very different spatial and temporal scales, each exhibit these features of an ecosystem. These are, in order of increasing magnitude, the cell, the forest, the Earth and the Galaxy. In particular, we discuss how the process ...
Document
... how much the starlight has been reddened: Blue light gets scattered and absorbed more easily than red light, so the star’s color becomes redder than it should be for a star of a ...
... how much the starlight has been reddened: Blue light gets scattered and absorbed more easily than red light, so the star’s color becomes redder than it should be for a star of a ...
Local group
... Andromeda), a smaller spiral M33 and lots of (>35 galaxies), most of which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 • The gravitational interaction between these systems is complex but the local group is apparently bound. • Major advantages – close an ...
... Andromeda), a smaller spiral M33 and lots of (>35 galaxies), most of which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 • The gravitational interaction between these systems is complex but the local group is apparently bound. • Major advantages – close an ...
Summary Of the Structure of the Milky Way
... • The Distribution of stars can reveal part of the disk-like nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allo ...
... • The Distribution of stars can reveal part of the disk-like nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allo ...
ANTARES - National Optical Astronomy Observatory
... black holes, including accretion mechanisms and jet formation (e.g., Metzger et al., 2012). With the number of TDEs detected so far only in the tens of objects, there are still many mysteries yet to be solved. For example, there is an apparent preference for these events in post-starburst galaxies ( ...
... black holes, including accretion mechanisms and jet formation (e.g., Metzger et al., 2012). With the number of TDEs detected so far only in the tens of objects, there are still many mysteries yet to be solved. For example, there is an apparent preference for these events in post-starburst galaxies ( ...
Living Things - Fairfield-Suisun Unified School District
... What is the big bang theory? How did the solar system form? What do astronomers predict about the future of the universe? ...
... What is the big bang theory? How did the solar system form? What do astronomers predict about the future of the universe? ...
chap8 (WP)
... Now, it is incorrect to assume that H is a constant, but the results of Example 8.4 are not far off. Correcting for the change in H over time, we find that the age of the universe is approximately (2/3)H -1 , rather than just H -1 . So, based on the observed value of the Hubble parameter, we predict ...
... Now, it is incorrect to assume that H is a constant, but the results of Example 8.4 are not far off. Correcting for the change in H over time, we find that the age of the universe is approximately (2/3)H -1 , rather than just H -1 . So, based on the observed value of the Hubble parameter, we predict ...
NASA FUSE Satellite Solves the Case of the Missing Deuterium
... atoms within a hundred light years of the sun and values as low as 5 parts per million elsewhere. When a region is disturbed by a supernova or hot stars, dust grains are vaporized, releasing deuterium atoms back into a gas phase. FUSE detects high deuterium levels in such regions. Primordial deuteri ...
... atoms within a hundred light years of the sun and values as low as 5 parts per million elsewhere. When a region is disturbed by a supernova or hot stars, dust grains are vaporized, releasing deuterium atoms back into a gas phase. FUSE detects high deuterium levels in such regions. Primordial deuteri ...
Clusters as laboratories for the study of galaxy evolution
... Back in 1984, (and still?) the prevalent view was that clusters were themselves agents that influenced the evolution of galaxies, so that the processes that produced different morphological types, for example, could be observed at work in (today’s) rich clusters. This notion is very different than t ...
... Back in 1984, (and still?) the prevalent view was that clusters were themselves agents that influenced the evolution of galaxies, so that the processes that produced different morphological types, for example, could be observed at work in (today’s) rich clusters. This notion is very different than t ...
The Milky Way Galaxy
... The hydrogen atom, if it is in the spin parallel state, can make a transition to the spin anti-parallel state releasing energy When a transition does a occur, energy is released corresponding to a wavelength of 21 cm, which is in the radio portion of the electromagnetic spectrum This radiation can p ...
... The hydrogen atom, if it is in the spin parallel state, can make a transition to the spin anti-parallel state releasing energy When a transition does a occur, energy is released corresponding to a wavelength of 21 cm, which is in the radio portion of the electromagnetic spectrum This radiation can p ...
Young Stars in AGN
... populate the central regions of most galaxies and also that nuclear star formation may play an important role in Active Galactic Nuclei (AGN). If a SB-AGN connection exists, and if the nuclear SB has different characteristics for different AGN types, this will be of importance both for galaxy (and A ...
... populate the central regions of most galaxies and also that nuclear star formation may play an important role in Active Galactic Nuclei (AGN). If a SB-AGN connection exists, and if the nuclear SB has different characteristics for different AGN types, this will be of importance both for galaxy (and A ...
