Cosmolgy Definition and 135 Threads
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I How can there be fluctuations in the inflaton field value?
http://www.counterbalance.org/cq-turok/etern-body.html https://ned.ipac.caltech.edu/level5/Kolb/Kolb3_1.html) http://www.astronomy.ohio-state.edu/~dhw/A873/notes7.pdf) According to QFT, if you make repeated measurements of some property of the field then you will in general measure a... -
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Physics Starting my PhD in cosmology -- question about my career prospects
Hello all,Next year, January I will start my PhD in Cosmology. Salary is fair and I don't have to pay the tuition fee. I always loved the idea of doing a thesis about Cosmology. My master's degree was about computational physics where I had to learn how to program in C/C++, Fortran, Matlab...- arierreF
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I would like advice on which sub-areas I should follow for two Masters
Hi folks, My name is José Ricardo, I study at the Federal University of Rio de Janeiro (1st period). As the majority of the academics, always there is one who wants to follow a career. I'm doing major in Physics. I want to teach? Yes, I do. But I want to follow the research as well. I have...- José Ricardo
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 1: Introduction
Copyright reserved to Prof. Bharadwaj and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105046/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105046- Wrichik Basu
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 2: Kepler's Law
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 3: The Solar System
Copyright reserved to Prof. Bharadwaj and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105046/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105046- Wrichik Basu
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 4: The Solar System (Contd.)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 5: Binary Systems
Copyright reserved to Prof. Bharadwaj and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105046/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105046- Wrichik Basu
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 6: Binary Systems (Contd.)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 7: Tidal Forces and the Earth Moon System
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 8: Fluid Mechanics
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 9: Hydrostatics and the Solar Wind
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 10: Radiative Transfer
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 11: Radiative Transfer (Contd.)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 12: Thermal Radiation
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 13: Thermal Radiation and the Sun
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 14: Virial Theorem and Its Application to Stars
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 15: Stars: Magnitudes and the H-R Diagram
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 16: Stellar Physics - I
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 17: Stellar Physics - II
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 18: Stellar Physics - III
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 19: Stellar Physics - IV
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 20: Stellar Physics - V
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 21: White Dwarfs
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 22: White Dwarfs and Neutron Stars
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 23: Galaxies
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 24: Galaxies and the Expanding Universe
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 25: The Expanding Universe
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 26: Dynamics of the Expanding Universe
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 27: Dynamics of the Expanding Universe (Contd.)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 28: The Expanding Universe and the Cosmological Metric
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 29: The Cosmological Space - Time
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 30: Distances
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 31: Distances (Contd.)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 32: Distances and the Hubble Parameter
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 33: Distances, the Hubble Parameter and Dark Energy (Contd.)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 34: Distances and the Hubble Parameter
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 35: CMBR and Thermal History
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 36: CMBR and Thermal History (Contd...1)
Copyright reserved to Prof. Bharadwaj and NPTEL, Govt. of India. Lectures: http://www.nptel.ac.in/courses/115105046/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=115105046- Wrichik Basu
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 37: CMBR and Thermal History (Contd...2)
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 38: Thermal History, Expansion Rate and Neutrino Mass
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 39: Thermal History: Neutrino Mass, Nucleosynthesis
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Astrophysics & Cosmology by Prof. S. Bharadwaj (NPTEL):- Lecture 40: Big Bang Nucleosynthesis
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How Can PF Enhance Learning in Plasma Physics and Cosmology?
I study engineering physics and I’m interested in plasma physics and cosmology- Pouya Pourkarim
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B What fraction of the matter in the universe is in black holes?
Conceptually, at least, this is a simple question, although I recognize that it might be hard to calculate in practice from available data. The matter-energy budget of the universe is measured (in a model dependent way) to consist of a certain percentage of dark energy, a certain percentage of... -
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I How to derive number of nucleons in Universe?
I understand that there are roughly ##N=10^{79}## nucleons in the visible Universe. This number comes from adding up the nucleons of ##100## billion stars in ##100## billion galaxies in the visible Universe i.e. $$N=\frac{10^{30}}{10^{-27}}. 10^{11}.10^{11}=10^{79}$$ where mass of sun is... -
I Is suppressed gravitational pull a possible explanation for dark energy?
One way to get the universe to expand is with dark energy that pulls at the matter of the galaxy separating it or equivalently for space-time to not be perfectly flat. An alternative, in principle, would be for the gravitational pull between objects like galaxies and galactic clusters to be...- ohwilleke
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- Forum: Beyond the Standard Models
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I IOAA 2nd problems: universe expansion
Could anyone please guide me how to do these problems?- Petch Phumrapee
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B How to do the calculations showing the Universe is flat?
I've been trying to understand how we know that the observable universe is flat, and I'm having difficulty finding any sources that explain exactly how the calculations were done. On this WMAP website (https://map.gsfc.nasa.gov/mission/sgoals_parameters_geom.html), it says: "A central feature of... -
I
B Can this be another reason for dark energy?
Suppose the initial force and energy bursting out during big bang was very huge . The matter just after big bang would have been very close , so the gravitational attraction would have been very high , which would have caused the acceleration produced by big bang to decrease . As time increased...- Inderjeet Singh
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- Forum: Astronomy and Astrophysics