Comments on: Dark Matter Exists http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/ Sat, 20 Apr 2013 10:44:00 +0000 hourly 1 http://wordpress.org/?v=3.4.2 By: Astronomy Cast http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19726 Astronomy Cast Fri, 26 Jan 2007 23:15:11 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19726 [...] Cosmic Variance on dark matter. [...] [...] Cosmic Variance on dark matter. [...]

]]> By: Salad Is Slaughter - Thoughts from a “D” List Blogger » Taking the Easy Way http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19724 Salad Is Slaughter - Thoughts from a “D” List Blogger » Taking the Easy Way Sat, 20 Jan 2007 16:55:21 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19724 [...] Meanwhile, the important story this week is the discovery of direct evidence for Dark Matter.  Here is something fundamentally new that expands our understanding the universe and opens up whole areas for research. The news stories dutifully reprinted the press release but the lack of in depth stories was telling. The news media could have written articles that helped educate people about what the discovery means, how it ties in to the Big Bang, Dark Energy, the modified gravity hypothesis, and so on. If any of the big boys were carrying these stories, I missed them. [...] [...] Meanwhile, the important story this week is the discovery of direct evidence for Dark Matter.  Here is something fundamentally new that expands our understanding the universe and opens up whole areas for research. The news stories dutifully reprinted the press release but the lack of in depth stories was telling. The news media could have written articles that helped educate people about what the discovery means, how it ties in to the Big Bang, Dark Energy, the modified gravity hypothesis, and so on. If any of the big boys were carrying these stories, I missed them. [...]

]]> By: Tim Hammond http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19723 Tim Hammond Thu, 11 Jan 2007 17:28:11 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19723 Correction 0f wrong email address on entry 194. Correction 0f wrong email address on entry 194.

]]> By: Tim Hammond http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19722 Tim Hammond Thu, 11 Jan 2007 17:24:45 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19722 From the planetary velocities around the sun and the stellar velocities around the centre of our galaxy, there does not seem to be any dark matter in our solar system or galaxy. Why is this? From the planetary velocities around the sun and the stellar velocities around the centre of our galaxy, there does not seem to be any dark matter in our solar system or galaxy. Why is this?

]]> By: COSMOS Reveals the Cosmos | Cosmic Variance http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19707 COSMOS Reveals the Cosmos | Cosmic Variance Mon, 08 Jan 2007 18:20:58 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19707 [...] It is, needless to say, really cool. The image itself is not where the real science lies, of course; it’s spatially distorted, and very hard to show error bars in a 3-d plot. But there is definitely important science lurking in the details; for example, they seem to find dark-matter concentrations with little or no ordinary matter in the same place. It’ll take some work to figure out whether this is easily compatible with the theoretical models (one could imagine dissipative effects clearing baryons out of a region, leaving dark matter behind, in a mini-version of the Bullet Cluster), or whether we’re going to be challenged. Fun either way! [...] [...] It is, needless to say, really cool. The image itself is not where the real science lies, of course; it’s spatially distorted, and very hard to show error bars in a 3-d plot. But there is definitely important science lurking in the details; for example, they seem to find dark-matter concentrations with little or no ordinary matter in the same place. It’ll take some work to figure out whether this is easily compatible with the theoretical models (one could imagine dissipative effects clearing baryons out of a region, leaving dark matter behind, in a mini-version of the Bullet Cluster), or whether we’re going to be challenged. Fun either way! [...]

]]> By: helena http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19725 helena Tue, 19 Dec 2006 16:52:31 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19725 Ooo very intresting and all, but theres so much to read and such complicated words, i just need a definition :D Good stuff though Ooo very intresting and all, but theres so much to read and such complicated words, i just need a definition :D Good stuff though

]]> By: Coast to Coast | Cosmic Variance http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19704 Coast to Coast | Cosmic Variance Sat, 02 Dec 2006 03:02:10 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19704 [...] Dark Matter Exists [...] [...] Dark Matter Exists [...]

