![STEPHAN`S QUINTET](http://s1.studyres.com/store/data/007747204_2-9b76cfc5e5a809a1288564b6481b6540-300x300.png)
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 ...
Stars (Ch. 13)
... • Main-sequence stars obey a mass-luminosity relation, approximately given by: ...
... • Main-sequence stars obey a mass-luminosity relation, approximately given by: ...
Project 3. Colour in Astronomy
... Another reason why you obtain lower temperatures is that the Interstellar space is not a perfect vacuum. The interstellar medium (ISM) comprises cold neutral gas (H I at ≈ 70 K), warm neutral gas (H I at 6,000 K) and hot ionised plasma (H II at 10 6 K) primarily located in the plane of the galaxy in ...
... Another reason why you obtain lower temperatures is that the Interstellar space is not a perfect vacuum. The interstellar medium (ISM) comprises cold neutral gas (H I at ≈ 70 K), warm neutral gas (H I at 6,000 K) and hot ionised plasma (H II at 10 6 K) primarily located in the plane of the galaxy in ...
Triangulation
... Hold a pen vertically in front of your nose and concentrate on some far-off object—a distant wall. Close one eye, then open it while closing the other. You should see a large shift of the apparent position of the pencil projected onto the distant wall—a large parallax. ...
... Hold a pen vertically in front of your nose and concentrate on some far-off object—a distant wall. Close one eye, then open it while closing the other. You should see a large shift of the apparent position of the pencil projected onto the distant wall—a large parallax. ...
slides - Indico
... Predictions and tests of nuclear physics (mass models, measurements of fundamental properties of nuclei, operation of n-capture processes) can be compared with observations of these rare stars that exhibit the variety of neutron-capture patterns produced in nature ...
... Predictions and tests of nuclear physics (mass models, measurements of fundamental properties of nuclei, operation of n-capture processes) can be compared with observations of these rare stars that exhibit the variety of neutron-capture patterns produced in nature ...
Stellar Continua
... • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K (but depends on metallicity) • For hotter stars, neutral H and H- opacities diminish, continu ...
... • Varies smoothly with changing temperature • Slope is negative (blue is brighter) for hot stars and positive (visual is brighter) for cooler stars • B-V works as a temperature indicator from 3500K to 9000K (but depends on metallicity) • For hotter stars, neutral H and H- opacities diminish, continu ...
DP11 Foundations of Astronomy
... are a type of fundamental particle produced in the nuclear fusion reactions. They hardly ever interact with matter – about 50 trillion are passing through each of us every second. The fact that they almost never interact with matter is good, because it means that a neutrino produced in the core of t ...
... are a type of fundamental particle produced in the nuclear fusion reactions. They hardly ever interact with matter – about 50 trillion are passing through each of us every second. The fact that they almost never interact with matter is good, because it means that a neutrino produced in the core of t ...
Lecture 8: The Stars - Department of Physics and Astronomy
... • Any star that varies significantly in brightness with time is called a variable star ...
... • Any star that varies significantly in brightness with time is called a variable star ...
The Milky Way Galaxy (ch. 23)
... Sombrero,” or “The Mice.” You don’t have to memorize any galaxy names for the exam The nearest large disk galaxy like ours is The Andromeda Galaxy, M31 These two views are M31 in two different wavelength bands, ultraviolet (emphasizes the areas of star formation, because massive young stars dominate ...
... Sombrero,” or “The Mice.” You don’t have to memorize any galaxy names for the exam The nearest large disk galaxy like ours is The Andromeda Galaxy, M31 These two views are M31 in two different wavelength bands, ultraviolet (emphasizes the areas of star formation, because massive young stars dominate ...
Stars, Galaxies, and the Universe Section 1 Section 1
... from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear to move much. • Earth’s revolution around the sun cause ...
... from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear to move much. • Earth’s revolution around the sun cause ...
THE PHYSICAL CHARACTERIZATION OF THE STARS 1
... production of energy through thermonuclear reactions in their interior with a length that depends on the mass, and die as highly compact objects. The life of an isolated star is mainly driven by their initial mass and chemical composition and along the years, it changes its observational properties, ...
... production of energy through thermonuclear reactions in their interior with a length that depends on the mass, and die as highly compact objects. The life of an isolated star is mainly driven by their initial mass and chemical composition and along the years, it changes its observational properties, ...
Lecture 11
... • Knowing whether a target has a sizable proper motion is important because outdated coordinates will point telescope to the wrong place. • In addition to giving the equinox of the coordinates, which tells you what precessional year your coordinate system corresponds to, for high proper motion stars ...
... • Knowing whether a target has a sizable proper motion is important because outdated coordinates will point telescope to the wrong place. • In addition to giving the equinox of the coordinates, which tells you what precessional year your coordinate system corresponds to, for high proper motion stars ...
Evolved Stellar Populations
... Magellanic Clouds data The MCs are an example of interacting Irr galaxies like others in the Universe. Previous results were obtained from spatially limited regions in the outer/inner disk and in the bar (i.e. using HST). No global picture! Wide-field observations: Near-IR DENIS & 2MASS (on ...
... Magellanic Clouds data The MCs are an example of interacting Irr galaxies like others in the Universe. Previous results were obtained from spatially limited regions in the outer/inner disk and in the bar (i.e. using HST). No global picture! Wide-field observations: Near-IR DENIS & 2MASS (on ...
z - STScI
... • When and how do the first stars and galaxies form? – HST and Keck have detected very luminous star ...
... • When and how do the first stars and galaxies form? – HST and Keck have detected very luminous star ...
