Lectures 19-20 The Milky Way Galaxy
... the dust. This is helpful because there are large number of K and M giant stars (T ~ 4000 K) in the central part of the galaxy, and these are brightest in at 2-micron. Note that the nearest star to the Sun is ~1 pc away. The density of stars is much higher in the Galactic Center ! ...
... the dust. This is helpful because there are large number of K and M giant stars (T ~ 4000 K) in the central part of the galaxy, and these are brightest in at 2-micron. Note that the nearest star to the Sun is ~1 pc away. The density of stars is much higher in the Galactic Center ! ...
Stellar and Gas Kinematics in the Core and Bar Regions of M100
... We have presented here our preliminary results of M100, taken with the SAURON integral field spectrograph. We have confirmed there are indications for non-circular motions due to spiral armlets and/or the bar. The low dispersion material seen in the gas dispersion map lies where the massive star-for ...
... We have presented here our preliminary results of M100, taken with the SAURON integral field spectrograph. We have confirmed there are indications for non-circular motions due to spiral armlets and/or the bar. The low dispersion material seen in the gas dispersion map lies where the massive star-for ...
aas_gdemessieres - Astronomy at Swarthmore College
... spectral lines. A fit of a delta-function lineprofile model of the Ne X line shows that the actual width exceeds the instrumental broadening, but only by several 100 km s-1. ...
... spectral lines. A fit of a delta-function lineprofile model of the Ne X line shows that the actual width exceeds the instrumental broadening, but only by several 100 km s-1. ...
Lecture 13 Local group chapter 4 of S+G
... which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and bright- all nearby enough that individual stars can be well measured as ...
... which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and bright- all nearby enough that individual stars can be well measured as ...
Comets, Meteors, and Meteoroids
... On November 19, 2002, we passed through a famous comet dust stream. When we flew through this space dust, the meteors seemed to shoot out of a group of stars called “Leo the Lion.” This meteor shower is called the Leonids. In 1833, the Leonids caused a meteor storm. More than 1,000 meteors fell from ...
... On November 19, 2002, we passed through a famous comet dust stream. When we flew through this space dust, the meteors seemed to shoot out of a group of stars called “Leo the Lion.” This meteor shower is called the Leonids. In 1833, the Leonids caused a meteor storm. More than 1,000 meteors fell from ...
Slide 1
... Crab pulsar is slowing down at a rate that is consistent with an age of about 1000 years (plus light travel time), which is when the supernova was observed. The sharpness of the pulses indicates that they come from a region roughly 100 km across, since otherwise the finite travel time for light to m ...
... Crab pulsar is slowing down at a rate that is consistent with an age of about 1000 years (plus light travel time), which is when the supernova was observed. The sharpness of the pulses indicates that they come from a region roughly 100 km across, since otherwise the finite travel time for light to m ...
Nov - Wadhurst Astronomical Society
... month it rises three hours before the Sun and is so bright it is impossible to confuse it with any other astronomical body. Mars still lies in a difficult position for observation from these latitudes. It is in the constellation of Ophiuchus at magnitude +1.2. As I described last month, the shallow ...
... month it rises three hours before the Sun and is so bright it is impossible to confuse it with any other astronomical body. Mars still lies in a difficult position for observation from these latitudes. It is in the constellation of Ophiuchus at magnitude +1.2. As I described last month, the shallow ...
Introduction to the sky
... If we draw a line from the zenith through a celestial object and extend that line to the horizon, we obtain the azimuth angle of the object. By convention, the north point on the horizon has azimuth 0 degrees, the east point has azimuth 90 degrees, the south point has azimuth 180 degrees, and the w ...
... If we draw a line from the zenith through a celestial object and extend that line to the horizon, we obtain the azimuth angle of the object. By convention, the north point on the horizon has azimuth 0 degrees, the east point has azimuth 90 degrees, the south point has azimuth 180 degrees, and the w ...
Physics 1025: Lecture 18 Stellar Magnitudes, Absolute Magnitudes
... when they lie at different distances away; for example, a very bright star like Rigel is not the brightest star in our sky because it is much further away than the sun, our brightest ‘star’. To correctly compare stars, they must all lie at the same distance, so we must calculate what their brightnes ...
... when they lie at different distances away; for example, a very bright star like Rigel is not the brightest star in our sky because it is much further away than the sun, our brightest ‘star’. To correctly compare stars, they must all lie at the same distance, so we must calculate what their brightnes ...
Instructor Notes
... The very first stars would have had no heavy elements, and they would have been massive – so they are exactly the type of stars that are born quickly, live fast, and die spectacularly, spewing heavier elements out into the universe via supernova explosions. Lower mass stars would have formed in a re ...
... The very first stars would have had no heavy elements, and they would have been massive – so they are exactly the type of stars that are born quickly, live fast, and die spectacularly, spewing heavier elements out into the universe via supernova explosions. Lower mass stars would have formed in a re ...