Introduction to Observational Cosmology
... (i.e. we are starting with the answer first) 1. Averaged over sufficiently large scales, the universe is nearly homogeneous and isotropic (=cosmological principle) 2. The universe, i.e. space itself, is expanding so that the distance D between any pairs of widely separated points increases as dD/dt~ ...
... (i.e. we are starting with the answer first) 1. Averaged over sufficiently large scales, the universe is nearly homogeneous and isotropic (=cosmological principle) 2. The universe, i.e. space itself, is expanding so that the distance D between any pairs of widely separated points increases as dD/dt~ ...
Lecture 9: The interstellar medium (ISM)
... strengths of IS absorption lines. There is no correlation of depletion factor with atomic weight A, but a good correlation with the element’s condensation temperature Tc. ...
... strengths of IS absorption lines. There is no correlation of depletion factor with atomic weight A, but a good correlation with the element’s condensation temperature Tc. ...
The Southern Fall PDF - Treasures of the Southern Sky
... Open clusters such as NGC 3293 are excellent laboratories for studying the late stages of star formation and their early evolution. The young stars have not moved far from their birthplace, so it is certain that they are all at the same distance. This allows a detailed comparison to be made of the i ...
... Open clusters such as NGC 3293 are excellent laboratories for studying the late stages of star formation and their early evolution. The young stars have not moved far from their birthplace, so it is certain that they are all at the same distance. This allows a detailed comparison to be made of the i ...
project.generative.interactive.music
... Dave programmed to suit my ideas. ArtSong was great to start with, but now it is perfect. The best music generator program you can get on the market. I generated the fractal images with UltraFractal, the art images I got from Judith.P.Fischer, and the sources of images of stars, galaxies and so on I ...
... Dave programmed to suit my ideas. ArtSong was great to start with, but now it is perfect. The best music generator program you can get on the market. I generated the fractal images with UltraFractal, the art images I got from Judith.P.Fischer, and the sources of images of stars, galaxies and so on I ...
Abstract - UChicago High Energy Physics
... composition [2, 9, 12–16]. The neutrino flavor composition above the neutrino trapping surface depends not only on thermodynamics in the trapped regions, but also the oscillation of neutrinos as they leave the disk. The high neutrino density coupled with high matter density provide an environment wh ...
... composition [2, 9, 12–16]. The neutrino flavor composition above the neutrino trapping surface depends not only on thermodynamics in the trapped regions, but also the oscillation of neutrinos as they leave the disk. The high neutrino density coupled with high matter density provide an environment wh ...
the printable Observing Olympics Object Info Sheet in pdf
... ago. Another way to create a tidal stream is with a major merger event when two galaxies of approximately equal size interact gravitationally and eventually merge together into one bigger galaxy. This can eject a stream of stars that looks quite a bit like this as well. At present we do not know if ...
... ago. Another way to create a tidal stream is with a major merger event when two galaxies of approximately equal size interact gravitationally and eventually merge together into one bigger galaxy. This can eject a stream of stars that looks quite a bit like this as well. At present we do not know if ...
December - Rose City Astronomers
... Markarian 205, which in turn is tightly wound spiral galaxy with a quasar at its core. Through my scope NGC 4319 was actually the fainter of the group of three NGC galaxies it’s a part of – 4291, 4386 are both brighter. All three galaxies comfortably fit into the same low power field, with 4291 the ...
... Markarian 205, which in turn is tightly wound spiral galaxy with a quasar at its core. Through my scope NGC 4319 was actually the fainter of the group of three NGC galaxies it’s a part of – 4291, 4386 are both brighter. All three galaxies comfortably fit into the same low power field, with 4291 the ...
Unit 4: Astronomy
... 3. Describe a couple of ways that our atmosphere interferes with the observation of objects in space and a couple of ways that astronomers can reduce or eliminate this interference. 4. What is a “non-optical telescope”? Describe a couple of advantages to using one of these in addition to an optical ...
... 3. Describe a couple of ways that our atmosphere interferes with the observation of objects in space and a couple of ways that astronomers can reduce or eliminate this interference. 4. What is a “non-optical telescope”? Describe a couple of advantages to using one of these in addition to an optical ...
Gresham Lecture, Wednesday 15 December 2010 Unsolved
... have “known unknowns” – things that we know must exist or happen to allow our universe to exist but of which we have no real understanding. In this lecture we will look at some of the, as yet unsolved, mysteries of the Universe and describe the scientific instruments that are now coming into use or ...
... have “known unknowns” – things that we know must exist or happen to allow our universe to exist but of which we have no real understanding. In this lecture we will look at some of the, as yet unsolved, mysteries of the Universe and describe the scientific instruments that are now coming into use or ...
Galaxy Zoo
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.