"BLACK MATTER" what is it? wheres it come from?


by arashbh
Tags: black matter
arashbh
arashbh is offline
#1
Feb21-12, 11:57 AM
P: 22
"BLACK MATTER" what is it? wheres it come from?
how is it related to its opposite force the BLACK ENERGY?
why is it so powerful?
why and why indeed LIGHT wouldn't go through it?
put your thoughts here and let's if we can come up with something......
Phys.Org News Partner Space news on Phys.org
Red moon at night; stargazer's delight
Computers beat brainpower when it comes to counting stars
Meteorites yield clues to Martian early atmosphere
DaveC426913
DaveC426913 is offline
#2
Feb21-12, 12:01 PM
DaveC426913's Avatar
P: 15,325
There is no such thing as black matter or black energy.

Perhaps you mean dark matter and dark energy?
arashbh
arashbh is offline
#3
Feb21-12, 12:21 PM
P: 22
Quote Quote by DaveC426913 View Post
There is no such thing as black matter or black energy.

Perhaps you mean dark matter and dark energy?
i think only the words are different
i wanted to have a little discussion over here about it if thats not a problem!

DaveC426913
DaveC426913 is offline
#4
Feb21-12, 12:26 PM
DaveC426913's Avatar
P: 15,325

"BLACK MATTER" what is it? wheres it come from?


Quote Quote by arashbh View Post
i think only the words are different
Well, your questions don't apply either.

They are not opposite forces. Dark matter is the name applied to an undetermined type of matter that seems to be affected by gravity but does not seem to interact with normal matter or light at all.

Dark energy is a term applied to whatever is causing the expansion of the universe.
arashbh
arashbh is offline
#5
Feb21-12, 12:38 PM
P: 22
and the dark matter basically make stuff stick together is that right?
galaxies would stay stiff by dark M and the universe being made of galaxies is expanding caused by dark E.. why is that?
im sorry if i ask basic question im new to cosmology
bapowell
bapowell is online now
#6
Feb21-12, 02:29 PM
Sci Advisor
P: 1,546
That's basically the correct distinction. Dark matter gravitates like ordinary visible matter, but it doesn't interact electromagnetically so it's effectively pressureless. This means that it easily clumps and plays an important role in the formation of gravitationally bound structures like galaxies.

As for dark energy, it gravitates differently. It is assumed to be smoothly distributed throughout the universe, not clumping like dark matter. Its gravitational behavior instead results in an accelerated expansion.

Though not directly detected, dark matter is supported by a variety of observations, including evidence from structure formation, the cosmic microwave background, and gravitational lensing. Dark energy, as DaveC mentions, is rather speculative; it's the name we give to the hypothetical source driving the expansion.
arashbh
arashbh is offline
#7
Feb21-12, 02:54 PM
P: 22
wow thanks
so heres the part i dont really get .. how it doesnt interact electromagnetically? based on that its not following the rules of physics as other matters would do.
because even energy cannot go through it, it should be intact am i right? then can we trace its root?
bapowell
bapowell is online now
#8
Feb21-12, 03:57 PM
Sci Advisor
P: 1,546
Quote Quote by arashbh View Post
how it doesnt interact electromagnetically? based on that its not following the rules of physics as other matters would do.
because even energy cannot go through it, it should be intact am i right? then can we trace its root?
First, not all matter interacts electromagnetically -- only matter with a net electric charge does. For example, neutrons are electrically neutral. I'm not sure what connection you are making between electromagnetism and the "intact" nature of matter. There are fundamental particles that are electromagnetically neutral yet still constitute matter, like the Z_0 boson.
Drakkith
Drakkith is offline
#9
Feb21-12, 05:48 PM
PF Gold
Drakkith's Avatar
P: 11,005
Quote Quote by arashbh View Post
wow thanks
so heres the part i dont really get .. how it doesnt interact electromagnetically? based on that its not following the rules of physics as other matters would do.
Well, unlike the known fundamental particles, we don't know anything about dark matter. We presume it is simply uncharged and only interacts through gravity, as odd gravitational interactions are our only clue that it exists. As Bapowell said not all matter interacts through electromagnetism. Neutrinos don't either, allowing them to pass through normal matter almost as if it wasn't there. The average neutrino could penetrate about a light year of lead before being stopped. Dark matter could simply be another particle that only interacts through gravity.

