Supernova Definition and 193 Threads

Hi Everyone! I am a 5th grader and really interested in Astronomy. I decided to do a research project on Supernovae for my Quest class this year. Part of the project is to talk with others who are just as interested in Supernova explosions as I am and find out what you think. Here are my...

Hi, I have an image of a graphic describing the spectrum of a supernova Ia, the problem is that I don't really know how to read it. I'd like to know if there's any importance in this image that can drive us to think about dark energy (or accelerated expansion). The explanation of the graph...

If a 10 solar mass star explodes, leaving behind a 5 solar mass black hole, and blowing off an idealized spherical symmetrical (5 solar mass) neutrino shell, would the gravitational field (i.e. curvature of manifold) change? http://en.wikipedia.org/wiki/Supernova p.s. addendum: could Newton...

In a type 1b core-collapse supernova there is an initial Xray flash before the visible explosion. This was theorized to happen but nobody had seen it until this year. In January this year the Swift Xray satellite which can see Xray just happened to be looking in the right place (studying...

I ran across some article that pointed to this research: http://www.omatumr.com/picpages/snexplo.html The theory states that Sun formed from accretion of supernova remnants back into/onto its core. Now, my scientific background is quite limited but this theory seems to me more realistic...

Suppose a spherical shell identified as a supernova remnant is observed with radius r and with outward expansion speed v. Assume the mass density of the ambient medium to have the uniform value "ro_0". then the supernova remnant must have swept up mass M = ((ro_0)*4pi*r^3)/3. Let the original...

Can someone explain to me how shock waves from supernova or stellar winds can generate a superbubble? Does the energy from the shock get converted to thermal energy through compression?

When a supernova occurs is it expected that the gravity wave will reach a point at the same time as the light?

What is the relation between gamma ray bursts (GRBs) and supernova? Thanks

How certain is the distance to the most luminous supernova? Authors: H. Arp Comments: 5 pages, 3 figures Subjects: Astrophysics (astro-ph) A recent supernova has been reported as exceeding ``the light output of an ordinary supernova by at least two orders of magnitude''. It is noted that...

I read in various places that a supernova can briefly outshine a galaxy, given the number of stars in our galaxy would it be fair to say that there have been a number of SN in our galaxy since mankind evolved ? If so what would be the effect on our planet of a SN in the galaxy ? Would the...

I’d be grateful if someone could shed some light on how we know the expansion of the universe is accelerating by the luminosity of supernova types 1a? I'm currently reading 'The Extravagant Universe' by Robert Kirshner and he talks extensively about searching for supernova. While this is done in...

It is my general understanding that once a star goes supernova, the remnant core of the dead star will (always?) gravitationally contract into either a neutron star, or if massive enough, into a black hole. However, does current observation/model rule out a scenario whereupon a star goes...

Does 1a type supernova release the same amount of neutrino as 2 type supernova?

I've read in several news and science sites that a star roughly 7000 ly away from the sun is going to become a supernova in a very short time. Most science websites say that due to the distance of the star and Earth's protective atmosphere this supernova will not pose any risk to life on...

http://science.nasa.gov/headlines/y2007/07may_bigsupernova.htm?list45222 "Of all exploding stars ever observed, this was the king", said Alex Filippenko, who leads two of the observation teams involved in the discovery. The star that exploded was 150 times as massive as the sun. The explosion...

I understand that main sequence/white-dwarf binary systems are the cause of type Ia supernovae. Is it possible that the Sirius A/B system could go supernova? The white dwarf, Sirius B, is an unusually large dwarf, about 1 solar-mass. While Sirius A is a 2.1 solar-mass main sequence star. The...

I tried and I got a ridiculous large number for the neutrino mass. I basically used E=\gamma m c and then, for 10 MeV neutrinos, time taken is t + 10 seconds to reach Earth, for 50 MeV neutrinos, time taken is t seconds. Speed = \frac{100 000}{(t+10)} for 10 MeV and Speed = \frac{100 000}{t}...

http://www.cfht.hawaii.edu/Science/CFHLS/MidTermReview/CFHTLS-SNLS-SACreview2005.pdf http://www.cfht.hawaii.edu/SNLS/ The SNLS survey consists of: A large imaging survey at CFHT The CFHT Legacy Survey aims at detecting and monitoring about 2000 supernovae with Megaprime at the...

I'd like to examine the experimental side for a moment, not the theoretical. Would the non-differential (after very long distances and time, and taking into account the different production mechanisms) in the arrival of light and neutrinos from supernova 1987a constitute strong experimental...

Rich Firestone a nuclear expert, has been working for years now on the hypethesis that the North American megafauna (mastodons, woolly mammoths etc) went extinct due to a supernova. He presented this idea on two recent congresses so it's getting some media coverage now...

