Coursework 7 File
... Boltzmann’s constant k = 1.38 × 10−23 J K−1 Planck’s constant h = 6.63 × 10−34 m2 kg s−1 Mass of hydrogen molecule mH2 = 3.34 × 10−27 kg Gravitational constant G = 6.67 × 10−11 N kg−2 m2 Solar mass Msun = 2 × 1030 kg Solar luminosity Lsun = 3.8 × 1026 W Solar radius Rsun = 7 × 108 m Jupiter radius R ...
... Boltzmann’s constant k = 1.38 × 10−23 J K−1 Planck’s constant h = 6.63 × 10−34 m2 kg s−1 Mass of hydrogen molecule mH2 = 3.34 × 10−27 kg Gravitational constant G = 6.67 × 10−11 N kg−2 m2 Solar mass Msun = 2 × 1030 kg Solar luminosity Lsun = 3.8 × 1026 W Solar radius Rsun = 7 × 108 m Jupiter radius R ...
Homework 5 – AS.171.627 – Zakamska
... 3. Stellar wind (3 points). A massive star produces a spherically symmetric outflow of ionized gas observed via optically thin emission lines. The velocity of the outflow is v0 and the surface brightness of the emission is ∝ R−α at R > R0 , with α > 2. What is the observed line-ofsight velocity disp ...
... 3. Stellar wind (3 points). A massive star produces a spherically symmetric outflow of ionized gas observed via optically thin emission lines. The velocity of the outflow is v0 and the surface brightness of the emission is ∝ R−α at R > R0 , with α > 2. What is the observed line-ofsight velocity disp ...
BML_V
... and may then subsequently undergo a phase transition to molecular hydrogen, before being incorporated into stars. So HI studies are necessary, both to understanding the primary processes of galaxy formation and assembly, and to understanding the precursor ...
... and may then subsequently undergo a phase transition to molecular hydrogen, before being incorporated into stars. So HI studies are necessary, both to understanding the primary processes of galaxy formation and assembly, and to understanding the precursor ...
Observational Overview
... DISK – thin compared to the diameter, thickness = 0.3 kpc and diameter = 25 kpc. Contains all raw material for making stars (huge clouds of molecular hydrogen and dust (tiny particles made of carbon and silicate)) and all the young stars, including Sun which is 8 kpc from centre. BULGE – contains o ...
... DISK – thin compared to the diameter, thickness = 0.3 kpc and diameter = 25 kpc. Contains all raw material for making stars (huge clouds of molecular hydrogen and dust (tiny particles made of carbon and silicate)) and all the young stars, including Sun which is 8 kpc from centre. BULGE – contains o ...
Galaxies
... • The motion of stars near the galactic center gives the mass of the galactic nucleus. • Infrared images of the stars show the motion. • The mass is 2.6 million (106) M. ...
... • The motion of stars near the galactic center gives the mass of the galactic nucleus. • Infrared images of the stars show the motion. • The mass is 2.6 million (106) M. ...
First generation stars
... • 1) n_h~10^4 cc where LTE level population are achieved. Fragmentation mass scale ~100 solar masses. • 2) n_h>10^12 cc where gas become optical to H2 lines. Fragmentation mass scale <= 1-2 solar masses. ...
... • 1) n_h~10^4 cc where LTE level population are achieved. Fragmentation mass scale ~100 solar masses. • 2) n_h>10^12 cc where gas become optical to H2 lines. Fragmentation mass scale <= 1-2 solar masses. ...
Quantum Mechanics I. Introduction Just before 1900, the classical
... C. Classical theory, modeling the atoms as harmonic oscillators, resulted in the “ultraviolet catastrophe”. Max Planck, in order to reproduce the experimental results, had to assume that each oscillator could only have an integral number of units of energy, rather than have any arbitrary amount. In ...
... C. Classical theory, modeling the atoms as harmonic oscillators, resulted in the “ultraviolet catastrophe”. Max Planck, in order to reproduce the experimental results, had to assume that each oscillator could only have an integral number of units of energy, rather than have any arbitrary amount. In ...
tutorial 6
... between the time t3 when the beginning of the pulse reaches the telescope and the time t4 when the end of the purse reaches the telescope. Fill in thetable above (youranswers should be in terms of T, v, Y,0, D, and c). Now determine the observed period by using Te55 t4 _ t3 ...
... between the time t3 when the beginning of the pulse reaches the telescope and the time t4 when the end of the purse reaches the telescope. Fill in thetable above (youranswers should be in terms of T, v, Y,0, D, and c). Now determine the observed period by using Te55 t4 _ t3 ...
NAME
... ____ 20. What type of standard candle is used to determine distances to globular clusters? a. O-type main-sequence stars b. Cepheid variable stars c. T Tauri stars d. Type I supernovae e. RR Lyrae stars ____ 21. By comparing globular clusters, you find that Cluster A’s RR Lyrae stars are 100 times f ...
