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3181. http://www.mso.anu.edu.au/~geoff/HEA/FRW.pdf
Cosmological Space -Times Lecture notes compiled by Geoff Bicknell based primarily on: Sean Carroll: An Introduction to General Relativity plus additional material Thursday , 10 September 2009 1 Metric of special relativity ds 2 = -c dt + dx + dy + dz 2 2 2 2 2 = -dx 02 + dx + dy + dz 2 2 2 = ? dx dx ? where ? ?, = = Minkowski tensor = diag [-1, 1, 1, 1] 0, 1, 2, 3 This is the metric of four-dimensional flat ... The 3-sphere is expanding 3. ...
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Ссылки http://www.mso.anu.edu.au/~geoff/HEA/FRW.pdf -- 1606.0 Кб -- 10.09.2009
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3182. http://www.mso.anu.edu.au/~brian/A3002/probset1.pdf
... Problem 5. ... See figure 1 for the light curve of these narrow Nitrogen lines. ... Figure out the behaviour of each parcel of gas, and then add them all up to find the light curve. 5.4 (3pts) Using expression from problem 5.2, derive the expression for the time after SN explosion date, when the first light from the ionised ring reaches Earth. Using the expression from problem 5.2, derive the expression for the time after SN explosion date when the maximum brightness of the ring occurs. ...
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Ссылки http://www.mso.anu.edu.au/~brian/A3002/probset1.pdf -- 262.1 Кб -- 02.09.2009
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3183. http://www.mso.anu.edu.au/~brian/A3002/EssayAssignment.pdf
Essay ґ A3002 ґ Cosmology Final copy due September 15th. ... Your first task for Cosmology is to write an approximately 700 word Op-Ed piece on "Why I am studying Cosmology". ... Some Suggestions for Good Writing Write with a point of view. Figure out what you are writing about before you start writing. ... Write with structure: Good writing is not just the use of language. ... 70%-80%: A good essay which is deficient in one or more areas. 60%-70%: An essay which is deficient in several areas ...
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Ссылки http://www.mso.anu.edu.au/~brian/A3002/EssayAssignment.pdf -- 57.0 Кб -- 31.08.2009
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3184. http://www.mso.anu.edu.au/~geoff/HEA/Q5-8.pdf
High Energy Astrophysics Solutions to Exercises 5. (a) The beam is defined by x2 y2 B x y = exp ґ -------- + -------- 2 2 2 2 x y The FWHM contour is defined by: 1 x2 y2 B x y = -- -------- + -------- = ln 2 2 2 2 2 x 2 y The axes of this ellipse are therefore: x y = 8 ln 2 x 8 ln 2 y (b) The flux per beam is B F x y = I x y B x ґ x y ґ y dx dy Now, if I x y varies slowly within the extent of the ...
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Ссылки http://www.mso.anu.edu.au/~geoff/HEA/Q5-8.pdf -- 107.5 Кб -- 26.08.2009
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3185. http://www.mso.anu.edu.au/~geoff/HEA/HEA_Problems.pdf
High Energy Astrophysics Problem Set 1. (5 marks) Photon energies. ... 5. (15 marks) Flux densities and surface brightness in radio astronomy. The surface brightnesses of images in radio astronomy are always represented in terms of the units of "flux density per beam". ... 1987, ApJ, 316, 611) of the famous radio galaxy Cygnus A, shows contours of surface brightness in units of Jy/beam Estimate the surface brightness of the points labelled A and B in units of W m ґ2 Hz ґ 1 Sr ґ1 . ...
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Ссылки http://www.mso.anu.edu.au/~geoff/HEA/HEA_Problems.pdf -- 290.6 Кб -- 05.08.2009
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3186. http://www.mso.anu.edu.au/~geoff/HEA/Q1-4.pdf
High Energy Astrophysics Solutions to Questions 1-4 1. The relationship between energy and wavelength is hc 6.62 10 3.0 10 ґ6 = ----- = ---------------------------------------------------- = 1.24 10 --- m ґ 19 1.60 10 -- m Also, to determine frequency and wavelength given energy , use 1.60 10 14 = h = -- = -------------------------- ------ = 2.41 10 ------ Hz ґ 34 eV eV h 6.62 10 hc hc ґ6 = ----- = ----- = 1.24 10 ------ eV ґ1 4 m = 1.24 10 ------ eV ґ1 ґ 19 ґ 34 8 ґ1 eV Angstroms ...
