Questions tagged [supernova]
A supernova is the explosive death of a star.
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Can kink oscillations in supernovae magnetic fields accelerate cosmic ray protons beyond the GZK limit?
Kink oscillations in coronal magnetic loops may be heating the ions in the sun's corona up to 10 million K and beyond. Could such oscillations in supernova impart enough extra energy to protons to ...
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What photon energy is needed to photodissociate large elements?
During core collapse, the heat and pressure produces photons with energy levels that photodissociate iron. I was wondering what photon energy is required to do such a thing?
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What is the correlation between the Hubble tension and Dark Energy?
When Dark Energy was first discovered it was because we noticed that distance type 1A supernovae were dimmer given their perspective redshifts.
However, to determine the Hubble constant in the late ...
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Neutrinos from a Type 1a Supernova
How much energy does a Type Ia Supernova produce in the form of neutrinos?
I know that a Type II Supernova produces around $10^{45}$ joules worth of neutrinos, but not the amount produced by a Type 1a ...
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What's the nearest star that could go Supernova in the near future?
https://en.wikipedia.org/wiki/IK_Pegasi B is the nearest supernova candidate, but that white dwarf that's part of the system won't go supernova for around 2 billion years.
What's the nearest star that ...
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Why are black holes sometimes formed without supernovae?
I've heard that very massive stars can sometimes collapse into black holes without creating supernovae.
How does this happen?
(I suspect it's something to do with the relative lack of Urca process ...
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Absence of Coulomb's force [closed]
I am interested in understanding the potential consequences if Coulomb's force were to suddenly vanish on the behavior and interactions of various objects. If this fundamental force suddenly ceases to ...
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Is it possible to witness supernova events from the past? Do they repeat?
Astrophysicist I know recorded one in 2008. Later found to be exactly as one that happened in 1988. Could this actually be the same? Do they repeat?
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How many type II supernovae are there per stellar mass formed?
I have been searching for the number of type II (core-collapse) supernovae per unit of stellar mass formed.
It is my understanding that a star must have an initial mass of at least 8 times and no more ...
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Why don't less massive stars explode in form of supernovas?
I'm a high school student with a question about supernovas and the life cycle of stars. I understand that supernovas occur in massive stars when they run out of fuel and collapse, resulting in a ...
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Plotting the bipolar neutrino oscillations in supernova
everyone. I am trying to study the neutrino oscillation in a core collapse supernova. In certain situations neutrinos in supernova can undergo what is called a "bipolar" oscillation. ...
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Question on the relation between the Hubble constant and the absolute magnitude of Type Ia supernovae
I would like to ask a question about the relation between the Hubble constant and the absolute magnitude of supernovae
I have read that supernovae alone cannot fix $H_0$ and that there is a ...
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Pair-instability supernovae: how does it happen?
How does the formation of electron positron pairs increase the energy density and softens the EOS?
I trrying to understand the pair instability supernova. In many texts and articles, it is written ...
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Could we derive the mass of neutrinos using a supernova and gravitational lensing?
There are a lot of questions on this site about getting neutrino mass from timing the arrival of neutrinos vs light from a supernova, I believe this is different.
If we see a galaxy that is ...
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Supernovae apparent magnitude in a simplified LCDM model
I want to generate some fake apparent magnitude of supernovae Ia at different redshift using the LCDM model and the fiducial absolute magnitude of supernovae Ia (-19.35) and I want to compare it with ...
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Shock when a supernova explodes
I have been reading that when supernovae explode, they produce (Shockwaves) which act as cosmic accelerators.
I do not understand, what is meant with "shock" (partially because I do not ...
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At what average rate do supernovas happen?
By average rate $R$, I mean I want an answer with units $$[R]=\frac{\text{supernovas}}{\text{length}^3 \cdot \text{time}}$$. That is to say, if I consider a huge volume $V$ and a long timeframe $T$, I ...
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Do supernovas vaporize the local space rocks 10 Pluto distances away?
In a follow-up to this question,
What would it be like to watch an average space rock / ice comet at 1-20 Pluto distances from a supernova of $10^{44}$ joules?
At what proximity would they become ...
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Supernova Observation and Hubble Parameter
“Their observations measured the evolution of the Hubble parameter over time by constructing a Hubble diagram: a plot of distance modulus versus redshift (Figure 11.33). For small $z$, the Hubble ...
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Where is the remnant of the supernova that killed off the Megalodon?
The claim is that a supernova about 150 light years from earth triggered a mass extinction about 2.6 million years ago which, among other things, killed off the Megalodon.
https://earthsky.org/earth/...
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Supernova light flash propagating through universe
Let the spherical light flash of a Supernove expand with c through the universe. Provided that the size of the unverse is limited, that sphere of light would inevitably reach a hypothesized end of the ...
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How can we extract the Doppler shift of supernovae?
My understanding is that supernovae are used as standard candles, whose spectral lines indicate the recession velocity of the host galaxy.
But the material from the supernova is ejected at a ...
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What would happen to a star caught in the path of an astrophysical jet?
The question pretty much captures it. What would happen to a star caught in the path of an astrophysical jet? I imagine the distance to the source of the jet, and the power of the source, matter most ...
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Could the center of the galaxy explode as a result of a chain reaction of stars going supernova?
I was reading "Ringworld" by Larry Niven. I'll spare you most of the details of the story, and say that one of the parts of the plot is that the center of the Milky Galaxy blows up, because ...
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Could anything ever be brighter than the sun in our sky?
Is there anything that could explode or exist that would appear brighter than the sun in our sky? There was that meteor in Russia in 2013 where it appears brighter than the sun. However, is there a ...
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When a neutron star explodes, its gravity weaken so neutronium may fission, is there a mass defect as lighter elements than neutronium form?