... ____ 20. What type of standard candle is used to determine distances to globular clusters? a. O-type main-sequence stars b. Cepheid variable stars c. T Tauri stars d. Type I supernovae e. RR Lyrae stars ____ 21. By comparing globular clusters, you find that Cluster A’s RR Lyrae stars are 100 times f ...
Chapter 10
... nucleus of our Galaxy, and what is the probable explanation? 7. Describe the factors involved in galactic formation, including the role of collisions between galaxies. 8. Be able to identify a galaxy by its shape, according to the Hubble sequence. 9. Compare and contrast elliptical galaxies and spir ...
... nucleus of our Galaxy, and what is the probable explanation? 7. Describe the factors involved in galactic formation, including the role of collisions between galaxies. 8. Be able to identify a galaxy by its shape, according to the Hubble sequence. 9. Compare and contrast elliptical galaxies and spir ...
Unit 3 - Lesson 8.1 2011 Night Sky
... for more than 2,000 years. The calendar is divided into Seven Ages of Man. The fourth epoch ended in August 1987. The Mayan calendar comes to an end on Sunday, December 23, 2012. Only a few people will survive the catastrophe that ensues. In the fifth age, humanity will realize its spiritual destiny ...
... for more than 2,000 years. The calendar is divided into Seven Ages of Man. The fourth epoch ended in August 1987. The Mayan calendar comes to an end on Sunday, December 23, 2012. Only a few people will survive the catastrophe that ensues. In the fifth age, humanity will realize its spiritual destiny ...
A fascinating tour of the cosmos — from Earth orbit.
... Jupiter; storms on Saturn, Uranus, and Neptune; and the faraway worlds of Pluto and Quaoar. Beyond the solar system, we explore protoplanetary disks in the Orion Nebula, and regions of starbirth across the cosmos. We witness the deaths of stars like our Sun; the cataclysmic aftermath of supernovae i ...
... Jupiter; storms on Saturn, Uranus, and Neptune; and the faraway worlds of Pluto and Quaoar. Beyond the solar system, we explore protoplanetary disks in the Orion Nebula, and regions of starbirth across the cosmos. We witness the deaths of stars like our Sun; the cataclysmic aftermath of supernovae i ...
OP/IP27 Stars HR life of stars WS
... What is the definition of Main Sequence? ______________________________________________________________________ ____________________________________________________________________ _____________________________________________________________________ ...
... What is the definition of Main Sequence? ______________________________________________________________________ ____________________________________________________________________ _____________________________________________________________________ ...
department of physics - Bishopston Comprehensive School Moodle
... Now we’ve just discussed the Doppler effect using sound waves, but the Doppler effect applies to ALL waves not just sound waves. So for example if we looked at stars from a distant galaxy and the light wave received on earth was slightly stretched, then that would mean that the galaxy must be moving ...
... Now we’ve just discussed the Doppler effect using sound waves, but the Doppler effect applies to ALL waves not just sound waves. So for example if we looked at stars from a distant galaxy and the light wave received on earth was slightly stretched, then that would mean that the galaxy must be moving ...
Lecture 1 - SUNY Oswego
... Luminosity: total energy radiated into space/second: Watts, Sun’s luminosity is about 4*1026 Watts Magnitude, M = -2.5*log L + const. Vega defined to have zero magnitude. Absolute and apparent magnitude mv-MV = 5logd – 5; inverse square law, B = L/4πd2 Magnitudes in certain wavelength ranges, U,B,V, ...
... Luminosity: total energy radiated into space/second: Watts, Sun’s luminosity is about 4*1026 Watts Magnitude, M = -2.5*log L + const. Vega defined to have zero magnitude. Absolute and apparent magnitude mv-MV = 5logd – 5; inverse square law, B = L/4πd2 Magnitudes in certain wavelength ranges, U,B,V, ...
11 Astronomy
... •# of planets/star that can sustain life •fraction which evolve life •fraction which evolve intelligent life •fraction which evolve technological civilization •lifetime of technological civilization Hunt for planets •A planet would cause a wobble in a star •That wobble can be seen in the light wave ...
... •# of planets/star that can sustain life •fraction which evolve life •fraction which evolve intelligent life •fraction which evolve technological civilization •lifetime of technological civilization Hunt for planets •A planet would cause a wobble in a star •That wobble can be seen in the light wave ...
Atomic Emissions LAB Questions
... EACH ELEMENT HAS A UNIQUE SET OF SPECTAL LINES (IS LIKE A FINGER PRINT). F. Why is it possible for a sample of the element hydrogen, in which each atom only has one electron, to have an emission spectrum with more than one color of light? A SAMPLE HAS MANY ATOMS; EACH ELECTRON IN EACH ATOM WILL MOVE ...
... EACH ELEMENT HAS A UNIQUE SET OF SPECTAL LINES (IS LIKE A FINGER PRINT). F. Why is it possible for a sample of the element hydrogen, in which each atom only has one electron, to have an emission spectrum with more than one color of light? A SAMPLE HAS MANY ATOMS; EACH ELECTRON IN EACH ATOM WILL MOVE ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.