Chapter 13 Neutron Stars and Black Holes
... of bursts anywhere, particularly not within the Milky Way. Therefore, the bursts must originate from outside our Galaxy. ...
... of bursts anywhere, particularly not within the Milky Way. Therefore, the bursts must originate from outside our Galaxy. ...
Document
... • How do we know the distance to stars and clusters in our galaxy? • Stellar parallax: – Parallax of nearby stars relative to background stars. – Good out to ~500 pc. ...
... • How do we know the distance to stars and clusters in our galaxy? • Stellar parallax: – Parallax of nearby stars relative to background stars. – Good out to ~500 pc. ...
The Universe and Galaxies - West Jefferson Local Schools
... - universe - sum of all _________ and energy that ever has, does, and ever will exist everything physical that exists in _________ and _________ - _________ – the study of how the universe began, what it is made of and how it continues to evolve and change - Of what is the universe made / composed ...
... - universe - sum of all _________ and energy that ever has, does, and ever will exist everything physical that exists in _________ and _________ - _________ – the study of how the universe began, what it is made of and how it continues to evolve and change - Of what is the universe made / composed ...
The Universe and Galaxies - West Jefferson Local Schools
... - universe - sum of all _________ and energy that ever has, does, and ever will exist everything physical that exists in _________ and _________ - _________ – the study of how the universe began, what it is made of and how it continues to evolve and change - Of what is the universe made / composed ...
... - universe - sum of all _________ and energy that ever has, does, and ever will exist everything physical that exists in _________ and _________ - _________ – the study of how the universe began, what it is made of and how it continues to evolve and change - Of what is the universe made / composed ...
The Life Cycle of Stars
... nebula consists primarily of hydrogen and helium. 2. Parts of nebulas collapse in on themselves. When it reaches a certain density, gravitational forces begin to pull the gas and dust particles close together. Over time, this gravity causes regions of greater density to form within the nebula, formi ...
... nebula consists primarily of hydrogen and helium. 2. Parts of nebulas collapse in on themselves. When it reaches a certain density, gravitational forces begin to pull the gas and dust particles close together. Over time, this gravity causes regions of greater density to form within the nebula, formi ...
Unit 12 Guide: Concepts of Earth Science Stars, Galaxies, and the
... Milky Way galaxy? 2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events predicted by the Big Bang Theory. 3. Explain Hubble’s Law. 4. Compare and contrast the apparent and actual motion of stars. How can scientists know if a star or galaxy is moving toward ...
... Milky Way galaxy? 2. What evidence do scientists use to support the Big Bang Theory? Explain the sequence of events predicted by the Big Bang Theory. 3. Explain Hubble’s Law. 4. Compare and contrast the apparent and actual motion of stars. How can scientists know if a star or galaxy is moving toward ...
3P33.pdf
... solid thin bumpy curve shows the fitted solution when a SN 1998bw-like component is added. The best SED solution is obtained with a low redshift (z 0 1) faint SN (the amplitude is only 2% of SN 1998bw, see the thin long dashed curve at the bottom of the plot), which improves slightly the fit ( 2 d o ...
... solid thin bumpy curve shows the fitted solution when a SN 1998bw-like component is added. The best SED solution is obtained with a low redshift (z 0 1) faint SN (the amplitude is only 2% of SN 1998bw, see the thin long dashed curve at the bottom of the plot), which improves slightly the fit ( 2 d o ...
The Sky is Our Laboratory
... • Black holes are collapsed stars with M>= 3.2 M(Sun). Their gravitational pull is so large that not even the light can escape! We can only see them when surrounding matter spirals into the hole. ...
... • Black holes are collapsed stars with M>= 3.2 M(Sun). Their gravitational pull is so large that not even the light can escape! We can only see them when surrounding matter spirals into the hole. ...
Great Astronomers of the 20th Century
... • How distant are the stars and galaxies? • What other types of stars exist? • What happens when stars die? • What is dark matter and where is it located? • How are galaxies organized and why? • Are we alone in the universe? ...
... • How distant are the stars and galaxies? • What other types of stars exist? • What happens when stars die? • What is dark matter and where is it located? • How are galaxies organized and why? • Are we alone in the universe? ...
LIGHT VS. DISTANCE
... Example: A 40 watt light bulb consumes 40 watts of electrical power, but most of this energy goes into HEAT energy. The remaining energy is converted to light. The unit used for light in this case is the “lumen”. A 40 watt bulb emits about 505 lumens of light. ...
... Example: A 40 watt light bulb consumes 40 watts of electrical power, but most of this energy goes into HEAT energy. The remaining energy is converted to light. The unit used for light in this case is the “lumen”. A 40 watt bulb emits about 505 lumens of light. ...
Cosmology 20B Homework 2 solutions
... 1. What are absorption lines, what causes them, and how are they used by astronomers to figure out what astronomical objects are made of? ...
... 1. What are absorption lines, what causes them, and how are they used by astronomers to figure out what astronomical objects are made of? ...
How Far is far ?
