The Search for the Earliest Galaxies
... where small objects merged to form larger ones through collision and agglomeration. The findings from the HUDF09 survey support this hierarchical model of galaxy assembly. Still, there is a big mystery that remains unsolved. Current galaxy counts in the era between 400 million and 900 million years ...
... where small objects merged to form larger ones through collision and agglomeration. The findings from the HUDF09 survey support this hierarchical model of galaxy assembly. Still, there is a big mystery that remains unsolved. Current galaxy counts in the era between 400 million and 900 million years ...
star-formation rate
... q is the ratio of the mass in metals, which is produced by a stellar population and then returned into the ISM, and the initial total mass of the population. The yield y = q/α is defined as the ratio of the mass in metals that is produced by a stellar population and returned into the ISM, and the ma ...
... q is the ratio of the mass in metals, which is produced by a stellar population and then returned into the ISM, and the initial total mass of the population. The yield y = q/α is defined as the ratio of the mass in metals that is produced by a stellar population and returned into the ISM, and the ma ...
Chapter 9 / Adobe Acrobat Document
... to those aboard the shuttle—seven astronauts died during the Challenger launch disaster and another seven astronauts died when Columbia broke up on re-entry. 28. Hubble and Humason’s distance-redshift relationship: the universe’s expansion has been confirmed by observations at very large distances a ...
... to those aboard the shuttle—seven astronauts died during the Challenger launch disaster and another seven astronauts died when Columbia broke up on re-entry. 28. Hubble and Humason’s distance-redshift relationship: the universe’s expansion has been confirmed by observations at very large distances a ...
Astronomy Chapter 17 – Galaxies A. Main Ideas 1. Discovering
... ⇒ A Seyfert galaxy is a spiral galaxy whose nucleus is abnormally luminous. The core luminosity of a Seyfert galaxy is immense, amounting to the entire radiation output of the Milky Way, but coming from a region less than one light-year across • Quasars ⇒ Quasars are extremely luminous, extremely di ...
... ⇒ A Seyfert galaxy is a spiral galaxy whose nucleus is abnormally luminous. The core luminosity of a Seyfert galaxy is immense, amounting to the entire radiation output of the Milky Way, but coming from a region less than one light-year across • Quasars ⇒ Quasars are extremely luminous, extremely di ...
Lecture Notes
... cannot be independently calculated. (In this sense, it is a model, not a theory) 2. The model does not describe the gravitational interaction. 3. In its basic form it predicts neutrinos to have zero mass, which astronomical (and, much later, particle-physics) experiments have shown to be incorrect 4 ...
... cannot be independently calculated. (In this sense, it is a model, not a theory) 2. The model does not describe the gravitational interaction. 3. In its basic form it predicts neutrinos to have zero mass, which astronomical (and, much later, particle-physics) experiments have shown to be incorrect 4 ...
What kind of stuff
... feature called bar. • Bars are found in ¾ of spirals and are thought to arise from instabilities • It is unclear exactly why not all spiral galaxies are barred… ...
... feature called bar. • Bars are found in ¾ of spirals and are thought to arise from instabilities • It is unclear exactly why not all spiral galaxies are barred… ...
Lecture2 - UCSB Physics
... feature called bar. • Bars are found in ¾ of spirals and are thought to arise from instabilities • It is unclear exactly why not all spiral galaxies are barred… ...
... feature called bar. • Bars are found in ¾ of spirals and are thought to arise from instabilities • It is unclear exactly why not all spiral galaxies are barred… ...
12/08/14-- Student ID ______ TA Name
... c. supermassive black holes at centers of galaxies and the rapid motion of stars close to them d. observations of distant galaxies and then comparisons with nearby galaxies 32. It is ironic that the observations of RR Lyrae stars in globular clusters (1920’s), with the goal of disproving that the Mi ...
... c. supermassive black holes at centers of galaxies and the rapid motion of stars close to them d. observations of distant galaxies and then comparisons with nearby galaxies 32. It is ironic that the observations of RR Lyrae stars in globular clusters (1920’s), with the goal of disproving that the Mi ...
Staring Back to Cosmic Dawn - UC-HiPACC
... The Case of the Chaotic Blue Galaxies Ever since Hubble’s first spectacular images of distant galaxies, an enduring puzzle has been why early starforming galaxies look much more irregular and jumbled than nearby blue galaxies. Nearby blue galaxies are relatively smooth. The most beautiful ones are e ...
