talk
... Baryonic fraction for NGC 3741 (within the extent of the gas disk) ~ 0.18 ► comparable to other galaxies with less extended HI disk No evidence for baryon loss (measured within the extent of gas disk) in faint dwarf galaxies (contradiction to simulations of galaxy formation !) To reconcile rot ...
... Baryonic fraction for NGC 3741 (within the extent of the gas disk) ~ 0.18 ► comparable to other galaxies with less extended HI disk No evidence for baryon loss (measured within the extent of gas disk) in faint dwarf galaxies (contradiction to simulations of galaxy formation !) To reconcile rot ...
The Milky Way Galaxy
... have more or less new star formation than spirals? Why? 1) ellipticals have more new star formation 2) ellipticals have less new star formation ...
... have more or less new star formation than spirals? Why? 1) ellipticals have more new star formation 2) ellipticals have less new star formation ...
Exploring The Universe
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Ea ...
... • Quasars may be infant galaxies. • In 1960, a faint object was matched with a strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Ea ...
Curriculum Vitae - Centre for Astrophysics and Supercomputing
... • Statistical interpretation of spectroscopic and photometric galaxy surveys • The formation and evolution of galaxies, comparison between theory/models and observations • The connections between star formation and AGN • Chemical evolution and dust production in galaxies • Deep (sub-)millimeter surv ...
... • Statistical interpretation of spectroscopic and photometric galaxy surveys • The formation and evolution of galaxies, comparison between theory/models and observations • The connections between star formation and AGN • Chemical evolution and dust production in galaxies • Deep (sub-)millimeter surv ...
The Sun, Stars, and Beyond
... • Irregularly shaped galaxies also exist, though fewer in number. • A galaxy’s shape is determined by its rate of spin, and if it has been subject to any collisions or mergers. • These all contain 100 billion stars or more, and there are 100 billion galaxies out there! ...
... • Irregularly shaped galaxies also exist, though fewer in number. • A galaxy’s shape is determined by its rate of spin, and if it has been subject to any collisions or mergers. • These all contain 100 billion stars or more, and there are 100 billion galaxies out there! ...
stars and galaxies – study guide
... 22. By using a tool called a spectroscope astronomers can identify the elements in a star. 23. On an H-R Diagram, stars are classified by temperature and absolute magnitude. 24. What is the next stage of the sun? Red Giant 25. An example of a winter constellation is Orion. 26. White dwarf stars are ...
... 22. By using a tool called a spectroscope astronomers can identify the elements in a star. 23. On an H-R Diagram, stars are classified by temperature and absolute magnitude. 24. What is the next stage of the sun? Red Giant 25. An example of a winter constellation is Orion. 26. White dwarf stars are ...
Slide 1
... YOU CAN CHOOSE TWO WAVELENGTHS (COLORS) WHICH FOCUS AT THE SAME PLACE IF YOU USE THREE LENSES YOU CAN CHOOSE THREE WAVELENGTHS THAT FOCUS AT THE SAME PLACE IN ANY MULTIPLE LENSE ARRANGEMENT YOU CAN CHOOSE AS MANY WAVELENGTHS WHICH FOCUS AT THE SAME PLACE AS LENSES THAT YOU USE. ...
... YOU CAN CHOOSE TWO WAVELENGTHS (COLORS) WHICH FOCUS AT THE SAME PLACE IF YOU USE THREE LENSES YOU CAN CHOOSE THREE WAVELENGTHS THAT FOCUS AT THE SAME PLACE IN ANY MULTIPLE LENSE ARRANGEMENT YOU CAN CHOOSE AS MANY WAVELENGTHS WHICH FOCUS AT THE SAME PLACE AS LENSES THAT YOU USE. ...
OGT TYPE QUESTIONS
... Nuclear fusion is the process by which two or more nuclei with small masses (such as hydrogen) join together, or fuse, to form a larger, more massive nucleus (such as helium). During this process, a massive amount of energy and radioactive emissions (such as gamma rays) are produced. Combustion, and ...
... Nuclear fusion is the process by which two or more nuclei with small masses (such as hydrogen) join together, or fuse, to form a larger, more massive nucleus (such as helium). During this process, a massive amount of energy and radioactive emissions (such as gamma rays) are produced. Combustion, and ...
REVIEW: STAR`S TEST
... What force causes particles of stellar dust to become attracted to each other ? _GRAVITY__ The most widely held astronomical theory about the origin of the universe is the BIG BANG theory. The fact that the spectra of stars are shifted towards the red suggests that the stars are moving _AWAY____ Dia ...
... What force causes particles of stellar dust to become attracted to each other ? _GRAVITY__ The most widely held astronomical theory about the origin of the universe is the BIG BANG theory. The fact that the spectra of stars are shifted towards the red suggests that the stars are moving _AWAY____ Dia ...
Maui Stargazing April Observing List DEEP SPACE OBJECTS
... ASTERISMS - In astronomy, an asterism is an informal pattern of stars recognized in the Earth's night sky. It may be part of an official constellation or it may be composed of stars from more than one constellation. CONSTELLATIONS - In modern astronomy, a constellation is a specific area of the cel ...
... ASTERISMS - In astronomy, an asterism is an informal pattern of stars recognized in the Earth's night sky. It may be part of an official constellation or it may be composed of stars from more than one constellation. CONSTELLATIONS - In modern astronomy, a constellation is a specific area of the cel ...
