Cosmology Definition and 951 Threads

I going to to study the quantum cosmology. who can give me some advice and supply some papers and books? Thanks.

Hellfire requested that I post a list of classic papers that one could use for reference when trying to understand the current state of astronomy and cosmology. I'll do so here, but if I could politely ask the following: - Please do not debate the veracity of the papers in this thread. In...

I have always read about simulations being done by computer softwares concerning cosmology and astrophysics, do you know if any of the simulations softwares are offered (hopefully, free :approve: ) on the web? thanks in advance. p.s do these softwares work on assembly environment...

After an abortive start in the new IR Forum I am beginning a new thread on the published theory of Self Creation Cosmology. There has already been many posts on the subject in PF and I apologise for any repetition, but having been asked to post it here in A&C I here make a clean start! The...

I do not subscribe to all of his ideas, nor Arp's, but I wholeheartedly encourage the epistemology that is sorely lacking in today's physics. We had to wait a LONG time before Einstein's model of gravitation overtook Newton's (and still NASA can do a pretty nice job using Newtonian...

Hi, everybody, I am planning to write an article titled "cosmology: the scinece on the universe". So far I have written about 40 pages. I want to share/check my ideas with you. Abstract of the article looks as follows: Every object in the universe, living or non living, changes with time...

What are the hot topics in astronomy and cosmology as measured by production of recent academic papers? I'm not looking for an exact number, just a relative ranking with some sense of order of magnitude. My motive is to get at the whole mainstream v. non-mainstream issue in a way that...

With all the crazy ideas that get thrown around in this forum, I thought it would be good to step back and review the mainstream view on cosmology in 2005. The field is advancing very rapidly, so it's possible that even the most reliable websites will be woefully out of date, both in terms of...

Ned Wright lecture at KITP: http://online.itp.ucsb.edu/online/colloq/wright1/

I'm on the verge of ripping my hair out :mad: I understand the basics of tensors but I just can't get my head around the need have having contra and covariant vectors.. what is the point??! A vector is a vector right? why have a sub and superscripts why can't they just stick to one or the...

I thought this was pretty interesting: http://arxiv.org/abs/astro-ph/0504006 Title: Virtual Observatory: From Concept to Implementation Authors: S.G. Djorgovski, R. Williams Is this the beginning of an era of armchair cosmology?

HA! To believe that the universe was created and "runs" via some infinite intellegence if you would prefer to call it need not be just dismissed by saying it can not be discussed here because it is "religious!". FACTS are FACTS, for every x questions the so-called scientists answer with some...

Being lazy by nature, I am always on the lookout for new papers that dip far enough below the technosphere to be comprehended by mere mortals - without descending to the tabloid level. This recent entry makes my 'must read' list: http://arxiv.org/abs/gr-qc/0503107 Understanding Our Universe...

A worldclass cosmologist, Thanu Padmanabhhan, has come out with one of these surveys of cosmology for general audience, that a senior cosmologist may do every now and then. It is going to be a 30 page chapter in Abhay Ashtekar's Einstein Centennial book "A Hundred Years of Relativity"...

Hello Marcus, selfAdjoint, nightcleaner, Chronos, setAI and others I think the following speaks for itself Viable exact model universe without dark energy from primordial inflation David L. Wiltshire http://www.arxiv.org/abs/gr-qc/0503099 Regards Kea :wink:

http://www.sciam.com/article.cfm?chanID=sa006&colID=1&articleID=0009F0CA-C523-1213-852383414B7F0147 we've referenced the clear and useful journal articles of Charles Lineweaver and Tamara Davis a lot at PF over the past couple of years Glad to see that they now have a feature article in...

The cosmology is in crisis. You may see this 1st Crisis In Cosmology Conference (CCC-I): Challenging Observations and the Quest for a New Picture of the Universe http://www.cosmology.info What do you think?

Is cosmology a sales pitch or science? i am baffled by the conflicting observations, you all know, without explanation what i mean, yes or no, is good in between not so good. an honest appraisal would be welcome

What is the difference?

There will be a conference entitled 1st Crisis In Cosmology Conference (CCC-I) Any takers? Garth

Recently, several groups have endeavored to experimentally map the large-scale structure of the Universe with the Sloan Survey being the most ambitious. At the same time, we've been able to map the cosmic microwave background to 10^-6 degrees. I believe these two maps agree but I'm confused...

Regular readers to GA&C here in PF will know only too well that some of our prolific posters feel the mainstream work is rather too heavily model-laden for their taste ... and others that this characterisation quite unfair. Wrt those who are comfortable with the redshifts of galaxies (and SN)...

In a post below relating to Hawking radiation, Chronos linked to a page that expressed the existence of virtual pairs as a product of energy and time limited by the Heisenbug uncertainty principle: \Delta E\Delta t\geq\frac{\hbar}{2} This simplified view neatly illustrates one of the...

Greetings everyone I recently attended a lecture discussing brane gas cosmology, where it was mentioned that a recent calculation showed 3-dimensional branes were the most likely type of brane to form. Can someone please refer me to the paper which includes this calculation? Also, is...

Sean Carroll has posted a Cosmology Primer explaining contemporary cosmology for general audience It could be very handy for us to have at PF to refer to. Here, for example, is the FAQ http://pancake.uchicago.edu/~carroll/cfcp/primer/faq.html for other sections, go to the TOC and click on...

