Ned Wright's Cosmology Academic

News of the UniverseFrequently Asked QuestionsEnter the academic or theItalian version  or theFrench version   Cosmological fads and fallaciesCMB SpectrumCMB AnisotropyBig Bang NucleosynthesisSupernova ObservationsCosmology, Religion & KansasSend me your comments

New on the educational: A discussion of the historyof the CMB dipole discovery.A history of COBE,the COsmic Background Explorer, in pix.A cool rollover page that blinksbetween a coloration picture comprised of 3 WMAP bandsand the WMAP ILC decreased galaxy mapA calculator that takes light journey timeand computes the redshift.There is also a complicated versionof my Cosmology Calculator.

Cosmology is the look at of the starting place, modern state, and future of ourUniverse.This area has been revolutionized with the aid of many discoveries madeduring the past century.My cosmology academic is an attempt tosummarize these discoveries.It might be "under creation" for theforeseeable destiny as new discoveries are made.I will try to keepthese pages up-to-date as a resource for the cosmology publications I teachat UCLA.The academic is absolutely non-business, buttax deductibledonations to UCLA are usually welcome.

Astronomy and cosmology are very tons mathematical sciences, however I haveattempted to avoid better math in these pages.I do use excessive schoolalgebra and geometry - guides required for admission to UCLA -however I have also includedsome animations[1, 2,3,4,5,6,7],some Java applets [1,2],and many illustrations in the tutorials,the ABC's of Distances,and the solutions to a number of theFrequently Asked Questions.

In addition to the cosmology academic,there's also a relativity tutorial andextensive discussions at the age,density andsize of the Universe.There is also a bibliography of books at arange of stages, and a Javascriptcalculator of themany distances concerned in cosmology.

Slides for current talks:Slidesfor the105th Faculty Research Lecture at UCLA, 28 Oct 2008.Colloquiumat the Geneva Observatory, 10 Nov 2006.Public talk on the 20 Oct2006 meeting of the Ventura County AstronomicalSociety27 Sep 2006 colloquiumat the Arizona State University School of Earth and Space Exploration.24 Sep 2006 Talk at theMt. Wilson Observatory AssociationInvited talkatEinstein's Legacy: Relativistic Astrophysics and Cosmology,7-eleven Nov 2005.Presentationat theInternational Symposium on Particle Physics, Astrophysics and CosmologyLectures at the International Summer Institute on Particle physics,Astrophysics and Cosmology, Hangzhou China, 2005 August15,16,18."Fact and Fiction inCosmology", a public lecture on the Cal State Northridge planetarium.thirteen March 2005 AFHU EinsteinSymposium Talkthree March 2005 Director'sDistinguished Lecture at LLNL27 May 2004 Ohio StateColloquium11 Oct 2003 UCLA Extension CourseSeptember, 2003 NATO ASI in Cargese lectures(1,2,3)lectures at theJuly, 2003 winter schoolin Argentina"Are We Likely to Be Alone" at the4 April 2003 CSEOL SymposiumAstrophysics Fact Sheet

The course notes(131 pages, 403 equations, fifty one figures)for the higher department undergraduate Stellar Systems and Cosmology route,Astronomy a hundred and forty, that I remaining taught in spring 2008 are to be had at the Web.And for a miles more technical discussion of cosmologysee my graduate course Astro 275lecture notes (141 pages, 441 equations, forty eight figures).This course become ultimate taught inside the spring of 2015.News of the UniverseA New Quasar Record Redshift z = 7.654

12 Jan 2021 - Wang et al.document a luminous excessive redshiftquasar,J0313-1806, observed by using comparingPan-STARRS statistics with infrared surveys from UKIRT and WISE.The Lyman-α area is at 1.06 μin the infrared.A Spectroscopic Redshift of z = 10.987

14 Dec 2020 - The galaxy GN-z11, previously mentioned as having aredshift of 11.1 ± 0.1 based onthe Lyαbreak determined with HST,is shown to have redshiftedlines the usage of the MOSFIRE instrument on the Keck telescope, givinga redshift of 10.987.The located lines blanketed the doubly ionized carbon doublet at 191 nmwhich was redshifted to two.28 μm.The HST has a heated mirror which reduces its sensitivity forsuch lengthy wavelengths.HolyCow! H0LiCOW gets Hubble Constant to 2.four percent

eleven Jul 2019 -Wonget al. combinestime delay information from 6 quasars to getH0 = seventy three.three ± 1.75km/sec/Mpc, in settlement with the SH0ESCepheid-based totally distance ladder measurement(seventy four.03 ± 1.forty two) and disagreeingwith the state-of-the-art CMB version primarily based value,H0 = 67.80 ± zero.9 km/sec/Mpc.On the other handFreedmanet al. get a distance ladder price ofH0 = sixty nine.8 ± 0.eight (stat) ± 1.7 (syst)km/sec/Mpc the use of the top of the purple massive branch to calibrateType Ia supernovae.Another Quasar Time Delay Hubble Constant

