![]() |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
![]()
The french astronomy magazine "Ciel et espace" has published a very
interesting article about black holes and dark matter. They say that Simeon Bird and also Sebastien Clesse say that the presence of "primordial" black holes could very well explain dark matter. It is a pity that the article of Ciel et espace doesn't give any references. Looking for Simeon Bird in Arxiv gave this: http://lanl.arxiv.org/pdf/1608.06699 [[Mod. note -- That url style is double archaic. The modern url for that paper is http://arxiv.org/abs/1608.06699 -- jt]] Where Mr Bird speaks about the possibility of detecting a gravitational wave background due to primordial black holes. Another article (from May this year) is: http://lanl.arxiv.org/pdf/1603.00464 Did LIGO detect dark matter? [[Mod. note -- The modern url for this paper is http://arxiv.org/abs/1603.00464 -- jt]] Where he says that primordial black holes of about 30 solar masses would be quite capable of giving the needed dark matter characteristics. It would be interesting if the specialists here would look at those explanations because they seem more related to physical reality than all the WIMP theories... from a layman point of view of course. But besides exotic explanations as primordial black holes, what about normal black holes? What about the other unseen masses that we have recently discovered? Galaxies seem bigger than we thought, whole galaxies composed of very few stars, almost invisible, appear now in our detectors as we improve observations. Could it be that simply dark matter is just that: matter that doesn't emit a lot of radiation and because of that, we do not see it? DARK: radiating, admitting, or reflecting little light http://www.dictionary.com/browse/dark?s=t |
#2
|
|||
|
|||
![]()
In article ,
jacob navia writes: The french astronomy magazine "Ciel et espace" has published a very interesting article about black holes and dark matter. They say that Simeon Bird and also Sebastien Clesse say that the presence of "primordial" black holes could very well explain dark matter. Where he says that primordial black holes of about 30 solar masses would be quite capable of giving the needed dark matter characteristics. It would be interesting if the specialists here would look at those explanations because they seem more related to physical reality than all the WIMP theories... from a layman point of view of course. Check out arXiv:1607.06077. A very, very thorough paper. Highly recommended. But besides exotic explanations as primordial black holes, what about normal black holes? BBN. Big-bang nucleosynthesis. We have good upper bounds on the total amount of baryons. Much too low to be "the" dark matter. What about the other unseen masses that we have recently discovered? BBN. Big-bang nucleosynthesis. We have good upper bounds on the total amount of baryons. Much too low to be "the" dark matter. Galaxies seem bigger than we thought, whole galaxies composed of very few stars, almost invisible, appear now in our detectors as we improve observations. BBN. Big-bang nucleosynthesis. We have good upper bounds on the total amount of baryons. Much too low to be "the" dark matter. Could it be that simply dark matter is just that: matter that doesn't emit a lot of radiation and because of that, we do not see it? DARK: radiating, admitting, or reflecting little light http://www.dictionary.com/browse/dark?s=t BBN. Big-bang nucleosynthesis. We have good upper bounds on the total amount of baryons. Much too low to be "the" dark matter. "Dark matter" is something of a misnomer. It is actually TRANSPARENT. Yes, it does not emit light, nor reflect it, but it does transmit it. |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
What if (on 25,000 posts) | G=EMC^2TreBert | Misc | 1 | January 10th 15 11:50 AM |
Not all my New Posts Are Showing Up ??? | G=EMC^2[_2_] | Misc | 20 | April 21st 12 06:37 PM |
OT Ot posts | VicXnews | Amateur Astronomy | 5 | August 19th 07 04:11 AM |
where's the posts? | [email protected] | Space Shuttle | 7 | January 4th 07 04:52 AM |
very interesting how 20-50 posts were back timed to flood betwwenthe 30 secondes between my two posts | Rick Nelson | Space Shuttle | 3 | July 23rd 05 11:13 AM |