Download Create a HR Diagram - EarthSpaceScience

Create a H-R Diagram
(15 Pts)
Objective:
Use that Table of stars and plot them on the Empty H-R diagram based on
Luminosity and Spectral Class. Use circles or shading to correctly label the Main
Sequence, Giants, and Dwarfs. Then use your diagram to answer the questions.
Stars:
Star Name
Stellar mass Spectral
(Solar mass) Class
The Sun
1
G2
Vega
2.1
A0
Rigel
17
B8
Cygni A
1.02
G8
Pollux
1.86
K0
Spica
11
O5
Sirius A
2
A2
Sirius B
0.9
B5
Proxima Centauri
0.123
M5
Alpha Centauri A
1.1
G2
Betelgeuse
14
M2
Arcturus
1.5
K1.5
Bernard’s Star
0.1
M2
Polaris
4.3
F7
Achenar
6
B3
Bellatrix
8
B0
Make sure to label each star with its name!
H-R
Rubric
(15 Pts)
Awesome
Good
Luminosity
(Solar units)
1
37
66,000
.6
32
13,400
25.4
0.026
0.0017
1.5
63,000
210
0.02
2,100
3,311
4,500
Good
Enough
Apparent
Magnitude
-26.8
0
+0.18
+5.96
+1.15
+1.04
-1.47
+8.3
+11
-0.01
+.58
-0.04
+9.8
+1.97
+0.5
+1.64
Not Good
Enough
Really? No
5
4
3
2
1
Star Position
All stars are in
the correct
position (to the
mm) all stars
are labeled
All stars are
plotted most
are within a
cm
All stars
are plotted
Most stars
are plotted
Star
Groupings
All stars are
in the correct
position (to
the cm) all
stars are
labeled
All three
groups are
marked,
Correctly
included most
stars,
And labeled
All three
groups are
Marked,
Correctly
included all
stars,
And
Clearly labeled
All Questions
All Questions
are answered
are answered
All are correct Most are
correct
All the
groups are
marked and
include all
of the stars
There are
stars not
included in
one of the
groups
There is a
group
missing:
(Main
sequence,
Dwarf,
and Giant)
All
Questions
are
answered
Most
questions
are
answered
Less then
half the
questions
are
answered
Questions
Questions:
1. What color is the hottest?
2. What color is the coldest?
3. Which Star(s) are Main Sequence stars?
4. Which Star(s) are Giants?
5. Which Star(s) are Dwarfs?
6. Where are giants on the graph in terms of luminosity? Why do you think this
might be?
7. Which star is most like the sun?
8. How does color effect luminosity?
9. What can you speculate about Dwarf stars based on the color and luminosity?
10. What happens to stars of similar mass, as their temperature gets cooler?