Galaxies - Mike Brotherton
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million solar masses. ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 2.6 million solar masses. ...
Ch17_Galaxies
... Galaxy Clusters • In general, all clusters need dark matter to explain galactic motions and the confinement of hot intergalactic gas within cluster • Near clusters appear to have their members fairly smoothly spread out, while far away clusters (and hence younger clusters) are more ragged looking – ...
... Galaxy Clusters • In general, all clusters need dark matter to explain galactic motions and the confinement of hot intergalactic gas within cluster • Near clusters appear to have their members fairly smoothly spread out, while far away clusters (and hence younger clusters) are more ragged looking – ...
gravity - Nikhef
... Why gravitational waves? We need gravitational waves!! There are questions we cannot answer without GWs: Theory: how correct is General Relativity? Astronomy: what is the nature of Dark Matter and/or Dark Energy? Astronomy: what processes occur in exotic objects? Cosmology: what happened after the ...
... Why gravitational waves? We need gravitational waves!! There are questions we cannot answer without GWs: Theory: how correct is General Relativity? Astronomy: what is the nature of Dark Matter and/or Dark Energy? Astronomy: what processes occur in exotic objects? Cosmology: what happened after the ...
instructor notes: weeks 9/10
... Answer. It is the leftover energy from the early universe. At early times the universe is assumed to have been very hot, but a few hundred thousand years after the Big Bang the fireball had cooled considerably, although still at high temperatures. When the fireball had cooled to T ≈ 3000 K it becam ...
... Answer. It is the leftover energy from the early universe. At early times the universe is assumed to have been very hot, but a few hundred thousand years after the Big Bang the fireball had cooled considerably, although still at high temperatures. When the fireball had cooled to T ≈ 3000 K it becam ...
flare swg usa
... SEDs of young (<104 yr old) protostellar sources. YSOs down to about 0.2 M should be accessible out to >~1kpc. Clusters of embedded protostars inside dark cores along the Many protostars are clustered within a single “core” as typically A filament seen at 70-160-250 filament as seen with S ...
... SEDs of young (<104 yr old) protostellar sources. YSOs down to about 0.2 M should be accessible out to >~1kpc. Clusters of embedded protostars inside dark cores along the Many protostars are clustered within a single “core” as typically A filament seen at 70-160-250 filament as seen with S ...
The Milky Way and other Galaxies
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 4 million solar masses. ...
... Measuring the Mass of the Black Hole in the Center of the Milky Way By following the orbits of individual stars near the center of the Milky Way, the mass of the central black hole could be determined to be ~ 4 million solar masses. ...
Formation of Globular Clusters: In and Out of Dwarf Galaxies
... Globular cluster vs. field star metallicity ...
... Globular cluster vs. field star metallicity ...
Suppose you tried to determine where we are in the galaxy by
... the orbit of the Sun, indicating that the majority of the Milky Way's mass lies within the Sun's orbit. c) False, the Milky Way's rotation curve remains flat well beyond the orbit of the Sun, indicating that the majority of the Milky Way's mass lies beyond the Sun's orbit. d) False, the Milky Way' ...
... the orbit of the Sun, indicating that the majority of the Milky Way's mass lies within the Sun's orbit. c) False, the Milky Way's rotation curve remains flat well beyond the orbit of the Sun, indicating that the majority of the Milky Way's mass lies beyond the Sun's orbit. d) False, the Milky Way' ...
What is a planet? - X-ray and Observational Astronomy Group
... Giordano Bruno said that the fixed stars are really suns like our own, with planets going round them • 1991 Radio astronomers Alex Wolszczan & Dale Frail discovered planets around a pulsar PSR1257+12 – Variations in arrival times of pulses suggests presence of three or more planets – Planets probabl ...
