Astronomy 82 - Problem Set #1
... (Note that we only have one significant figure in this problem!) So we see that the supernova had been expanding for about 900 years in 1983 – therefore the supernova must have been seen to explode around the year (1983 – 900) =1083 ~ 1100 AD. Again, this number is no secret – the Crab Nebula was ob ...
... (Note that we only have one significant figure in this problem!) So we see that the supernova had been expanding for about 900 years in 1983 – therefore the supernova must have been seen to explode around the year (1983 – 900) =1083 ~ 1100 AD. Again, this number is no secret – the Crab Nebula was ob ...
The Danger of Deadly Cosmic Explosions
... • Deadly from neutrinos within 30 light years. • Atmosphere, weather, ruined. • Major extinction. • Not much harm if further. • SN material in sediments. • 1 SN/100 years in our galaxy • Close 1 per 100million years. • Good news: our neighbors are peaceful. • Bad news: when one shows signs of blowin ...
... • Deadly from neutrinos within 30 light years. • Atmosphere, weather, ruined. • Major extinction. • Not much harm if further. • SN material in sediments. • 1 SN/100 years in our galaxy • Close 1 per 100million years. • Good news: our neighbors are peaceful. • Bad news: when one shows signs of blowin ...
bildstencifar2010
... Palomar Transient Factory,Pan-Starrs1) and future (Dark Energy Survey, SkyMapper) supernovae surveys probe large volumes, revealing a diversity of ...
... Palomar Transient Factory,Pan-Starrs1) and future (Dark Energy Survey, SkyMapper) supernovae surveys probe large volumes, revealing a diversity of ...
Supernovae Oct 19 − Supernova 1987A
... period Chih-ho, …, a guest star appeared several degrees SE of Thien-kuan. After more than a year it gradually became invisible.−p564. ...
... period Chih-ho, …, a guest star appeared several degrees SE of Thien-kuan. After more than a year it gradually became invisible.−p564. ...
Supernova
... Current thinking B – Once the Chandrasekhar limit is reached, electron degeneracy pressure can no longer support the strong gravitational pull, the temperature will rise, and carbon will fuse explosively in the dwarf. The carbon/oxygen fuse explosively, blowing the entire system into space and leavi ...
... Current thinking B – Once the Chandrasekhar limit is reached, electron degeneracy pressure can no longer support the strong gravitational pull, the temperature will rise, and carbon will fuse explosively in the dwarf. The carbon/oxygen fuse explosively, blowing the entire system into space and leavi ...
Type Ia supernovae and the ESSENCE supernova survey
... standardizable candles. The brighter ones are 4 billion times brighter than the Sun! Garnavich et al. (2004) ...
... standardizable candles. The brighter ones are 4 billion times brighter than the Sun! Garnavich et al. (2004) ...
ASTR100 Homework #5 Solutions Chapter 11 #29, 31 Due
... Decide whether the statement makes sense or does not. Explain clearly. If you could look inside the Sun today, you’d find that its core contains a much higher proportion of helium and a lower proportion of hydrogen than it did when the Sun was born. This statement makes sense because over the last 4 ...
... Decide whether the statement makes sense or does not. Explain clearly. If you could look inside the Sun today, you’d find that its core contains a much higher proportion of helium and a lower proportion of hydrogen than it did when the Sun was born. This statement makes sense because over the last 4 ...
Planetary Configurations
... fusion switches on. Leads to an explosion and ejection of mass. Repeats. • SUPERNOVAE: (Type Ia) Transfer is rapid so fusion is ongoing. Mass accumulates until Chandra limit is exceeded which leads to a catastrophic explosion. SNe can become brighter than a galaxy for a time. ...
... fusion switches on. Leads to an explosion and ejection of mass. Repeats. • SUPERNOVAE: (Type Ia) Transfer is rapid so fusion is ongoing. Mass accumulates until Chandra limit is exceeded which leads to a catastrophic explosion. SNe can become brighter than a galaxy for a time. ...
Chapter 16
... All thermonuclear reactions occurring in the cores of stars are exothermic, that is, they release energy, but only up until the Fusion of Iron (Fe). Iron takes more energy to fuse than can be obtained from it, and is an example of an endothermic process, which does not occur in stars. As stars produ ...