because even energy cannot go through it, it should be intact am i right? then can we trace its root?
Energy is not something that can get around on it's own. It's a property of matter and light, not something that exists on it's own. Since dark matter doesn't interact through any force other than Gravity, both matter and light will go completely through and bring their energy with them. (I've neglected talking about changes in gravitational potential energy for simplification through)
arashbh
arashbh is offline
#10
Feb22-12, 05:21 AM
P: 22
Quote Quote by bapowell View Post
. I'm not sure what connection you are making between electromagnetism and the "intact" nature of matter. There are fundamental particles that are electromagnetically neutral yet still constitute matter, like the Z_0 boson.
my misunderstanding about behaviors of dark matter, i remember an episode of HOW THE UNIVERSE WORKS that they were saying some galaxies seemed to be disordered it was caused by dark matter, their(galaxy's) lights couldn't get directly through it, they were forced to get around it.. thats why i said that nothing can make changes in their formation so they're intact.
now im thinking of something ... this universe is full of exact particles that are found in atoms
dark matter explains the neutron(sort of) and electrons are energy and protons generate gravity; if we put it this way this universe is actually an atom !
....
let me get back to dark energy.. isn't it just the "time" ? it is clearly causing us move forward. galaxies, clusters, super clusters are going somewhere in all directions, they are spending time due to the dark energy, make sense?
bapowell
bapowell is online now
#11
Feb22-12, 07:45 AM
Sci Advisor
P: 1,546
Quote Quote by arashbh View Post
if we put it this way this universe is actually an atom !
I really don't see this. Yes, the universe consists of all the fundamental particles that we know of, including bound states like atoms. How does this make the universe itself an atom?

let me get back to dark energy.. isn't it just the "time" ? it is clearly causing us move forward. galaxies, clusters, super clusters are going somewhere in all directions, they are spending time due to the dark energy, make sense?
Dark energy is causing space to expand (accelerate, actually). A stationary object in a static spacetime still experiences the passage of time. I'm unclear on the connection you are trying to make here.
Chronos
Chronos is offline
#12
Feb22-12, 08:04 AM
Sci Advisor
PF Gold
Chronos's Avatar
P: 9,178
Dark matter does not consist of neutrons, and there are not nearly enough neutrinos to account for all the missing mass in the universe [at least not any species currently known to science]. Neutrinos do, however, behave very much like dark matter in that they barely interact with other forms of matter. The big difference appears to be mass. There are three 'flavors' of neutrinos we currently know of and their mass is somewhere in the rage of .05 - .28 electron volts. The electron is a mountain by comparison at 931 MILLION electron volts. A more massive version of the neutron [e.g., WIMP] would be a perfect dark matter candidate. Neutrinos are enormously abundant in the universe, almost as numerous as CMB photons. If dark matter particles are similarly abundant, their mass need not be more than a few electron volts - still little more than a gnat compared to the 800 lb gorilla we call the electron.
PAllen
PAllen is offline
#13
Feb22-12, 08:38 AM
Sci Advisor
PF Gold
P: 4,860
Quote Quote by Chronos View Post
Dark matter does not consist of neutrons, and there are not nearly enough neutrinos to account for all the missing mass in the universe [at least not any species currently known to science]. Neutrinos do, however, behave very much like dark matter in that they barely interact with other forms of matter. The big difference appears to be mass. There are three 'flavors' of neutrinos we currently know of and their mass is somewhere in the rage of .05 - .28 electron volts. The electron is a mountain by comparison at 931 MILLION electron volts. A more massive version of the neutron [e.g., WIMP] would be a perfect dark matter candidate. Neutrinos are enormously abundant in the universe, almost as numerous as CMB photons. If dark matter particles are similarly abundant, their mass need not be more than a few electron volts - still little more than a gnat compared to the 800 lb gorilla we call the electron.
Just to correct a typo: mass of electron is just over .5 Mev = 500 Kev. Mass given is closer to proton/neutron mass. This doesn't change the main argument at all.
CaptFirePanda
CaptFirePanda is offline
#14
Feb22-12, 09:52 AM
P: 27
I believe he is making a comparison:

dark matter is to neutrons as energy is to electrons and gravity is to protons (whether this is a valid comparison at all is something I won't comment on)

