Hypervelocity Globular: A beacon of merging clusters Oleg Gnedin with Alexey Vikhlinin
... • M86 mean velocity • group velocity dispersion • gravitational potential gain Depending on the merger mass ratio and M86 distance, the probability of HVGC velocity being as extreme as observed is 5% to 35% Not extreme! ...
... • M86 mean velocity • group velocity dispersion • gravitational potential gain Depending on the merger mass ratio and M86 distance, the probability of HVGC velocity being as extreme as observed is 5% to 35% Not extreme! ...
14-1 Reading Questions: Neutron Stars
... ___________________________. Theory predicts that such an object would spin _____________ times per second, have a surface temperature nearly as hot as the ___________ interior, and possess a magnetic field a ________________ times stronger than Earth’s. 2. How are neutron stars similar to white dwa ...
... ___________________________. Theory predicts that such an object would spin _____________ times per second, have a surface temperature nearly as hot as the ___________ interior, and possess a magnetic field a ________________ times stronger than Earth’s. 2. How are neutron stars similar to white dwa ...
Directed Reading A
... a. They are explosions in which a massive star collapses. b. They are explosions that occur at the beginning of a star’s life. c. They can be brighter than an entire galaxy for several days. d. They are explosions in which a star throws its outer layers into space. 27. A star that has collapsed unde ...
... a. They are explosions in which a massive star collapses. b. They are explosions that occur at the beginning of a star’s life. c. They can be brighter than an entire galaxy for several days. d. They are explosions in which a star throws its outer layers into space. 27. A star that has collapsed unde ...
Star Fromation and ISM
... in the globular cluster is due to its extreme age – those stars have already used up their fuel and have moved off the main sequence. ...
... in the globular cluster is due to its extreme age – those stars have already used up their fuel and have moved off the main sequence. ...
Be Stars
... In contrast, there are also helium-weak B-type stars with understrength helium lines and strong hydrogen spectra. Other chemically strange B-types stars are mercury–manganese stars. Finally, there are Be stars that show a prominent emission spectrum of hydrogen this is because they have a rapid rate ...
... In contrast, there are also helium-weak B-type stars with understrength helium lines and strong hydrogen spectra. Other chemically strange B-types stars are mercury–manganese stars. Finally, there are Be stars that show a prominent emission spectrum of hydrogen this is because they have a rapid rate ...
Astronomy Webquest _2 STARS
... Life Cycle of a Star Stars are formed in clouds of gas and dust, known as ________________. _____________ _______________________ at the center (or core) of stars provides enough energy to make them shine brightly for many years. The exact lifetime of a star depends very much on its ______________. ...
... Life Cycle of a Star Stars are formed in clouds of gas and dust, known as ________________. _____________ _______________________ at the center (or core) of stars provides enough energy to make them shine brightly for many years. The exact lifetime of a star depends very much on its ______________. ...
the lives of stars
... star, has been a main sequence star for about 5 billion years. It will continue to shine without changing for about 5 billion more years. Really large stars burn through their supply of hydrogen very quickly, so they ‘live fast and die young’! These very large stars may only be on the main sequence ...
... star, has been a main sequence star for about 5 billion years. It will continue to shine without changing for about 5 billion more years. Really large stars burn through their supply of hydrogen very quickly, so they ‘live fast and die young’! These very large stars may only be on the main sequence ...
PHYSICS 1500 - The University of Sydney
... impression of a ‘hot Jupiter’ – a giant planet in a very close orbit around its parent star. The first such planet discovered was 51 Pegasi b which takes 4.23 days to orbit a sun-like star. The system is about 50 light years from Earth. The planet was found using the radial velocity method for detec ...
... impression of a ‘hot Jupiter’ – a giant planet in a very close orbit around its parent star. The first such planet discovered was 51 Pegasi b which takes 4.23 days to orbit a sun-like star. The system is about 50 light years from Earth. The planet was found using the radial velocity method for detec ...
Extra Questions Stellar properties
... 1.A certain type of variable star is known to have an absolute magnitude of 0.0. Such stars are observed in a particular star cluster to have an average magnitude of +16.0 What is the distance to that star cluster. 2 The star Procyon in Canis Major is a prominent star in the winter sky because its a ...
... 1.A certain type of variable star is known to have an absolute magnitude of 0.0. Such stars are observed in a particular star cluster to have an average magnitude of +16.0 What is the distance to that star cluster. 2 The star Procyon in Canis Major is a prominent star in the winter sky because its a ...
