Project 4: The HR diagram. Open clusters
... involves getting images of the cluster through two filters, B and V in our case, reducing the data and plotting V versus (B-V). In some circumstances, such as when plotting stars in a specific open or globular cluster, apparent magnitude, m, or V, rather than absolute magnitude may be used in the Y ...
... involves getting images of the cluster through two filters, B and V in our case, reducing the data and plotting V versus (B-V). In some circumstances, such as when plotting stars in a specific open or globular cluster, apparent magnitude, m, or V, rather than absolute magnitude may be used in the Y ...
Tests and Constraints on Theories of Galaxy Formation and
... in the first 3% of the age of the universe be greater than or equal to the total number of baryons converted to stars in the remaining 97%. The metals produced by this conversion must be hidden in ...
... in the first 3% of the age of the universe be greater than or equal to the total number of baryons converted to stars in the remaining 97%. The metals produced by this conversion must be hidden in ...
unit notes filled out
... The H-R diagram was important in our understanding of stellar evolution because it capture stars in different stages of development and astronomers were able to piece together the life history of a star using the current laws of physics. Where are stars born? A stars life begins in the inter-ste ...
... The H-R diagram was important in our understanding of stellar evolution because it capture stars in different stages of development and astronomers were able to piece together the life history of a star using the current laws of physics. Where are stars born? A stars life begins in the inter-ste ...
Conference Summary Richard Ellis (Caltech) ITALIA
... Red passive disks in COSMOS • significant fraction of red sequence are disks, particularly at low masses • red disks are more bulge-dominated than higher z star-forming disks • a key intermediate phase in the transition to present day spheroidals Bundy et al 0912.1077 ...
... Red passive disks in COSMOS • significant fraction of red sequence are disks, particularly at low masses • red disks are more bulge-dominated than higher z star-forming disks • a key intermediate phase in the transition to present day spheroidals Bundy et al 0912.1077 ...
CENTRAL MICHIGAN UNIVERSITY
... The laboratory exercises will be related to the above topics but order will be determined by the weather. The laboratory work is of three two types: indoor exercises, observing exercises, and a project. The indoor exercises will introduce the student to the techniques of astronomical data analysis. ...
... The laboratory exercises will be related to the above topics but order will be determined by the weather. The laboratory work is of three two types: indoor exercises, observing exercises, and a project. The indoor exercises will introduce the student to the techniques of astronomical data analysis. ...
Project 5: Globular cluster
... by gravity. Globular clusters orbit around the Milky Way galaxy core like satellites. The number of stars in a globular cluster varies from a few thousand up to a million stars for the more massive ones. There are ~150 known globular clusters that orbit our own Milky Way galaxy cor ...
... by gravity. Globular clusters orbit around the Milky Way galaxy core like satellites. The number of stars in a globular cluster varies from a few thousand up to a million stars for the more massive ones. There are ~150 known globular clusters that orbit our own Milky Way galaxy cor ...
No Slide Title
... Hubble telescope was used to observe 19 galaxies out to 108 million lightyears. They discovered almost 800 Cepheid variable stars, a special class of pulsating star used for accurate distance measurements. Here is a picture of one of those galaxies. It is the spiral galaxy NGC 4603, the most distant ...
... Hubble telescope was used to observe 19 galaxies out to 108 million lightyears. They discovered almost 800 Cepheid variable stars, a special class of pulsating star used for accurate distance measurements. Here is a picture of one of those galaxies. It is the spiral galaxy NGC 4603, the most distant ...
Unit 6: Astronomy
... Talking and writing about distances in our solar system can be cumbersome. The Sun and Neptune are on average 4,500,000,000 (or four billion, five hundred million) kilometers apart. Earth’s average distance from the Sun is 150,000,000 (one hundred fifty million) kilometers. It can be difficult to ke ...
... Talking and writing about distances in our solar system can be cumbersome. The Sun and Neptune are on average 4,500,000,000 (or four billion, five hundred million) kilometers apart. Earth’s average distance from the Sun is 150,000,000 (one hundred fifty million) kilometers. It can be difficult to ke ...
Galaxies (Professor Powerpoint)
... First, more massive galaxies rotate faster than less massive ones. Tully and Fisher then made the plausible assumption that brighter galaxies are more massive than dimmer ones. The relationship works like this: As a galaxy rotates, some of the stars move toward us and the light is blue ...
... First, more massive galaxies rotate faster than less massive ones. Tully and Fisher then made the plausible assumption that brighter galaxies are more massive than dimmer ones. The relationship works like this: As a galaxy rotates, some of the stars move toward us and the light is blue ...
Galaxies * Island universes
... Barred Spirals: Same, but additionally have a straight “bar” of stars centered on the center of the galaxy. Milky Way is a barred spiral Irregular: Messy looking galaxies, now known mostly to be galaxies undergoing mergers ...
... Barred Spirals: Same, but additionally have a straight “bar” of stars centered on the center of the galaxy. Milky Way is a barred spiral Irregular: Messy looking galaxies, now known mostly to be galaxies undergoing mergers ...
AQA Minutes Template
... Universe expanding from an extremely dense and hot point over the past 13.6 billion years. The candidate also describes the evidence from, the relative abundances of H and He and the measurement of the microwave background radiation and states they support the big bang theory. Hubble’s Law may also ...
... Universe expanding from an extremely dense and hot point over the past 13.6 billion years. The candidate also describes the evidence from, the relative abundances of H and He and the measurement of the microwave background radiation and states they support the big bang theory. Hubble’s Law may also ...
