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Talk:Quark star

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star would be used just to oppose the force of gravity. The gravitational binding energy of a gas star is about 1.1G(M^2)/R. Using the viral equation, if (Mc^2)/3 is equal to 1/2 of 1.1 G(M^2)/R, the radius R of this star equals 1.65GM/(c^2), or 0.82 the Schwarzschild radius. There is observational evidence that a large finite size star is contained in a black hole: Some super massive black holes have been observed spinning at about 1/10 RPM, which implies a star of very large radius. The existance of an about 0.82 Schwarschild radius star, instead of a conventional black hole point singularity, would probably mean the end of the conventional big bang model as coming from a point singularity. If 2 approximately equal mass 0.82 Schwarzchild radius stars merged the contents would be expected to be ejected at the speed of light from the contact point. This model could explain where our inflationary universe came from. It could also explain a possible ancient explosion at the center of M87.
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true. Therefore it is important to discuss strange quark matter in relation to quark matter and it is also important to discuss strange stars in relation to quark stars. If the Bodmer-Witten hypothesis is wrong, quark and strange stars will always by hybrid stars and could only exist as a subgroup of neutron stars. The whole idea of writing a separate article on quark stars, apart from neutron stars, is the Bodmer-Witten assumption, that strange quark matter is stable at low temperatures and pressures.
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and ultra relativistic stars, ie. something that could and should be discussed in a completely different fora than Knowledge. If you need me to clarify specific details as to why this has nothing to do with Quark Stars, please post your questions below. Most of them however, will explain themselves to you, if you study the subject of Quark Stars on your own first.
661: 369: 232: 754:. There is a Danish-language article on strange stars, so we get a nice interwiki link, and they make more sense if they link articles on the same things. But on the other hand, everything that one can say about a strange star is also something about strange matter, so we can't really remove the information from 1171:
Ah, I think I get your drift now? Yes, if the stellar core of the nova is small enough and light enough, it cannot resist the heavy radiation pressure bouncing back, when the neutron star/hybrid star (with quark matter core) is produced and the whole thing will disintegrate, just as you describes it.
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If neutrons in the core disintegrated collider results indicate that about 90% of the neutron mass should be converted to gamma rays (which would exit the star) and about 10% of the neutron mass should be converted to quark matter. Quark matter is mostly charged particles associated with high energy
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Revised: The contents of a light containing star would be expected to be ultra relativistic. If the pressure P of ultra relativistic material is given as (rho)(c^2)/3 , the total supporting energy or viral energy of this star would be ∫PdV = (Mc^2)/3, meaning a whopping 1/3 of the mass energy of the
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Hello to all above in this section on "Strange Matter". Quark matter is highly unstable except under very extreme conditions of high temperature and/or pressure. This instability might change radically, by the introduction of strange quarks, at least if the Bodmer-witten assumption turns out to hold
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I think it first and foremost belongs to the article on quark matter and strange quark matter respectively. It can be fitted in here as well, but it would need a solid explanation on how quark stars contribute with nuggets. They would indeed do if they exist in the first place, but it would need an
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Hello. What you are discussing here, has nothing to do with Quark Stars. If it is of any relevance at all, it would be on the talk page on black holes. I dont think it is even relevant there, as what you are writing about and searching for is an engaged discussion about your ideas about black holes
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Hello. You are right. As strange quark matter is a specific subgroup under quark matter, so are strange stars a subgroup under quark stars. The quark matter that might theoretically form in the core of neutron stars, can be very exotic and show a high degree of diversity though. Charm quark matter
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I don't think a star of ultra relativistic matter collapses even if its smaller than the Schwarzschild radius. This is because ultra relativistic pressure (like other pressures) increases as the inverse of R-cubed. The pressure increases faster than gravitational forces or gravitational potential
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radiating from the quark matter itself, just as well as from the degenerate neutron matter. The heat is caused by the supernova-process and is a manifestation of converted angular momentum and gravitational energy. Read about the Viral Theorem fx.. There is no differences from how ordinary neutron
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The presence of this section needs a good explanation. The quark states discussed here, is more related to neutron stars, than quark stars. The various quark states might form at the core of neutron stars, under the extreme pressure and temperature, but they are not equivalent to what we know as
