Investigating Supernova Remnants - Chandra X
... quantum mechanics. Two electrons with the same “spin” are not allowed to occupy the same energy state. Since there are only two ways an electron can spin, only two electrons can occupy any single energy state; this is called the Pauli Exclusion Principle. In a normal gas, this is not a problem – the ...
... quantum mechanics. Two electrons with the same “spin” are not allowed to occupy the same energy state. Since there are only two ways an electron can spin, only two electrons can occupy any single energy state; this is called the Pauli Exclusion Principle. In a normal gas, this is not a problem – the ...
How do stars appear to move to an observer on the
... brighter for a short time. Some white dwarfs do not just cool, they have one or more large explosions. Astronomers think this may be caused by a companion star that is having material taken from it by the white dwarf. ...
... brighter for a short time. Some white dwarfs do not just cool, they have one or more large explosions. Astronomers think this may be caused by a companion star that is having material taken from it by the white dwarf. ...
M104: The Sombrero Galaxy
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
Twitter Feed ITSO Symposium 2017
... "Origin of a cluster-scale gradient in the gas-phase ISM metallicity" The interstellar medium (ISM) metallicity provide a powerful constrain on the complex interplay of star formation and the galactic inflow/outflow, in understanding the factors affecting galaxy evolution. Disentangling the effect o ...
... "Origin of a cluster-scale gradient in the gas-phase ISM metallicity" The interstellar medium (ISM) metallicity provide a powerful constrain on the complex interplay of star formation and the galactic inflow/outflow, in understanding the factors affecting galaxy evolution. Disentangling the effect o ...
Lecture 6: Stellar Distances and Brightness
... Reliable distances out to 10,000 pc away (includes the Galactic Center at about 8000 pc away). When we know the distances to the stars, we can see the constellations as the three dimensional objects they actually are. Example: Orion. ...
... Reliable distances out to 10,000 pc away (includes the Galactic Center at about 8000 pc away). When we know the distances to the stars, we can see the constellations as the three dimensional objects they actually are. Example: Orion. ...
M104: The Sombrero Galaxy
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
... Sombrero contains nearly 2,000 globular clusters —10 times as many as orbit our Milky Way. The ages of the clusters are similar to those in the Milky Way, ranging from 10 billion to 13 billion years old. The Sombrero is suspected of harboring a central black hole that is billions of times more massi ...
Estudio de Cúmulos de Galaxias en el Sloan Digital Sky Survey
... – Physical processes, – Building Galaxy Merger Trees. ...
... – Physical processes, – Building Galaxy Merger Trees. ...
Lecture 2
... there, but different cars. Stars and gas clouds rotate around galaxy faster than the spiral density wave. Clouds get compressed when passing through wave; new star formation is triggered. ...
... there, but different cars. Stars and gas clouds rotate around galaxy faster than the spiral density wave. Clouds get compressed when passing through wave; new star formation is triggered. ...
Galaxy Notes File
... “rotation curves” following the “expected” path in the diagram at right. Rotation curves tend to remain high as far out as they can be measured. ...
... “rotation curves” following the “expected” path in the diagram at right. Rotation curves tend to remain high as far out as they can be measured. ...
As far as - Sangeeta Malhotra
... As part of the GRAPES project, my team performed spectroscopy on the HUDF target region between October 2002 and January 2003, using about 10 percent of the time that went into imaging. We quickly discovered that GRAPES is not just an extragalactic survey, for the HUDF distance scale starts within o ...
... As part of the GRAPES project, my team performed spectroscopy on the HUDF target region between October 2002 and January 2003, using about 10 percent of the time that went into imaging. We quickly discovered that GRAPES is not just an extragalactic survey, for the HUDF distance scale starts within o ...
Ch 3 PPT - Blountstown Middle School
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their ...
... • When a star’s hydrogen supply is nearly gone, the star leaves the main sequence and begins the next stage of its life cycle. • All stars form in the same way, but stars die in different ways, depending on their ...
Neutron Stars
... Periods shorter than this do not exist (such as in the previous calculation) because the object would have to rotate so fast it would overcome gravity and fly apart. ...
... Periods shorter than this do not exist (such as in the previous calculation) because the object would have to rotate so fast it would overcome gravity and fly apart. ...
Dynamics of elliptical galaxies
... Galaxies that appear elliptical on the sky may be intrinsically oblate, prolate, or triaxial, depending upon their symmetries: ...
... Galaxies that appear elliptical on the sky may be intrinsically oblate, prolate, or triaxial, depending upon their symmetries: ...
