Lecture 10
... Seen at large redshift Emit strongly in X-rays Spectrum: power law (non-thermal), Synchrotron radiation: relativistic electrons spiraling in B-field • QSO model + unification scheme for Quasars, Blazars, and Radio galaxies • QSOs in the Universe: z > 0.3 => common in early Universe then died out ...
... Seen at large redshift Emit strongly in X-rays Spectrum: power law (non-thermal), Synchrotron radiation: relativistic electrons spiraling in B-field • QSO model + unification scheme for Quasars, Blazars, and Radio galaxies • QSOs in the Universe: z > 0.3 => common in early Universe then died out ...
Document
... Active galaxies There are many different kinds of AGN Quasars, Seyferts, Blazars, Liners, BL Lac, FR I, FR II etc. ...
... Active galaxies There are many different kinds of AGN Quasars, Seyferts, Blazars, Liners, BL Lac, FR I, FR II etc. ...
Lecture 8 - University of Sydney
... Active galaxies There are many different kinds of AGN Quasars, Seyferts, Blazars, Liners, BL Lac, FR I, FR II etc. ...
... Active galaxies There are many different kinds of AGN Quasars, Seyferts, Blazars, Liners, BL Lac, FR I, FR II etc. ...
BYOG: Build Your Own Galaxy
... contains old stars; but the arms winding through the disk contain dust, gas, and young stars. In a normal spiral galaxy, the arms, at least two in number, join smoothly with the central bulge. The Milky Way has four major spiral arms, named after the constellations that point to them: Perseus Arm, S ...
... contains old stars; but the arms winding through the disk contain dust, gas, and young stars. In a normal spiral galaxy, the arms, at least two in number, join smoothly with the central bulge. The Milky Way has four major spiral arms, named after the constellations that point to them: Perseus Arm, S ...
No Slide Title - Indiana State University
... • First one discovered in early 1970s Crab nebula (remnant of an A.D. 1054 supernova) ...
... • First one discovered in early 1970s Crab nebula (remnant of an A.D. 1054 supernova) ...
14 - Sitka School District
... gases in its center and expands. Once the remaining gases are used up it contracts to become a BLACK DWARF. SUPERGIANTS are formed when a huge star uses up the gases in its core. When the core of a supergiant collapses the outer part explodes and gets bright, this is known as a SUPERNOVA. o The supe ...
... gases in its center and expands. Once the remaining gases are used up it contracts to become a BLACK DWARF. SUPERGIANTS are formed when a huge star uses up the gases in its core. When the core of a supergiant collapses the outer part explodes and gets bright, this is known as a SUPERNOVA. o The supe ...
Universe, Galaxies, Solar System
... • Named for the spiral arms that are prominent (like a pinwheel). The arms are made of stars and dust. • Spiral Galaxies have a central bulge, a disk, a halo, and some may have a “bar” of stars passing through the center. These types of galaxies are called barred spirals. • Spiral galaxies are huge, ...
... • Named for the spiral arms that are prominent (like a pinwheel). The arms are made of stars and dust. • Spiral Galaxies have a central bulge, a disk, a halo, and some may have a “bar” of stars passing through the center. These types of galaxies are called barred spirals. • Spiral galaxies are huge, ...
Chapter 15 Normal and Active Galaxies
... progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in our own galaxy: disk, core, halo, bulge, spiral arms. ...
... progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in our own galaxy: disk, core, halo, bulge, spiral arms. ...
1apr
... Light than in optical light. The example shown to the left (NGC 4625) it typical; the bright whitish inner part defines the optical size of the galaxy, the bluish emission shows the greatly extended Ultraviolet emission (XUV). This XUV light is remarkable for two reason: 1) it directly shows the UV ...
... Light than in optical light. The example shown to the left (NGC 4625) it typical; the bright whitish inner part defines the optical size of the galaxy, the bluish emission shows the greatly extended Ultraviolet emission (XUV). This XUV light is remarkable for two reason: 1) it directly shows the UV ...
Irregular galaxies
... largest measured distance is from the Sun to Saturn at about 1 billion miles (886 million miles is actual distance). ...
... largest measured distance is from the Sun to Saturn at about 1 billion miles (886 million miles is actual distance). ...
Chapter 8, Astronomy Lesson 5, Galaxies and Beyond Objectives
... What is the name of the galaxy in which Earth is located? What type of galaxy is it? _________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ _____________ ...
... What is the name of the galaxy in which Earth is located? What type of galaxy is it? _________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ _____________ ...
PX269 Galaxies - University of Warwick
... the Milky Way, nebulous stars, but especially about four planets flying around the star of Jupiter at unequal intervals and periods with wonderful swiftness; which, unknown by anyone until this day, the first author detected recently and decided to name MEDICEAN STARS ...
... the Milky Way, nebulous stars, but especially about four planets flying around the star of Jupiter at unequal intervals and periods with wonderful swiftness; which, unknown by anyone until this day, the first author detected recently and decided to name MEDICEAN STARS ...
