Lecture 11
... Gamma Rays • In the 90s it was discovered that the sources were evenly distributed across the sky • Since then, the Bursts have been traced to massive explosions in distant galaxies ...
... Gamma Rays • In the 90s it was discovered that the sources were evenly distributed across the sky • Since then, the Bursts have been traced to massive explosions in distant galaxies ...
Dark Matter - UW - Laramie, Wyoming | University of Wyoming
... things like black holes, brown dwarfs, etc. – These are “Baryonic,” made from conventional stuff on the periodic table (like ...
... things like black holes, brown dwarfs, etc. – These are “Baryonic,” made from conventional stuff on the periodic table (like ...
Part 2 - MGNet
... • Spoted by Radiation from radio – gamma rays • Can be driven by black holes of billions of solar masses. ...
... • Spoted by Radiation from radio – gamma rays • Can be driven by black holes of billions of solar masses. ...
Galaxies at Cosmic Dawn Revealed in the First Year of the
... shifted redward ⇒ “redshift”, or “z” Given the cosmological model supported by the CMBR and many other observations (e.g., supernovae), the measurement of a galaxy’s redshift is both a ruler (how far is it from us?) and a clock (what was the age of the universe when the light we observe was emitted? ...
... shifted redward ⇒ “redshift”, or “z” Given the cosmological model supported by the CMBR and many other observations (e.g., supernovae), the measurement of a galaxy’s redshift is both a ruler (how far is it from us?) and a clock (what was the age of the universe when the light we observe was emitted? ...
Hierarchical galaxy formation
... Their properties are exactly what we’d expect if they are powered by black holes (BUT we still haven’t seen a black hole directly!) ...
... Their properties are exactly what we’d expect if they are powered by black holes (BUT we still haven’t seen a black hole directly!) ...
Part B
... massive distances encompassing billions of galaxies, they must be exceedingly rare events per galaxy. Expect rate of long GRBs in Milky Way to be about one burst every 1,000,000 years. ...
... massive distances encompassing billions of galaxies, they must be exceedingly rare events per galaxy. Expect rate of long GRBs in Milky Way to be about one burst every 1,000,000 years. ...
Active Galactic Nuclei
... Many nearby galaxies have some activity in their nucleus: they may have an extremely bright nucleus, or show a jet of emission, or have broad emission lines, or emit at radio wavelengths. These objects (which are probably just accreting a little mass) are said to have an Active Galactic Nucleus. ...
... Many nearby galaxies have some activity in their nucleus: they may have an extremely bright nucleus, or show a jet of emission, or have broad emission lines, or emit at radio wavelengths. These objects (which are probably just accreting a little mass) are said to have an Active Galactic Nucleus. ...
JMB CREIL 2
... 1. 3. The Coherent Raman effect on incoherent light. Several beams induce several polarisation states which interact. As the polarisation state have the same parity, the interaction must be of Raman type, for instance quadrupolar electric. To agree with thermodynamics, the beams which have the high ...
... 1. 3. The Coherent Raman effect on incoherent light. Several beams induce several polarisation states which interact. As the polarisation state have the same parity, the interaction must be of Raman type, for instance quadrupolar electric. To agree with thermodynamics, the beams which have the high ...
- IIT Kanpur
... Active Galactic Nuclei Active Galactic Nuclei (AGN) are some of the most powerful objects seen in the sky. As the name suggests, the centers of these galaxies show considerable activity in constract to the milky way whose center is quiet. AGNs are categorized into four broad classes, namely, Seyfert ...
... Active Galactic Nuclei Active Galactic Nuclei (AGN) are some of the most powerful objects seen in the sky. As the name suggests, the centers of these galaxies show considerable activity in constract to the milky way whose center is quiet. AGNs are categorized into four broad classes, namely, Seyfert ...
Astronomy Unit 4 Galaxies
... 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called __________________. 38. Galaxies that are brighter than normal are called __________________________ and emit mos ...
... 37. The distribution of galaxies in the universe is not ___________________, but clusters of galaxies lie within structures called ___________________ which surround empty regions called __________________. 38. Galaxies that are brighter than normal are called __________________________ and emit mos ...
Star Systems and Galaxies
... Smaller than other galaxies Many bright, young stars Lots of gas and dust to form new stars ...
... Smaller than other galaxies Many bright, young stars Lots of gas and dust to form new stars ...
The galaxies that host powerful radio sources
... Angular resolution – comparable to the best optical imaging. No more “blobs at high redshift” – will be able to map the distribution of gas and dust in forming galaxies. ...
... Angular resolution – comparable to the best optical imaging. No more “blobs at high redshift” – will be able to map the distribution of gas and dust in forming galaxies. ...
Stars, Galaxies, and the Universe Section 3 Stars, Galaxies, and the
... and are held together by gravity. The center of mass, or barycenter, is somewhere between the two stars. • In star systems that have more than two stars, two stars may revolve rapidly around a common barycenter, while a third star revolves more slowly at a greater distance from the pair. • Astronome ...
... and are held together by gravity. The center of mass, or barycenter, is somewhere between the two stars. • In star systems that have more than two stars, two stars may revolve rapidly around a common barycenter, while a third star revolves more slowly at a greater distance from the pair. • Astronome ...