... Giordano Bruno said that the fixed stars are really suns like our own, with planets going round them • 1991 Radio astronomers Alex Wolszczan & Dale Frail discovered planets around a pulsar PSR1257+12 – Variations in arrival times of pulses suggests presence of three or more planets – Planets probabl ...
the Local Group - Simon P Driver
... classifying the Local Group • the Local Group has only about 10 significant galaxies (L > 108 Lsolar), so does not qualify as a cluster – NB, dwarf spheroidals etc. are not detectable at large distances, so don’t make up part of the total galaxy count for the Local Group • about half of known gal ...
... classifying the Local Group • the Local Group has only about 10 significant galaxies (L > 108 Lsolar), so does not qualify as a cluster – NB, dwarf spheroidals etc. are not detectable at large distances, so don’t make up part of the total galaxy count for the Local Group • about half of known gal ...
A Map of the Universe
... picture, at a scale of 1/108 , shows the entire Earth. The 14th picture, at a scale of 1/1014 , shows the entire Solar system. The 18th picture, at a scale of 1/1018 , includes α Centauri, The 22nd picture, at a scale of 1/1022 shows all of the Milky Way Galaxy. The 26th and last picture in the sequ ...
... picture, at a scale of 1/108 , shows the entire Earth. The 14th picture, at a scale of 1/1014 , shows the entire Solar system. The 18th picture, at a scale of 1/1018 , includes α Centauri, The 22nd picture, at a scale of 1/1022 shows all of the Milky Way Galaxy. The 26th and last picture in the sequ ...
David AJ Seargent
... to be common sense. Not only must we somehow get our heads around vast expanses of space and incredible depths of time, but we are also confronted with seemingly contradictory notion such as a vacuum which nevertheless appears to be filled with vast amounts of energy, particles which are also waves, ...
... to be common sense. Not only must we somehow get our heads around vast expanses of space and incredible depths of time, but we are also confronted with seemingly contradictory notion such as a vacuum which nevertheless appears to be filled with vast amounts of energy, particles which are also waves, ...
The False Force - Gravity
... The effect of gravity of large distances is also more significant in the universe on the macroscopic scale, showing that the presence of large masses seem to be responsible for gravity, despite distance. The distortion of space-time can be felt at extremely macroscopic distances. Gravity also seems ...
... The effect of gravity of large distances is also more significant in the universe on the macroscopic scale, showing that the presence of large masses seem to be responsible for gravity, despite distance. The distortion of space-time can be felt at extremely macroscopic distances. Gravity also seems ...
Institute for Astrophysical Research Seminar Series
... Steven Snowden (NASA Goddard Space Flight Center) The Diffuse X-ray Background, from Earth's Exosphere to the Edge of the Universe OR One Astronomer's Signal is Another Astronomer's Contamination ...
... Steven Snowden (NASA Goddard Space Flight Center) The Diffuse X-ray Background, from Earth's Exosphere to the Edge of the Universe OR One Astronomer's Signal is Another Astronomer's Contamination ...
the periodic waveguided multiverse design
... directly explain the pure 4D dynamical nature of the huge Einstein's rest mass energy E=PC4=MC4². Indeed, Richard Feynman mentioned that contemporary physics couldn’t explain where it is accumulated: “It is important to realize that in physics today, we have no knowledge of what energy is” (Feynman ...
... directly explain the pure 4D dynamical nature of the huge Einstein's rest mass energy E=PC4=MC4². Indeed, Richard Feynman mentioned that contemporary physics couldn’t explain where it is accumulated: “It is important to realize that in physics today, we have no knowledge of what energy is” (Feynman ...
Galaxies - cloudfront.net
... billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, and irregular galaxies. • Spiral galaxies spin and appear as a rotating disk of stars and dust, with a bulge in the middle. Several spiral arms reach outward from the central bulge like the arms of a pin ...
... billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, and irregular galaxies. • Spiral galaxies spin and appear as a rotating disk of stars and dust, with a bulge in the middle. Several spiral arms reach outward from the central bulge like the arms of a pin ...
Practical cosmology with the Local Volume galaxies
... Jerjen et al. (2000), Sharina et al. (2008) and others. About 150 LV members were resolved into stars in the first time. e) High angular resolution observations of the LV galaxies were performed abroad the Hubble Space Telescope, and accurate TRGB distances were measured for ~250 galaxies. The resul ...
