AST4930 Star and Planet Formation
... can be used; they are in many ways complementary, as each of them alone does not guarantee to accurately identify (if at all) the young nature of PMS stars. Limiting to low-mass PMS stars, these are: ...
... can be used; they are in many ways complementary, as each of them alone does not guarantee to accurately identify (if at all) the young nature of PMS stars. Limiting to low-mass PMS stars, these are: ...
Chapter 19 Star Formation
... Discovery 19-1: Observations of Brown Dwarfs Brown dwarfs are difficult to observe directly, as they are very dim. These images are of two binary-star systems, each believed to contain a brown dwarf. The difference in luminosity between the star and the brown dwarf is ...
... Discovery 19-1: Observations of Brown Dwarfs Brown dwarfs are difficult to observe directly, as they are very dim. These images are of two binary-star systems, each believed to contain a brown dwarf. The difference in luminosity between the star and the brown dwarf is ...
B - Department of Physics and Astronomy
... A. a nova involves an explosion on the surface of a neutron star, whereas an X-ray burst involved an explosion on the surface of a white dwarf B. a nova involves an explosion on the surface of a neutron star, whereas an X-ray burst involves the complete collapse of a neutron star to form a black hol ...
... A. a nova involves an explosion on the surface of a neutron star, whereas an X-ray burst involved an explosion on the surface of a white dwarf B. a nova involves an explosion on the surface of a neutron star, whereas an X-ray burst involves the complete collapse of a neutron star to form a black hol ...
Birth of Stars - High Energy Physics at Wayne State
... 20.4.3 Explaining the Planets Seen Now that we have a large sample of planetary systems, astronomers can refine their models of planet formation. Almost all the planets are Jupiter-sized, and many have highly eccentric orbits close to their star. This is a surprise and is hard for the early models ...
... 20.4.3 Explaining the Planets Seen Now that we have a large sample of planetary systems, astronomers can refine their models of planet formation. Almost all the planets are Jupiter-sized, and many have highly eccentric orbits close to their star. This is a surprise and is hard for the early models ...
Sun and Other Stars Notes
... the time it get to 200,000 km out it is turned into energy and through convection transferred towards the surface C.What is Granulation? -Looking at the surface of the Sun it looks highly ________________ -Each granule is about 1000 km across, has a lifetime of __________________ and depending on it ...
... the time it get to 200,000 km out it is turned into energy and through convection transferred towards the surface C.What is Granulation? -Looking at the surface of the Sun it looks highly ________________ -Each granule is about 1000 km across, has a lifetime of __________________ and depending on it ...
Motions of the Night Sky - d_smith.lhseducators.com
... eastern horizon and set in the west, due to the earth’s rotation. However, like the moon, the planets usually move eastward against the background of stars. How fast they move depends on their distance from the earth and their orbital distance from the sun. ...
... eastern horizon and set in the west, due to the earth’s rotation. However, like the moon, the planets usually move eastward against the background of stars. How fast they move depends on their distance from the earth and their orbital distance from the sun. ...
Astronomy Exam #2 for the 10
... The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence lifetime compared to the ...
... The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence lifetime compared to the ...
Chapter 10. Stellar Spectra
... photons of high enough energy to excite the atoms to n - 2. Hence, although there is a lot of HI, there is not a very strong set of Balmer lines, because there are not a lot of HI atoms in the n=2 state to absorb photons of the right energy. Similar things apply to the other atoms but they have much ...
... photons of high enough energy to excite the atoms to n - 2. Hence, although there is a lot of HI, there is not a very strong set of Balmer lines, because there are not a lot of HI atoms in the n=2 state to absorb photons of the right energy. Similar things apply to the other atoms but they have much ...
Date - Wayne State University Physics and Astronomy
... If you do not own a computer, the undergraduate library has a computer lab for you to use or you can use computers available at every public library. The lecture notes will also be available on Blackboard; I will try to post them as soon as possible after each class. READING QUIZZES: To make sure th ...
... If you do not own a computer, the undergraduate library has a computer lab for you to use or you can use computers available at every public library. The lecture notes will also be available on Blackboard; I will try to post them as soon as possible after each class. READING QUIZZES: To make sure th ...
Stellar Evolution
... second and longest stage in the life of a star is the main-sequence stage. During this stage, energy continues to be generated in the core of the star as hydrogen fuses into helium. ...
... second and longest stage in the life of a star is the main-sequence stage. During this stage, energy continues to be generated in the core of the star as hydrogen fuses into helium. ...
ASTR-1020: Astronomy II Course Lecture Notes Section III
... And so on, for instance, if Fe had all but one electron taken away, it would be labeled as Fe XXVI. ...
... And so on, for instance, if Fe had all but one electron taken away, it would be labeled as Fe XXVI. ...
An Introduction to Astronomy and Cosmology
... • BUT 5 magnitude steps = 100 in brightness • So Z = (100)1/5 = 2.512 ...
