Why does not dark matter gather and form celestial bodies?How Does Dark Matter Form Lumps?Why does dark...
How to use Pandas to get the count of every combination inclusive
Can town administrative "code" overule state laws like those forbidding trespassing?
What typically incentivizes a professor to change jobs to a lower ranking university?
Where to refill my bottle in India?
Are tax years 2016 & 2017 back taxes deductible for tax year 2018?
How do we improve the relationship with a client software team that performs poorly and is becoming less collaborative?
Circuitry of TV splitters
A newer friend of my brother's gave him a load of baseball cards that are supposedly extremely valuable. Is this a scam?
Why has Russell's definition of numbers using equivalence classes been finally abandoned? ( If it has actually been abandoned).
A Journey Through Space and Time
Calculus Optimization - Point on graph closest to given point
How can bays and straits be determined in a procedurally generated map?
Why don't electron-positron collisions release infinite energy?
Is it possible to make sharp wind that can cut stuff from afar?
least quadratic residue under GRH: an EXPLICIT bound
Can you lasso down a wizard who is using the Levitate spell?
Infinite past with a beginning?
DOS, create pipe for stdin/stdout of command.com(or 4dos.com) in C or Batch?
How to determine if window is maximised or minimised from bash script
Is it legal to have the "// (c) 2019 John Smith" header in all files when there are hundreds of contributors?
What is the logic behind how bash tests for true/false?
Example of a relative pronoun
Showing the closure of a compact subset need not be compact
N.B. ligature in Latex
Why does not dark matter gather and form celestial bodies?
How Does Dark Matter Form Lumps?Why does dark matter form walls and filamentsDoes a black hole have any kind of mass?Is there a binary black hole system in the middle of the galaxy?A Theory of Almost Everything?Density of dark matter along the galaxyQuestions about shape of dark matter orbits in spiral galaxiesDark matter annihilation cross sectionWhy does dark matter form a halo, Unlike normal matter?Why does dark matter form halos?
$begingroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
$endgroup$
add a comment |
$begingroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
$endgroup$
add a comment |
$begingroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
$endgroup$
since the only thing we know about dark matter that it "attracts" and affect our Baryonic matter's momentum and speed, which means that it does have mass of a sort.
so why didn't we witness a darkmatter-darkmatter interactions in form of collisions of celestial bodies like stars, Black holes or other distinct things, what do we know about that?
PS: it would be very helpful for me if someone has an answer can cite it with a paper on the topic. thanks in advance!
particle-physics gravity cosmology astrophysics dark-matter
particle-physics gravity cosmology astrophysics dark-matter
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
asked 1 hour ago
NimbleDick CrabbNimbleDick Crabb
312
312
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 37 mins ago
innisfree
12k33162
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "151"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fphysics.stackexchange.com%2fquestions%2f471226%2fwhy-does-not-dark-matter-gather-and-form-celestial-bodies%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 37 mins ago
innisfree
12k33162
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
add a comment |
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 37 mins ago
innisfree
12k33162
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
add a comment |
$begingroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 37 mins ago
innisfree
12k33162
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
$endgroup$
The standard answer is that dark matter does not seem to interact strongly with itself (although self-interacting dark matter is an active research topic), and does not emit electromagnetic radiation. The latter property means that a clump of dark matter cannot lose energy by radiating it away, and will remain a diffuse clump. Ordinary matter can coalesce, heat up, radiate away the energy, and coalesce further. Hence dark matter seems to form diffuse halos that do not form celestial bodies.
edited 37 mins ago
innisfree
12k33162
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
edited 37 mins ago
innisfree
12k33162
edited 37 mins ago
innisfree
12k33162
edited 37 mins ago
innisfree
12k33162
12k33162
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
answered 42 mins ago
Anders SandbergAnders Sandberg
10.1k21530
10.1k21530
add a comment |
add a comment |
Thanks for contributing an answer to Physics Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fphysics.stackexchange.com%2fquestions%2f471226%2fwhy-does-not-dark-matter-gather-and-form-celestial-bodies%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