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Ссылки http://www.mso.anu.edu.au/~geoff/HEA/Q1-4.pdf -- 117.5 Кб -- 04.08.2009
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3187. http://www.mso.anu.edu.au/pfrancis/phys1101/Lectures/L10/strategy_notes.pdf
... Teaching Problem Solving Describe the Physics choose one of the quantitative relationships which involves the target quantity Plan the Solution Ї Which quantitative relationship includes the target quantity? ... Page 29 Teaching Problem Solving Plan the Solution put in the numerical value and units for each quantity in your equation for the target quantity Execute the Plan Ї Which values (numbers with units) from the physics description should be put into the equation for the target quantity? ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/phys1101/Lectures/L10/strategy_notes.pdf -- 173.6 Кб -- 06.07.2009
[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/phys1101/Lectures/L10/strategy_notes.pdf -- 173.6 Кб -- 06.07.2009
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~pfrancis/phys1101/Lectures/L10/strategy_notes.pdf -- 173.6 Кб -- 06.07.2009
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3188. http://www.mso.anu.edu.au/pfrancis/phys1101/Lectures/L09/newplanets.py
from visual import * from time import clock from random import random from random import uniform # Stars interacting gravitationally # Program uses numpy arrays for high speed computations wid=900 heit=600 Nplanets = 100 # change this to have more or fewer stars G = 6.7e-11 # Universal gravitational constant # Typical values Msun = 2E30 Rsun = 2E9 Rtrail = 1e8 L = 4e10 vsun = 0.8*sqrt(G*Msun ...
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Ссылки http://www.mso.anu.edu.au/pfrancis/phys1101/Lectures/L09/newplanets.py -- 5.4 Кб -- 30.06.2009
[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/phys1101/Lectures/L09/newplanets.py -- 5.4 Кб -- 30.06.2009
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[ Сохраненная копия ] Ссылки http://www.mso.anu.edu.au/~pfrancis/phys1101/Lectures/L09/newplanets.py -- 5.4 Кб -- 30.06.2009
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3189. http://www.mso.anu.edu.au/~bessell/FTP/in1.lis
rw-r --r-- 1 bessell stromlo 70656 Apr 27 10:57 sp185_6ballsc.dst - rw-r --r-- 1 bessell stromlo 74752 May 19 16:00 sp243bsc.dst - rw-r --r-- 1 bessell stromlo 74752 May 20 09:15 sp274bsc.dst - rw-r --r-- 1 bessell stromlo 74752 May 19 16:20 sp285bsc.dst - rw-r --r-- 1 bessell stromlo 74752 May 19 16:21 sp286bsc.dst - rw-r --r-- 1 ...
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Ссылки http://www.mso.anu.edu.au/~bessell/FTP/in1.lis -- 2.6 Кб -- 24.05.2009
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3190. http://www.mso.anu.edu.au/~bessell/FTP/EtaCha_spectra/Lyo_paper.pdf
... t V r 4000 6000 8000 10000 65 43 21 0) ( ' G% ? ! ... Э 8000 ? ... 4 0.5 2.5 2.0 1.5 1.0 Г + F? H Еh r F UE H Г ? ... 1.0 1.5 2.0 PC Index 2.5 3.0 3.5 4.0 4.5 PC3 PC4 CaH2 PC5 0.5 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 1.5 2.0 (b) (a) 2.5 0.8 0.9 1.0 1.1 CaOH 0.5 0.5 1.0 (R-I) 1.5 2.0 2.5 1.2 1.0 0.8 0.6 0.4 0.2 1.0 (R-I) 1.5 (c) 2.5 0.3 0.4 0.5 0.6 0.7 P s ? ... 4 16 14 12 10 8 0.5 1.0 Siess et al. 2000) X=0.703, Y=0.277, Z=0.04 0.5 (R-I) 1.5 2.0 100 (a) 0.2 20 10 5 2 Baraffe et al. ...