... All thermonuclear reactions occurring in the cores of stars are exothermic, that is, they release energy, but only up until the Fusion of Iron (Fe). Iron takes more energy to fuse than can be obtained from it, and is an example of an endothermic process, which does not occur in stars. As stars produ ...
chapter10
... The Final Breaths of Sun-Like Stars: Planetary Nebulae Remnants of stars with ~ 1 – a few Msun Radii: R ~ 0.2 - 3 light years Expanding at ~10 – 20 km/s ( Doppler shifts) Less than 10,000 years old ...
... The Final Breaths of Sun-Like Stars: Planetary Nebulae Remnants of stars with ~ 1 – a few Msun Radii: R ~ 0.2 - 3 light years Expanding at ~10 – 20 km/s ( Doppler shifts) Less than 10,000 years old ...
80.BrainPopLifeCycleStars
... 13.At the center of a planetary nebula is a core of ___________, which after cooling becomes a white dwarf. 14.Stars much bigger than ours (super red giants) collapse so quickly that they explode into a _____________, scattering stellar material far and wide. A supernova explosion can last for a ___ ...
... 13.At the center of a planetary nebula is a core of ___________, which after cooling becomes a white dwarf. 14.Stars much bigger than ours (super red giants) collapse so quickly that they explode into a _____________, scattering stellar material far and wide. A supernova explosion can last for a ___ ...
Supernovae Type II
... 9. The neutron-rich shock, meanwhile, will induce creation of elements heavier than iron by neutron capture. 10. The shock continues into interstellar space at speeds of c/10. For example, the crab neubula, resulting from the 1054 A.D. supernova is large and still expanding. 11. The neutron star may ...
... 9. The neutron-rich shock, meanwhile, will induce creation of elements heavier than iron by neutron capture. 10. The shock continues into interstellar space at speeds of c/10. For example, the crab neubula, resulting from the 1054 A.D. supernova is large and still expanding. 11. The neutron star may ...
Life Cycle of a Star
... A supermassive black hole (SMBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses. Most—and possibly all—galaxies are inferred to contain a supermassive black hole at their centers. In the case of the Milky Way, the SMBH is believed to correspond w ...
... A supermassive black hole (SMBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses. Most—and possibly all—galaxies are inferred to contain a supermassive black hole at their centers. In the case of the Milky Way, the SMBH is believed to correspond w ...
File
... 8-25 X larger than our Sun Consume their fuel very fast – die more quickly and more violently Star expands into a Supergiant which causes the core to collapse and the outer portion to explode creating a Supernova then a Neutron Star ...
... 8-25 X larger than our Sun Consume their fuel very fast – die more quickly and more violently Star expands into a Supergiant which causes the core to collapse and the outer portion to explode creating a Supernova then a Neutron Star ...
Chapter 21 Stellar Explosions
... A supernova is incredibly luminous—as can be seen from these curves—and more than a million times as bright as a nova: ...
... A supernova is incredibly luminous—as can be seen from these curves—and more than a million times as bright as a nova: ...
observed
... (Cepheid Variable stars) to get a much larger distance to Andromeda. Hence S And was 20,000 times brighter than a “normal” nova… Baade therefore dubbed these objects “super-novae”. ...
... (Cepheid Variable stars) to get a much larger distance to Andromeda. Hence S And was 20,000 times brighter than a “normal” nova… Baade therefore dubbed these objects “super-novae”. ...
Stars Answers - Science Skool!
... 6. How did the elements come to be formed? Nuclear fusion of hydrogen forms helium; heavy elements are formed by the fusion of lighter elements during a supernova 7. Describe how a star forms. Dust and gas is pulled together by gravity 8. What happens to massive stars after the red super giant stage ...
... 6. How did the elements come to be formed? Nuclear fusion of hydrogen forms helium; heavy elements are formed by the fusion of lighter elements during a supernova 7. Describe how a star forms. Dust and gas is pulled together by gravity 8. What happens to massive stars after the red super giant stage ...
Supernovae: Heavy Elements
... • The pressure of these neutrinos causes part of the imploding core to rebound • This rebound comes in the form of a shockwave, which rips through the still collapsing outer core • The collapsing outer shell is met by the shockwave and then by a rarefaction wave and is ejected back into space in a c ...
... • The pressure of these neutrinos causes part of the imploding core to rebound • This rebound comes in the form of a shockwave, which rips through the still collapsing outer core • The collapsing outer shell is met by the shockwave and then by a rarefaction wave and is ejected back into space in a c ...
