Log Scale Notes
... water. The greater the concentration of H3 O+ , the greater the acidity. For pure water, the Hydrogen ion concentration is 1.0 × 10−7 mol(H3 O+ )/liter or about 1.0 × 10−7 × 6.022 × 1023 = 6.022 × 1016 molecules of H3 O+ per liter. For stomach acid the pH is about 1.0 × 10−2 and for Alka SeltzerTM i ...
... water. The greater the concentration of H3 O+ , the greater the acidity. For pure water, the Hydrogen ion concentration is 1.0 × 10−7 mol(H3 O+ )/liter or about 1.0 × 10−7 × 6.022 × 1023 = 6.022 × 1016 molecules of H3 O+ per liter. For stomach acid the pH is about 1.0 × 10−2 and for Alka SeltzerTM i ...
Moitinho et al. - Wiley Online Library
... Furthermore, metallicity does not affect the colours of these stars significantly. Hence the only unknowns that remain in the CMD analysis are distance and age, which can also be uniquely derived provided that the photometry is deep enough so that a population sequence appears with a well defined mo ...
... Furthermore, metallicity does not affect the colours of these stars significantly. Hence the only unknowns that remain in the CMD analysis are distance and age, which can also be uniquely derived provided that the photometry is deep enough so that a population sequence appears with a well defined mo ...
Galaxies Galore
... arms. The spiral arms, which wrap around the bulge, contain numerous young blue stars and lots of gas and dust. Stars in the bulge tend to be older and redder. Yellow stars like our Sun are found throughout the disk of a spiral galaxy. These galaxies rotate somewhat like a hurricane or a whirlpool. ...
... arms. The spiral arms, which wrap around the bulge, contain numerous young blue stars and lots of gas and dust. Stars in the bulge tend to be older and redder. Yellow stars like our Sun are found throughout the disk of a spiral galaxy. These galaxies rotate somewhat like a hurricane or a whirlpool. ...
BOSS DR12: Clustering of galaxies &Dark Matter halos Sergio Rodríguez-Torres
... the stellar mass function and correlation function in configuration space. • The light-cone reproduces the survey geometry, radial selection function, stellar mass incompleteness and fiber collisions effect. • HAM provides good predictions for 2-point and 3-point statistics, using one single paramet ...
... the stellar mass function and correlation function in configuration space. • The light-cone reproduces the survey geometry, radial selection function, stellar mass incompleteness and fiber collisions effect. • HAM provides good predictions for 2-point and 3-point statistics, using one single paramet ...
1 Josh Machado Science Section C. Language Arts Section E. 5/15
... because of a number of properties. For instance, G stars have a stable energy output throughout most of their lifespan, which means that the amount of heat and radiation the star emits, is roughly the same throughout the star’s main sequence. Also, these stars have long lives (up to 15 billion years ...
... because of a number of properties. For instance, G stars have a stable energy output throughout most of their lifespan, which means that the amount of heat and radiation the star emits, is roughly the same throughout the star’s main sequence. Also, these stars have long lives (up to 15 billion years ...
Using AO to Measure the Star Formation Histories of Massive Galaxies
... To calculate the effects of crowding on magnitudes and colors, we need only consider the Poisson statistics of the luminosity functions (e.g. Tonry & Schneider 1988) hi ...
... To calculate the effects of crowding on magnitudes and colors, we need only consider the Poisson statistics of the luminosity functions (e.g. Tonry & Schneider 1988) hi ...
the Local Group - Simon P Driver
... • to turn a map of the sky into a 3-D picture of the Local Group, we need galaxy distances – Hubble’s law does not apply within the Group because expansion has halted • need to remember that the uncertainty in the distance is ~10% even for bright galaxies – e.g. for the LMC, the range found for ...
... • to turn a map of the sky into a 3-D picture of the Local Group, we need galaxy distances – Hubble’s law does not apply within the Group because expansion has halted • need to remember that the uncertainty in the distance is ~10% even for bright galaxies – e.g. for the LMC, the range found for ...