Astronomy Unit Test – Chapter 21
... 32. A group of stars that form patterns in the sky is called constellation. 33. To express the distance between the Milky Way galaxy and other galaxies, the most appropriate unit of measurement is the light year. 34. Which of the following properly sequences the life cycle of a massive star? Stellar ...
... 32. A group of stars that form patterns in the sky is called constellation. 33. To express the distance between the Milky Way galaxy and other galaxies, the most appropriate unit of measurement is the light year. 34. Which of the following properly sequences the life cycle of a massive star? Stellar ...
Cepheid Calibration
... Once the distance to a few nearby Cepheids was measured by parallax—making the relationship between period and intrinsic brightness absolute—astronomers began using it as a technique for estimating true astronomical distances. This continues today, probing ever deeper into the universe as larger and ...
... Once the distance to a few nearby Cepheids was measured by parallax—making the relationship between period and intrinsic brightness absolute—astronomers began using it as a technique for estimating true astronomical distances. This continues today, probing ever deeper into the universe as larger and ...
galaxy - 106Thursday130-430
... contains the highest density of stars in the galaxy. Although some hot young stars may be found in the nucleus, the primary population of stars there is similar to the old stars found in the halo. ...
... contains the highest density of stars in the galaxy. Although some hot young stars may be found in the nucleus, the primary population of stars there is similar to the old stars found in the halo. ...
Chapter 20 The Universe
... Galaxy- large grouping of stars -our solar system is part of Milky Way Galaxy - what we see as the Milky Way is only the edge (spiral galaxy) ...
... Galaxy- large grouping of stars -our solar system is part of Milky Way Galaxy - what we see as the Milky Way is only the edge (spiral galaxy) ...
Chapter 2 Basic Chemistry
... Origin of the Universe • According to the Big Bang Theory, immediately after the big bang, the Universe was extremely hot and made up of pure energy. There was a period of rapid expansion that caused the energy to cool and allowed sub-atomic particles, such as protons, electrons, and neutrons, to f ...
... Origin of the Universe • According to the Big Bang Theory, immediately after the big bang, the Universe was extremely hot and made up of pure energy. There was a period of rapid expansion that caused the energy to cool and allowed sub-atomic particles, such as protons, electrons, and neutrons, to f ...
relativistic time correction on movement of distant galaxies
... According to Einstein’s theory of relativity, apparent time of objects moving away at constant velocity is stretched by a factor (1+z), as said above. If a galaxy is travelling at say 0.5c, then z=0.5 and scale factor = 1+z = 1+0.5 = 1.5. This means every one second of time on that galaxy appears as ...
... According to Einstein’s theory of relativity, apparent time of objects moving away at constant velocity is stretched by a factor (1+z), as said above. If a galaxy is travelling at say 0.5c, then z=0.5 and scale factor = 1+z = 1+0.5 = 1.5. This means every one second of time on that galaxy appears as ...
Stars_Galaxies_Introduction - Etiwanda E
... What is the source of light in a galaxy? – How is energy produced by the sun? – How are sunspots, prominences, and solar flares related? – Why is our sun considered to be an average star? – How does our sun differ from stars in binary systems? ...
... What is the source of light in a galaxy? – How is energy produced by the sun? – How are sunspots, prominences, and solar flares related? – Why is our sun considered to be an average star? – How does our sun differ from stars in binary systems? ...
Notes 1 - cloudfront.net
... explanations of the positions and movements of stars and other celestial bodies brown dwarfs are the most in the universe stars in sky are mostly giant stars ...
... explanations of the positions and movements of stars and other celestial bodies brown dwarfs are the most in the universe stars in sky are mostly giant stars ...
ASTR 1120-001 Final Examination Phil Armitage, Bruce Ferguson
... 24. When two black holes collide, some energy is lost in the form of gravitational radiation. If each of the original black holes has a mass of 10 Solar masses, the final black hole formed after the merger will have a mass of: (a) 20 Solar masses (b) Less than 20 Solar masses (c) More than 20 Solar ...
... 24. When two black holes collide, some energy is lost in the form of gravitational radiation. If each of the original black holes has a mass of 10 Solar masses, the final black hole formed after the merger will have a mass of: (a) 20 Solar masses (b) Less than 20 Solar masses (c) More than 20 Solar ...
Solutions - UC Berkeley Astronomy w
... The brightness of car headlights is instinctively thought to follow the inverse-square law. In this way you can judge the brightness of an oncoming car. In the fog, the apparent brightness can be decreased, making a car look further away than you would guess from instinct. In the same way, stars in ...
... The brightness of car headlights is instinctively thought to follow the inverse-square law. In this way you can judge the brightness of an oncoming car. In the fog, the apparent brightness can be decreased, making a car look further away than you would guess from instinct. In the same way, stars in ...
Jets from Black Holes in Quasars
... Can estimate by number of very massive stars that have lived & died: ...
... Can estimate by number of very massive stars that have lived & died: ...
Quasars: Back to the Infant Universe
... are farther than three billion light-years away ! Galaxies hosting quasars often appear irregular, as if they recently merged with another galaxy ...
... are farther than three billion light-years away ! Galaxies hosting quasars often appear irregular, as if they recently merged with another galaxy ...
The Next 2-3 Weeks
... Dn = angular diameter at which surface brightness reaches In = 20.75 B-mag/arcsec2 ...
... Dn = angular diameter at which surface brightness reaches In = 20.75 B-mag/arcsec2 ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.