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Ссылки http://www.mso.anu.edu.au/~bessell/FTP/EtaCha_spectra/Lyo_paper.pdf -- 671.8 Кб -- 01.05.2009
[ Текст ] Ссылки http://www.mso.anu.edu.au/~bessell/LLB2004.pdf -- 671.8 Кб -- 01.05.2009
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[ Текст ] Ссылки http://www.mso.anu.edu.au/~bessell/LLB2004.pdf -- 671.8 Кб -- 01.05.2009
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3191. http://www.mso.anu.edu.au/~charley/papers/CMBDipoleHistory.pdf
... 1996). ... We estimate the in uence of Galactic emission on the measurement by solving for the dipoles for a series of Galactic plane latitude cuts. The dipole amplitude and direction results from each channel and each Galactic cut are shown in Figure 1. ... Since the Galactic dipole vector is nearly orthogonal to the CMB dipole vector, it is almost maximally e ective in in uencing the CMB dipole direction and almost minimally e ective in in uencing the CMB dipole amplitude. ...
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Ссылки http://www.mso.anu.edu.au/~charley/papers/CMBDipoleHistory.pdf -- 233.5 Кб -- 26.04.2009
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3192. http://www.mso.anu.edu.au/~charley/papers/DaviesetalShadow.pdf
... DOI: 10.1089/ast.2008.0251 Hypothesis Article Signatures of a Shadow Biosphere Paul C.W. Davies,1 Steven A. Benner,2 Carol E. Cleland,3 Charles H. Lineweaver,4 Christopher P. McKay,5 and Felisa Wolfe-Simon6 Abstract Astrobiologists are aware that extraterrestrial life might differ from known life, and considerable thought has been given to possible signatures associated with weird forms of life on other planets. ... The invention of the microscope uncovered an unexpected microbial world. ...
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Ссылки http://www.mso.anu.edu.au/~charley/papers/DaviesetalShadow.pdf -- 206.0 Кб -- 18.04.2009
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3193. http://www.mso.anu.edu.au/~wood/lectures2009/astr3007_ass3.pdf
... This will be done by fitting period-luminosity relations in the form V = a в log P + b to Cepheid variables in these two galaxies. ... 8 Marks 2. ... 3R x3 2 Marks (b) Use this expression for the pressure to show that when 1 is constant, the adiabatic wave equation for the star can be written as x d d 3 R3 2 3 [(x - x4 ) ] + [ x - (31 - 4)] = 0. dx dx 1 GM 2 Marks (c) Show that near x = 0, the solution to this equation is of the form = Ax , where A is a constant and 2 = 3 (31 - 4). ...
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Ссылки http://www.mso.anu.edu.au/~wood/lectures2009/astr3007_ass3.pdf -- 49.4 Кб -- 31.03.2009
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3194. http://www.mso.anu.edu.au/~wood/lectures2009/Pulsation_1.pdf
ASTR 3007 - STELLAR PULSATION COMPONENT P e ter W o o d Research School of Astronomy & Astrophysics TOPICS COVERED Ї Main types of variable stars Ї Linear adiabatic pulsation theory => periods of pulsation Ї Linear non-adiabatic pulsation theory => stability - will a star pulsate? ... Here we see Cepheids and long-period variables (LPVs) (movies from Hartman: http://cfa-www.harvard.edu/%7Ejhartman/) WHY STUDY VARIABLE STARS? ... What could cause the pulsation period to vary from star to star? ...
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Ссылки http://www.mso.anu.edu.au/~wood/lectures2009/Pulsation_1.pdf -- 1998.4 Кб -- 26.03.2009
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3195. http://www.mso.anu.edu.au/~charley/papers/LineweaverEgan2008v2.pdf
Physics of Life Reviews 5 (2008) 225ґ242 www.elsevier.com/locate/plrev Review Life , gravity and the second law of thermodynamics Charles H. Lineweaver a, , Chas A. Egan a,b a Planetary Science Institute, Research School of Astronomy and Astrophysics Research School of Earth Sciences, Australian National University, Canberra, ACT Australia b Department of Astrophysics, School of Physics, University of ... Unclumped baryons in the early universe provided the initial low entropy of the universe. ...