... The Case of the Chaotic Blue Galaxies Ever since Hubble’s first spectacular images of distant galaxies, an enduring puzzle has been why early starforming galaxies look much more irregular and jumbled than nearby blue galaxies. Nearby blue galaxies are relatively smooth. The most beautiful ones are e ...
Determining Distances to Other Galaxies
... the sample of galaxies studied. Some key results: •The Local Group is the only sample that includes a significant number of very faint galaxies. Of the ~35 galaxies in the Local Group, only the 3 brightest (M31, MW and M33) are spirals, the remainder are equally divided between irregular and dwarf e ...
... the sample of galaxies studied. Some key results: •The Local Group is the only sample that includes a significant number of very faint galaxies. Of the ~35 galaxies in the Local Group, only the 3 brightest (M31, MW and M33) are spirals, the remainder are equally divided between irregular and dwarf e ...
Galaxy alignment within dark matter halos
... the DM outer halo than the early-accreted counterparts. Formation time seems useless for ‘galaxy color’, why? (Environment is more important, recycle, quenching) However, due to strong tidal stripping in N-body simulation at halo center, there is no ‘orphan’ galaxies which should be red and carr ...
... the DM outer halo than the early-accreted counterparts. Formation time seems useless for ‘galaxy color’, why? (Environment is more important, recycle, quenching) However, due to strong tidal stripping in N-body simulation at halo center, there is no ‘orphan’ galaxies which should be red and carr ...
Galaxy5
... • The galactic fragments had already begun to form stars has they merged together to form the Galaxy. These stars retained their orbits and made the halo of the Galaxy. • The gas collided and sunk to the center. The Milky Way was built up piece-meal in this fashion. • Today, galaxy interactions bet ...
... • The galactic fragments had already begun to form stars has they merged together to form the Galaxy. These stars retained their orbits and made the halo of the Galaxy. • The gas collided and sunk to the center. The Milky Way was built up piece-meal in this fashion. • Today, galaxy interactions bet ...
File
... (arms), usually a central bulge + dust are present as well. SB = barred-spiral galaxies -- are similar to spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular gal ...
... (arms), usually a central bulge + dust are present as well. SB = barred-spiral galaxies -- are similar to spirals, but with the presence of a bar in the central regions. E = elliptical galaxies -- galaxies with smooth light distributions, biaxial profiles. Round to oval in shape. Irr = irregular gal ...
Star formation in galaxies over the last 10 billion
... measured in the lab: They are “redshifted”. This is because distant galaxies move away from us (“Doppler effect”, expansion of the Universe). wavelength ...
... measured in the lab: They are “redshifted”. This is because distant galaxies move away from us (“Doppler effect”, expansion of the Universe). wavelength ...
STEPHAN`S QUINTET
... Stephan's Quintet in the constellation Pegasus is al grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group was discovered by Édouard Stephan in 1877 at Marseilles Observatory. These galaxies are of interest because of their violent collisions. Four of ...
... Stephan's Quintet in the constellation Pegasus is al grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group was discovered by Édouard Stephan in 1877 at Marseilles Observatory. These galaxies are of interest because of their violent collisions. Four of ...
3rd EXAM VERSION A key - Department of Physics and Astronomy
... D. black holes in binary stars systems, where matter pulled from the companion star forms a hot accretion disk around the black hole 29. In the expansion of the universe, the expansion takes place A. only between objects separated by a vacuum; as a result, our bodies do not expand but the Earth-Moo ...
... D. black holes in binary stars systems, where matter pulled from the companion star forms a hot accretion disk around the black hole 29. In the expansion of the universe, the expansion takes place A. only between objects separated by a vacuum; as a result, our bodies do not expand but the Earth-Moo ...
Gugus Bintang [Compatibility Mode]
... we can determine the distance to the cluster by using several giant stars in the cluster to get its distance. 3. Cepheid Variables: By measuring the period of a cepheid variable, we can use the period-luminosity relationship to get the luminosity. Then by measuring the brightness, we can determine t ...
... we can determine the distance to the cluster by using several giant stars in the cluster to get its distance. 3. Cepheid Variables: By measuring the period of a cepheid variable, we can use the period-luminosity relationship to get the luminosity. Then by measuring the brightness, we can determine t ...
