Does Betelguese, Antares, Arcturuas, etc... ?

Question

Have their own planets orbiting around them?

(Forgive my bad spelling)

Answer 1

Probably.  But if memory serves, these are exceptionally large stars.  The lifetime of stars of this size is very short.  Life wouldn't have a chance to form before its planet was blown apart by the inevitable supernova.  

Answer 2

Most of your answers seem to be very positive. I am less sure.

The problem is two-fold.

These stars have short lifetimes.

When planets form from the protostars disk, it doesn't happen instantly. The solar system planets took ~1-10 million years to form.

The time for a high mass star to form is very short (shorter than for a 1 solar mass star), so there may not have been time for the dust to coalesce and accrete into planets. Then, once the star switched on (nuclear fusion began), the radiation pressure from the star clears out the small dust grains.

So I think that supergiants, especially the massive ones, are a lot less likely to have planets around them that stars liek the sun.

Answer 3

Very likely. But these stars are very heavy, so even a very large gas giant will not cause measurable oscillations, and they are also very large (a few astronomical units across), so no planet is capable of eclipsing the star far enough during a passage to make it measurable on Earth. Maybe, exploiting gravity lenses will allows us a better view on these stars one day.

Betelgeuse for example, is the third largest star as seen from Earth, with only the sun and R Doradus appearing larger. Also, it is currently undergoing strong fluctuations, which could mean it will go supernova soon. If it had habitable planets, the outbreaks of the star should have turned these planets into barren planets.

Antares has a small companion star, but this one is still badly researched - it's orbit period is around 900 years currently - a much smaller planet is even harder to detect.

Arcturus is, similar to Betelgeuse, undergoing strong fluctuations and seismic oscillations, which make it hard to detect planets with current technology on it.

Answer 4

Probably. With larger stars, their life span is shorter, so that for a super-massive star, there might not be enough time for planets to form from an accretion disk. These stars are all large stars, which makes their life span shorter than stars like the sun, and thus less likely to have planets. I believe most stars have planets.

Answer 5

Not that we know of. I suppose they might be there, undetected, but we don't know.