The Milky Way: Cartoon
... An intriguing related question: what about S0 galaxies? These are disk galaxies not forming stars. Are they disks that ran out of gas? ...
... An intriguing related question: what about S0 galaxies? These are disk galaxies not forming stars. Are they disks that ran out of gas? ...
PH607lec12
... Why does the galaxy luminosity function have the form that it does? A complete understanding of this is not yet possible, but here are the ingredients: Making galaxies involves at least two things ...
... Why does the galaxy luminosity function have the form that it does? A complete understanding of this is not yet possible, but here are the ingredients: Making galaxies involves at least two things ...
Nebula Beginnings - University of Dayton
... titanic supernova explosions scatter this material back into space where it is used to create new generations of stars. This is the mechanism by which the gas and dust that formed our solar system became enriched with the elements that sustain life on this planet. Hubble spectroscopic observations w ...
... titanic supernova explosions scatter this material back into space where it is used to create new generations of stars. This is the mechanism by which the gas and dust that formed our solar system became enriched with the elements that sustain life on this planet. Hubble spectroscopic observations w ...
Galaxies - Stockton University
... of "dead" magnetars in the Milky Way at 30 million or more. Quakes triggered on the surface of the magnetar cause great volatility in the star and the magnetic field which encompasses it, often leading to extremely powerful gamma ray flare emissions which have been recorded on Earth in 1979, 1998 an ...
... of "dead" magnetars in the Milky Way at 30 million or more. Quakes triggered on the surface of the magnetar cause great volatility in the star and the magnetic field which encompasses it, often leading to extremely powerful gamma ray flare emissions which have been recorded on Earth in 1979, 1998 an ...
The age structure of the Milky Way`s halo
... number-density contrast. Known over-densities and streams are identified by labels on the maps shown in Fig. 1; locations of these are listed in Table 1 of the Supplemental Material. Many of the recognized structures are members of the northern (leading/trailing) or southern (leading/trailing) arm ...
... number-density contrast. Known over-densities and streams are identified by labels on the maps shown in Fig. 1; locations of these are listed in Table 1 of the Supplemental Material. Many of the recognized structures are members of the northern (leading/trailing) or southern (leading/trailing) arm ...
Why are Binary Stars so Important for the Theory
... modern model-simulation method by Wood. The two independent methods give consistent results and the radii of the two components are determined better than 1 %. The surface gravities are then also known very precisely (2 %). The temperature difference is small and weil defined. 80th of the components ...
... modern model-simulation method by Wood. The two independent methods give consistent results and the radii of the two components are determined better than 1 %. The surface gravities are then also known very precisely (2 %). The temperature difference is small and weil defined. 80th of the components ...
Galaxies - WordPress.com
... The glowering eyes from 114 million light years away are the swirling cores of two merging galaxies called NGC 2207 and IC 2163 in the distant Canis Major constellation ...
... The glowering eyes from 114 million light years away are the swirling cores of two merging galaxies called NGC 2207 and IC 2163 in the distant Canis Major constellation ...
Supernova - Mid-Pacific Institute
... apparent brightness and then calculating how far away it must be to appear that bright. Type I supernovae serves as one of several kinds of distance indicators that help us determine the size of the Universe. ...
... apparent brightness and then calculating how far away it must be to appear that bright. Type I supernovae serves as one of several kinds of distance indicators that help us determine the size of the Universe. ...
Lecture 10 - Concord University
... The scenario that leads to nova explosions can produce an even wilder phenomenon. In the early 1900s `novae’ were sometimes observed in other galaxies and were used to help set the distances to galaxies. But, when it became clear that even the nearest galaxies were much further away than anyone ...
... The scenario that leads to nova explosions can produce an even wilder phenomenon. In the early 1900s `novae’ were sometimes observed in other galaxies and were used to help set the distances to galaxies. But, when it became clear that even the nearest galaxies were much further away than anyone ...
Ch17_lecture
... dust content and some are more “active” than others • Galaxies tend to cluster together and these clusters appear to be separating from each other, caught up in a Universe that is expanding • The reason for all this diversity is as yet unanswered ...