Stars and Constellations
... the story, facilitate a discussion with students about the concept of a star, constellations and how stars evolve. Lead students to understand the difference between apparent magnitude and absolute magnitude. Showing a flashlight at varying distances is a concrete means of demonstrating the differen ...
... the story, facilitate a discussion with students about the concept of a star, constellations and how stars evolve. Lead students to understand the difference between apparent magnitude and absolute magnitude. Showing a flashlight at varying distances is a concrete means of demonstrating the differen ...
Lecture Nine (Powerpoint format) - FLASH Center for Computational
... nuclear state to another. In some cases, a nucleus is formed in an excited state, similar to an excited state of an atom. In an excited atomic state, an electron will transition from one state to a lower state, emitting a particle of light (a photon) in the process. In an excited nuclear state ...
... nuclear state to another. In some cases, a nucleus is formed in an excited state, similar to an excited state of an atom. In an excited atomic state, an electron will transition from one state to a lower state, emitting a particle of light (a photon) in the process. In an excited nuclear state ...
Brown et al. 2008 Studying Resolved Stellar
... One of the core goals of the James Webb Space Telescope (JWST) is to determine the history of star formation and metal enrichment in the Universe. JWST will pursue this goal primarily by searching for luminous objects at very high redshift. An important complement to the high-redshift observations w ...
... One of the core goals of the James Webb Space Telescope (JWST) is to determine the history of star formation and metal enrichment in the Universe. JWST will pursue this goal primarily by searching for luminous objects at very high redshift. An important complement to the high-redshift observations w ...
Stellar Evolution
... 3. _______ is about 12x the mass of Jupiter and considered a failed star. 4. _______ is a group of young stars roughly the same age. 5. _______ is a group of stars which heavily populate the Red Giant region. 6. Star forming isn’t ongoing in our galaxy? T or F 7. _______ is the force that cause a st ...
... 3. _______ is about 12x the mass of Jupiter and considered a failed star. 4. _______ is a group of young stars roughly the same age. 5. _______ is a group of stars which heavily populate the Red Giant region. 6. Star forming isn’t ongoing in our galaxy? T or F 7. _______ is the force that cause a st ...
Document
... Star collapses rapidly! Electron degeneracy can’t stop it. Atomic structure can’t stop it. Electrons and protons crushed together to produce neutrons. • Neutrons pushed together by force of gravity. ...
... Star collapses rapidly! Electron degeneracy can’t stop it. Atomic structure can’t stop it. Electrons and protons crushed together to produce neutrons. • Neutrons pushed together by force of gravity. ...
Galaxies and the Universe
... Things that make Rajib’s brain hurt Taken from CNN.com article, April 25, 2007 on the discovery of an extra-solar planet of nearly Earth mass: There's still a lot that is unknown about the new planet, which could be deemed inhospitable to life once more is learned about it. But as galaxies go, it's ...
... Things that make Rajib’s brain hurt Taken from CNN.com article, April 25, 2007 on the discovery of an extra-solar planet of nearly Earth mass: There's still a lot that is unknown about the new planet, which could be deemed inhospitable to life once more is learned about it. But as galaxies go, it's ...
Gizmos: H-R Diagrams
... 1. How do the appearances of stars A, B, and C in the photo at left compare? _____________________________________ ________________________________________________ ...
... 1. How do the appearances of stars A, B, and C in the photo at left compare? _____________________________________ ________________________________________________ ...
ASTROPHYSICS UNIVERSE - Physics
... of two stars orbiting around their centre of mass. For each star, the other is its companion star. A large percentage of stars are part of systems with at least two stars. Binary star systems are very important in astrophysics, because observing their mutual orbits allows their mass to be determined ...
... of two stars orbiting around their centre of mass. For each star, the other is its companion star. A large percentage of stars are part of systems with at least two stars. Binary star systems are very important in astrophysics, because observing their mutual orbits allows their mass to be determined ...
Stars in Motion
... stars for which distances and motions are available. Velocities of stars in the Milky Way are on the order of 3 × 104 m · s−1 , though some can be as high as 105 m · s−1 . The Sun’s motion through space with respect to the neighboring stars is 2 × 104 m · s−1 . ...
... stars for which distances and motions are available. Velocities of stars in the Milky Way are on the order of 3 × 104 m · s−1 , though some can be as high as 105 m · s−1 . The Sun’s motion through space with respect to the neighboring stars is 2 × 104 m · s−1 . ...
Student Exploration Sheet: Growing Plants
... 2. What are some ways the stars in the photo could be grouped or classified? _____________________________________ ________________________________________________ ________________________________________________ ...
... 2. What are some ways the stars in the photo could be grouped or classified? _____________________________________ ________________________________________________ ________________________________________________ ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.