Supernovae Definition and 54 Threads

Is there any consensus as to how much of the primary cosmic rays come from supernovae, and of which type, how much from quasars, how much from kilonovae? How does the mass number distribution of primary cosmic rays compare against average of stars? Against Type I and II supernovae, and...

Hi! Please don't spare me any juicy details. I can take it! I'm specifically interested in type II supernovae and their stellar precursors in my following questions. Stars above the mass of 8 times the size of the sun go through successive burning phases in their cores, resulting in a cores of...

Hi all! It has been quite a while since I last posted here. Again. I'm currently interested in supernovae and the exotic stellar remnants that are left behind from such events. I'm interested in the physics and science surrounding this subject, it's something that I currently have an interest...

This Wikipedia particle says that neutrinos are generated: https://en.wikipedia.org/wiki/Supernova But this article (about SN1987A) seems to say that both neutrinos & antineutrinos were detected: https://en.wikipedia.org/wiki/SN_1987A

Hi! I've been browsing the internet for information about supernovae and I came across this chart describing 4 types of core collapse causes (the chart may have copied weirdly because not all the information fits into this text box): Cause of collapse Progenitor star approximate initial mass...

Here is the Physical Review article: "Supernovae sparked by dark matter in white dwarfs" "A ball of asymmetric dark matter accumulated inside a white dwarf and collapsing under its own weight sheds enough gravitational potential energy through scattering with nuclei to spark the fusion...

Hi, I am currently studying for a masters in Astrophysics and am in my Stellar Atmospheres module. One of the questions I have been asked is with regards to the shock breakout of supernovae. Basically, the question is which type of stars show the strongest shock breakout and why? My thinking...

Can anyone recommend papers that directly curve-fit redshift as a function of luminosity distance for type Ia supernova and gamma ray bursts? I am looking for papers that do not curve-fit the data via an assumed model, even one as simple as Friedmann–Lemaître–Robertson–Walker (FLRW) metric. I...

Homework Statement A binary stellar system is made of one star with ##M_1=15{M}_\odot## and a second star with ##M_2=10{M}_\odot## revolving around circular orbits at a relative distance of ##d=0.001pc##. At some point ##M_1## explodes in a supernovae leaving a neutron star of mass...

iPTF14hls was a supernova discovered in 2014. Typically they reach a brightness peak quickly and then fade over few months - but this star had several oscillations in brightness. To make it more confusing, archives from 1954 show a supernova at the same spot. News article This model can lead...

About 10 days ago, I read this in the Nature journal: http://www.nature.com/news/colliding-stars-spark-rush-to-solve-cosmic-mysteries-1.22829?WT.ec_id=NEWSDAILY-20171016 I quote: "Over the past decade or so, astrophysicists had come to believe that this was the most plausible mechanism to...

Sometimes when I read about supernovae I notice there are different types. I was wondering if anyone could explain to me how/why there are different types of supernovae.

Hi I am working on an assignment which is has asked us to derive an expression for a differential number count of supernovae in a euclidean flat non-expanding space. I am bit perplexed by this question and am wondering whether it is a trick question. We are allowed to do research to find an...

Do we know a what stage of a supernova gold is synthesized? And when the gold is ejected, are we talking about pebble size chunks of gold or mostly dust that later coalesce?

Which option is closest to scientists' current best estimate for the rate at which a supernova explosions occur somewhere in the milky way galaxy? a) once a day b) once a year c) once every hundred years d) once every thousand years From what I have found online, the current estimate is one...

I am trying to wrap my brain around the evidence for accelerating expansion of the universe from type 1a supernovae. From what I understand, it was first realized that the universe was expanding at an increasing rate from discrepancies between the calculated distances to type 1a supernovae using...

What would happen if there was a supernova explosion near a black hole ? Would it just sit there and absorb all the energy incident on it ? Or would it simply vaporize into elementary particles ? And if it does vaporize, could the remnants give us a clue as to the quantum state of matter inside...

I think that our current knowledge on the initiating mechanism of supernovae is that they happen due to neutrinos interacting with the inner layers of a star and then accelerating them away from the core. I am having some trouble in understanding that idea. Of course this could be plausible if...

http://science.nasa.gov/science-news/science-at-nasa/2013/10sep_firestation/ In recent decades researchers have discovered some strange things happening in the cloud tops. High above ordinary lightning, exotic forms known as red sprites and blue elves shoot toward the heavens, cold cousins to...

Hi, I'm new here. Can someone help me with several sets of questions? I know the estimated age of the Milky Way. There is information that there are various types of supernovae in the Milky Way that occur on the average of 2.2 to 2.7 per century. My first set of question: Is this...

Hello! I am looking for a catalog that contains redshift, modulus distance and position (if it is possible) of many type Ia supernovae as possible. I have found this: http://www.cbat.eps.harvard.edu/lists/Supernovae.html, but this link only has the position data. Does anyone know wher I...

Does anyone know the mathematical form of Type Ia supernovae light curves? I am trying to analyze supernovae data. I need to fit a function to the magnitude vs time data. So I require the mathematical form for magnitude as a function of time. If anyone has any idea about that, or can suggest a...