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I have rewritten part of the article now and supplied some vital information on the differences and similarities of quark stars and strange stars. It can still be improved - especially the discussion on the binding forces of the "giant hadron" (not misspelled! :) and certainly the section on the
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It might be good to talk about Strange Matter/Quark Matter (I'd advocate the latter terminology) purely in terms of the physics of degenerate matter and the debate over it's plausibility (ie, does QCD allow the arrangement? Is the degeneracy pressure provided by the strong nuclear force strictly
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Generally speaking, it would also be a lot more constructive, if you put in specific cn-tags in the article, as I can not see where this article is lacking refs, except for a few issues where you have put up tags (thanks!). If anything should be improved, specific tags are needed, otherwise the
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as the article contains far too many statements that are not sourced. There's also "However, the investigating team of Prashanth Jaikumar, Sanjay Reddy, and Andrew W. Steiner made some fundamental assumptions, that led to uncertainties in their results large enough that the case is not finally
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page, there is "overwhelming evidence that the claimed pentaquarks do not exist". The idea of 4, 5, and 6 quark hadrons has been discarded by the particle physics community. But this is besides the point, theoretical hadrons have nothing to do with structure of a quark star. It would be more
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You are touching a very central issue in relation to stars in general here. A stars life is a balance between gravitational collapse and outward radiation pressure. If one of these opposing forces wins, the star will disintegrate. This holds true for all stars. A life in the balance :-)
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It is speculated and subject to scientific investigation if (strange) quark matter once formed, might in fact be stable under zero external pressure (ie. in interstellar space). Nuggets of (strange) quark matter is thus one of several candidates for the theoretical and unknown
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About the article of Prashant et.al.. What is your point? I have been involved with this article (and also done research on the subject) and I totally fail to see your point in this regard. Could you explain yourself, so someone (perhaps me) can help improve the content of the
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There is no particle reactions going on inside the quark matter, so there will be no production of light or other particles. Only when matter from the outside gets in contact with the qm, will there be some reactions and glitches will occur. Possibly gamma-glitches.
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However, for a neutron star to be born in the first place, the core will be rather massive and the gravitational pressure will be exactly huge enough to resist the radiation pressure from the conversion-processes. It all depends on gravitation and mass (almost).
715: 834:"Some of these quarks may then become strange quarks and form strange matter. The star then becomes known as a "quark star" or "strange star", similar to a single gigantic hardon (but bound by gravity rather than the strong force)" 1030:
I have done a little work now and put up a ref-improve in the section on alternative QCD states for example. going through the individual QCD states and reffing them should be a somewhat easy task and perhaps a bit fun even ?
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Simply stated, by a Quark star do you mean a neutron star with some quark matter production in the core? If so, shouldn't there simultaneously be much larger radiation production that the star would not contain?
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I have to say, is this an entirely appropriate line to include in the introduction to this article? Surely stating that a quark star is like a giant hadron is akin to stating that a neutron star is like a
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Whatever happens inside the quark matter, it will all be hold together by gravity and will not dissolve, due to the incredibly strong forces of the neutron degenerate lattice surrounding it.
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analogous to neutron or electron degeneracy pressure? Are exotic quark flavors required or implied by the theory?) and move the bulk of the astrophysical considerations to this writeup.
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Wired, Popular Science, and Astronomy Picture of the Day are not authoritative sources. Please replace these references with links to the papers they cite (or quote but don't cite).--
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and should quickly recombine in a neutron star to form conventional nuclei. I don't see how quark matter could exist in a stable neutron star core in the way you describe.
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The section at hand, has been discussed for various reasons previously. For the sake of structure and readability, I have collected these comments and discussions below.
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I believe I have cleared up this problem by now. From now on, the article calls for an elaboration on the characteristics of quark stars and strange stars specifically.
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I have done some preliminary work by explaining what quark and strange stars are in the new "Creation" section. The "Strange Star" section still needs to be rewritten.
