Table IV
TABLE IV SELECTED PARAMETERS OF STARS IN SUN’S NEIGHBORHOOD |
|||||
STAR |
DISTANCE |
RADIUS* |
MASS* |
RAD.VEL |
ROT. VEL |
1) Proxima Centauri |
4.24 |
0.154 |
0.122 |
-22.20 |
<0.1 |
2) Alpha Centauri A |
4.37 |
1.22 |
1.1 |
-21.4 |
2.7+-0.7 |
3) Alpha Centauri B |
4.37 |
0.86 |
0.907 |
-18.6 |
1.1+-0,8 |
4) Barnaard’s star |
5.96 |
0.196 |
0.144 |
-110.6 |
<2.5 |
5) Wolf 359 |
7.86 |
0.16 |
0.09 |
+19 |
<3.0 |
6) Sirius A |
8.6 |
1.71 |
2.063 |
-5.5 |
16 |
7) Luyten 726-8 |
8.73 |
0.14 |
0.102 |
+29 |
28.2 |
8) Ross 154 |
9.6 |
0.24 |
0.17 |
-10.7 |
3.5 |
9) Ross 248 |
10.29 |
0.16 |
0.136 |
-75.2 |
1.2 |
10) Ross 128 |
11 |
0.197 |
0.168 |
-31 |
N/A |
11) 61 Cygni A |
11.4 |
0.665 |
0.7 |
-65.9 |
N/A |
12) 61 Cygni B |
11.4 |
0.595 |
0.63 |
-64.4 |
N/A |
13) Procyon A |
11.46 |
2.05 |
1.50 |
-3.2 |
3.16 |
14) Epsilon Indi |
11.87 |
0.732 |
0.754 |
-40.4 |
1.46 |
15) Vega |
25 |
2.36 x 2.82 |
2.1 |
-13.9 |
20.48 |
16) Arcturus |
36.7 |
25.4 |
1.08 |
-5.19 |
2.4 |
17) Aldebaran |
65.3 |
44.13 |
1.16 |
54.26 |
3.5+-1.5 |
18) Beta Carinae |
113.2 |
6.8 |
3.5 |
-5.2 |
145.7 |
19) Achernar |
139 |
7.3 x 11.4 |
6.7 |
+16 |
250 |
20) Alha Arae |
270+-20 |
4.5 |
9.6 |
0 |
375 |
21) Canopus |
310 |
71 |
8 |
+20.3 |
9 |
22) Polaris |
323-433 |
37.5 |
5.4 |
-17 |
14 |
23) Pleione |
392 |
3.2 |
3.4 |
+4.4 |
329 |
24) Epsilon Aurigae |
653-1,500 |
143-358 |
2.2-15 |
10.4 |
54 |
25) PZ Cassiopeiae |
2810 |
1062 |
N/A |
-45.68 |
45 |
26) Rho Cassiopeiae |
~3,400 |
636-981 |
40 |
-47 |
25 |
27) VY Canis Majoris |
~3,820 |
1420 |
17 |
41 |
300 |
28) KY Cygni |
~3,600 |
672 |
25 |
N/A |
N/A |
29) UY Scuti |
~5,100 |
755 |
7-10 |
+18.33 |
18 |
30) V382 Carinae |
5,930 |
485 |
20 |
+6 |
57+-15 (?) |
31) V915 Scorpii |
5436 |
760 |
N/A |
+46 |
N/A |
32) Eta Carinae |
7,500 |
~240 |
120-200 |
-25 |
N/A |
33) VFTS 102 |
164,000 |
N/A |
~25 |
+228 |
610+-30 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The data for this table were derived from published material online, mainly from Wikipedia.org but, some were confirmed or corrected by values posted in other sites, as well as from nasa.gov website
- = Radius and mass are expressed as multiples of solar radius or solar mass
- N/A= Data not available
Table IV: This table compares the equatorial radii, masses, distances from earth, radial velocities (the stars’ movement across the galaxy), and the speeds of the axial rotation of a selection of stars in the Milky Way Galaxy; the stars were randomly selected based mainly on their radii compared to those of our sun and listed in increasing order of distances from earth. The only other consideration was the availability of essential data such as mass, radius, radial velocity and rotational velocity. Although there is a definite suggestion of increased axial rotation rates with the masses and radii, when both the radii and masses are similar, (stars 1-15, 19 and 23) it is not strictly linear. It is also noteworthy that both the availability of complete data and similar values of masses and radii are in stars that are the closest to the sun. This means the readings are more accurate and more available for close-by stars. When the radii and masses do not correspond, which also are in stars that are much farther away, the rotational values are quite unpredictable. Even so, one does notice larger rotational speeds in larger stars (stars 18, 19,20, 33). We infer from the above that the farther away the stars are from the observers, the less accurate the readings are. Therefore, only with more accurate readings in the future can we have conclusive evidence for the patterns of stars’ behavior. In general, we believe, the data presented in this table does not refute our contention that the larger a star, faster it will rotate on its axis.