Radiation: The Key to Understanding the Universe
... the place of nuclear energy generation. The temperature decreases outwards and the energy generated at the centre in the form of γ rays flows outwards, continuously getting absorbed and reemitted. The radiation that we receive from the stars is emitted from what is called the photosphere beyond (outw ...
... the place of nuclear energy generation. The temperature decreases outwards and the energy generated at the centre in the form of γ rays flows outwards, continuously getting absorbed and reemitted. The radiation that we receive from the stars is emitted from what is called the photosphere beyond (outw ...
Slide 1
... Quick Region Inventory (http://irsa.ipac.caltech.edu/applications/QuickStats/) View Catalog Coverage Maps and Source Inventories for the position or object name you are interested in Open SkyQuery (http://openskyquery.net/Sky/skysite/) - Query Databases and Cross-Match Object Lists from some of th ...
... Quick Region Inventory (http://irsa.ipac.caltech.edu/applications/QuickStats/) View Catalog Coverage Maps and Source Inventories for the position or object name you are interested in Open SkyQuery (http://openskyquery.net/Sky/skysite/) - Query Databases and Cross-Match Object Lists from some of th ...
Slide 1
... including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. ...
... including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. ...
The Moon
... you sorted yesterday? How were the cards from yesterday different from the cards last week when we looked at Solar System objects? Discuss at your table. ...
... you sorted yesterday? How were the cards from yesterday different from the cards last week when we looked at Solar System objects? Discuss at your table. ...
Galaxies Quiz – Study Guide KEY You will be given a set of images
... 18. What is TRUE about all clusters (open AND globular)? Same ____AGE__; All rotate around __CENTER OF GALAXY____. 19. In our Milky Way, where do we see the most star formation? __in spiral arms__ Miscellaneous and/or possible bonus questions: 20. When the Milky Way and Andromeda eventually merge, t ...
... 18. What is TRUE about all clusters (open AND globular)? Same ____AGE__; All rotate around __CENTER OF GALAXY____. 19. In our Milky Way, where do we see the most star formation? __in spiral arms__ Miscellaneous and/or possible bonus questions: 20. When the Milky Way and Andromeda eventually merge, t ...
ppt
... few galaxies (1-2 Mpc). Even Hubble Space Telescope cannot find Cepheids beyond the Virgo cluster (16 Mpc). Beyond 1-2Mpc, Hubble used… ...
... few galaxies (1-2 Mpc). Even Hubble Space Telescope cannot find Cepheids beyond the Virgo cluster (16 Mpc). Beyond 1-2Mpc, Hubble used… ...
File - The World of Astronomy
... dust and gas. They usually contain several million to over a trillion stars and can range in size from a few thousand to several hundred thousand light-years across. There are hundreds of billions of galaxies in the universe. Galaxies come in many different sizes, shapes and brightnesses and, like s ...
... dust and gas. They usually contain several million to over a trillion stars and can range in size from a few thousand to several hundred thousand light-years across. There are hundreds of billions of galaxies in the universe. Galaxies come in many different sizes, shapes and brightnesses and, like s ...
has occurred over the past 14 billion years COSMIC DOWNSIZING
... them to be so close at hand! Moreover, the optical spectra of many of these galaxies showed absolutely no evidence of black hole activity; without the x-ray observations, astronomers could never have discovered the supermassive black holes lurking in their cores. This research suggests that not all ...
... them to be so close at hand! Moreover, the optical spectra of many of these galaxies showed absolutely no evidence of black hole activity; without the x-ray observations, astronomers could never have discovered the supermassive black holes lurking in their cores. This research suggests that not all ...
Galaxies – Island universes
... Quasi-Stellar Radio Sources • In 1960’s, we found “stars” with strong radio emission • Spectra contained few lines, and couldn’t be identified • Spectra showed both absorption and emission lines. But stars rarely have emission lines • Hmmm. Bizarre! ...
... Quasi-Stellar Radio Sources • In 1960’s, we found “stars” with strong radio emission • Spectra contained few lines, and couldn’t be identified • Spectra showed both absorption and emission lines. But stars rarely have emission lines • Hmmm. Bizarre! ...
Chapter 3 Cosmology 3.1 The Doppler effect
... The Andromeda galaxy is the nearest large galaxy to the Milky Way. Andromeda can just be seen by the unaided eye on a clear night. By taking photographs of Andromeda using a large telescope, Edwin Hubble was able to identify Cepheid variable stars in Andromeda. These stars vary in brightness with a ...
... The Andromeda galaxy is the nearest large galaxy to the Milky Way. Andromeda can just be seen by the unaided eye on a clear night. By taking photographs of Andromeda using a large telescope, Edwin Hubble was able to identify Cepheid variable stars in Andromeda. These stars vary in brightness with a ...
2.3 Peculiar galaxies
... centre of the galaxy, it can have an influence on huge regions much bigger than the galaxy itself. AGN properties : nuclear jets. Measurements in the central regions of radio galaxies show that such jets can continue to be seen down to very tiny scales. Repeated measurements on the very smallest sca ...
... centre of the galaxy, it can have an influence on huge regions much bigger than the galaxy itself. AGN properties : nuclear jets. Measurements in the central regions of radio galaxies show that such jets can continue to be seen down to very tiny scales. Repeated measurements on the very smallest sca ...