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The star then becomes known as a "quark star" or "strange star", similar to a single gigantic hadron (but bound by gravity rather than the color force).
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settled." Did this team issue a revised report based on a better understanding of the data or is this an an academic pot-shot by someone else? --
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The force of gravity may have much to do with the binding of such a star, but wouldn't the color force also contribute to the binding energy? --
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All Strange stars are Quark stars. But, not all Quark stars are Strange stars. Other Quark Stars. Strange Exotic States and Compact Stars
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Is this a question to me? If so you need to use the ":" marks. Whoever the question was meant for, I believe I can answer it anyway:
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http://web.archive.org/web/20060313223759/http://www.popsci.com/popsci/aviationspace/a6885b4a1db84010vgnvcm1000004eecbccdrcrd.html
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http://web.archive.org/web/20090213124158/http://capca.ucalgary.ca:80/~bniebergal/webPHP/research.php?subdir=strangeQuarkStars
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Is it strictly necessary to have strange quarks? If not then "Strange star" requres splitting into a separate section.
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to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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pentaquark state with an antistrange quark & four light quarks consisting of up- and down-quarks only (qqqq
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Almost all of the particles suggested here contain strange quarks, and thus do not support your assertion.--
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If you have discovered URLs which were erroneously considered dead by the bot, you can report them with
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http://web.archive.org/web/20030402151744/http://www.wired.com:80/news/technology/0,1282,51943-2,00.html
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http://web.archive.org/web/20030418110053/http://curious.astro.cornell.edu:80/question.php?number=445
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for that content in the latter page, and it must not be deleted as long as the latter page exists.
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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This article was the subject of a Wiki Education Foundation-supported course assignment, between
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before doing mass systematic removals. This message is updated dynamically through the template
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I don't know about the rest of you(s) but my Giant Hardon defies gravity and is not bound by it.
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Not being an expert, I'd move for a second opinion, but I think that line should be reworded. --
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on April 2010. For the contribution history and old versions of the redirected page, please see
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light pentaquarks are grouped within an antidecuplet, the lightest candidate, Ө+ (big epsilon)
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An appropriate image needs to be added to this article, or the current one needs to be updated.
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H-dibaryon, a six-quark state with equal numbers of up-, down-, and strange quarks (uuddss)
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Zhitnitsky, Ariel R (2003). "'Nonbaryonic' dark matter as baryonic colour superconductor".
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http://www.popsci.com/popsci/aviationspace/a6885b4a1db84010vgnvcm1000004eecbccdrcrd.html
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This article needs a serious overhaul. I hope to get to it in the near future, now that
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If you found an error with any archives or the URLs themselves, you can fix them with
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As the article is now here in 2014, I can see that this issue is no longer a problem?
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http://www.capca.ucalgary.ca/~bniebergal/webPHP/research.php?subdir=strangeQuarkStars
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As of now, the section on Strange Stars does not describe what a strange star is.
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Pages within the scope of WikiProject Astronomical objects (WP Astronomy Banner)
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I can't decide whether strange stars deserve their own article, separate from
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See discussion under "Strange Matter" above. And my comment specifically :-)
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can also be described by the diquark model of Jaffe and Wilczek (QCD)
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pentaquark states were first proposed with a charm anti-quark (qqqs
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Be more analytical about that! It's fundamentally important!
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quark star = electroweak star / black hole = strong force star
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Jaffe 1977, suggested a four-quark state with strangeness (qs
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This section should be deleted. First of all, to requote the
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When you have finished reviewing my changes, please set the
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that I've moved here... Oh, I'll think about it later... --
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Please place new discussions at the bottom of the talk page.
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http://www.wired.com/news/technology/0,1282,51943-2,00.html
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for additional information. I made the following changes:
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Size of Quark Star composed of ultra relativistic material
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http://curious.astro.cornell.edu/question.php?number=445
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Witten, Edward (1984). "Cosmic separation of phases".
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Please read the article on what defines a Quark Star.
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Knowledge level-5 vital articles in Physical sciences
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Wiki Education Foundation-supported course assignment
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