... • BUT 5 magnitude steps = 100 in brightness • So Z = (100)1/5 = 2.512 ...
Prep/Review Questions - Faculty Web Sites at the University
... Why does even a small telescope reveal many more stars than are visible to the naked eye? You have three eyepieces with focal lengths of 200, 100, and 20 mm to use with your telescope, which has a focal length of 1800 mm. Which eyepiece will give you an image with 90 power magnification? Which eyepi ...
... Why does even a small telescope reveal many more stars than are visible to the naked eye? You have three eyepieces with focal lengths of 200, 100, and 20 mm to use with your telescope, which has a focal length of 1800 mm. Which eyepiece will give you an image with 90 power magnification? Which eyepi ...
Milky Way
... GRBs: Fantastic explosions! • In 1991 new telescopes showed GRBs are isotropic on the sky, proving they are (usually) NOT from our galaxy • Afterglows (optical) were seen from some GRBs. This allowed the host galaxies to be identified and distances to be measured. • The luminosities of these things ...
... GRBs: Fantastic explosions! • In 1991 new telescopes showed GRBs are isotropic on the sky, proving they are (usually) NOT from our galaxy • Afterglows (optical) were seen from some GRBs. This allowed the host galaxies to be identified and distances to be measured. • The luminosities of these things ...
Analysis of Two Pulsating X-ray Sources
... Variable Stars are stars that vary in magnitude (brightness). The behavior of stars that vary in magnitude can be studied by measuring their changes in magnitude over time and plotting the changes on a SS Cygni Light Curve, AAVSO graph called a light curve. The example to the left is a light curve t ...
... Variable Stars are stars that vary in magnitude (brightness). The behavior of stars that vary in magnitude can be studied by measuring their changes in magnitude over time and plotting the changes on a SS Cygni Light Curve, AAVSO graph called a light curve. The example to the left is a light curve t ...
Stargazing
... There is actually a simple explanation. After much observation, scientists discoveredthewaystarsappeartousdependsonmorethantheiractualsize— it’s also about how far they are from us. Therefore, the further a star is from Earth,thesmalleritwillappeartous. ...
... There is actually a simple explanation. After much observation, scientists discoveredthewaystarsappeartousdependsonmorethantheiractualsize— it’s also about how far they are from us. Therefore, the further a star is from Earth,thesmalleritwillappeartous. ...
What do “yellowballs” have to do with the birth of new stars?
... pass through the dusty regions of the interstellar medium. These instruments allow them to detect cool objects and to peer inside nebulae to study how stars form. Initially a newly formed star is too cold to shine in visible light, but it does shine brightly in infrared light. As the star forms, it ...
... pass through the dusty regions of the interstellar medium. These instruments allow them to detect cool objects and to peer inside nebulae to study how stars form. Initially a newly formed star is too cold to shine in visible light, but it does shine brightly in infrared light. As the star forms, it ...
galaxies
... at same time • stars may be gravitationally bound together • two types: open (galactic) and globular Image at http://hubblesite.org/newscenter/archive/releases/star%20cluster/globular/2007/1 8/image/a/format/web/results/50/ ...
... at same time • stars may be gravitationally bound together • two types: open (galactic) and globular Image at http://hubblesite.org/newscenter/archive/releases/star%20cluster/globular/2007/1 8/image/a/format/web/results/50/ ...
Our Solar System
... -Explain the theories for the origin of the solar system -Distinguish between questions that can be answered by science and those that cannot, and between problems that can be solved by technology and those that cannot with regards to solar system formation. -Estimate quantities of distances in pars ...
... -Explain the theories for the origin of the solar system -Distinguish between questions that can be answered by science and those that cannot, and between problems that can be solved by technology and those that cannot with regards to solar system formation. -Estimate quantities of distances in pars ...
A1993KK54100001
... A conference on pulsars was organized in New York for May 20 and 21. Many speakers and some of the original discovery group were invited. I had sent my paper to the organizers with the request for a five minute slot, but this was turned down: "The suggestion was so outlandish that if this was admitt ...
... A conference on pulsars was organized in New York for May 20 and 21. Many speakers and some of the original discovery group were invited. I had sent my paper to the organizers with the request for a five minute slot, but this was turned down: "The suggestion was so outlandish that if this was admitt ...
Stellar Characteristics and Evolution
... heavier than helium” - whether it’s actually metallic or not. Sol contains about 73% Hydrogen, 25% Helium, and 2% metals, and is considered to be a reasonably metal-rich star. Metallicity is related to the “generation” of the star - stars that formed early in the universe’s history generally contain ...
... heavier than helium” - whether it’s actually metallic or not. Sol contains about 73% Hydrogen, 25% Helium, and 2% metals, and is considered to be a reasonably metal-rich star. Metallicity is related to the “generation” of the star - stars that formed early in the universe’s history generally contain ...