Stars Take Center Stage in
... computer visualizations onto the 87-foot, seven-millionpixel dome of the museum's planetarium. The space show explains how dark matter's gravity gathered the primordial gas in the universe to form the first stars, and how these massive stars exploded, seeding the galaxy with new stars and the chemic ...
... computer visualizations onto the 87-foot, seven-millionpixel dome of the museum's planetarium. The space show explains how dark matter's gravity gathered the primordial gas in the universe to form the first stars, and how these massive stars exploded, seeding the galaxy with new stars and the chemic ...
Lecture16
... Low pressure: lines are narrow: giant & supergiant stars High pressure: lines are wide: normal stars ...
... Low pressure: lines are narrow: giant & supergiant stars High pressure: lines are wide: normal stars ...
Powerpoint Presentation (large file)
... • The duration of a star’s main sequence lifetime depends on the amount of hydrogen in the star’s core and the rate at which the hydrogen is consumed • The more massive a star, the shorter is its mainsequence lifetime ...
... • The duration of a star’s main sequence lifetime depends on the amount of hydrogen in the star’s core and the rate at which the hydrogen is consumed • The more massive a star, the shorter is its mainsequence lifetime ...
Beauty and the beast - University of Wyoming
... mistaken for a UFO! Sirius is one of our neighboring stars at a little over 8 light years away. For comparison, the closest star to the sun is Proxima Centauri, which is 4.2 light years away. Unfortunately, Proxima Centauri is not visible this far north of the equator. ...
... mistaken for a UFO! Sirius is one of our neighboring stars at a little over 8 light years away. For comparison, the closest star to the sun is Proxima Centauri, which is 4.2 light years away. Unfortunately, Proxima Centauri is not visible this far north of the equator. ...
Early Spring Observing – Millstone News Night Sky
... The Beehive contains a larger star population than most other nearby clusters. Under dark skies the Beehive Cluster looks like a nebulous object to the naked eye; thus it has been known since ancient times. We often find it, rather than the constellation it is found in (Cancer). From Wikipedia: The ...
... The Beehive contains a larger star population than most other nearby clusters. Under dark skies the Beehive Cluster looks like a nebulous object to the naked eye; thus it has been known since ancient times. We often find it, rather than the constellation it is found in (Cancer). From Wikipedia: The ...
Infinity Express
... MS-ESS1- Analyze and interpret data to determine scale properties of objects in the solar ...
... MS-ESS1- Analyze and interpret data to determine scale properties of objects in the solar ...
Last time: Star Clusters (sec. 19.6)
... deficit compared to gravity, so core contracts, heating up (just like for a protostar). But the overlying layers heat as well, causing H-burning just outside the core to become very rapid H shell-burning. See Fig. 20-3. So star gets brighter (L rises) even though it has lost its fuel at the center ...
... deficit compared to gravity, so core contracts, heating up (just like for a protostar). But the overlying layers heat as well, causing H-burning just outside the core to become very rapid H shell-burning. See Fig. 20-3. So star gets brighter (L rises) even though it has lost its fuel at the center ...
ASTRONOMY: WHAT DO YOU NEED TO KNOW
... What is a hydrogen-fusion shell, when does it form, and why does it make a star expand? In hydrogen-fusion a helium core is produced that acts like ash because it’s too cool to fuse further. Still it gets hotter because it contracts and converts gravitational energy to heat. This core heats the hydr ...
... What is a hydrogen-fusion shell, when does it form, and why does it make a star expand? In hydrogen-fusion a helium core is produced that acts like ash because it’s too cool to fuse further. Still it gets hotter because it contracts and converts gravitational energy to heat. This core heats the hydr ...
PHYSICS 1500 - ASTRONOMY TOTAL
... allowing the solar wind to strip hydrogen from its atmosphere. (e) Mars has too thin an atmosphere to allow open bodies of water to exist on its surface. Question 4 Which of the following statements about planetary and satellite geology is true? (a) Saturn’s moon Enceladus has a young surface which ...
... allowing the solar wind to strip hydrogen from its atmosphere. (e) Mars has too thin an atmosphere to allow open bodies of water to exist on its surface. Question 4 Which of the following statements about planetary and satellite geology is true? (a) Saturn’s moon Enceladus has a young surface which ...
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.