HighRedshiftGalaxies
... the lower panel of this figure can be used to improve the mass estimate. Importantly, such a technique for determine accurate stellar masses can then be applied to all galaxies, regular or peculiar, irrespective of their dynamical state and over a range in redshift. The technique can be considered a ...
... the lower panel of this figure can be used to improve the mass estimate. Importantly, such a technique for determine accurate stellar masses can then be applied to all galaxies, regular or peculiar, irrespective of their dynamical state and over a range in redshift. The technique can be considered a ...
E:\2012-2013\SSU\PHS 207spring 2013\3rd test 4
... to assigned essay questions on Milky Way other galaxies, the Universe & Cosmology.docx 4 of 5 pages 5. What evidence do we have that particuliar galaxies are powered by black holes at their ...
... to assigned essay questions on Milky Way other galaxies, the Universe & Cosmology.docx 4 of 5 pages 5. What evidence do we have that particuliar galaxies are powered by black holes at their ...
Professor Emeritus, University of Canterbury Yevgeny Lifshitz
... to have an optical counterpart, a faint blue “star” with an anomalous spectrum. John Bolton, an Australian radio astronomer, thought that it had a large redshift and that it was therefore outside the milky way, but this was not believed by others. ...
... to have an optical counterpart, a faint blue “star” with an anomalous spectrum. John Bolton, an Australian radio astronomer, thought that it had a large redshift and that it was therefore outside the milky way, but this was not believed by others. ...
Gravitational Waves from Massive Black
... Model Quasar Luminosity Function. • The black-hole -- dark matter halo mass relation agrees with the evolution of clustering. • The galaxy dynamical time reproduces the correct number of high redshift quasars. ...
... Model Quasar Luminosity Function. • The black-hole -- dark matter halo mass relation agrees with the evolution of clustering. • The galaxy dynamical time reproduces the correct number of high redshift quasars. ...
The Host Galaxies of the Brightest Quasars: Gas
... quasar and its host, and the small angular size of the host are the main limitations to a spectroscopic study. Quasar host galaxies are typically 2–3 magnitudes fainter than their central quasar. Their angular size is only a few arcseconds at low redshift (z ~ 0.1–0.3). Figure 1 gives an example of ...
... quasar and its host, and the small angular size of the host are the main limitations to a spectroscopic study. Quasar host galaxies are typically 2–3 magnitudes fainter than their central quasar. Their angular size is only a few arcseconds at low redshift (z ~ 0.1–0.3). Figure 1 gives an example of ...
Galaxies - Wallkill Valley Regional High School
... - Range from dwarf to giant galaxies based on number of stars ...
... - Range from dwarf to giant galaxies based on number of stars ...
Deep Space Objects
... Ridiculously big stars may collapse with so much force that they actually tear a hole in the ‘stuff’ that space and time are made of (a ‘fabric’ called space-time), creating a deadly vortex that almost nothing – usually not even light – can escape. This is known as a black hole. One scientist once l ...
... Ridiculously big stars may collapse with so much force that they actually tear a hole in the ‘stuff’ that space and time are made of (a ‘fabric’ called space-time), creating a deadly vortex that almost nothing – usually not even light – can escape. This is known as a black hole. One scientist once l ...
ppt - Case Western Reserve University
... • The merger product is the only cosmological object that will be observable to future astronomers in 100 billion years • Collision will occur during the lifetime of the sun • The night sky will change • Simulated with an N-body/hydrodynamic code (Cox & Loeb 2007) • The only paper of mine that has a ...
... • The merger product is the only cosmological object that will be observable to future astronomers in 100 billion years • Collision will occur during the lifetime of the sun • The night sky will change • Simulated with an N-body/hydrodynamic code (Cox & Loeb 2007) • The only paper of mine that has a ...
Ch. 25 - UTK Department of Physics and Astronomy
... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
... the use of instructors in teaching their courses and assessing student learning. Dissemination or sale of any part of this work (including on the World Wide Web) will destroy the integrity of the work and is not permitted. The work and materials from it should never be made available to students exc ...
3rd EXAM VERSION A key - Department of Physics and Astronomy
... in the vicinity, it becomes dormant until another galaxy happens to pass nearby. C. The continual infall of material causes the mass of the black hole to grow until it explodes, resulting in a supernova. D. The immense radiation output from the quasar carries away energy. The mass of the black hole ...
... in the vicinity, it becomes dormant until another galaxy happens to pass nearby. C. The continual infall of material causes the mass of the black hole to grow until it explodes, resulting in a supernova. D. The immense radiation output from the quasar carries away energy. The mass of the black hole ...
Great Migrations & other natural history tales
... 2. Prominence of spiral arms, arm-interarm contrast (increases) 3. Visibility and number of population I objects such as: H II regions, OB associations, dark lanes of dust (increases) 4. Pitch angle (openness) of spiral arms ...
... 2. Prominence of spiral arms, arm-interarm contrast (increases) 3. Visibility and number of population I objects such as: H II regions, OB associations, dark lanes of dust (increases) 4. Pitch angle (openness) of spiral arms ...
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.