J: Chapter 4: Stars and Galaxies
... right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to the background. Now do the same experiment with your thumb closer to your face, as shown in Figure 3B. What do you observe? The nearer an object is to the observer, the greater its parallax is. ...
... right eye closed, as the girl in Figure 3A is doing. Your thumb appears to change position with respect to the background. Now do the same experiment with your thumb closer to your face, as shown in Figure 3B. What do you observe? The nearer an object is to the observer, the greater its parallax is. ...
How to Measure the Earth - Ramapo College of New Jersey
... of a mountain. Explaining these methods can be done in roughly two hours of class time. If an instructor wants to assign students a project to carry out one of these calculations then one or two more hours may be needed to complete the topic (assuming that the students do measurements during class t ...
... of a mountain. Explaining these methods can be done in roughly two hours of class time. If an instructor wants to assign students a project to carry out one of these calculations then one or two more hours may be needed to complete the topic (assuming that the students do measurements during class t ...
Disk Galaxies and problem 3
... The neutral and molecular hydrogen distributions show diverse geometries. Some show holes in the neutral hydrogen (HI) distribution at their centres. Molecular gas is usually more concentrated toward the centre. The neutral hydrogen and molecular hydrogen distributions of the MW are shown in Figure ...
... The neutral and molecular hydrogen distributions show diverse geometries. Some show holes in the neutral hydrogen (HI) distribution at their centres. Molecular gas is usually more concentrated toward the centre. The neutral hydrogen and molecular hydrogen distributions of the MW are shown in Figure ...
the search for object x
... Does the object move? Most objects outside of our solar system show such small motions that they appear stationary, except over periods of thousands or millions of years. But objects in the solar system, since they are in orbit around the sun, appear to move relatively quickly among the stars. The m ...
... Does the object move? Most objects outside of our solar system show such small motions that they appear stationary, except over periods of thousands or millions of years. But objects in the solar system, since they are in orbit around the sun, appear to move relatively quickly among the stars. The m ...
L6-Diskproperties
... For NGC7331, compare observed rotation curve with what we expect if the galaxy mass is entirely in stars and gas •assume stellar (bulge/disk) density ~ R-band light and typical M/L •assume gas surface density (disk) is 1.4 x HI intensity •adjust M/L so that gas and stars in disk account for as much ...
... For NGC7331, compare observed rotation curve with what we expect if the galaxy mass is entirely in stars and gas •assume stellar (bulge/disk) density ~ R-band light and typical M/L •assume gas surface density (disk) is 1.4 x HI intensity •adjust M/L so that gas and stars in disk account for as much ...
DSSU, the Non-Expanding Universe: Structure, Redshift, Distance
... the upwelling of heated water from below and the cell interface marks the boundary where cooled water sinks, leaving the sawdust debris behind to display the pattern of the motion. In the expanding-space universe the void of the cell is sustained by the upwelling of new space (i.e., space here expan ...
... the upwelling of heated water from below and the cell interface marks the boundary where cooled water sinks, leaving the sawdust debris behind to display the pattern of the motion. In the expanding-space universe the void of the cell is sustained by the upwelling of new space (i.e., space here expan ...
OBJXlab
... Does the object move? Most objects outside of our solar system show such small motions that they appear stationary, except over periods of thousands or millions of years. But objects in the solar system, since they are in orbit around the sun, appear to move relatively quickly among the stars. The m ...
... Does the object move? Most objects outside of our solar system show such small motions that they appear stationary, except over periods of thousands or millions of years. But objects in the solar system, since they are in orbit around the sun, appear to move relatively quickly among the stars. The m ...
The Quest for Object X - Department of Physics and Astronomy
... Does the object move? Most objects outside of our solar system show such small motions that they appear stationary, except over periods of thousands or millions of years. But objects in the solar system, since they are in orbit around the sun, appear to move relatively quickly among the stars. The m ...
