4 ms·

Anyone knows which stars are the "outliers" in the first diagram? (the ones in the top-left and far right of it)

• sinuhe69 4y ago
  On the first diagram, the y-axis is the absolute brightness of the stars in the visible spectrum (V) and the x-axis is the difference between magnitude in blue (B) and the entire magnitude of the star in visible spectrum (V). Thus on the left-top we will see super bright stars, all in blue spectrum, super hot blue stars actually. One is R136a1, a super massive blue star with 200 M and a radius of 4.7 millions sun! Although 163000 ly away, it’s still visible because of its super brightness. Those super-hot blue stars are just a momentary capture of quick giants, who is about to transit to other states entirely. On the right side, we will see bright red giants. A good candidate would be the Garnet Star.
  • Maursault 4y ago
    > One is R136a1, a super massive blue star with 200 M and a radius of 4.7 millions sun! R136a1 has 196 solar masses, 42.7 solar radii, and its solar luminosity is 4.7M (4.677M), so it has a radiant flux of ~4.7M suns.