... Jerjen et al. (2000), Sharina et al. (2008) and others. About 150 LV members were resolved into stars in the first time. e) High angular resolution observations of the LV galaxies were performed abroad the Hubble Space Telescope, and accurate TRGB distances were measured for ~250 galaxies. The resul ...
Are Gamma-Ray Bursts good Star Formation Indicators?
... Current samples of GRBs are too small and incomplete, especially in terms of redshifts, to make firm statements about global star formation. However, if GRBs are unbiased tracers of star formation then samples of their hosts should contain populations of galaxies in proportion to the contribution of ...
... Current samples of GRBs are too small and incomplete, especially in terms of redshifts, to make firm statements about global star formation. However, if GRBs are unbiased tracers of star formation then samples of their hosts should contain populations of galaxies in proportion to the contribution of ...
Document
... elliptical galaxies in his classification diagram (see figure on the next slide). Though sometimes called “transition galaxies,” this designation should not be taken literally: The diagram is not meant to imply that spiral galaxies evolve with time into ellipticals (or vice versa) in a simple manner ...
... elliptical galaxies in his classification diagram (see figure on the next slide). Though sometimes called “transition galaxies,” this designation should not be taken literally: The diagram is not meant to imply that spiral galaxies evolve with time into ellipticals (or vice versa) in a simple manner ...
The Strikingly Uniform, Highly Turbulent Interstellar Medium of the
... awarded 8.1h in bands 7 and 8 to study the red-shifted 157.7µm (2 P3/2 → 2 P1/2 ) fine-structure transition of ionized carbon, [C ii], and the underlying dust continuum emission in a sample of Hot DOGs spanning a range of redshifts and luminosities. Observations of W2246-0526, the first galaxy of th ...
... awarded 8.1h in bands 7 and 8 to study the red-shifted 157.7µm (2 P3/2 → 2 P1/2 ) fine-structure transition of ionized carbon, [C ii], and the underlying dust continuum emission in a sample of Hot DOGs spanning a range of redshifts and luminosities. Observations of W2246-0526, the first galaxy of th ...
10 Astrophysics (Option E)
... from the position of the Moon they could calculate the tides. Since the largest objects in the sky gave such good predictions, it was a small step to assume that all the stars could be used to predict events too. Ancient civilizations were so convinced about this that they built huge structures to a ...
... from the position of the Moon they could calculate the tides. Since the largest objects in the sky gave such good predictions, it was a small step to assume that all the stars could be used to predict events too. Ancient civilizations were so convinced about this that they built huge structures to a ...
Relativity, Space-Time And Cosmology
... new theories encompass old ones. course, does not imply that they will explains all future experiments! In some cases new theories provide not only extensions of old ones, but a completely new insight into the workings of nature. Thus when going from Newton’s theory of gravitation to Einstein’s our ...
... new theories encompass old ones. course, does not imply that they will explains all future experiments! In some cases new theories provide not only extensions of old ones, but a completely new insight into the workings of nature. Thus when going from Newton’s theory of gravitation to Einstein’s our ...
Lecture 2 Astronomical Distances
... Largely due to Milky Way (Local Group) falling toward Virgo Cluster. ...
... Largely due to Milky Way (Local Group) falling toward Virgo Cluster. ...
Galaxies Galaxies M81
... which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar radio source, indicates that some incredibly powerful mechanism ...
... which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar radio source, indicates that some incredibly powerful mechanism ...
Introduction
... the same r 2 dependence as gravity, charge cancellation insures that large-scale electromagnetic forces are relatively weak; in contrast, gravitational forces don’t cancel out since all forms of matter have the same “gravitational charge”. The structure and evolution of stars is governed by a delica ...
... the same r 2 dependence as gravity, charge cancellation insures that large-scale electromagnetic forces are relatively weak; in contrast, gravitational forces don’t cancel out since all forms of matter have the same “gravitational charge”. The structure and evolution of stars is governed by a delica ...
Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws.Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.