and not trying to state what comprises dark matter.
bapowell
bapowell is online now
#15
Feb27-12, 06:52 AM
Sci Advisor
P: 1,546
Quote Quote by jagatpalv View Post
dark matter is really mysterious it is having lots of mysteries in it you should refer this http://scimad.com/dark-matter/
but still it is a mystery
It's still a mystery in the sense that we do not know what constitutes dark matter; however, we do know much about its properties. This knowledge is compiled from several observational sources. In addition, it might be possible to theoretically account for dark matter within fairly well-motivated extensions of the Standard Model of particle physics. So, it's not so mysterious -- why do you think it is still such a mystery?
tapasbhattach
tapasbhattach is offline
#16
Mar1-12, 05:49 AM
P: 4
Lai, Xiao-Yu of Peking University proposed that " Strange quark nuggets (SQNs) could be the relics of the cosmological QCD phase transition, and they could very likely be the candidate of cold dark matter if survived the cooling of the later Universe, although the formation and evolution of these SQNs depend on the physical state of the hot QGP (quark-gluon plasma) phase and the state of cold quark matter. We reconsider the possibility of SQNs as cold dark matter, and discuss the astrophysical consequences of primordial SQNs in the early and present universe. In the early Universe, the formation of black holes inside primordial halos could be faster than that in the standard scenario, and speed up the formation of the supermassive black holes at high redshift. In the present Universe, the capture of SQNs by pulsars could trigger star-quakes, which could be the mechanism for pulsar-glitches." - 1st Caribbean Symposium on Cosmology, Gravitation, Nuclear and Astroparticle Physics: STARS2011
1-4 May 2011: La Habana, Cuba

where as

Tomohiro Abe, Mitsuru Kakizaki, Shigeki Matsumoto, Osamu Seto. proposed that "Weakly interacting massive particle (WIMP) is well known to be a good candidate for dark matter, and it is also predicted by many new physics models beyond the standard model at the TeV scale. We found that, if the WIMP is a vector particle (spin one particle) which is associated with some gauge symmetry broken at the TeV scale, the higgs mass is often predicted to be 120--125 GeV, which is very consistent with the result of higgs searches recently reported by ATLAS and CMS collaborations at the Large Hadron Collider experiment. In this letter, we consider the vector WIMP using a non-linear sigma model in order to confirm this result as general as possible in a bottom-up approach. Near-future prospects to detect the vector WIMP at both direct and indirect detection experiments of dark matter are also discussed.-UT-HET-063,IPMU12-0029,HGU-CAP-14
e-Print: arXiv:1202.5902 [hep-ph]

Reference :
Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation - WMAP Collaboration (Komatsu, E. et al.) Astrophys.J.Suppl. 192 (2011) 18 . arXiv:1001.4538 [astro-ph.CO]

Bounds on universal extra dimensions - Appelquist, Thomas et al. Phys.Rev. D64 (2001) 035002 . hep-ph/0012100 . hep-ph/0012100,YCTP-P12-00,EFI-2000-48

Dark matter and collider phenomenology of universal extra dimensions - Hooper, Dan et al. Phys.Rept. 453 (2007) 29-115 . hep-ph/0701197 . hep-ph/0701197,FERMILAB-PUB-07-018-A

Electroweak symmetry breaking from dimensional deconstruction - Arkani-Hamed, Nima et al. Phys.Lett. B513 (2001) 232-240 . hep-ph/0105239 . hep-ph/0105239,HUTP-01-A024,BUHEP-01-06,UCB-PTH-01-15

The Minimal moose for a little Higgs - Arkani-Hamed, N. et al. JHEP 0208 (2002) 021 . hep-ph/0206020 . hep-ph/0206020,BUHEP-02-24,UW-PT-01-09,HUTP-02-A016

TeV symmetry and the little hierarchy problem - Cheng, Hsin-Chia et al. JHEP 0309 (2003) 051 . hep-ph/0308199 . hep-ph/0308199,HUTP-03-A051

Little hierarchy, little Higgses, and a little symmetry - Cheng, Hsin-Chia et al. JHEP 0408 (2004) 061 . hep-ph/0405243 . hep-ph/0405243

