AWG recommendation on Cosmic Vision
... The AWG believes that these scientific issues will remain at the centre of cosmological interest for at least the next two decades and that great progress towards their solution can be achieved within the Cosmic Vision programme. To maintain Europe's leading role in widefield imaging, and correspond ...
... The AWG believes that these scientific issues will remain at the centre of cosmological interest for at least the next two decades and that great progress towards their solution can be achieved within the Cosmic Vision programme. To maintain Europe's leading role in widefield imaging, and correspond ...
Unit 11: Dark Energy
... As far as astronomers knew at that time, the stars in the Milky Way were not moving in any systematic way. So when he wrote down an expression for the way gravity acts in the universe, Einstein added in an extra term to keep the universe static. This cosmological constant acted as a repulsive force ...
... As far as astronomers knew at that time, the stars in the Milky Way were not moving in any systematic way. So when he wrote down an expression for the way gravity acts in the universe, Einstein added in an extra term to keep the universe static. This cosmological constant acted as a repulsive force ...
Research proposal uploaded for ESO fellowship
... How is the star formation history of galaxies affected by supernovae feedback? Is this feedback powerful enough as to drive the global star formation rate decline of the universe? Supernova feedback represents a long standing problem in galaxy formation model. Currently, toy models are used to treat ...
... How is the star formation history of galaxies affected by supernovae feedback? Is this feedback powerful enough as to drive the global star formation rate decline of the universe? Supernova feedback represents a long standing problem in galaxy formation model. Currently, toy models are used to treat ...
a MS Word version.
... 11. Use the figure linked to "XI. ....click here for video-text comparison..." to describe all the steps of the Big Bang. Make sure to describe what is meant by GUTs and TOEs and the epochs related to these theories. What major early epoch is not mentioned by the video but is now a very important pa ...
... 11. Use the figure linked to "XI. ....click here for video-text comparison..." to describe all the steps of the Big Bang. Make sure to describe what is meant by GUTs and TOEs and the epochs related to these theories. What major early epoch is not mentioned by the video but is now a very important pa ...
Populations of Galaxies and their Formation at z < 7
... integrated stellar mass in the universe increases gradually throughout this time suggesting that galaxy formation does not happen all at once. 3. Galaxies at high redshifts are peculiar and are likely undergoing mergers. The transition from mergers to normal Hubble types occurs at about z~1.5. Calcu ...
... integrated stellar mass in the universe increases gradually throughout this time suggesting that galaxy formation does not happen all at once. 3. Galaxies at high redshifts are peculiar and are likely undergoing mergers. The transition from mergers to normal Hubble types occurs at about z~1.5. Calcu ...
Conference Summary Richard Ellis (Caltech) ITALIA
... • Do we have a complete census of star formation activity and baryon content at all epochs? - key role of multi-wavelength techniques • How did the Hubble Sequence emerge at z<1 from the varied active and irregular sources at z > 2? What are the physical processes involved? Are the detailed models c ...
... • Do we have a complete census of star formation activity and baryon content at all epochs? - key role of multi-wavelength techniques • How did the Hubble Sequence emerge at z<1 from the varied active and irregular sources at z > 2? What are the physical processes involved? Are the detailed models c ...
PPT - ALFALFA survey
... HI mass-to-light ratio vs Luminosity. We see an inverse relationship between the fractional HI mass (HI mass-to-light ratio) and absolute magnitude such that the more luminous an object the lower the fractional gas content it will have. ...
... HI mass-to-light ratio vs Luminosity. We see an inverse relationship between the fractional HI mass (HI mass-to-light ratio) and absolute magnitude such that the more luminous an object the lower the fractional gas content it will have. ...
Galaxies - Indiana University Astronomy
... where v is the velocity in km/sec, c is the speed of light (300,000 km/sec), is the rest wavelength of the radiation, and is the amount the radiation has been shifted towards longer wavelengths ( = the observed wavelength minus the rest wavelength). For these spectra, wavelengths are usually ...