Astronomy - Career Account Web Pages
... The Universe's Most Ancient Object The farthest and one of the very earliest galaxies ever seen in the universe appears as a faint red blob in this ultra-deep–field exposure taken with NASA's Hubble Space Telescope. This is the deepest infrared image taken of the universe. Based on the object's colo ...
... The Universe's Most Ancient Object The farthest and one of the very earliest galaxies ever seen in the universe appears as a faint red blob in this ultra-deep–field exposure taken with NASA's Hubble Space Telescope. This is the deepest infrared image taken of the universe. Based on the object's colo ...
2017 Div. C (High School) Astronomy Help Session
... and the actual distance in parsecs – next slide. Good for stars that are <~ 10,000 parsecs from us (or 32,600 light years) – most of the stars in our galaxy. ...
... and the actual distance in parsecs – next slide. Good for stars that are <~ 10,000 parsecs from us (or 32,600 light years) – most of the stars in our galaxy. ...
Document
... • Hubble measured the distance from Earth star. • It was further than any star in the Milky Way galaxy • He concluded that the star was in a separate galaxy • Cepheid variable stars have been used to show that most spiral nebulae are distant galaxies, of which there are billions in the Universe. ...
... • Hubble measured the distance from Earth star. • It was further than any star in the Milky Way galaxy • He concluded that the star was in a separate galaxy • Cepheid variable stars have been used to show that most spiral nebulae are distant galaxies, of which there are billions in the Universe. ...
Double Stars in Scorpio`s Claws
... but you should be able to see two dim red stars that form a line with brighter ρ Scorpii between them. ...
... but you should be able to see two dim red stars that form a line with brighter ρ Scorpii between them. ...
Fulltext PDF - Indian Academy of Sciences
... of black holes. The absence of a detectable massive companion in an X-ray binary compels us to invoke the presence of a black hole. As it stands now, these binaries are the only confirmation of the existence of a black hole. Thus the detection of all these compact objects (if I may be permitted to u ...
... of black holes. The absence of a detectable massive companion in an X-ray binary compels us to invoke the presence of a black hole. As it stands now, these binaries are the only confirmation of the existence of a black hole. Thus the detection of all these compact objects (if I may be permitted to u ...
Color-Magnitude Diagram Lab Manual
... 1. One technique that is useful for locating objects is called star hopping. This involves using the locations of known bright objects to find fainter ones. Although this virtual telescope can perfectly slew to an object by its right ascension and declination, real telescopes are not so precise. In ...
... 1. One technique that is useful for locating objects is called star hopping. This involves using the locations of known bright objects to find fainter ones. Although this virtual telescope can perfectly slew to an object by its right ascension and declination, real telescopes are not so precise. In ...
How do the most massive galaxies constrain theories of
... o But default models do not produce enough massive red galaxies, especially at high redshift, because of continuous low level star formation. need a new process that quenches star ...
... o But default models do not produce enough massive red galaxies, especially at high redshift, because of continuous low level star formation. need a new process that quenches star ...
Stars, Galaxies, and the Universe Section 1 Distances to Stars
... from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear to move much. • Earth’s revolution around the sun cause ...
... from Earth, is caused by the movement of Earth. • The stars seem as though they are moving counterclockwise around a central star called Polaris, the North Star. Polaris is almost directly above the North Pole, and thus the star does not appear to move much. • Earth’s revolution around the sun cause ...
June 2017
... Fig. 1: The variation of intensity of emitted radiation with wavelength It can be seen that the intensity (a measure of the number of photons per unit area per second) is not uniform across the range but peaks at a specific wavelength value (λmax) which depends on the temperature of the object. Towa ...
... Fig. 1: The variation of intensity of emitted radiation with wavelength It can be seen that the intensity (a measure of the number of photons per unit area per second) is not uniform across the range but peaks at a specific wavelength value (λmax) which depends on the temperature of the object. Towa ...
Our Local Group of Galaxies
... similar number (still being discovered). • The brightest systems have MV ~ -16 while the faintest have MV ~ -6 (new discoveries even fainter). ...
... similar number (still being discovered). • The brightest systems have MV ~ -16 while the faintest have MV ~ -6 (new discoveries even fainter). ...
The Extragalactic Distance Database: Color–Magnitude Diagrams
... as a solid wedge due to the high density of points. Other populations visible include the Main Sequence and Blue Loop stars that together form a vertical band seen between about −0.4 < F 606W − F 814W < +0.4. Above and redward of the TRGB centered around F 814W = 23 and F 606W − F 814W = +1.3 are th ...
... as a solid wedge due to the high density of points. Other populations visible include the Main Sequence and Blue Loop stars that together form a vertical band seen between about −0.4 < F 606W − F 814W < +0.4. Above and redward of the TRGB centered around F 814W = 23 and F 606W − F 814W = +1.3 are th ...
Malmquist bias
The Malmquist bias is an effect in observational astronomy which leads to the preferential detection of intrinsically bright objects. It was first described in 1922 by Swedish astronomer Gunnar Malmquist (1893–1982), who then greatly elaborated upon this work in 1925. In statistics, this bias is referred to as a selection bias and affects the survey results in a brightness limited survey, where stars below a certain apparent brightness are not included. Since observed stars and galaxies appear dimmer when farther away, the brightness that is measured will fall off with distance until their brightness falls below the observational threshold. Objects which are more luminous, or intrinsically brighter, can be observed at a greater distance, creating a false trend of increasing intrinsic brightness, and other related quantities, with distance. This effect has led to many spurious claims in the field of astronomy. Properly correcting for these effects has become an area of great focus.