Little Higgs models and their phenomenology - Perelstein, Maxim Prog.Part.Nucl.Phys. 58 (2007) 247-291 . hep-ph/0512128 . hep-ph/0512128

Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC - ATLAS Collaboration . arXiv:1202.1408 [hep-ex] . CERN-PH-EP-2012-019

Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV - CMS Collaboration (Chatrchyan, Serguei et al.) . arXiv:1202.1488 [hep-ex] . CMS-HIG-11-032,CERN-PH-EP-2012-023

A Tool Kit For Builders Of Composite Models - Georgi, Howard Nucl.Phys. B266 (1986) 274 . HUTP-85/A060

Cosmic abundances of stable particles: Improved analysis - Gondolo, Paolo et al. Nucl.Phys. B360 (1991) 145-179 . UCLA-90-TEP-68

MicrOMEGAs 2.0: A Program to calculate the relic density of dark matter in a generic model - Belanger, G. et al. Comput.Phys.Commun. 176 (2007) 367-382 . hep-ph/0607059 . hep-ph/0607059,LAPTH-1152-06

Indirect search for dark matter with micrOMEGAs2.4 - Belanger, G. et al. Comput.Phys.Commun. 182 (2011) 842-856 . arXiv:1004.1092 [hep-ph] . IRFU-10-24,LAPTH-012-10.

LanHEP - a package for automatic generation of Feynman rules from the Lagrangian. Updated version 3.1 - Semenov, A. . arXiv:1005.1909 [hep-ph]

Supersymmetric dark matter - Jungman, Gerard et al. Phys.Rept. 267 (1996) 195-373 . hep-ph/9506380 . hep-ph/9506380,SU-4240-605,UCSD-PTH-95-02,IASSNS-HEP-95-14,CU-TP-677

Direct Detection of Vector Dark Matter - Hisano, Junji et al. Prog.Theor.Phys. 126 (2011) 435-456 . arXiv:1012.5455 [hep-ph] . IPMU10-0227,CALT-68-2815,MISC-2010-20

Nucleon strange quark content from two-flavor lattice QCD with exact chiral symmetry - JLQCD Collaboration (Takeda, K. et al.) Phys.Rev. D83 (2011) 114506 . arXiv:1011.1964 [hep-lat] . UTHEP-615,KEK-CP-241

Dark Matter Results from 100 Live Days of XENON100 Data - XENON100 Collaboration (Aprile, E. et al.) Phys.Rev.Lett. 107 (2011) 131302 . arXiv:1104.2549 [astro-ph.CO]

First results of XENON100 - XENON100 Collaboration (Schumann, Marc for the collaboration) PoS IDM2010 (2011) 029

Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope - Fermi-LAT Collaboration (Ackermann, M. et al.) Phys.Rev.Lett. 107 (2011) 241302 . arXiv:1108.3546 [astro-ph.HE]

PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy - PAMELA Collaboration (Adriani, O. et al.) Phys.Rev.Lett. 105 (2010) 121101 . arXiv:1007.0821 [astro-ph.HE]

Antiprotons from dark matter annihilation in the Galaxy: astrophysical uncertainties - Evoli, Carmelo et al. . arXiv:1108.0664 [astro-ph.HE] . DESY-11-135

Is the lightest Kaluza-Klein particle a viable dark matter candidate? - Servant, Geraldine et al. Nucl.Phys. B650 (2003) 391-419 . hep-ph/0206071 . hep-ph/0206071,ANL-HEP-PR-02-032,EFI-02-74

Significant effects of second KK particles on LKP dark matter physics - Kakizaki, Mitsuru et al. Phys.Rev. D71 (2005) 123522 . hep-ph/0502059 . hep-ph/0502059,ICRR-514-2004-12,STUPP-05-178

JCAP,1102,009

I have cited the latest of the 2 from http://inspirehep.net/search?ln=en&l...m=&rg=100&sc=1

I like this website for uptodate High Energy Physics (HEP) information system.


Register to reply

Related Discussions
Books like "A Brief History Of Time" and "The Black Hole War" Science & Math Textbook Listings 12
Do black holes "evaporate" or go "bang"? General Astronomy 31
Is the designation as "matter" vs. "antimatter" arbitrary? High Energy, Nuclear, Particle Physics 9
What is "Black matter"? General Physics 7