Quasars and AGN
... that the QSO must be less than 200 AU. • QSOs must be small and massive to produce a large amount of energy and vary over a short time period. ...
... that the QSO must be less than 200 AU. • QSOs must be small and massive to produce a large amount of energy and vary over a short time period. ...
Types of Galaxies - BirdBrain Science
... to catch a ball that sort of wobbled out of its path through the air? When you get your hands on it, you can see that it is not very round. Irregular galaxies do not have a shape like a circle or football. They look like dust in the wind, or like someone spilled stars into a part of space. Maybe the ...
... to catch a ball that sort of wobbled out of its path through the air? When you get your hands on it, you can see that it is not very round. Irregular galaxies do not have a shape like a circle or football. They look like dust in the wind, or like someone spilled stars into a part of space. Maybe the ...
Nuclear Stellar Populations in Bright Spiral Galaxies
... All non-quiescent galaxies were late-type spirals (Sbc or later). 6 of 8 non-quiescent galaxies are barred, suggesting that bars caused gas infall that triggered star formation. Many quiescent galaxies, however, are also barred, so not all barred galaxies exhibit recent nuclear star formation ac ...
... All non-quiescent galaxies were late-type spirals (Sbc or later). 6 of 8 non-quiescent galaxies are barred, suggesting that bars caused gas infall that triggered star formation. Many quiescent galaxies, however, are also barred, so not all barred galaxies exhibit recent nuclear star formation ac ...
Introduction to Active Galactic Nuclei
... •Strong non-thermal emission ; polarized emission •Compact radio core •Extended, linear radio structures (jets+hotspots) •X-ray, g-ray, and TeV-emission In some luminous AGN (quasars) the radiation from a region comparable to the solar system can be several hundred times brighter than the whole gala ...
... •Strong non-thermal emission ; polarized emission •Compact radio core •Extended, linear radio structures (jets+hotspots) •X-ray, g-ray, and TeV-emission In some luminous AGN (quasars) the radiation from a region comparable to the solar system can be several hundred times brighter than the whole gala ...
Galaxies Quiz – Study Guide KEY You will be given a set of images
... a. Where do you find NEW stars in spiral galaxies? _______ARMS___ b. Which type of galaxy has the most NEW stars? ___IRREGULAR____ c. Which type of galaxy has the most OLD stars? __ELLIPTICAL__ d. Which type of galaxy has the most dust and gas? ___IRREGULAR__ e. Which type of galaxy is the largest ( ...
... a. Where do you find NEW stars in spiral galaxies? _______ARMS___ b. Which type of galaxy has the most NEW stars? ___IRREGULAR____ c. Which type of galaxy has the most OLD stars? __ELLIPTICAL__ d. Which type of galaxy has the most dust and gas? ___IRREGULAR__ e. Which type of galaxy is the largest ( ...
galaxies, galaxies, galaxies!
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
Dark Matter
... structures in the Universe held together by gravity, scientists can conclude that most of the matter in the entire Universe is invisible. This invisible stuff is called ‘dark matter’. There is currently much ongoing research by scientists attempting to discover exactly what dark matter is, and what ...
... structures in the Universe held together by gravity, scientists can conclude that most of the matter in the entire Universe is invisible. This invisible stuff is called ‘dark matter’. There is currently much ongoing research by scientists attempting to discover exactly what dark matter is, and what ...
Astronomy Galaxies Quiz – Study Guide You will be given a set of
... a. Where do you find NEW stars in spiral galaxies? ________________ b. Which type of galaxy has the most NEW stars? ________________ c. Which type of galaxy has the most OLD stars? _______________ d. Which type of galaxy has the most dust and gas? _________________ e. Which type of galaxy is the lar ...
... a. Where do you find NEW stars in spiral galaxies? ________________ b. Which type of galaxy has the most NEW stars? ________________ c. Which type of galaxy has the most OLD stars? _______________ d. Which type of galaxy has the most dust and gas? _________________ e. Which type of galaxy is the lar ...
Galaxy Classification
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
... Elliptical galaxies are affectionately called “E” galaxies. They can be extremely large and massive. This galaxy is 2 million light years across. The size of the Milky Way in comparison! ...
Document
... • Ellipticals – various kinds of ellipticity, from nearcircular E0 to highly oval and flat E7 (need to distinguish from edge-on view) – no disks, spiral ...
... • Ellipticals – various kinds of ellipticity, from nearcircular E0 to highly oval and flat E7 (need to distinguish from edge-on view) – no disks, spiral ...
Seyfert galaxy
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material.Seen in visible light, most Seyfert galaxies look like normal spiral galaxies, but when studied under other wavelengths, it becomes clear that the luminosity of their cores is of comparable intensity to the luminosity of whole galaxies the size of the Milky Way.Seyfert galaxies are named after Carl Seyfert, who first described this class in 1943.