06 Sep 2018 -Birrer et al. record thetime delay distance to the doubleimaged quasar SDSS 1206+4332 which additionally has an Einstein ring picture ofits host galaxy.They report Ho 68.8 ± 5.25km/sec/Mpc for this item, and a weighted suggest of the 4 objectsstudied with the aid of the H0LiCOW collaboration of 72.five ± 2.2 km/sec/Mpc.Claimed Signal from Cosmic Dawn

01 Mar 2018 -Bowman et al. (2018, Nature, 555, 67-70)[$]claim the detection of an absorption dip focused at 78 MHzwith a width of 19 MHz and a intensity of 0.5 K because of 21 cm absorptionby impartial hydrogen atredshifts from 15 to 20.This is much deeper than predicted for wellknown physics soFialkov et al.[arxiv:1802.10577] have proposed dark be counted scattering from baryonswhich has caused plenty of press interest.But the foreground becoming procedure is pretty correlated with the equipped signalso the satan is in these details.The foreground at seventy eight MHz is 3000 timeshigher than the claimed sign.New Quasar Record Redshift

06 Dec 2017 -Banados et alin Nature describe a newquasarat z=7.54.This changed into discovered the use of IR surveydata as an IR source that was very faint optically because of absorptionby neutral hydrogen at 122 nm,redshifted to a wavelength of about 1036 nm.Its designation inside the AllWISE catalog is WISEA J134208.05+092837.8.WMAP wins the Breakthrough Prize in Fundamental Physics

03 Dec 2017 - The WMAPscience group gained the2018 Breakthrough Prize in Fundamental Physics.Chuck, David, Gary, Lyman and Normlooked proper in tuxes.News from theDark Energy Survey

04 Aug 2017 - The first cosmological results of theDES have beenreleased.Thebasic effects paper offers limits on parameters forΛCDMand wCDM fashions with variable equationof nation, w.The headline consequences combine thelensing and galaxy clusteringdata from the DES with CMB statistics from Planck,BAO information,, andsupernova records.The combined data giveΩm = zero.299(8), Ωb = zero.0479(14),Ho = sixty eight.3 ± 1 km/sec/Mpc, and w = -1.00 ± zero.05.This is regular with ΛCDM.The ratio of CDM to baryonsis 5.24 ± 0.21.A flat Universe is believed.Non-information about the accelerating Universe

21 Oct 2016 -Nielsen, Guffanti & Sarkar have claimed that an progressed treatmentof information ends in a reduction of the statistical significance ofthe supernova proof for an accelerating Universe, from 4 sigmausing the usual evaluation to three sigma in their new analysis.In theirFigure 2, the non-accelerating Universe line touches the 3 sigma contour.In the standard evaluation a comparable Figure (third determine on mySupernova Cosmology web page) suggests the4 sigma contour hitting the non-accelerating Universe line.This isnot a large deal anyhow, however extra importantly the new statisticalanalysis is wrong.It assumes that the intrinsic luminosities of thesupernovae within the discovered pattern aren't correlated with theirredshifts, and this assumption is easily proven to be false.The highredshift part of the JLA sample is on common brighter than the lowredshift component, due to the fact distant low luminosity items are more difficult to find,an effect long recognized to astronomers as theMalmquist bias.Hubble Constant from Lensing Time Delay

07 Jul 2016 - The H0LiCOW project hasannounced a new dedication of theHubble constantfrom the time delaysseen in strongly lensed quasars.Theyfind H0 = seventy one.nine+2.4-3.zero km/sec/Mpc primarily based on three structures.FRB redshift determined

25 Feb 2016 - Keane etal.recognized the host galaxy of a Fast Radio Burst, and obtained a redshift of0.492 ± 0.008.This plus the dispersion degree offers a densityfor the intergalactic medium of Ω = zero.049 ± 0.013, regular withΛCDM expectation of 0.041.Short GRB from GWB?

15 Feb 2016 -Connaughton et al. file a 1 2d burst ofgamma-rays occuring zero.4 seconds after the gravitational waveburst GWB 091416.This burst of radiation had one millionthas plenty power as the gravitational wave burst.The fake alarm probablity is 0.22 percent.LIGO Detects Black HoleMerger 1.three Billion Lightyears Away