“Missing” Local Group Satellites
... What’s WALLABY Got to Do With It? • WALLABY: Southern all-sky HI survey, ~4 km/s velocity resolution, 5σ HI detection limit at 1 Mpc ~ 5×104 M • Skymapper: Southern all-sky optical survey in 6 bandpasses • The combination of WALLABY and Skymapper will be uniquely well-suited for finding new ...
... What’s WALLABY Got to Do With It? • WALLABY: Southern all-sky HI survey, ~4 km/s velocity resolution, 5σ HI detection limit at 1 Mpc ~ 5×104 M • Skymapper: Southern all-sky optical survey in 6 bandpasses • The combination of WALLABY and Skymapper will be uniquely well-suited for finding new ...
A-level Physics A Mark scheme Unit 05 - Section 2A
... Universe expanding from an extremely dense and hot point over the past 13.6 billion years. The candidate also describes the evidence from, the relative abundances of H and He and the measurement of the microwave background radiation and states they support the big bang theory. Hubble’s Law may also ...
... Universe expanding from an extremely dense and hot point over the past 13.6 billion years. The candidate also describes the evidence from, the relative abundances of H and He and the measurement of the microwave background radiation and states they support the big bang theory. Hubble’s Law may also ...
a to z of astronomy
... the equator and ecliptic intersect. The vernal equinox occurs on or around March 21 each year and the autumnal equinox on or about September 21. The position in the sky of the vernal equinox is also known as the first point of Aries, and is the zero point for right ascension measurements. Despite it ...
... the equator and ecliptic intersect. The vernal equinox occurs on or around March 21 each year and the autumnal equinox on or about September 21. The position in the sky of the vernal equinox is also known as the first point of Aries, and is the zero point for right ascension measurements. Despite it ...
Time From the Perspective of a Particle Physicist
... Spectroscopic Parallax • If we use well-understood close stars to determine the overall brightness scale of a specific class of star, then measuring the spectrum can be used to give the distance for stars > 500 LY away 1. Determine Surface Temperature + spectral class of star 2. Determine where on ...
... Spectroscopic Parallax • If we use well-understood close stars to determine the overall brightness scale of a specific class of star, then measuring the spectrum can be used to give the distance for stars > 500 LY away 1. Determine Surface Temperature + spectral class of star 2. Determine where on ...
Astro-figer
... Davies, B., Figer, D., Kudritzki, R. P., MacKenty, J., Law, C. J., Najarro, F., and Herrero, A. 2008. The Scutum Red Supergiant Clusters, Conference proceedings, Massive Stars as Cosmic Engines, IAU Symp 250, ed. F. Bresolin, P. A. Crowther, & J. Puls (Cambridge Univ. Press), in press Davies, B., Fi ...
... Davies, B., Figer, D., Kudritzki, R. P., MacKenty, J., Law, C. J., Najarro, F., and Herrero, A. 2008. The Scutum Red Supergiant Clusters, Conference proceedings, Massive Stars as Cosmic Engines, IAU Symp 250, ed. F. Bresolin, P. A. Crowther, & J. Puls (Cambridge Univ. Press), in press Davies, B., Fi ...
ch 15 notes
... Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars’ colors can be deceiving. The coolest stars appear reddish, while the hottest stars appear bluish. Our sun is in the middle and appears yellow. ...
... Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars’ colors can be deceiving. The coolest stars appear reddish, while the hottest stars appear bluish. Our sun is in the middle and appears yellow. ...
Chapter 15 Stars, Galaxies, and Universe Galaxies
... Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars’ colors can be deceiving. The coolest stars appear reddish, while the hottest stars appear bluish. Our sun is in the middle and appears yellow. ...
... Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars’ colors can be deceiving. The coolest stars appear reddish, while the hottest stars appear bluish. Our sun is in the middle and appears yellow. ...
nuclear fusion atoms
... 2. Where do most of the stars you see exist in outer space? 3. What is a light-year? 4. What is in space besides planets and stars? 5. Describe the interstellar medium. 6. What happens inside of the interstellar medium? 7. Are there more galaxies than the Milky Way galaxy? If so, why do scientists n ...
... 2. Where do most of the stars you see exist in outer space? 3. What is a light-year? 4. What is in space besides planets and stars? 5. Describe the interstellar medium. 6. What happens inside of the interstellar medium? 7. Are there more galaxies than the Milky Way galaxy? If so, why do scientists n ...
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... – With enough bandpasses, one can estimate “photometric redshifts”, essentially very low resolution spectroscopy; may be unreliable ...
... – With enough bandpasses, one can estimate “photometric redshifts”, essentially very low resolution spectroscopy; may be unreliable ...
Background Information on Galaxy Classification
... Elliptical galaxies contain mostly old stars, with very little gas and dust found between stars. Since new stars form from clouds of interstellar gas and dust, elliptical galaxies lack the raw ingredients to make new stars. Spiral galaxies, on the other hand, have a mix of young and old stars. Inter ...
... Elliptical galaxies contain mostly old stars, with very little gas and dust found between stars. Since new stars form from clouds of interstellar gas and dust, elliptical galaxies lack the raw ingredients to make new stars. Spiral galaxies, on the other hand, have a mix of young and old stars. Inter ...
Distance - Fixed Earth
... Quotation: "The Cosmological Redshift is a redshift caused by the expansion of space. The wavelength of light increases as it traverses the expanding universe.... The Gravitational Redshift is a shift in the frequency of a photon to lower energy as it climbs out of a gravitational field...." 16 Com ...
... Quotation: "The Cosmological Redshift is a redshift caused by the expansion of space. The wavelength of light increases as it traverses the expanding universe.... The Gravitational Redshift is a shift in the frequency of a photon to lower energy as it climbs out of a gravitational field...." 16 Com ...
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.