Test #4
... 25. Which of the following would not be useful in determining the distance to another galaxy? a) parallax, b) Cepheid variables, c) the sizes of HII regions, d) the brightness of a supernova 26. The radio emission from radio galaxies and quasars is due to a) thermal emission, b) blackbody radiation, ...
... 25. Which of the following would not be useful in determining the distance to another galaxy? a) parallax, b) Cepheid variables, c) the sizes of HII regions, d) the brightness of a supernova 26. The radio emission from radio galaxies and quasars is due to a) thermal emission, b) blackbody radiation, ...
This document was created for people who do not have access to
... We begin at the Wilkinson Microwave Anisotropy Probe (WMAP) orbiting one million miles above the Earth, and travel outward through our solar system, into our local stellar neighborhood, and then around the disk of our Milky Way galaxy. As we leave the Milky Way, we find ourselves in a universe fille ...
... We begin at the Wilkinson Microwave Anisotropy Probe (WMAP) orbiting one million miles above the Earth, and travel outward through our solar system, into our local stellar neighborhood, and then around the disk of our Milky Way galaxy. As we leave the Milky Way, we find ourselves in a universe fille ...
Chapter 15, Galaxies
... Use independent measurements to check the luminosity of the standard candle. For example, we can use parallax measurements of the distance to main sequence stars to check measurements of distance using main-sequence fitting. If we do this for a few of them, then we can verify the assumption that the ...
... Use independent measurements to check the luminosity of the standard candle. For example, we can use parallax measurements of the distance to main sequence stars to check measurements of distance using main-sequence fitting. If we do this for a few of them, then we can verify the assumption that the ...
Section9 - University of Chicago
... by observing radio sources. In this case the galaxies found are the hosts of active radio emitting jets – distant analogs of objects like Centaurus A Cygnus A and M87 in the nearby universe. ...
... by observing radio sources. In this case the galaxies found are the hosts of active radio emitting jets – distant analogs of objects like Centaurus A Cygnus A and M87 in the nearby universe. ...
15-3 Notes: Galaxies
... Irregular galaxies are galaxies that have no definite shape. The smallest irregular galaxies have only about 10 million stars. The largest irregular galaxies can contain several billion stars. Galaxies contain not only stars and planetary systems. Large features, such as gas clouds and star clusters ...
... Irregular galaxies are galaxies that have no definite shape. The smallest irregular galaxies have only about 10 million stars. The largest irregular galaxies can contain several billion stars. Galaxies contain not only stars and planetary systems. Large features, such as gas clouds and star clusters ...
Stellar Lives (continued). Galaxies.
... The CNO cycle is the chain of reactions that leads to hydrogen fusion in high-mass stars. The escalated fusion rate of the CNO cycle produces many more photons than in low-mass stars. The photons have no mass, but carry momentum. They transfer the momentum to anything the run into. The result is rad ...
... The CNO cycle is the chain of reactions that leads to hydrogen fusion in high-mass stars. The escalated fusion rate of the CNO cycle produces many more photons than in low-mass stars. The photons have no mass, but carry momentum. They transfer the momentum to anything the run into. The result is rad ...
Correct answers shown in boldface. Be sure to write your name and
... b. they did not have photographic plates to detect very faint stars c. their telescopes were too small to see the whole system d. they needed infrared detectors e. they did not realize how interstellar dust cut off their view 33. When clumps of gas first collapse into young stars, their arrival on t ...
... b. they did not have photographic plates to detect very faint stars c. their telescopes were too small to see the whole system d. they needed infrared detectors e. they did not realize how interstellar dust cut off their view 33. When clumps of gas first collapse into young stars, their arrival on t ...
HIERARCHICAL GALAXY ASSEMBLY AND ITS MANIFESTATIONS
... gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
... gas, which turns into stars The formation mechanism is going to be imprinted in the bulge distribution. The distribution of bulge types seem to indicate that secular and classical channels are well separated. ...
Pea galaxy
A Pea galaxy, also referred to as a Pea or Green Pea, might be a type of Luminous Blue Compact Galaxy which is undergoing very high rates of star formation. Pea galaxies are so-named because of their small size and greenish appearance in the images taken by the Sloan Digital Sky Survey (SDSS).Pea Galaxies were first discovered in 2007 by the volunteer users within the forum section of the online astronomy project Galaxy Zoo (GZ).