Chapter 12 Quiz, Nov. 28, 2012, Astro 162, Section 4 12-1
... 12-32. Why are the spiral arms of our Galaxy brighter than the regions between them? The O and B stars formed in the spiral arms explode as supernovae before they emerge from the arms. Therefore, these stars are not found between the arms of spiral galaxies. 12-33. Describe the Sun’s motion through ...
... 12-32. Why are the spiral arms of our Galaxy brighter than the regions between them? The O and B stars formed in the spiral arms explode as supernovae before they emerge from the arms. Therefore, these stars are not found between the arms of spiral galaxies. 12-33. Describe the Sun’s motion through ...
Galaxies and Their Properties
... • Hubble proposed a scheme for classifying galaxies (the “tuning fork” diagram) in his 1936 book, The Realm of the Nebulae ...
... • Hubble proposed a scheme for classifying galaxies (the “tuning fork” diagram) in his 1936 book, The Realm of the Nebulae ...
Galaxies - cloudfront.net
... billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, and irregular galaxies. • Spiral galaxies spin and appear as a rotating disk of stars and dust, with a bulge in the middle. Several spiral arms reach outward from the central bulge like the arms of a pin ...
... billions of stars. Galaxies are divided into three types according to shape: spiral, elliptical, and irregular galaxies. • Spiral galaxies spin and appear as a rotating disk of stars and dust, with a bulge in the middle. Several spiral arms reach outward from the central bulge like the arms of a pin ...
Introduction to Galaxies - West Jefferson Local Schools
... which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar radio source, indicates that some incredibly powerful mechanism ...
... which Mkn 205 is 14 times farther away at a distance of 1 billion light year. The very distant quasar is nearly as bright as the much closer galaxy. The extraordinary brightness of quasars, which is a blending of the term quasi-stellar radio source, indicates that some incredibly powerful mechanism ...
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 ...
The Milky Way is on a collision course with its neighbor, the
... our galaxy experiences its gravitational dance with Andromeda. Because only a small fraction of a galaxy’s mass ends up in tidal tails, it is more likely the Sun will go for a much less dramatic ride. Most of the stars in merging galaxies remain relatively close to their host galaxies. The chance of ...
... our galaxy experiences its gravitational dance with Andromeda. Because only a small fraction of a galaxy’s mass ends up in tidal tails, it is more likely the Sun will go for a much less dramatic ride. Most of the stars in merging galaxies remain relatively close to their host galaxies. The chance of ...
The Milky Way
... The only way to explain the rotation curve of our galaxy is to say that there is lots and lots of mass that is not emitting light. The halo of our galaxy must be full of it. The halo outweighs the disk by a factor of 10. As far as we can tell, this mass doesn’t emit any ...
... The only way to explain the rotation curve of our galaxy is to say that there is lots and lots of mass that is not emitting light. The halo of our galaxy must be full of it. The halo outweighs the disk by a factor of 10. As far as we can tell, this mass doesn’t emit any ...
Elliptical galaxies
... weaker more extended emission. A twist between both images of the same galaxy are apparent (the orientation in the sky is the same in ...
... weaker more extended emission. A twist between both images of the same galaxy are apparent (the orientation in the sky is the same in ...
Here
... Conclusion: It is not possible to reproduce the observed distribution if all galaxies are either prolate or oblate axisymmetrical ellipsoids. ...
... Conclusion: It is not possible to reproduce the observed distribution if all galaxies are either prolate or oblate axisymmetrical ellipsoids. ...
Our Local Group of Galaxies
... • Finding such objects is very difficult as you need deep photometry (to get beyond the Galaxy) over effectively the entire sky - a task for LSST probably. ...
... • Finding such objects is very difficult as you need deep photometry (to get beyond the Galaxy) over effectively the entire sky - a task for LSST probably. ...
M101: The Pinwheel Galaxy
... students’ misconceptions. Ask students to volunteer their ideas, or collect their papers, compile a list of misconceptions, and discuss them with the class. Ask students to review the galaxy image on the front of the “M101: The Pinwheel Galaxy” lithograph and write down three questions they have abo ...
... students’ misconceptions. Ask students to volunteer their ideas, or collect their papers, compile a list of misconceptions, and discuss them with the class. Ask students to review the galaxy image on the front of the “M101: The Pinwheel Galaxy” lithograph and write down three questions they have abo ...
The Hubble Ultra Deep Field Project Overview
... In this exercise you will consider a variety of galaxies over a range of redshifts in order to derive any morphological trends which may arise in the HUDF, over cosmic timescales. Though it is a far from perfect classification system, the morphology (or in other words, “the way galaxies look”) of a ...
... In this exercise you will consider a variety of galaxies over a range of redshifts in order to derive any morphological trends which may arise in the HUDF, over cosmic timescales. Though it is a far from perfect classification system, the morphology (or in other words, “the way galaxies look”) of a ...
Twitter Feed ITSO Symposium 2017
... The interstellar medium (ISM) metallicity provide a powerful constrain on the complex interplay of star formation and the galactic inflow/outflow, in understanding the factors affecting galaxy evolution. Disentangling the effect of internal (stellar mass) and external (environment) processes on the ...