When a neutron star explodes, its gravity weaken so neutronium may fission, is there a mass defect as lighter elements than neutronium form? As we get towards iron energy is released? Or not?
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Experimental Evidences against Dark Energy
Subir Sarkar proposed that dark energy does not exist, i.e. the cosmological constant of our universe may not be positive (https://arxiv.org/abs/2106.03119). His stance was based on the 740 type Ia ...
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Would a supernova 1A appear to last longer if it were more distant and does it depend linearly on measured cosmological redshift?
Would a supernova 1A appear to last longer if seen more distant and does this depend linearly on measured cosmological redshift? I asked a question on a very popular radio station where they talked ...
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Confusion with light year distance and space events
I had read that the Betelguese star may be going supernova in may of 2022. Now it is about 500 Light years away, so if we see a supernova explosion in may, then does that mean it occurred about 500 ...
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Does a core collapse supernova emit detectable gravitational waves?
I've read that LIGO will be the first thing to detect a "nearby" core collapse supernova, because the neutrino pulse travels slower than light, and the light is trapped inside the star for ...
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Why does the estimation of the distance of supernovae depends on the cosmological model?
I was reading a paper from arxiv (https://arxiv.org/abs/1312.5798) when I stumbled upon this passage at pag 4
"However, even at low redshifts, there are limitations to how well the
Type Ia ...
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Energy released from forming a black hole?
Gravitational collapse release potential energy, in some cases a huge amount of it. In the case of a black hole, that collapse goes to "infinity" which suggests the release of "infinite&...
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Possible relation between internal and external magnetic field in Neutron Stars
I am wondering about a topic that disturbs me and regarding which I haven't found enough literature about.
Neutron stars are thought to be highly magnetised objects. Generally one makes the ...
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Calculation of the Collapse of Star into Black Hole [closed]
Using equations or a method of calculation using general relativity, how could one calculate the collapse of a star into a black hole?
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Redshift graph of Type Ia supernova: Two case
The redshift graph obtained from a well-known supernova study appears in two cases in Google search.
When I find the relevant data, regardless of whether the y-axis is set to distance or grade, the ...
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Is the internal energy of a supernova blast wave always 72% of the initial energy released?
In Astrophysics, an A-Z Introduction, Page 67, Patrick Betts states that in the Sedov-Taylor solution for a blast wave, the temperature of a supernova shell decreases over time, but the internal ...
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Is a gamma ray burst cylindrical (like a beam) or a cone? Could one hit both Earth and Mars at the same time?
I've always seen a GRB as a beam in various depictions. Can this beam be as wide as the distance from Earth to Mars? As in, could the beam be 400 million km in width as it travels through space?
Or is ...
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Where can I find the latest Cosmological Parameters derived from SNe Ia magnitudes?
I'm investigating the current crisis in Cosmology. I saw Dr. Becky quote the Hubble Constant, $H_0$, from Supernovae (SNe Ia) as 74.03. I'd like to punch the latest figures into my models. Does ...
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Hubble constant, Riess and why has $q_0 = -0.55$ been used?
Lot's of scientists, including Riess, have done great work in trying to determine the Hubble constant, both from observation and theory. As everyone will know there still exists the problem with the ...
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Black hole supernova [closed]
This is a question about my intuition of black holes.
Assumption: The creation of a black hole follows the same physics as the creation of stars. A star can supernova, I'm assuming a black hole also ...
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If a very distant supernova has a high Doppler effect redshift do our eyes see its evolution picture like in 'slow motion'?
If a very distant supernova has a high Doppler effect redshift do our eyes see its evolution picture like in 'slow motion'? If a same type of supernova apparently lasts longer if it has more ...
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Can the amount of mass of a supernova star force the expelled material to return to the origin of the explosion?
Can the amount of mass of a supernova star force the expelled material to return to the origin of the explosion?Like in the case when a rocket lounched from Earth has not suficient starting velocity ...
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How do we obtain matter-lambda curve?
I have 400 supernovas type Ia's distance modulus and its error and redshift.
how can I obtain an elliptic curve like the one in image for my datas?
where did that elliptic came from?
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Relativistic Jets in Black Holes
It is understood till now that nothing is faster than speed of light and we also know that even light cannot come out of black hole(that’s why the name black). So does that mean that the Relativistic ...
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Pair-instability supernovae: a thermodynamic perspective
The discovery of a black-hole pair with "forbidden" masses has gotten me trying to understand pair-instability supernovae. A well-crafted sentence from a recent paper gives the explanation
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Black Hole Formation
If you plot a space-time diagram of an object falling through the event horizon of a black hole, and draw the past and future "light cones" of the object at every point, wouldn't the point ...
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Could you know in advance specifically when a star will go supernova?
I've been thinking about star trek 2009 and star trek Picard in which they happen to talk about a sun inside a fictional solar system which goes supernova destroying a particularly important planet to ...
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How close would a supernova be to endanger the astronauts on the ISS?
How close would a supernova be to endanger the astronauts on the ISS?
Would Betelgeuse be close enough?
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Understanding the Chandrasekhar limit for white dwarfs and its relation with supernovas
So if I understand correctly, the Chandrasekhar limit ($\sim 1.4 \ M_{\odot}$) is the maximum mass that a white dwarf can have. Beyond this mass, the degeneracy pressure of the electrons can no longer ...
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Would a “black hole bomb” using dyson sphere and superradiant scattering destroy the blackhole? [closed]
I watched part of this Kurzgesagt video (link sends you to the video part)
https://youtu.be/ulCdoCfw-bY?t=323
and part of this pbs spacetime video (link sends you to the video part)
https://youtu.be/...
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