The Physics of Neutron Stars
... field. On December 27, 2004, it was observed to undergo a sudden very large emission of gamma rays. This flare was detected by the International Gamma-Ray Astrophysics Laboratory (INTEGRAL), as well as by four other missions, including Swift. The 142s flare emitted energy of order 1042 erg. The phys ...
... field. On December 27, 2004, it was observed to undergo a sudden very large emission of gamma rays. This flare was detected by the International Gamma-Ray Astrophysics Laboratory (INTEGRAL), as well as by four other missions, including Swift. The 142s flare emitted energy of order 1042 erg. The phys ...
Clusters of galaxies
... As they operate much as a closed box, they are useful as tracers of galaxy evolution and of ...
... As they operate much as a closed box, they are useful as tracers of galaxy evolution and of ...
Hubble Space Telescope`s
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
PDF - Amazing Space, STScI
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
... Peering into the crowded bulge of our Milky Way galaxy, Hubble looked farther than ever before to nab a group of planet candidates outside our solar system. Astronomers used Hubble to conduct a census of Jupiter-sized extrasolar planets residing in the bulge of our Milky Way galaxy. Looking at a nar ...
lec-galatic-observat..
... At the start of this century, all extended regions of misty light were called nebulae (latin - ‘clouds’). Some of these evidently were associated with star clusters whose distance could be estimated. Were all of these nebulae within our Milky Way ‘Universe’? including those with ‘spiral’ features an ...
... At the start of this century, all extended regions of misty light were called nebulae (latin - ‘clouds’). Some of these evidently were associated with star clusters whose distance could be estimated. Were all of these nebulae within our Milky Way ‘Universe’? including those with ‘spiral’ features an ...
MS 1512–CB58 - Columbia University Department of Astronomy
... Abstract. Recent advances in instrumentation and observing techniques have made it possible to begin to study in detail the stellar populations and the interstellar media of galaxies at redshift z = 3, when the universe was still in its ‘teen years’. I illustrate recent progress in this field with t ...
... Abstract. Recent advances in instrumentation and observing techniques have made it possible to begin to study in detail the stellar populations and the interstellar media of galaxies at redshift z = 3, when the universe was still in its ‘teen years’. I illustrate recent progress in this field with t ...
ASTR-264-Lecture
... 2. earth does not orbit sun, it’s the center with rare exceptions such as Aristarchus, the Greekes rejected the correct explanation because they didn’t think the stars could be that far away The Copernican Revolution: Proposed sun-centered model: 1543 Used modem to determine layout of solar system ...
... 2. earth does not orbit sun, it’s the center with rare exceptions such as Aristarchus, the Greekes rejected the correct explanation because they didn’t think the stars could be that far away The Copernican Revolution: Proposed sun-centered model: 1543 Used modem to determine layout of solar system ...
Chapter 17
... 15. How do we know the position of our sun and it's rotational velocity within the Galaxy? A. From radio waves reflected of the galactic nucleus. B. From its Doppler shift C. From the "fixed basis" of globular clusters in the galactic halo. D. From the proper motions of nearby open clusters. 16. Th ...
... 15. How do we know the position of our sun and it's rotational velocity within the Galaxy? A. From radio waves reflected of the galactic nucleus. B. From its Doppler shift C. From the "fixed basis" of globular clusters in the galactic halo. D. From the proper motions of nearby open clusters. 16. Th ...
phys-1600 - Dave Heppenstall
... This is NOT a math course. The Scale of the Cosmos: The ancient Greeks were perhaps the first to study Astronomy scientifically. This study was not rediscovered until the Renaissance. Our solar system is five billion years old with an approximate life expectancy of ten billion years. 1 Astro ...
... This is NOT a math course. The Scale of the Cosmos: The ancient Greeks were perhaps the first to study Astronomy scientifically. This study was not rediscovered until the Renaissance. Our solar system is five billion years old with an approximate life expectancy of ten billion years. 1 Astro ...
Astrophysics by Daniel Yang
... Galileo was not the inventor of the telescope, but he built his own that was clear enough to observe the moon. He identified features on the moon that contradicted the Aristotelian view that the heavens were perfect and unchanging. He found that the moon was rough like the earth and had vast plains, ...
... Galileo was not the inventor of the telescope, but he built his own that was clear enough to observe the moon. He identified features on the moon that contradicted the Aristotelian view that the heavens were perfect and unchanging. He found that the moon was rough like the earth and had vast plains, ...
Measuring the Milky Way
... the center of the Galaxy, which is the source of these phenomena. An accretion disk surrounding the black hole emits enormous amounts of radiation. ...
... the center of the Galaxy, which is the source of these phenomena. An accretion disk surrounding the black hole emits enormous amounts of radiation. ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.