Photometry Review from Some Constellations of Autumn in the
... atmospheric extinction. This is often in addition to correcting for their temporal variations, particularly when the objects being compared are too far apart on the sky to be observed simultaneously. When doing the calibration from an image that contains both the target and comparison objects in clo ...
... atmospheric extinction. This is often in addition to correcting for their temporal variations, particularly when the objects being compared are too far apart on the sky to be observed simultaneously. When doing the calibration from an image that contains both the target and comparison objects in clo ...
The Milky Way
... • Dense clusters of 50,000 – a million stars • Old (~ 11 billion years), lower-main-sequence stars • Approx. 200 globular clusters in our Milky Way ...
... • Dense clusters of 50,000 – a million stars • Old (~ 11 billion years), lower-main-sequence stars • Approx. 200 globular clusters in our Milky Way ...
W. Couch "Environment of E+A galaxies"
... bJ-band LFs constructed for our E+A samples using SSS photometry and SWML method (Efstathiou et al. 1988) In an identical way, constructed LFs for: all 2dFGRS galaxies gals with ‘elliptical’ spectra ...
... bJ-band LFs constructed for our E+A samples using SSS photometry and SWML method (Efstathiou et al. 1988) In an identical way, constructed LFs for: all 2dFGRS galaxies gals with ‘elliptical’ spectra ...
Galaxies and the Universe
... position of the dark lines. How do they compare with the lines in Figures 20B and 20C? They have shifted in position. What caused this shift? As you just read, when a star is moving toward Earth, its wavelengths of light are compressed, just as the sound waves from the train’s whistle are. This caus ...
... position of the dark lines. How do they compare with the lines in Figures 20B and 20C? They have shifted in position. What caused this shift? As you just read, when a star is moving toward Earth, its wavelengths of light are compressed, just as the sound waves from the train’s whistle are. This caus ...
Quiz 2 Lecture 12
... a. Ring galaxies can be produced by head-on collisions between galaxies. b. The ratio of the number of elliptical to spiral galaxies remains constant over time. c. The Magellanic Clouds may eventually be "cannibalized" by our Galaxy. d. The shape of a galaxy can be influenced by collision with anoth ...
... a. Ring galaxies can be produced by head-on collisions between galaxies. b. The ratio of the number of elliptical to spiral galaxies remains constant over time. c. The Magellanic Clouds may eventually be "cannibalized" by our Galaxy. d. The shape of a galaxy can be influenced by collision with anoth ...
Section 2
... the spectrum is visible on a white surface. Use a double thickness of red cellophane to reduce the occurence of light leaks. Ask students to predict what will happen when red cellophane is held between the prism and the spectrum. Students will observe that only the red part of the spectrum remains v ...
... the spectrum is visible on a white surface. Use a double thickness of red cellophane to reduce the occurence of light leaks. Ask students to predict what will happen when red cellophane is held between the prism and the spectrum. Students will observe that only the red part of the spectrum remains v ...
IEEE 2 Column Format
... 29 ± 0.20, the mass of prescribe MS is obtained in the range 0.68 ≤ M/M⊙ < 7.95. The present analysis indicates that steepness of MF slope increases with the radial distance of the cluster. This fact becomes as evidence of the mass segregation within the cluster. The relaxation time of the cluster h ...
... 29 ± 0.20, the mass of prescribe MS is obtained in the range 0.68 ≤ M/M⊙ < 7.95. The present analysis indicates that steepness of MF slope increases with the radial distance of the cluster. This fact becomes as evidence of the mass segregation within the cluster. The relaxation time of the cluster h ...
Slide 1
... 21.2 The End of a High-Mass Star • The inward pressure is enormous, due to the high mass of the star. • There is nothing stopping the star from collapsing further; it does so very rapidly, in a giant implosion. (Don’t Write) As it continues to become more and more dense, the protons and electrons r ...