... The interstellar medium (ISM) metallicity provide a powerful constrain on the complex interplay of star formation and the galactic inflow/outflow, in understanding the factors affecting galaxy evolution. Disentangling the effect of internal (stellar mass) and external (environment) processes on the ...
Galaxies
... • Astronomers now have decided that the morphology classification should consist of only two types of galaxies: the spiral and the elliptical. • Barred spirals are a subclass of spirals. Irregulars may be either spiral or barred spiral. ...
... • Astronomers now have decided that the morphology classification should consist of only two types of galaxies: the spiral and the elliptical. • Barred spirals are a subclass of spirals. Irregulars may be either spiral or barred spiral. ...
Finnish Centre for Astronomy with ESO
... a world leading astronomical research and technology organization, with 15 member states, headquarters in Garching, Germany, and three world-class observatories in Chile. Finnish Centre for Astronomy with ESO (FINCA) is a national research institute for astronomical and astrophysical research in Fin ...
... a world leading astronomical research and technology organization, with 15 member states, headquarters in Garching, Germany, and three world-class observatories in Chile. Finnish Centre for Astronomy with ESO (FINCA) is a national research institute for astronomical and astrophysical research in Fin ...
powerpoint
... • In the centers of clusters you tend to find Giant Elliptical Galaxies that can be 10-100 times more massive than our galaxy. • Spirals tend to hang on their own – but often have small satellite galaxies. • The smallest galaxies are dwarf ellipticals. • Elliptical galaxies don’t have much dust or g ...
... • In the centers of clusters you tend to find Giant Elliptical Galaxies that can be 10-100 times more massive than our galaxy. • Spirals tend to hang on their own – but often have small satellite galaxies. • The smallest galaxies are dwarf ellipticals. • Elliptical galaxies don’t have much dust or g ...
PH607lec12-3gal1
... Lens – bulge/disc, no arms, little dust S01, S02, S03 – strength of dust absorption, S01 has none SB01, SB02, SB03 – prominence of bar Spirals (77%)– normal (S or SA) or barred (SB) Sa – Sc , ragged Sd depending on bulge/disk ratio, tightness of spiral arms, gas content, bright young st ...
... Lens – bulge/disc, no arms, little dust S01, S02, S03 – strength of dust absorption, S01 has none SB01, SB02, SB03 – prominence of bar Spirals (77%)– normal (S or SA) or barred (SB) Sa – Sc , ragged Sd depending on bulge/disk ratio, tightness of spiral arms, gas content, bright young st ...
Student Reading
... The diameter of the Milky Way is about 100,000 light-years. A light-year is the distance light travels in one year. To appreciate how far this is, consider that light can travel from the Sun to Earth in about eight minutes, and from the Sun to distant Pluto in about five and a half hours. So the Sun ...
... The diameter of the Milky Way is about 100,000 light-years. A light-year is the distance light travels in one year. To appreciate how far this is, consider that light can travel from the Sun to Earth in about eight minutes, and from the Sun to distant Pluto in about five and a half hours. So the Sun ...
Common BH/SFR Evolution
... • Critical stage of BH-galaxy connection. • Occurs when galaxies form most of their stars. • Can represent up to 50% of matter accretion onto the central black hole. ...
... • Critical stage of BH-galaxy connection. • Occurs when galaxies form most of their stars. • Can represent up to 50% of matter accretion onto the central black hole. ...
The Co-evolution of Galaxies and their Supermassive Black Holes
... Revolution in in our understanding of galaxy formation: 1) All galaxy bulges contain supermassive black holes 2) The mass of the black hole is tightly correlated with the mass of the bulge. ...
... Revolution in in our understanding of galaxy formation: 1) All galaxy bulges contain supermassive black holes 2) The mass of the black hole is tightly correlated with the mass of the bulge. ...
The Milky Way Galaxy
... galaxy is to say that there is lots and lots of mass that is not emitting light. The halo of our galaxy must be full of it. The halo outweighs the disk by a factor of 10. As far as we can tell, this mass doesn’t emit any ...
... galaxy is to say that there is lots and lots of mass that is not emitting light. The halo of our galaxy must be full of it. The halo outweighs the disk by a factor of 10. As far as we can tell, this mass doesn’t emit any ...
M104: The Sombrero Galaxy
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... to the forma=on of a rapidly rota=ng neutron star because of conserva=on of angular momentum (if the Sun was compressed into a radius of 10 km it would rotate at 1000 =mes per second). ...
... to the forma=on of a rapidly rota=ng neutron star because of conserva=on of angular momentum (if the Sun was compressed into a radius of 10 km it would rotate at 1000 =mes per second). ...
M104: The Sombrero Galaxy
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
ASPEN WORKSHOP 2003
... Haiman—End of the Dark Ages, Based on Existence of New High-Z Objects and Re-ionization Iff these quasars are not lensed [lensing is only likely if there are a large number of low-L quasars], Billion solar mass black hole at z=6.5 can just barely grow fast enough from 100Msun seed at z=15, at only 1 ...
... Haiman—End of the Dark Ages, Based on Existence of New High-Z Objects and Re-ionization Iff these quasars are not lensed [lensing is only likely if there are a large number of low-L quasars], Billion solar mass black hole at z=6.5 can just barely grow fast enough from 100Msun seed at z=15, at only 1 ...
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.