... Does the object move? Most objects outside of our solar system show such small motions that they appear stationary, except over periods of thousands or millions of years. But objects in the solar system, since they are in orbit around the sun, appear to move relatively quickly among the stars. The m ...
Devil physics The baddest class on campus IB Physics
... luminosity increases by a factor of a million Matter can also be transferred from one star to another which will heat up and radiate further increasing luminosity ...
... luminosity increases by a factor of a million Matter can also be transferred from one star to another which will heat up and radiate further increasing luminosity ...
Pulsating variable stars and the Hertzsprung
... stars in different stages of their evolution. It is a plot showing a relationship between luminosity (or absolute magnitude) and stars' surface temperature (or spectral type). The bottom scale is ranging from high-temperature blue-white stars (left side of the diagram) to low-temperature red stars ( ...
... stars in different stages of their evolution. It is a plot showing a relationship between luminosity (or absolute magnitude) and stars' surface temperature (or spectral type). The bottom scale is ranging from high-temperature blue-white stars (left side of the diagram) to low-temperature red stars ( ...
The Milky Way - National Tsing Hua University
... galaxies are sites of powerful eruptions that eject highspeed jets in opposite directions. As you study these active galaxies, you will be combining many of the ideas you have discovered so far to answer five essential questions: • What evidence shows that some galactic nuclei are active? ...
... galaxies are sites of powerful eruptions that eject highspeed jets in opposite directions. As you study these active galaxies, you will be combining many of the ideas you have discovered so far to answer five essential questions: • What evidence shows that some galactic nuclei are active? ...
DOC
... By means of a technique known as Asteroseismology, astronomers believe that the pioneer space mission CoRoT will, for the first time, unveil the interior of stars other than our sun, and provide key information about the way they evolve, from the moment they are born to the end of their lives. Stars ...
... By means of a technique known as Asteroseismology, astronomers believe that the pioneer space mission CoRoT will, for the first time, unveil the interior of stars other than our sun, and provide key information about the way they evolve, from the moment they are born to the end of their lives. Stars ...
IFU observations of the high-z Universe
... SSA22b results • Assuming shock velocities of several 100 km/s • Shell travels ~100 kpc in a few 108yr • Shell can cool to ~104 K in this time – Implied by the Voigt profile b parameter – Required to be in photoionization equilibrium ...
... SSA22b results • Assuming shock velocities of several 100 km/s • Shell travels ~100 kpc in a few 108yr • Shell can cool to ~104 K in this time – Implied by the Voigt profile b parameter – Required to be in photoionization equilibrium ...
HR DIAGRAM (Page 1) - McDonald Observatory
... Looking up into the night sky, you see thousands of stars at varying distances from Earth. The luminosity and temperature of each star varies as well. These are the reasons behind the wide range of apparent magnitudes of stars. Imagine being able to magically pull or push each star (including the su ...
... Looking up into the night sky, you see thousands of stars at varying distances from Earth. The luminosity and temperature of each star varies as well. These are the reasons behind the wide range of apparent magnitudes of stars. Imagine being able to magically pull or push each star (including the su ...
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 ...
Clusters of Galaxies
... • The first detections of what we now know as cluster x-ray emission was from rocket flights in the 1960s (Friedman and Byram 1967, Bradt et al 1967) which discovered x-ray emission from the direction of the Virgo cluster, the closest cluster of galaxies. " In a paper of remarkable prescience, Felt ...
... • The first detections of what we now know as cluster x-ray emission was from rocket flights in the 1960s (Friedman and Byram 1967, Bradt et al 1967) which discovered x-ray emission from the direction of the Virgo cluster, the closest cluster of galaxies. " In a paper of remarkable prescience, Felt ...
Comments
... We address the origin of the robust bi-modality in galaxies about a critical stellar mass ~3x10^10 Msol. Less massive galaxies tend to be ungrouped blue star-forming discs correlated along a fundamental line. More massive galaxies are typically grouped red oldstar spheroids on a fundamental plane ho ...