... 21.2 The End of a High-Mass Star • The inward pressure is enormous, due to the high mass of the star. • There is nothing stopping the star from collapsing further; it does so very rapidly, in a giant implosion. (Don’t Write) As it continues to become more and more dense, the protons and electrons r ...
Lesson 3
... planets. They have spent thousands of years studying the motion of planets. They have also calculated the distance of planets and stars from our Sun. Their work helps us better understand the age of Earth, the solar system, and our universe. Astronomers have to work with large numbers because the di ...
... planets. They have spent thousands of years studying the motion of planets. They have also calculated the distance of planets and stars from our Sun. Their work helps us better understand the age of Earth, the solar system, and our universe. Astronomers have to work with large numbers because the di ...
Chapter 15
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
... the hydrogen fuel in its core to make helium. The helium is basically just sitting there, so it's not producing any energy. Instead, the core is shrinking and getting hotter. Before long, it'll get hot enough to ignite the helium, which will begin fusing together to make heavier elements. When that ...
RachelStarProject
... A red giant is a very big star that weighs about one half to ten times as much as our sun. They are called red giants because they look red and are very big. Many red giants could fit thousands and thousands of suns, like the one in our solar system, inside them! ...
... A red giant is a very big star that weighs about one half to ten times as much as our sun. They are called red giants because they look red and are very big. Many red giants could fit thousands and thousands of suns, like the one in our solar system, inside them! ...
Galaxies and Active Galaxies
... • In spiral galaxies, the rotation curve remains at about the same value at great distances from the center (it is said to be “flat”). • This means that the enclosed mass continues to increase even though the amount of visible, luminous matter falls off at large distances from the center. • In ellip ...
... • In spiral galaxies, the rotation curve remains at about the same value at great distances from the center (it is said to be “flat”). • This means that the enclosed mass continues to increase even though the amount of visible, luminous matter falls off at large distances from the center. • In ellip ...
Quasars
... galaxies combined. • Quasars give off such enormous amounts of energy that they can be a trillion times brighter than the Sun. • Quasars are so bright that they drown out the light from all the other stars in the same galaxy. • Most quasars are larger than our solar system. • A quasar is approximate ...
... galaxies combined. • Quasars give off such enormous amounts of energy that they can be a trillion times brighter than the Sun. • Quasars are so bright that they drown out the light from all the other stars in the same galaxy. • Most quasars are larger than our solar system. • A quasar is approximate ...
the opportunities and challenges for astrometry in the 21st century
... dynamical friction in the centers of galaxies where multitudes of stars spiral into a common gravitational center. Questions abound concerning the masses of these black holes and some estimates exist from spectroscopic measurements of the widths of spectral lines in the integrated spectra of the cor ...
... dynamical friction in the centers of galaxies where multitudes of stars spiral into a common gravitational center. Questions abound concerning the masses of these black holes and some estimates exist from spectroscopic measurements of the widths of spectral lines in the integrated spectra of the cor ...
Formation of spiral and elliptical galaxies in a CDM cosmogony
... The attening of the halo (axial ratio 2:3) is too high to be a result of its rotation, i.e., it must be caused by the anisotropic velocity dispersion, while the attening of the bulge (axial ratio 1:1.3) is at least partially due to its rotation (v= 1). These results support the idea that disk ...
... The attening of the halo (axial ratio 2:3) is too high to be a result of its rotation, i.e., it must be caused by the anisotropic velocity dispersion, while the attening of the bulge (axial ratio 1:1.3) is at least partially due to its rotation (v= 1). These results support the idea that disk ...
... – Stars travel around the center of the galaxy in their own orbits – Stars and gas traveling in the disc will bunch up as they enter an arm and will spread out as they leave – This bunching is similar to that of cars on a freeway except gravity causes the bunching of the stars – Gas entering the arm ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.