]]> By: </depesz> » Blog Archive » ciemna materia http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19530 </depesz> » Blog Archive » ciemna materia Sat, 18 Nov 2006 16:35:30 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19530 [...] informacje “po ludzku” (aczkolwiek w jÄ™zyku angielskim) można znaleźć tutaj, natomiast dla chÄ™tnych (i majÄ...cych sporÄ... wiedzÄ™) jest dostÄ™pny oficjalny tekst (nie wiem jak przetÅ‚umaczyć “paper” z angielskiego w tym kontekÅ›cie) napisany przez ludzi którzy wykazali siÄ™ wiedzÄ... i pracÄ... potrzebnÄ... by tÄ™ ciemnÄ... materiÄ™ pokazać (dla pewnych “wartoÅ›ci” sÅ‚owa “pokazać”). [...] [...] informacje “po ludzku” (aczkolwiek w jÄ™zyku angielskim) można znaleźć tutaj, natomiast dla chÄ™tnych (i majÄ…cych sporÄ… wiedzÄ™) jest dostÄ™pny oficjalny tekst (nie wiem jak przetÅ‚umaczyć “paper” z angielskiego w tym kontekÅ›cie) napisany przez ludzi którzy wykazali siÄ™ wiedzÄ… i pracÄ… potrzebnÄ… by tÄ™ ciemnÄ… materiÄ™ pokazać (dla pewnych “wartoÅ›ci” sÅ‚owa “pokazać”). [...]

]]> By: spaceman http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19630 spaceman Fri, 17 Nov 2006 22:46:53 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19630 This post has less to do with the specific observation being discussed and more to do with the issue of when, if at all, dark matter will be found. Ultimately, in my opinion, we will have to directly detect this stuff before we can be dead sure it is exists. Sean and friends, I have been wondering the following: 1). How soon is a WIMP detection predicted to take place? I have heard that a detection may occur during the 2007 CDMSII and Xenon10 runs, as these two experiments are moving into the "favored region" (x-section 10^-44 cm2) of the WIMP parameter space! 2). What will happen if the particles are not found even with the planned 1-ton direct detectors and not produced by the LHC? 3). Will a lack of a detection by 2020 be enough to get the cosmology community to move away from the dark matter particle hypothesis? 4). A lot of pundits say that it is a bad sign for the dark matter idea that the particles have not turned up yet. I am skeptical of these pundits; it took a lot of innovation and huge detectors to find the neutrinos. Does anyone know how long it was from when neutrinos were predicted to exist to when they were actually found? This post has less to do with the specific observation being discussed and more to do with the issue of when, if at all, dark matter will be found. Ultimately, in my opinion, we will have to directly detect this stuff before we can be dead sure it is exists. Sean and friends, I have been wondering the following:

1). How soon is a WIMP detection predicted to take place? I have heard that a detection may occur during the 2007 CDMSII and Xenon10 runs, as these two experiments are moving into the “favored region” (x-section 10^-44 cm2) of the WIMP parameter space!

2). What will happen if the particles are not found even with the planned 1-ton direct detectors and not produced by the LHC?

3). Will a lack of a detection by 2020 be enough to get the cosmology community to move away from the dark matter particle hypothesis?

4). A lot of pundits say that it is a bad sign for the dark matter idea that the particles have not turned up yet. I am skeptical of these pundits; it took a lot of innovation and huge detectors to find the neutrinos. Does anyone know how long it was from when neutrinos were predicted to exist to when they were actually found?

]]> By: sundogseven http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19544 sundogseven Thu, 16 Nov 2006 17:09:33 +0000 http://blogs.discovermagazine.com/cosmicvariance/2006/08/21/dark-matter-exists/#comment-19544 If the relative spins of entangled pairs can change instantaneously ie. travel faster than light speeed(or so some bloke down the local told me) then how do we know that the very edge of the universe which maybe did not coallesce and clump together for the supposed time scientists allow but sped apart after the supposed hyper inflation has pulled space-time apart at faster than light speeds and therefore the majority of the universe is and always be unobservable to us.If dark matter can overcome this gravitational connundrum could it not be that this could account for the missing mass? non-scientist. Perhaps the bloke down the pub had already had far too much Guiness If the relative spins of entangled pairs can change instantaneously ie. travel faster than light speeed(or so some bloke down the local told me) then how do we know that the very edge of the universe which maybe did not coallesce and clump together for the supposed time scientists allow but sped apart after the supposed hyper inflation has pulled space-time apart at faster than light speeds and therefore the majority of the universe is and always be unobservable to us.If dark matter can overcome this gravitational connundrum could it not be that this could account for the missing mass? non-scientist. Perhaps the bloke down the pub had already had far too much Guiness

]]>