"Review of Cosmic Vision 2015-2025" begins: "The Cosmic Vision workshop at UNESCO on 15-16 September 2004 showed that Europe is richer than ever in ideas for what should be done in space science in the coming years. This workshop brought us a major step forward in developing the vision of the...

This should stir up some lively discussion. http://arxiv.org/abs/astro-ph/0405630 CAUTION: Not suitable for audiences who habitually memorize all the tables in the back of the textbook.

http://arxiv.org/abs/gr-qc/0408074 Bill Unruh has been doing some LQC research Looking at the positive curvature case Bojowald and friends mostly looked at the spatially flat case Unruh found some interesting difficulties with the positive curved universe, especially the kind that...

A very interesting interview with Paul Dirac on his large numbers hypothesis which relates to cosmology http://www.fdavidpeat.com/interviews/dirac.htm

Hi. I just wanted you to tell me does exactly cosmology means? and about the works done in it. thanks in advanced. somy :smile:

Dear forum members, may I post on this Forum my questions about GR and a brief description and link to my work in which they are answered? Questions of General Relativity (Also posted on the Special and General Relativity Forum) 1. In the presence of gravitational fields the...

this just out: http://arxiv.org/gr-qc/0406042 Oscillatory Universes in Loop Quantum Cosmology and Initial Conditions for Inflation James E. Lidsey, David J. Mulryne, N. J. Nunes, Reza Tavakol 6 pages, 4 figures LQC continues attracting new researchers: these people are newcomers...

here is an alternative cosmology site I found on the net the theories outlined here should keep you busy for a while since the site is copyright protected I will only post the link and not the actual text from the site Reinventing the Universe take the time to read each theory...

I personally don't follow braneworld cosmology, but there could be a thread about. It interests enough people here to have a discussion IMO A possible thread-starter is a recent post by sol2 which has some beautiful images, or links thereto, tho not necessarily directly connected to...

I am searching for a complete and extensive reference (or a reference set) about cosmology. It should be up to date and, if possible, with not too much formulas without proofs. It seams there are two classical books: Principles of Physical Cosmology, Peebles. Cosmological Physics, Peacock...

Newton was separate from his clockwork universe; in the last century we have realized that we experimenters really subjectify the outcome of our experiment by attempting to exclude ourselves from it. Both quantum mechanics and cosmology involve an observer who participates by disturbing an...

Hi all, I'm looking for a good review on how string theory accounts for inflation. I found a great review on 'classical' inflation by Linde explaining the paradigms in terms of GR and scalar fields but am looking for a good introductory review in terms of the string paradigm. I'm hoping to...

so the farther we look the more redshift we see in distant galaxies, but the farther we look the farther in time we look as well. so in other words, the farther back in time we go the faster galaxies appear to be moving away from us - the closer in time the slower...wouldnt' that implicate a...

http://arxiv.org/abs/astro-ph/0401136 The theory of Self Creation Cosmology is described and found to be as concordant as the standard cosmological 'concordance model' with local experiments and cosmological observations. However it does not require the speculative hypotheses of inflation...

I want to pursue for a Ph.D in these area.

Does anyone know if VSL theories are being seriously researched, studied, and pursued? -Glenn

Some new names (new to me anyway) Shinji Tsujikawa (has published with Robert Brandenberger, background in string research now interested in loop gravity) Roy Maartens (also string background, has published with Ellis) Parampreet Singh (one of the new LQG people in India) "Loop quantum...

How do we know that the physics we can do in labs here on Earth today is the same physics in galaxies a long time ago and far, far away? Take a collection of your favourite theories - the gravity of Newton, the electromagnetism of Maxwell, the quantum world of Schrödinger and Heisenberg...

In this theory a theoretical model is constructed for observation. (This is the first of a series) A: Space devoid of matter. B: Matter devoid of space. C: Space and Matter. In reply to "A" Is absolute space possible, a void with non-existing matter? has it been proven? can it...

An astronomy prof who teaches at a University in Iowa maintains a resource page of online astro java applets for students and general public to use and one of the applets is "cosmology calculator" http://www.earth.uni.edu/~morgan/ajjar/Cosmology/cosmos.html Here is her homepage...

Lineweaver(May 2003)--web's best cosmology tutorial http://nedwww.ipac.caltech.edu/level5/March03/Lineweaver/Lineweaver_contents.html I've been using Ned Wright's (UCLA astronomy dept) cosmology tutorial and FAQ a lot, but this new one is even better for some things---more up to date...

What I suspect is a major paper by Ashtekar (and others) appeared in arXiv this month----on June 9. Mathematical structure of loop quantum cosmology Ashtekar, Bojowald, Lewandowski arXiv:gr-qc/0304074 http://www.arxiv.org/abs/gr-qc/0304074 Here is the concluding paragraph: "We...

http://www.arxiv.org/abs/astro-ph/0202008 Here is a good overview of cosmology describing the evidence for the present model, the open questions, and what ongoing observations can be expected to resolve over the next decade. The writing is rigorous and for fellow profesionals (no effort at...

I would be thankful to you, if you tell me which book do you consider to be best, on the subject of cosmology, for: 1. Begineers 2. Intermediates 3. Advanced Thanks in advanced.

http://xxx.lanl.gov/abs/hep-th/9910146 This is only 16 pages and in PDF so easy to print out. It is by Fotini Markopoulou and Lee Smolin and it is called "Holography in a quantum spacetime" I nominate it for the landmark eureka paper of 1999. String theory and branes are on the run...