... where v is the velocity in km/sec, c is the speed of light (300,000 km/sec), is the rest wavelength of the radiation, and is the amount the radiation has been shifted towards longer wavelengths ( = the observed wavelength minus the rest wavelength). For these spectra, wavelengths are usually ...
Science and the Universe
... • There is indirect evidence that much of our Galaxy is made of material that cannot be observed with presentday instruments – Thus, much of our Galaxy seems to consist of dark matter • Stars in a number of places form clusters, each containing up to hundreds of thousands of stars and taking up a vo ...
... • There is indirect evidence that much of our Galaxy is made of material that cannot be observed with presentday instruments – Thus, much of our Galaxy seems to consist of dark matter • Stars in a number of places form clusters, each containing up to hundreds of thousands of stars and taking up a vo ...
Astrophysics - Mr Priest`s Physics Notes
... significant advantages over visible light telescopes. Disadvantages are discussed below, but this “transparency” of radio waves is the reason why it continues to be widely used, since it allows us to probe the internal structure of astronomical objects that are opaque at shorter wavelengths. In part ...
... significant advantages over visible light telescopes. Disadvantages are discussed below, but this “transparency” of radio waves is the reason why it continues to be widely used, since it allows us to probe the internal structure of astronomical objects that are opaque at shorter wavelengths. In part ...
ppt document - FacStaff Home Page for CBU
... Do galaxies “evolve” from one type into another? Based on the different masses of the different galaxies, it appears that they do NOT evolve from one type into another. Some of the galaxies appear to “collide” with other galaxies as they move, and such a collision may affect the shape. Some of the b ...
... Do galaxies “evolve” from one type into another? Based on the different masses of the different galaxies, it appears that they do NOT evolve from one type into another. Some of the galaxies appear to “collide” with other galaxies as they move, and such a collision may affect the shape. Some of the b ...
PPT
... allows us to figure out how long the galaxy took to reach its current distance – Measuring Hubble’s constant tells us that amount of time: about 14 billion years ...
... allows us to figure out how long the galaxy took to reach its current distance – Measuring Hubble’s constant tells us that amount of time: about 14 billion years ...
Document
... 4. The cosmic distance ladder • This lecture: • Measuring distances to – things within the solar system – things within the solar neighbourhood – things within the galaxy – nearby galaxies – distant galaxies ...
... 4. The cosmic distance ladder • This lecture: • Measuring distances to – things within the solar system – things within the solar neighbourhood – things within the galaxy – nearby galaxies – distant galaxies ...
Cosmology with GMRT
... – Apply to a single object (optical results are averages over large redshift range) – Not subject to the same systematics – Currently probe a complementary redshift range ...
... – Apply to a single object (optical results are averages over large redshift range) – Not subject to the same systematics – Currently probe a complementary redshift range ...
doc - Jnoodle
... In the center we have the sun, our closest star. There are so far 9 known planets, of which the 5 inner have been known since ancient times, Uranus was discovered in the 18th and Neptune in the 19th century, Pluto as late as 1930. The gravitational disturbances on the orbits of thus far known planet ...
... In the center we have the sun, our closest star. There are so far 9 known planets, of which the 5 inner have been known since ancient times, Uranus was discovered in the 18th and Neptune in the 19th century, Pluto as late as 1930. The gravitational disturbances on the orbits of thus far known planet ...
File
... This presentation was initially developed for the “Modeling the Universe” educator workshop by the Universe Education Forum and our NASA mission partners. For additional information and activities related to the themes of this presentation, please visit the “Modeling the Universe” web site: http://w ...
... This presentation was initially developed for the “Modeling the Universe” educator workshop by the Universe Education Forum and our NASA mission partners. For additional information and activities related to the themes of this presentation, please visit the “Modeling the Universe” web site: http://w ...
Systematics of Galaxy Properties and Scaling Relations Ay 127
... The observed scaling is R ~ I -0.8. Thus, both dissipative collapse and dissipationless merging probably play a role ...
