Ay 1 – Homework #6
... C. They are mostly dark-matter dominated. D. Over-densities created by spiral density waves (i.e. spiral arms) are necessary to create sites of star formation. 5. What is the physical significance of the Tully-Fisher relation for spiral galaxies? A. It implies a link between the dark matter halos of ...
... C. They are mostly dark-matter dominated. D. Over-densities created by spiral density waves (i.e. spiral arms) are necessary to create sites of star formation. 5. What is the physical significance of the Tully-Fisher relation for spiral galaxies? A. It implies a link between the dark matter halos of ...
1 - WordPress.com
... Spiral, Elliptical (like a football or cigar), Irregular 4. What characteristics do all galaxies share? The have millions of stars, dust and gas – all held together by strong gravity forces 5. What do we call stars that are bunched together in part of a galaxy? A star cluster 6. Even if humans had a ...
... Spiral, Elliptical (like a football or cigar), Irregular 4. What characteristics do all galaxies share? The have millions of stars, dust and gas – all held together by strong gravity forces 5. What do we call stars that are bunched together in part of a galaxy? A star cluster 6. Even if humans had a ...
Chapter 30.3 Star Groups
... the center and have no spiral arms. • Irregular Galaxies: has no particular shapes. Have low total masses and are fairly rich in dust and gas. More rare than other galaxies. ...
... the center and have no spiral arms. • Irregular Galaxies: has no particular shapes. Have low total masses and are fairly rich in dust and gas. More rare than other galaxies. ...
Section 28.2 - CPO Science
... that contains young to middle-aged stars, along with gas and dust. ...
... that contains young to middle-aged stars, along with gas and dust. ...
The Deep Structure of Dark Matter
... We need to reach down to void galaxies while retaining enough filaments, groups and clusters for intercomparisons. A full treatment takes us to a Hector survey of ~105 galaxies ultimately down to mass limit ≥ 109 M . 2-4m class telescopes, supported by all-sky HI and photometric surveys, ...
... We need to reach down to void galaxies while retaining enough filaments, groups and clusters for intercomparisons. A full treatment takes us to a Hector survey of ~105 galaxies ultimately down to mass limit ≥ 109 M . 2-4m class telescopes, supported by all-sky HI and photometric surveys, ...
Galaxies and the Universe
... Many football shaped, but others are round Some large ( so large that several galaxies the size of the Milky Way would fit inside) and some small ...
... Many football shaped, but others are round Some large ( so large that several galaxies the size of the Milky Way would fit inside) and some small ...
Document
... 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! ...
HW13_Answers
... 1) List the three main components of a disk galaxy and describe the difference between the stars that are present in the components. The three main components are the disk, the bulge and the halo. The disk has stars, gas and dust. It is the location where star formation is occurring. Because of this ...
... 1) List the three main components of a disk galaxy and describe the difference between the stars that are present in the components. The three main components are the disk, the bulge and the halo. The disk has stars, gas and dust. It is the location where star formation is occurring. Because of this ...
AGN
... •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 ...
Intro to Astronomy Power Point
... Types of Galaxies III. Irregulars Irregular galaxies lack any specific form and contain stars, gas and dust generally associated with a youth. The irregular galaxy at right is the Large Magellanic Cloud, a satellite of the Milky Way located about 180,000 light years from the sun. The LMC is about 6 ...
... Types of Galaxies III. Irregulars Irregular galaxies lack any specific form and contain stars, gas and dust generally associated with a youth. The irregular galaxy at right is the Large Magellanic Cloud, a satellite of the Milky Way located about 180,000 light years from the sun. The LMC is about 6 ...
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 ...
Lecture #2
... (near-IR, in this case) but there’s no guarantee that the morphological type will be the same in the visible (here Hubble sequence is defined) and the other wavelengths. On the contrary, there are sometimes bars and rings which are revealed only in the UV, IR, or radio wavelengths. ...
... (near-IR, in this case) but there’s no guarantee that the morphological type will be the same in the visible (here Hubble sequence is defined) and the other wavelengths. On the contrary, there are sometimes bars and rings which are revealed only in the UV, IR, or radio wavelengths. ...
