Astronomy 1 Project #4 Hertzsprung-Russell Diagram, Slides of Astronomy

Download Astronomy 1 Project #4 Hertzsprung-Russell Diagram and more Slides Astronomy in PDF only on Docsity! Astronomy 1 ID: _____________ Name:_____________ Astronomy 1 Project #4 Hertzsprung-Russell Diagram In this project, we will draw a HR diagram and study its meaning. This quiz is due on 7/12. 1. The table below shows temperatures and luminosities of various stars. Note that the sun is used as a standard of brightness (Brightness=1). The brightness of a star shows how the star compares with the sun. 2. A temperature of a star can be estimated by its spectral type and it is written in Kelvin. (0K = -273°C) Table 1 Star Name Temperature (K) Brightness (Luminosity) Sun = 1 1 SUN 5600 1 2 ALPHA CENTAURI A 5800 1.3 3 ALPHA CENTAURI B 4200 0.36 4 BARNARD’S STAR 2800 0.0004 5 LALANDE 21185 3200 0.005 6 SIRIUS A 10400 23 7 SIRIUS B 10700 0.008 8 ROSS 248 2700 0.0001 9 61 CYGNI A 4200 0.08 10 61 CYGNI B 3900 0.04 11 PROCYON A 6500 7.6 12 PROCYON B 7400 0.0005 13 EPSILON INDI 4200 0.13 14 CANOPUS 7400 1500 15 ARCTURUS 4500 90 16 VEGA 10700 60 17 CAPELLA 5900 150 18 RIGEL 11800 40000 19 BETELGEUSE 3200 17000 20 ACHERNAR 14300 200 21 BETA CENTAURI 21300 3300 22 ALTAIR 8000 10 23 ALDEBARAN 4200 90 24 SPICA 21300 1900 25 ANTARES 3400 4400 26 DENEB 10200 40000 27 BETA CRUCIS 22300 6000 Astronomy 1 ID: _____________ Name:_____________ 3. Using the chart above to complete the HR diagram in the graph sheet below. a. The vertical axis is luminosity and the horizontal axis is temperature. b. Plot 27 points on the graph below. (This is logarithmic scale, so the scale is not uniform.)