... The observed scaling is R ~ I -0.8. Thus, both dissipative collapse and dissipationless merging probably play a role ...
Our Expanding Universe - Center for Astrophysics
... This presentation was initially developed for the “Modeling the Universe” educator workshop by the Universe Education Forum and our NASA mission partners. For additional information and activities related to the themes of this presentation, please visit the “Modeling the Universe” web site: http://w ...
... This presentation was initially developed for the “Modeling the Universe” educator workshop by the Universe Education Forum and our NASA mission partners. For additional information and activities related to the themes of this presentation, please visit the “Modeling the Universe” web site: http://w ...
Think about the universe
... the gas and dust begin to collapse, forming a cloud. Such clouds of interstellar matter are called nebulae and are really like star nurseries. The Great This nuclear fusion reaction in stars Nebula in the constellation of Orion is a nebula large releases vast amounts of energy. enough to be seen wit ...
... the gas and dust begin to collapse, forming a cloud. Such clouds of interstellar matter are called nebulae and are really like star nurseries. The Great This nuclear fusion reaction in stars Nebula in the constellation of Orion is a nebula large releases vast amounts of energy. enough to be seen wit ...
15-3 Notes: Galaxies
... Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of gas, dust, and new stars that have formed. The galaxy in which we live is a spi ...
... Astronomers classify a galaxy as a spiral, elliptical, or irregular galaxy according to its shape. Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. The spiral arms are made up of gas, dust, and new stars that have formed. The galaxy in which we live is a spi ...
6 The mysterious universe
... cloud is accelerated. The now dense cloud is known as stars differ quite noticeably from one another, both in a protostar. At the same time, the increasing pressure how bright they appear to us and in their colour (see causes the temperature to rise. This effect is modelled Investigation 6.4). Some ...
... cloud is accelerated. The now dense cloud is known as stars differ quite noticeably from one another, both in a protostar. At the same time, the increasing pressure how bright they appear to us and in their colour (see causes the temperature to rise. This effect is modelled Investigation 6.4). Some ...
Gugus Bintang [Compatibility Mode]
... 2. Identify stellar types (such as blue giant stars and red giant stars), determine luminosity from the type, measure brightness, and then calculate distance. If the giant star is in a cluster, then we can determine the distance to the cluster by using several giant stars in the cluster to get its d ...
... 2. Identify stellar types (such as blue giant stars and red giant stars), determine luminosity from the type, measure brightness, and then calculate distance. If the giant star is in a cluster, then we can determine the distance to the cluster by using several giant stars in the cluster to get its d ...
1 VERSION 21A Cosmos+ A big bang family performance about the
... eyeball. They will never become falling tears, as there is no gravity pulling them away from the eye. ASTRONOMER Gravity is a great creator and destroyer. It will crush everything into black holes. A black hole is an area in the universe where the gravity is so dense that not even light can escape. ...
... eyeball. They will never become falling tears, as there is no gravity pulling them away from the eye. ASTRONOMER Gravity is a great creator and destroyer. It will crush everything into black holes. A black hole is an area in the universe where the gravity is so dense that not even light can escape. ...
Astronomy Triemester Review Sheet 2015
... 350 light years away. A. 2 light years C. 7 light years B. 25 light year D. 20,000 light years 3. The smallest size/distance ratio that John Glenn can see is 1/3300. This means that John can be no further away than 3,300 km from two objects, separated by 1km, and still see them as two distinct objec ...
... 350 light years away. A. 2 light years C. 7 light years B. 25 light year D. 20,000 light years 3. The smallest size/distance ratio that John Glenn can see is 1/3300. This means that John can be no further away than 3,300 km from two objects, separated by 1km, and still see them as two distinct objec ...
Our Place in Space
... should print out the cards (preferably in color) and laminate them so that the information on each object appears on the reverse side of the image of that object. ...
... should print out the cards (preferably in color) and laminate them so that the information on each object appears on the reverse side of the image of that object. ...
Observable universe
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination—and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28 gigaparsecs (91 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46–47 billion light-years away.