Chapter13
... Low luminosity; high temperature => White dwarfs are found in the lower left corner of the HertzsprungRussell diagram. The more massive a white dwarf, the smaller it is! ...
... Low luminosity; high temperature => White dwarfs are found in the lower left corner of the HertzsprungRussell diagram. The more massive a white dwarf, the smaller it is! ...
The World Year of Physics is a worldwide celebration of physics
... Can you spot the "new star"? It's supernova 2004dj, which was discovered in the outskirts of NGC 2403, a nearby spiral galaxy, in July of 2004. At about 11 million light-years from Earth, it is the closest such stellar explosion of the past decade, and observations of it continue to reveal clues to ...
... Can you spot the "new star"? It's supernova 2004dj, which was discovered in the outskirts of NGC 2403, a nearby spiral galaxy, in July of 2004. At about 11 million light-years from Earth, it is the closest such stellar explosion of the past decade, and observations of it continue to reveal clues to ...
neutron star - Adams State University
... It’s the same idea as with a low mass star: • Core begins to collapse, and so heats up • Fusion of hydrogen can begin in a shell • This fusion drives the outer layers outward, making a red supergiant • When core is hot enough, helium fusion ...
... It’s the same idea as with a low mass star: • Core begins to collapse, and so heats up • Fusion of hydrogen can begin in a shell • This fusion drives the outer layers outward, making a red supergiant • When core is hot enough, helium fusion ...
Presentation available here - Lunar and Planetary Institute
... All core collapse explosions are asymmetric, maybe produced by magnetic jets. How can this be proved? Gamma-ray bursts are caused by jets of material moving at nearly the speed of light. Do they mark the birth of black holes? At least some gamma-ray bursts (and maybe all) arise in supernova ex ...
... All core collapse explosions are asymmetric, maybe produced by magnetic jets. How can this be proved? Gamma-ray bursts are caused by jets of material moving at nearly the speed of light. Do they mark the birth of black holes? At least some gamma-ray bursts (and maybe all) arise in supernova ex ...
G030485-00 - DCC
... • Hydrogen and then Helium fuse togetherproducing energy (light and heat) and forming heavier elements ...
... • Hydrogen and then Helium fuse togetherproducing energy (light and heat) and forming heavier elements ...
Supernova
A supernova is a stellar explosion that briefly outshines an entire galaxy, radiating as much energy as the Sun or any ordinary star is expected to emit over its entire life span, before fading from view over several weeks or months. The extremely luminous burst of radiation expels much or all of a star's material at a velocity of up to 7007300000000000000♠30,000 km/s (10% of the speed of light), driving a shock wave into the surrounding interstellar medium. This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant. Supernovae are potentially strong galactic sources of gravitational waves. A great proportion of primary cosmic rays comes from supernovae.Supernovae are more energetic than novae. Nova means ""new"" in Latin, referring to what appears to be a very bright new star shining in the celestial sphere; the prefix ""super-"" distinguishes supernovae from ordinary novae, which are far less luminous. The word supernova was coined by Walter Baade and Fritz Zwicky in 1931. It is pronounced /ˌsuːpərnoʊvə/ with the plural supernovae /ˌsuːpərnoʊviː/ or supernovas (abbreviated SN, plural SNe after ""supernovae"").Supernovae can be triggered in one of two ways: by the sudden re-ignition of nuclear fusion in a degenerate star; or by the gravitational collapse of the core of a massive star. In the first case, a degenerate white dwarf may accumulate sufficient material from a companion, either through accretion or via a merger, to raise its core temperature, ignite carbon fusion, and trigger runaway nuclear fusion, completely disrupting the star. In the second case, the core of a massive star may undergo sudden gravitational collapse, releasing gravitational potential energy that can create a supernova explosion.The most recent directly observed supernova in the Milky Way was Kepler's Star of 1604 (SN 1604); remnants of two more recent supernovae have been found retrospectively. Observations in other galaxies indicate that supernovae should occur on average about three times every century in the Milky Way, and that any galactic supernova would almost certainly be observable in modern astronomical equipment. Supernovae play a significant role in enriching the interstellar medium with higher mass elements. Furthermore, the expanding shock waves from supernova explosions can trigger the formation of new stars.