Spectral class Y star ?
What is the spectral class Y star ?
I read about classes L & T which are at a lower temperature than M.
What is the temperature range of Y class stars ?
How many have been found so far ?
I assume they are brown dwarfs - is that correct ?
--
gautam
.
Relevant Pages
- Re: Gas planet found orbiting dying red giant star closer than Earth orbits Sun
... Actually the article did mention that the star is 1200 ly's away in Leo. ... the mass of HD 102272 before it went giant, it did not have enough fuel to expand as large as the sun will, so it must be of a lighter spectral class than the sun. ... The existing model can be used to extrapolate backwards in time to a pseudo-measurement of HD 102272's mass and spectral class before it went giant, and therefore, its position on the Hertzprung-Russell Diagram. ... I don't know the threshold for a star to become a red giant, but it almost certainly doesn't include the M class, and also maybe not the lower ranges of the K class. ...
(sci.astro) - Re: Spectrum!
... | Androcles wrote: ... That is WHY a Doppler shift does NOT change the spectral class ... the temperature of the star this way. ... So the surface temperature of a Cepheide do really ...
(sci.physics.relativity) - Re: A trinary system (G/M+A)
... The spectral class of Sirius is A1V, but it turns out to be ... The star with a silver lining? ...
(rec.arts.sf.science) |
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