After Dark M S
... Galaxies do not just come in ones or two’s. Sometimes they occur in groups that contain tens, hundreds, and even thousands of galaxies. What do we know about galaxy clusters and how they were formed? ...
... Galaxies do not just come in ones or two’s. Sometimes they occur in groups that contain tens, hundreds, and even thousands of galaxies. What do we know about galaxy clusters and how they were formed? ...
Great Migrations & other natural history tales
... telescopes, spiral galaxies looked a lot like blurry, perhaps gaseous objects. Hence the idea that they’re much smaller parts of the Milky Way. ...
... telescopes, spiral galaxies looked a lot like blurry, perhaps gaseous objects. Hence the idea that they’re much smaller parts of the Milky Way. ...
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. ...
CH 15 SEC 4 STAR SYSTEMS AND GALAXIES
... KEY ASTRONOMERS STUDY OBJECTS AS CLOSE AS THE MOON AND AS FAR AWAY AS QUASARS QUASARS- ARE THE MOST DISTANT OBJECTS IN THE ...
... KEY ASTRONOMERS STUDY OBJECTS AS CLOSE AS THE MOON AND AS FAR AWAY AS QUASARS QUASARS- ARE THE MOST DISTANT OBJECTS IN THE ...
Rich and Poor Galaxy Clusters
... a) Some galaxies have long "tails" of stars. b) Rich, regular clusters are dominated by central giant ellipticals. c) Both spiral and elliptical galaxies are seen at very high redshift. d) Some galaxies seems to be undergoing bursts of star formation. ...
... a) Some galaxies have long "tails" of stars. b) Rich, regular clusters are dominated by central giant ellipticals. c) Both spiral and elliptical galaxies are seen at very high redshift. d) Some galaxies seems to be undergoing bursts of star formation. ...
The Milky Way - Zumbroclassroom
... a ______ of _______. _________ was the first person to suggest that the Milky Way is actually made up of millions of distant stars. It was proven _______ years later when _________ observed this band of stars through his telescope. The Milky Way, like all other galaxies, is a complex system of _____ ...
... a ______ of _______. _________ was the first person to suggest that the Milky Way is actually made up of millions of distant stars. It was proven _______ years later when _________ observed this band of stars through his telescope. The Milky Way, like all other galaxies, is a complex system of _____ ...
The Universe – Powerpoint
... Edwin Hubble was an American Astronomer who helped in creating the theory about extragalactic astronomy. He also provided evidence that many things back then called Nebulae were actually galaxies past the Milky Way. ...
... Edwin Hubble was an American Astronomer who helped in creating the theory about extragalactic astronomy. He also provided evidence that many things back then called Nebulae were actually galaxies past the Milky Way. ...
2. Universe and galaxies
... • II. Most common type • III. Contains only old stars and very little dust and gas. ...
... • II. Most common type • III. Contains only old stars and very little dust and gas. ...
AY1 Homework for Quiz 3: Spring 2017
... ___ gas clouds being ejected from the center of the Galaxy at escape velocity ___ orbits of stars near the center of the Galaxy ___ the regular disappearance of stars near the center of the Gal ...
... ___ gas clouds being ejected from the center of the Galaxy at escape velocity ___ orbits of stars near the center of the Galaxy ___ the regular disappearance of stars near the center of the Gal ...
Class web page
... Stellar death: In 1987, the brightest supernova in recent history occurred in the Large Magellanic Cloud, a companion galaxy to the Milky Way. At the center of the picture is an object central to the remains of the violent stellar explosion. ...
... Stellar death: In 1987, the brightest supernova in recent history occurred in the Large Magellanic Cloud, a companion galaxy to the Milky Way. At the center of the picture is an object central to the remains of the violent stellar explosion. ...
Slide 1
... Emit radio waves, IR, visible, X rays Most luminous objects (like 20 trillion suns) Larger & more massive than any known star Radiate light and radio waves at high rates May be whole galaxies in early stage of development, but so distant that we can’t see the galaxy itself. ...
... Emit radio waves, IR, visible, X rays Most luminous objects (like 20 trillion suns) Larger & more massive than any known star Radiate light and radio waves at high rates May be whole galaxies in early stage of development, but so distant that we can’t see the galaxy itself. ...
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.