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Ссылки http://www.mso.anu.edu.au/~charley/papers/LineweaverEgan2008v2.pdf -- 826.4 Кб -- 18.03.2009
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3196. http://www.mso.anu.edu.au/~charley/papers/RoblesEganLineweaverASSC2008.pdf
... This 11-parameter analysis quantifies the (a)typicality of the Sun: we obtain a reduced solar 2 /11 = 0.76 ? 0.09 and a probability of 29% ? 11% that a star selected at random has a lower 2 value than solar. ... We would like to know if these solar properties, taken as a group, are consistent with noise, i.e., is the pattern of the Sun in Figure 1 consistent with the values of a star selected at random from the stellar distributions? ... The median of this distribution is our adopted solar 2 value. ...
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Ссылки http://www.mso.anu.edu.au/~charley/papers/RoblesEganLineweaverASSC2008.pdf -- 2001.2 Кб -- 16.02.2009
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3197. http://www.mso.anu.edu.au/~charley/papers/LHBASSC2008.pdf
The Bombardment History of the Moon and the Origin of Life on Earth Charles H. Lineweaver Planetary Science Institute Research School of Earth Sciences and the Research School of Astronomy and Astrophysics Australian National University Canberra, Australia Email: charley@mso.anu.edu.au Marc Norman Planetary Science Institute Research School of Earth Sciences Australian National University Canberra, Australia and ... Any bombardment rate must pass beneath the asterisk labeled "3" in Fig. ...
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Ссылки http://www.mso.anu.edu.au/~charley/papers/LHBASSC2008.pdf -- 856.7 Кб -- 08.02.2009
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3198. http://www.mso.anu.edu.au/~bessell/FTP/Oldspectrophotometry/gregg_stds.coord
... 8.30 0.960 7.59 0.71 -1.8 "hd9051" 1 28 46.5 -24 20 25.4 ! 8.93 0.820 11.18 -1.6 "hd16031" 2 34 11.0 -12 23 03.5 ! ... 8.04 0.486 2.94 5.10 d -2.0 "HD26169" 04 00 52.5 -75 36 11.4 ! ... 7.46 1.088 9.46 -2.00 -1.7 "hd29574" 4 38 55.7 -13 20 48.1 ! 8.33 1.304 10.90 -2.57 -1.9 "hd36702" 5 31 52.2 -38 33 24.0 ! ... 8.00 0.703 5.67 2.33 d -1.5 "hd55496" 7 12 11.4 -22 59 00.6 ! ... 8.33 1.015 8.54 -0.21 -1.5 "ltt4364" 11 45 43 -64 50 24 ! 11.51 0.190 DC(C2) Hamuy "g13-35" 12 25 35.0 01 17 02.3 ! ...
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Ссылки http://www.mso.anu.edu.au/~bessell/FTP/Oldspectrophotometry/gregg_stds.coord -- 3.3 Кб -- 21.01.2009
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3199. http://www.mso.anu.edu.au/~bessell/FTP/Oldspectrophotometry/cuarti.arc
... Ti 1 840 57 * 3803.1724 | ... Ti 1 950 12 * 4013.8566 | ... Ti 1 1200 * 12 4033.8093 | ... Ti 1 840 in blend 4079.5738 | ... 200 Ar 1 * 4266.287 | 100 Ar 1 * 4272.169 | 150 Ar 1 * 4277.528 | ... 100 Ar 1 * 4300.56 | ... Ti 1 1200 43 bl * 4331.199 | 200 Ar 2 bl 4333.561 | 100 Ar 1 bl 4348.064 | ... 200 Ar 2 4375.9542 | ... 200 Ar 2 4426.001 | 400 Ar 2 4430.1890 | ... Ti 1 840 * 4453.315 | ... 200 Ar 2 * 4510.733 | ... Ti 1 1000 * 4522.3230 | ... Ti 1 250 4879.863 | ... 500 5565.49 | ...
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Ссылки http://www.mso.anu.edu.au/~bessell/FTP/Oldspectrophotometry/cuarti.arc -- 10.7 Кб -- 20.01.2009
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3200. http://www.mso.anu.edu.au/~bessell/FTP/bessell.cfile
GENERAL] alias dbs configure focal_station nasmyth_a; \ rotator vertical_angle; \ rotator 180 alias imager configure focal_station nasmyth_b; \ rotator position_angle alias echelle configure focal_station nasmyth_b;\ rotator not_in_use alias wopen configure windscreen_control open alias wtrack configure windscreen_control vertical_only alias t ...
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Ссылки http://www.mso.anu.edu.au/~bessell/FTP/bessell.cfile -- 3.6 Кб -- 10.01.2009
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