... dust content and some are more “active” than others • Galaxies tend to cluster together and these clusters appear to be separating from each other, caught up in a Universe that is expanding • The reason for all this diversity is as yet unanswered ...
Chapter 17 Galaxies Galaxies Early Observations
... • Other items of note: – Ellipticals have a large range of sizes from globular cluster sizes to 100 times the mass of the Milky Way – Census of galaxies nearby: Most are dim dwarf E and dwarf Irr sparsely populated with stars – Census of distant galaxies: In clusters, 60% of members are spirals and ...
... • Other items of note: – Ellipticals have a large range of sizes from globular cluster sizes to 100 times the mass of the Milky Way – Census of galaxies nearby: Most are dim dwarf E and dwarf Irr sparsely populated with stars – Census of distant galaxies: In clusters, 60% of members are spirals and ...
Gugus Bintang [Compatibility Mode]
... 2. Identify stellar types (such as blue giant stars and red giant stars), determine luminosity from the type, measure brightness, and then calculate distance. If the giant star is in a cluster, then we can determine the distance to the cluster by using several giant stars in the cluster to get its d ...
... 2. Identify stellar types (such as blue giant stars and red giant stars), determine luminosity from the type, measure brightness, and then calculate distance. If the giant star is in a cluster, then we can determine the distance to the cluster by using several giant stars in the cluster to get its d ...
$doc.title
... densities converted to star formation rates, we can construct a possible history of the comoving SFR density At face value it implies the universe was much more active in the past (z ~1 - 2) but what happens earlier is unclear There are many complications of interpretation, including the reliability ...
... densities converted to star formation rates, we can construct a possible history of the comoving SFR density At face value it implies the universe was much more active in the past (z ~1 - 2) but what happens earlier is unclear There are many complications of interpretation, including the reliability ...
LISENFELD Ute: Suppression of star formation in compact groups
... interes/ng systems to study galaxy transforma/on because interac/ons between galaxies and with the intragroup medium are frequent. • A gap/canyon was found in their Spitzer IR colors between ac/ve and quiescent galaxies, indica/ng a fast transi/on between both phases (Johnson+07, Walker+1 ...
... interes/ng systems to study galaxy transforma/on because interac/ons between galaxies and with the intragroup medium are frequent. • A gap/canyon was found in their Spitzer IR colors between ac/ve and quiescent galaxies, indica/ng a fast transi/on between both phases (Johnson+07, Walker+1 ...
The Abundances of the Fe Group Elements in Three Early B Stars in
... C/N ratio in the sun is 0.61 dex (Asplund et al. 2005) but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from the star’s core (first dredge-up) may have mixed with the original pristine photospheric material. Or perhap ...
... C/N ratio in the sun is 0.61 dex (Asplund et al. 2005) but in NGC 8181-D1 we find C/N∼0.20 dex. The elevated abundance of nitrogen relative to carbon suggests that CNO-processed material from the star’s core (first dredge-up) may have mixed with the original pristine photospheric material. Or perhap ...
1” “Sky-Notes” of the Open University Astronomy Club. April 2005
... star famous for its striking red colour being fittingly called “Herschel’s Garnet Star”. It is the reddest naked eye star visible from the northern hemisphere. Its colour may show signs of variability. To become a regular variable star observer it is advisable to have your own detailed star charts o ...
... star famous for its striking red colour being fittingly called “Herschel’s Garnet Star”. It is the reddest naked eye star visible from the northern hemisphere. Its colour may show signs of variability. To become a regular variable star observer it is advisable to have your own detailed star charts o ...
Molecular gas in the host galaxy of a quasar at redshift z 5 6.42
... Eddington limit)7, suggesting that the AGN ionizes a significant volume around the quasar. The fact that we detect CO emission implies that the process of enrichment of the ISM in J1148 þ 5251 with heavy elements is relatively advanced, that is, that significant star formation has occurred in the qu ...