Will on spring break earlier this year my dad informed me of a physicist who had recently passed away and who was responsible for detecting that all elements up to carbon(?) are formed in supernova. I have had a hard time searching for information on this man and his work and was wondering if...

I'm not usually a big fan of advertising, but the MEADE ad for the LXD-75 in December's Sky and Telescope was way cool. It is the story of the discovery of SN2005cs in M-51 this spring, by Wolfgang Kloehr. http://www.dsi-astronomie.de/Bericht_EN.htm" site has the discovery story in blog form...

a planet moves around a star. (mass of planet << mass of star). the star undergoes a supernova explosion and loses 20% of its mass. the explosion does not directly affect the motion of the plant at that instant. how would this change the angular momentum of the planet ant the shape of its orbit...

a supernova can out light a entire galaxy. I've read it can give out about 10^44J of energy is there anyone of you who now the amount of energy released mor exacly or even better know how to calculate it? i love calculating stuff.

Can a Black Hole create Supernova? Is it possible that a Black Hole gets too big, and then just explodes under the pressure of it's own mass. Like a balloon that explodes because we blow it to much. Is it possible that a Black Hole can have a critical mass at which it simply explodes? :confused:

What could those two things have in common? Vela-X exploded some 11,000 years ago. How do we know that 11,000 years, was it carbon dated somehow? Because if so then the calibrated date to calendar years would have been 13,000 years. Could that have caused a significant increase in cosmogenic...

Can anyone point me how to: Work out the number of Supernova's that would have occurred in the Universe from the big-bang up to the present time? Basically I want a good idea of how many Type 1 or type 2 supernova's have probably occured, thanks.

Suppose there were a nearby supernova, say 10 to 20 lightyears away. It's not close enough to incenerate the earth. Would such an event cause the solar wind to become swept away? If so, would there come a great earthquake as the wave went by the earth? I suppose that the gravity of such a wave...

I have a question regarding Supernova SN1987A. I was wondering if anyone could tell me if the gas ring that surrounds it was the result of the explosion itself, or if it was there prior to it?

As I understand it, a Type II supernova occurs because the collapsing neutonium core of a dying large star overshoots its stable neutron degenerate radius and therefore rebounds, blasting the leftovers out into space. Is this correct? How, then, does a dying extremely massive star create a...

Io is the nearest supernova!? It is shown that space bodies expand and then collapse on their sources in supernova like explosions [1]. Therefore the nearest supernova is Io. The hot volcanic nature of Io [2] indicates near collapse at cosmic time scales. We can only hope that our much smaller...

What is the nearest supernova candidate (maybe Betelguese?) to the Earth?

I have been reading up on some theoretical ideas for supernovai etc..etc It is interesting that there may be some correllation between Blackholes and AGN, and consequently Stars going Supernova. Does anyone know if what I am going to state has been looked into? It seems probable that...

I'd appreciate it if I could get a little help on this one, I'm confused about how this is done. I know there are numerous papers out there about how to do this based on the SN1987A event that was detected with KII and IMB. The problem in my textbook asks me to make a rough estimate of the...

Tycho Brahe observed the first supernova in 1572. My question is, did he name it. Everyone names the first new star or moon or whatever it be that they personally found. So did Brahe name his finding in the constellation Cassiopeia. Thanks for you time Phil

what is the distance at which the explosion of a supernova could wipe out all life on Earth ?

WOW! BEAUTIFUL! http://www.cnn.com/2004/TECH/space/02/20/shc.hubble.supernova/index.html

I came across Ned Wright's webpage http://www.astro.ucla.edu/~wright/tiredlit.htm which states that alternative explanations for the redshift of galaxies would not be consistent with the z-dependence of supernova lightcurves. However, this assertion is not further substantiated and as far as...

This is something that mystifies me -- If the first stars were composed of only hydrogen and helium, why does a Type 1a Supernova show virtually no hydrogen in its spectrum? It seems logical that we would see an abundance of hydrogen. Thanks!

http://www.supernovae.net/isn.htm this link gives a listing of supernova discoveries. i am atempting to build a picture of the evolution of the universe ,ie how many stars go supernova, how many pulsars are formed, how many stars are formed etc, etc. can anyone give me some numbers...

Is there any supernova candidate in the neighbourhood of the earth, near enough to be able to annihilate us due to the radiation? Which is the minimum distance a supernova can stay whithout friying us? anybody knows?

fire.biol.wwu.edu/trent/alles/Origin_of_Elements.pdf In this source Alles gives a detailed description of the mechanism underlying Type Ia supernovas----so that one sees why they always release about the same amount of energy and can be used as standard candles for measuring distance. But he...