UniverseofGalaxies
... Milky Way mergers • The MW galaxy is tidally interacting with two small galaxies (the MCs) and ...
... Milky Way mergers • The MW galaxy is tidally interacting with two small galaxies (the MCs) and ...
Lecture 12
... The relationship between redshift and distance is linear for low values of z, but becomes rather complex when we look at very distant objects (very far back in time). As the Universe expands the value of H0 changes as the geometry of the Universe changes. Partly this is a ‘standard’ result from appl ...
... The relationship between redshift and distance is linear for low values of z, but becomes rather complex when we look at very distant objects (very far back in time). As the Universe expands the value of H0 changes as the geometry of the Universe changes. Partly this is a ‘standard’ result from appl ...
LOFAR - Veres Péter
... Things to know about LFR: • deeply burried inside the host galaxy • size less than a few tenths of arcsecs • the cause: Refractive Interstellar Scintilation • only present at low frequencies Things to expect • if the LFVs turn out to be high redshift objects they define a clean sample of galaxies • ...
... Things to know about LFR: • deeply burried inside the host galaxy • size less than a few tenths of arcsecs • the cause: Refractive Interstellar Scintilation • only present at low frequencies Things to expect • if the LFVs turn out to be high redshift objects they define a clean sample of galaxies • ...
2. A giant hand took one of the planets discovered
... 2. A giant hand took one of the planets discovered around other stars and put it in the solar system at the same distance from the sun as from its star. The mass of the planet is approximately that of Jupiter and the orbit is approximately that of Earth. These are the “hot Jupiters”, as big as Jupit ...
... 2. A giant hand took one of the planets discovered around other stars and put it in the solar system at the same distance from the sun as from its star. The mass of the planet is approximately that of Jupiter and the orbit is approximately that of Earth. These are the “hot Jupiters”, as big as Jupit ...
Galaxies - Academic Computer Center
... size, you can find its actual, linear size Now measure the rotation curve: the velocity of stars as a function of distance from the center of the galaxy (x-symbols on plot) Use Newton’s modification of Kepler’s third law to estimate a rotation curve for the lightemitting the mass in the galaxy (star ...
... size, you can find its actual, linear size Now measure the rotation curve: the velocity of stars as a function of distance from the center of the galaxy (x-symbols on plot) Use Newton’s modification of Kepler’s third law to estimate a rotation curve for the lightemitting the mass in the galaxy (star ...
Presentation
... Star forming blue galaxies are being transformed. The most luminous galaxies were assembled at z>1. Some simulations overestimate z<1 galaxy assembly. ...
... Star forming blue galaxies are being transformed. The most luminous galaxies were assembled at z>1. Some simulations overestimate z<1 galaxy assembly. ...
Introduction to Galaxies and Cosmology Exercises 2
... them to relate observational quantities to the theory. The exercises will touch upon parts from chapters 2–6 in J&L, so make sure that you have read through those chapters before working with the exercises. • Galaxies and surface brightness • Star forming galaxies and galaxy evolution • AGN, black h ...
... them to relate observational quantities to the theory. The exercises will touch upon parts from chapters 2–6 in J&L, so make sure that you have read through those chapters before working with the exercises. • Galaxies and surface brightness • Star forming galaxies and galaxy evolution • AGN, black h ...
Multiple Choice, continued
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
... • The galaxy in which we live, the Milky Way, is a spiral galaxy in which the sun is one of hundreds of billions of stars. • Two irregular galaxies, the Large Magellanic Cloud and Small Magellanic Cloud, are our closest neighbors. • These three galaxies are called the Local Group. ...
The Universe and Galaxies - West Jefferson Local Schools
... - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
... - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
The Universe and Galaxies - West Jefferson Local Schools
... - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
... - Dark energy – theoretical energy that might be causing accelerated expansion of the universe ...
30galaxies and the universe
... Black holes in the centers of giant galaxies—some more than one billion solar masses—had enough infalling gas to once blaze as quasars. The final mass of a black hole is not primordial, but instead is determined during the galaxy formation process. This shows that there is a close relationship betwe ...
... Black holes in the centers of giant galaxies—some more than one billion solar masses—had enough infalling gas to once blaze as quasars. The final mass of a black hole is not primordial, but instead is determined during the galaxy formation process. This shows that there is a close relationship betwe ...
Organizing the cosmos
... The galaxy is estimated to contain at least one trillion stars. Approximately 100 billion of these stars alone might be like our Sun in terms of temperature and lifetime. ...
... The galaxy is estimated to contain at least one trillion stars. Approximately 100 billion of these stars alone might be like our Sun in terms of temperature and lifetime. ...
Quasar
Quasars (/ˈkweɪzɑr/) or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN). Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather than extended sources similar to galaxies. Their spectra contain very broad emission lines, unlike any known from stars, hence the name ""quasi-stellar."" Their luminosity can be 100 times greater than that of the Milky Way. Most quasars were formed approximately 12 billion years ago caused by collisions of galaxies and their central black holes merging to form either a supermassive black hole or a Binary black hole system.Although the true nature of these objects was controversial until the early 1980s, there is now a scientific consensus that a quasar is a compact region in the center of a massive galaxy surrounding a central supermassive black hole. Its size is 10–10,000 times the Schwarzschild radius of the black hole. The energy emitted by a quasar derives from mass falling onto the accretion disc around the black hole.