... As the other side turns away, its light is slightly red-shifted. The more shifting, the faster the rotational speed, the brighter the galaxy. Again, compare the brightness it should have with what is observed. ...
... As the other side turns away, its light is slightly red-shifted. The more shifting, the faster the rotational speed, the brighter the galaxy. Again, compare the brightness it should have with what is observed. ...
SGR and AXP – are they magnetars?
... strength and configuration. Here we show that the pulsar J2144-3933, previously thought to have a period of 2.84s, actually has a period of 8.51s, which is by far the longest of any known radio pulsar. Moreover, under the usual model assumptions, based on the neutron-star equations of state, this sl ...
... strength and configuration. Here we show that the pulsar J2144-3933, previously thought to have a period of 2.84s, actually has a period of 8.51s, which is by far the longest of any known radio pulsar. Moreover, under the usual model assumptions, based on the neutron-star equations of state, this sl ...
globular clusters - Jeremiah Horrocks Institute
... The Moses Holden Telescope at Alston Observatory is still in the process of being commissioned, but it has already been used to image some deep-sky objects, such as nebulae, globular clusters and distant galaxies. The telescope has a very large collecting area, which allows it to detect these faint ...
... The Moses Holden Telescope at Alston Observatory is still in the process of being commissioned, but it has already been used to image some deep-sky objects, such as nebulae, globular clusters and distant galaxies. The telescope has a very large collecting area, which allows it to detect these faint ...
Black Hole
... Black Hole - a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. ...
... Black Hole - a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape. ...
Supercomputer simulation provides missing link between turbulence, hypernovae and gamma-ray bursts
... outside the visible or ultraviolet bands – that they were not observed until 1967 by satellites looking for evidence of nuclear bomb tests. Most are billions of light years away in distant galaxies, so the fact we can see them at all means they are among the brightest events in the universe. Observa ...
... outside the visible or ultraviolet bands – that they were not observed until 1967 by satellites looking for evidence of nuclear bomb tests. Most are billions of light years away in distant galaxies, so the fact we can see them at all means they are among the brightest events in the universe. Observa ...
Sky News – March 2015 The Realm of the Galaxies
... The North Galactic Pole, the point in the sky directly over the centre of our galaxy, is in the constellation Coma Bernices. With our night sky pointing away from the hustle and bustle of the plane of the Milky Way, we can see deep into the sky without objects being obscured or dimmed by looking thr ...
... The North Galactic Pole, the point in the sky directly over the centre of our galaxy, is in the constellation Coma Bernices. With our night sky pointing away from the hustle and bustle of the plane of the Milky Way, we can see deep into the sky without objects being obscured or dimmed by looking thr ...
2P24.pdf
... to study their properties with spatial resolution. This data, in combination with optical and near-infrared imaging will be used to separate the regions where there is active star formation from the zones where the older underlying population dominates the luminosity. Maps of the extinction and meta ...
... to study their properties with spatial resolution. This data, in combination with optical and near-infrared imaging will be used to separate the regions where there is active star formation from the zones where the older underlying population dominates the luminosity. Maps of the extinction and meta ...
Instrumentation for Cosmology
... Just strings of stars? No, because they would be tightly wound up. Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
... Just strings of stars? No, because they would be tightly wound up. Suppose the age of the galaxy is 10 billion years. Its inner regions rotate once in 200 million years… Therefore, we’d expect about 50 turns. The galaxy would look like a clock spring. ...
Word doc - UC-HiPACC - University of California, Santa Cruz
... brilliant objects in their home galaxies, visible from millions or even billions of light-years away. Supernovae are of several distinct types, as is evident from their spectra—the graphs astronomers plot showing the distribution of colors of the supernova light. One major category is core-collapse ...
... brilliant objects in their home galaxies, visible from millions or even billions of light-years away. Supernovae are of several distinct types, as is evident from their spectra—the graphs astronomers plot showing the distribution of colors of the supernova light. One major category is core-collapse ...
Astr 40 Final Exam Review ()
... 47. A black hole is best defined as any object which is smaller than its event horizon. 48. Isolated black holes slowly evaporate because they slowly leak mass via virtual particles that form near the event horizon. 49. When compared to visual, spectroscopic, or eclipsing binaries, optical doubles a ...
... 47. A black hole is best defined as any object which is smaller than its event horizon. 48. Isolated black holes slowly evaporate because they slowly leak mass via virtual particles that form near the event horizon. 49. When compared to visual, spectroscopic, or eclipsing binaries, optical doubles a ...
History of the Universe and Solar System
... Bang. (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is explained by “dark phantom energy”, which is hypothesized to be forming between galaxies and push ...
... Bang. (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is explained by “dark phantom energy”, which is hypothesized to be forming between galaxies and push ...
F03HW09
... stars that even the nearest stars show very small apparent motions. Therefore, we are limited to the only the nearest stars. If Earth’s orbit were larger, we could measure the parallax of stars at greatest distance. ...
... stars that even the nearest stars show very small apparent motions. Therefore, we are limited to the only the nearest stars. If Earth’s orbit were larger, we could measure the parallax of stars at greatest distance. ...
Unit 1
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
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.