Path: csiph.com!au2pb.net!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!peer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!Xl.tags.giganews.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Sun, 06 Dec 2015 16:48:46 -0600 Message-ID: <5664BB4C.6368@ix.netcom.com> Date: Sun, 06 Dec 2015 14:48:44 -0800 From: The Starmaker Reply-To: starmaker@ix.netcom.com X-Mailer: Mozilla 3.04Gold (WinNT; U) MIME-Version: 1.0 Newsgroups: sci.physics Subject: Re: What is the universe made of? Shedding light on the mystery of missing ordinary matter References: <8PydndgvLqHdMMLLnZ2dnUU7-IkAAAAA@giganews.com> <207c95be-d2aa-4938-8fd6-48cae9bf7755@googlegroups.com> <6653f6e7-3f2a-4109-beb7-2ba06ada1c34@googlegroups.com> <0f9b2775-aacf-4519-8394-dbf79d3ef051@googlegroups.com> <9bc6a3d6-f9f4-4859-b5a6-e4f20a600b07@googlegroups.com> <6c9160ca-c377-4b8f-8c39-350309e44c5b@googlegroups.com> Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Lines: 121 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 162.239.141.5 X-Trace: sv3-U31Yavu6poBV3mjzTumma40UfjDs/epfzn8FP+c+7+KIP5b16Ngz6UfgNBEagWSdaylZrYgejvDNxNJ!SCqVnkBmcF08W+Pt+or9m7BUdrl9pNknmYdjpyU8KAZgcbvELLmU8EXd1wc2C8N0oDm0LpqDiNTi!FU9x4dL7oA== X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 X-Original-Bytes: 6460 X-Received-Bytes: 6572 X-Received-Body-CRC: 964657338 Xref: csiph.com sci.physics:537721 Ross A. Finlayson wrote: > > On Saturday, December 5, 2015 at 5:24:21 PM UTC-8, Ross A. Finlayson wrote: > > On Thursday, December 3, 2015 at 6:45:59 PM UTC-8, Ross A. Finlayson wrote: > > > On Thursday, December 3, 2015 at 6:44:01 PM UTC-8, Sam Wormley wrote: > > > > On 12/3/15 8:19 PM, Ross A. Finlayson wrote: > > > > > This > > > > > is in part the measurement effect, similarly the deeper > > > > > we look into the well the more the blinders there are, > > > > > that then see yet more space and mass and then about > > > > > how current models using "WMAP is flat" are off by > > > > > 10^120 orders of magnitude (all the way off). > > > > > > > > > > > > You are not making any sense at all, Ross. > > > > > > > > > > "Making cents" is for bean-counters, > > > not conscientious physicists (who > > > can be the same thing). > > > > > > About Alma: those clusters are more than 11 billion > > light years away, thus that view is 11 billion years old. > > > > http://phys.org/news/2015-12-alma-monstrous-baby-galaxies-cradled.html > > > > "The shape of the cluster observed by the Subaru > > Telescope indicates the presence of a huge 3D web > > of invisible dark matter." > > > > "This finding supports the model that monstrous galaxies > > form in areas where dark matter is concentrated. And since > > modern large elliptical galaxies are simply monstrous galaxies > > which have mellowed with age, they too must have originated > > at nexuses in the large scale structure." > > > > > > So, it seems the "dark matter" presence was computed off > > the visible segment, then there's a difference with the radio > > segment. > > > > > > > > Why galaxy arms instead of galaxy rings? > > > > > > http://arxiv.org/abs/1510.08861 > > > > "ALMA Deep Field in SSA22: A concentration of > > dusty starbursts in a z=3.09 protocluster core" > > > > From the abstract, about the "nexus" is about "at the > > junction of the 50 Mpc-scale filamentary three-dimensional > > structure traced by Lyman-alpha emitters (LAEs) in this field ...." > > > > > > ("We find that four of the eight SMGs host > > a X-ray luminous active galactic nuclei (AGN). " > > I think that's interesting because it's half of them.) > > > > "The density distribution of dark matter is expected > > to reflect that of baryonic matter and consequently > > that of galaxies (e.g., Kauffmann et al. 1999)." > > > > > > "Throughout this letter, we adopt a cosmology with > > Ωm = 0.3,ΩΛ = 0.7, and H0=70 km s−1 Mpc−1." > > > > Kauffmann, Colberg, Diaferio, and White: 1999 MNRAS? > > > > arxiv.org/pdf/astro-ph/9906493 > > > > "In figures 15-17 we show fits to the data obtained > > for the popular ΛCDM cosmology (Ω = 0.3, Λ = 0.7, > > H0 = 70 km s−1 and σ8 = 1). We note that quasar > > luminosity functions in the literature are almost > > always computed assuming a cosmology with q0 = 0.5 > > and H0 = 50 km s−1. In order to avoid having to re-analyze > > the real observational data, we choose to transform our > > model predictions to the values that would be obtained > > if the observations were analyzed assuming an Einstein- > > de Sitter universe with Hubble Constant h = 0.5. Because > > structure forms earlier in the ΛCDM cosmology, galaxy-galaxy > > merging rates are substantially lower at z = 0 than in the high- > > density CDM cosmology. As a result, we do not require an very > > strong evolution in the cold gas content of galaxies to reproduce > > the strong decline in quasar space densities from z ∼ 2 to the > > present day. Our best-fit model has α ∝ (1 + z)−1 and tacc(z = 0) > > = 2.5×107 Gyr. In addition we assume that tacc scales in the same > > way as the host galaxy dynamical time in a ΛCDM cosmology: tacc > > ∝ (0.7+0.3(1+z)3)−1/2 (Mo, Mao & White 1998). As seen in figures > > 15-17, the ΛCDM model can simultaneosly fit the evolution of cold > > gas inferred from the damped systems and the decline in quasar > > space density from z = 2 to the present day." > > > > Oh, so you just adjust the parameters to fit the model, how neat. > > More on "why galaxy arms instead of rings", > just some Wiki-fodder, basically that spiral > is the way of galaxies, then as of why. > > https://en.wikipedia.org/wiki/Spiral_galaxy > https://en.wikipedia.org/wiki/Hubble_sequence > > There's a lot to be understood in this about > the fractal (self-similar at any scales), about > why barred spiral galaxies are like digital ones > and pinwheel spiral galaxies are like analog ones. > > This isn't so much about explaining the missing > ordinary matter so much, as yet: how are spiral > galaxies formed, and, of the various sorts why, > then, is it usual for all galaxies to be spiral > galaxies, then, why variously barred and pinwheel > spiral galaxies. Pinwheel spiral galaxies purpose is to propell more stars.