... We address the origin of the robust bi-modality in galaxies about a critical stellar mass ~3x10^10 Msol. Less massive galaxies tend to be ungrouped blue star-forming discs correlated along a fundamental line. More massive galaxies are typically grouped red oldstar spheroids on a fundamental plane ho ...
Galaxies, stars and planets
... many people on the Earth can't be used. The Universe is around 14 billion years old and contains materials with a range of properties that far exceeds anything that can be replicated in laboratories on the Earth. Temperatures range from close to absolute zero (−273.15 ºC) in dense clouds of gas and ...
... many people on the Earth can't be used. The Universe is around 14 billion years old and contains materials with a range of properties that far exceeds anything that can be replicated in laboratories on the Earth. Temperatures range from close to absolute zero (−273.15 ºC) in dense clouds of gas and ...
Life (Briefly) Near a Supernova
... surface of a type M star or the filament of an incandescent light bulb, or roughly like being at ground zero at Hiroshima (Glasstone and Dolan, 1977). One might imagine a few people surviving in suitable shelter (at least briefly). Bank vaults and missile silos are among the few shelters that might ...
... surface of a type M star or the filament of an incandescent light bulb, or roughly like being at ground zero at Hiroshima (Glasstone and Dolan, 1977). One might imagine a few people surviving in suitable shelter (at least briefly). Bank vaults and missile silos are among the few shelters that might ...
OSP2016Level 3 Map - Oregon Star Party
... What is it? V404 Cyg is a black hole (12+/- 3 solar masses) with late K or early G type stellar companion that’s slightly smaller than the Sun, orbiting each other in less than 6.5 days. They are approximately 7800 light years away. Why you want to see it: The stellar companion is distorted into a ...
... What is it? V404 Cyg is a black hole (12+/- 3 solar masses) with late K or early G type stellar companion that’s slightly smaller than the Sun, orbiting each other in less than 6.5 days. They are approximately 7800 light years away. Why you want to see it: The stellar companion is distorted into a ...
Life Before the Fall: Group Galaxy Evolution Prior to Cluster Assembly
... Comparison with properties of both local clusters (Coma) and CL 1358 (z=0.33) ...
... Comparison with properties of both local clusters (Coma) and CL 1358 (z=0.33) ...
driving galaxy evolution since z=1
... starlight – which results from the condensation of baryonic matter ...
... starlight – which results from the condensation of baryonic matter ...
Lecture21 - Michigan State University
... atomic hydrogen is confined to an extremely flat layer that is about 400 LY thick • In the plane of the Galaxy, this cold hydrogen extends out 80,000 LY from the center • Dust is also confined to the plane of the Galaxy being about the same thickness as the hydrogen gas but more concentrated in the ...
... atomic hydrogen is confined to an extremely flat layer that is about 400 LY thick • In the plane of the Galaxy, this cold hydrogen extends out 80,000 LY from the center • Dust is also confined to the plane of the Galaxy being about the same thickness as the hydrogen gas but more concentrated in the ...
Slide 1 - Documents
... related to the existence of the reservoirs of the KB and SD, situated beyond the orbit of Neptune. Here we present a new/improved model for the formation of the OC and its properties at the age of 1 Gyr which can be compared with observations. ...
... related to the existence of the reservoirs of the KB and SD, situated beyond the orbit of Neptune. Here we present a new/improved model for the formation of the OC and its properties at the age of 1 Gyr which can be compared with observations. ...
The Sun And Stars
... which stars are which, nothing more. On a really dark night, you can see about 1000 to 1500 stars. Trying to tell which is which is hard. The constellations help by breaking up the sky into more managable bits. They are used as mnemonics, or memory aids. For example, if you spot three bright stars i ...
... which stars are which, nothing more. On a really dark night, you can see about 1000 to 1500 stars. Trying to tell which is which is hard. The constellations help by breaking up the sky into more managable bits. They are used as mnemonics, or memory aids. For example, if you spot three bright stars i ...
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.