... Eddington limit)7, suggesting that the AGN ionizes a significant volume around the quasar. The fact that we detect CO emission implies that the process of enrichment of the ISM in J1148 þ 5251 with heavy elements is relatively advanced, that is, that significant star formation has occurred in the qu ...
printer-friendly sample test questions
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
... A. The once-smaller universe is expanding in all directions. B. The Sun and Earth are located at the center of the universe. C. Everything in the universe is moving the same direction. D. Massive black holes are drawing galaxies away from Earth. 4. We know that nearly all galaxies are moving away fr ...
Chapter 15, Galaxies
... Where are the Galaxies? Where are the galaxies located? Are they located within the Milky Way, or are they much further away from us than the stars? • Before the 1920s, there were no reliable methods of measuring the distance to the galaxies. Many people believed that the galaxies were located with ...
... Where are the Galaxies? Where are the galaxies located? Are they located within the Milky Way, or are they much further away from us than the stars? • Before the 1920s, there were no reliable methods of measuring the distance to the galaxies. Many people believed that the galaxies were located with ...
Measuring the Rotational Speed of Spiral Galaxies and
... Question #6: While astronomers know that dark matter exists, they do not yet know exactly what it is. They do, however, have a pretty good idea of what it is not. Astronomers have suggested many things that we are familiar with that could be the dark matter (objects like planets or very dim stars), ...
... Question #6: While astronomers know that dark matter exists, they do not yet know exactly what it is. They do, however, have a pretty good idea of what it is not. Astronomers have suggested many things that we are familiar with that could be the dark matter (objects like planets or very dim stars), ...
A" Light," Centrally-Concentrated Milky Way Halo?
... halo was selected to have a quiet merger history, and the high resolution region was resampled with 13 million dark matter particles and an equal number of gas particles, for a mass resolution of mDM = 9.8 × 104 M⊙ and mSPH = 2 × 104 M⊙ , and a gravitational softening of 120 pc (physical). Star part ...
... halo was selected to have a quiet merger history, and the high resolution region was resampled with 13 million dark matter particles and an equal number of gas particles, for a mass resolution of mDM = 9.8 × 104 M⊙ and mSPH = 2 × 104 M⊙ , and a gravitational softening of 120 pc (physical). Star part ...
poster
... Figure 3: FUV emission lines observed with FUSE in CTTS and best fit Gaussian profiles ordered by the shift in the O vi 1032 Å line. For RU Lup an additional absorption component is used. ...
... Figure 3: FUV emission lines observed with FUSE in CTTS and best fit Gaussian profiles ordered by the shift in the O vi 1032 Å line. For RU Lup an additional absorption component is used. ...
B - Department of Physics and Astronomy
... of the galaxy decrease in a way that follows Kepler’s law D. the unexpected high amount of interstellar absorption in certain directions 34. The center of our Milky Way Galaxy can be observed most easily at which of the following wavelengths? A. Ultraviolet light B. Hydrogen Balmer Hα light C. *Infr ...
... of the galaxy decrease in a way that follows Kepler’s law D. the unexpected high amount of interstellar absorption in certain directions 34. The center of our Milky Way Galaxy can be observed most easily at which of the following wavelengths? A. Ultraviolet light B. Hydrogen Balmer Hα light C. *Infr ...
Modeling the chemical evolution of the Galaxy halo
... great detail to put constraints on the nature of Galactic halo stars through the chemistry. Although our model is not explicitely motivated by the hierarchical theory of galaxy formation, our results can be considered complementary to the cosmological ones. The discrepancy between the abundance patt ...
... great detail to put constraints on the nature of Galactic halo stars through the chemistry. Although our model is not explicitely motivated by the hierarchical theory of galaxy formation, our results can be considered complementary to the cosmological ones. The discrepancy between the abundance patt ...
Gravity Defied From Potato Asteroids to Magnetised Neutron Stars
... During its active lifetime, a star burns its nuclear fuel, and gravitation is held off by the pressure of the heated gas. Gravity should take over once this fuel is exhausted unless some other agency saves the star from such a fate. Low mass stars find peace as ‘white dwarfs’ when the electrons settl ...
... During its active lifetime, a star burns its nuclear fuel, and gravitation is held off by the pressure of the heated gas. Gravity should take over once this fuel is exhausted unless some other agency saves the star from such a fate. Low mass stars find peace as ‘white dwarfs’ when the electrons settl ...