Ok, this is something that I've been trying to figure out for a while now. Where does the energy for a supernova explosion come from and if the star can produce this energy, then why does it collapse under its own gravity? Surely it would have the energy to continue on as a star in whatever...

I have a question about the formation of black holes. Correct me if I am wrong but as I understand it, if you have a massive enough star that when its used up all its fuel and collapses, it will overcome the exclusion principle and crush itself into a black hole. My question is, during this...

I've been an amateur quantum physicists for most of my life, and ever since 1998 I've been wondering about this issue, but I figured someone would address it. Now they've given the Nobel to the guy and I still don't understand something. Perlmutter says that galaxies are accelerating away...

In a galaxy 250 million light-years from Earth, astronomers have spotted a record-breaking seven supernovae all found at the same time. http://news.nationalgeographic.com/news/2011/10/111006-supernovas-universe-galaxy-evolution-arp-220-space-science/ In Arp 220, a galaxy 250 million...

Both of them have the same binary system with a white dwarf and a companion star which result in the same bang so what actually is the difference between type 1a supernovae and a novae?

With so much hype going around as to Betelgeuse turning into a supernovae in 2012, wonder whether it is possible to predict such an occurrence correct to at least a decade...

Was looking for information on the aforementioned Super and hypernovae. Any resources wud be nice as well as anything you might just know about them ! thanks in advance, Pretty Emlay xxx

Hi All Is it type Ia supernovae that detonate in a fusion explosion?

Hello everyone I hope you don't mind me asking a real silly question about the original evidence for dark energy. I've been reading about how Type 1a supernovae provided the initial evidence that the expansion of the universe was accelerating. They are able to do this because they are...

Okay, I am somewhat young (16) and i currently can't study anything at this level. But, I've always been intrigued about anything in outer space. And a thought came into my head today. I have a general idea on how supernovae and hypernovae are formed, but if you could, give a detailed answer...

Governato et al. have offered a solution to a long-standing puzzle about structure formation. Published in the current issue of Nature. http://arxiv.org/abs/0911.2237 Dark matter dynamics (esp. with supercomputer simulations) has already explained a lot about structure formation. For an...

Hi all, I am trying to understand the connection between the specific nucleosynthesis that occurs in each step of the explosion mechanism of type Ia supernova (SN Ia). Let´s see if I got it right, type Ia SN is the complete disruption of a white dwarf(WD) once it passes through the...

Hey all, It’s been a while since I’ve visited the forums but my question is strangely one that I’ve had a difficult time trying to find an answer for. I was wondering if anyone either knows or can point me to information regarding the effective destruction radius of a supernova, preferably...

http://arxiv.org/abs/0902.3446 So apparently gamma rays from nearby supernovae produce nitrogen oxide in the atmosphere. The team took 122-meter-long cores from Dome Fuji station in Antarctica and found three nitrogen oxide spikes in the 11th century. They think they know what two of them are...

Hey! I made a similar question in another post and it was really useful, but I'd like to learn more about this relation, and why the propieties of SNe Ia make them so special, so we can call them standard candels and how did they lead us to the discovery of Dark Energy. Thank you!:smile:

why is the temperature distribution of hot gases inside galaxies evidence for dark matter and why is Type 1a Supernovae evidence for dark energy

would star systems such as Procyon or Capella blow up as 1a supernovae?

hi i just wanted to ask if someone could explain this graph for me http://hyperphysics.phy-astr.gsu.edu/hbase/astro/univacc.html thank you

Some of my friends claim that the solar creation had something to do with a supernova. I have no idea about that. Can you please explain? Thanks

Hi all Can anyone help me how to distingush among them? Thank you.

Do all types of supernovae emit gamma rays? If so, is it an initial burst, or does the GRB last as long as the visible light? If so, is the GRB in all directions or just in jets? Thanks.

Is it true that on an average day on Earth, thousands of supernovas happen some place in the universe?

Do supernova explosions produce lumps of uranium or atoms of uranium?

of course I know that google knows the answer to any question, but it seems that there are limits. So when I want to test a certain hypothesis I need to have an overview of all known supernovaes, distance, size, etc, dated from say 30-50,000 years ago. So I typed in super nova index and that...

A http://www.arxiv.org/abs/astro-ph/0609616" claims that a super-Chandrasekhar Ia supernova has been found, and that "Super-Chandrasekhar mass SNe Ia should preferentially occur in a young stellar population." This, obviously, could have implications for cosmology. These "new" supernovae can...

Here is an interesting [and important] paper, IMO: The Hubble Constant: A Summary of the HST Program for the Luminosity Calibration of Type Ia Supernovae by Means of Cepheids Authors: A. Sandage (1), G.A. Tammann (2), A. Saha (3), B. Reindl (2), F.D. Macchetto (4), N. Panagia (4)...

Recent Supernovae Ia observations tend to rule out all the cosmologies by R. G. Vishwakarma, Zacatecas University. Time for a new standard candle, epicycle or paradigm? Garth

http://arxiv.org/abs/astro-ph/0507340 Nucleosynthesis of PopIII Core Collapse Supernovae and the Abundances of Extremely Metal Poor Stars Authors: Marco Limongi (INAF-OAR), Alessandro Chieffi (INAF-IAS) Comments: 6 pages, 4 figure, Proceedings of the IAU Symp. No. 228 "From Lithium to...