Which class of stars has the highest temperature?
Type O stars
Spectral types are a measure of the surface temperatures of stars and are letter designations: O, B, A, F, G, K, and M. Type O stars have the highest surface temperatures and can be as hot as 30,000 Kelvins.
What is the spectral order of stars from hottest to coolest?
From hottest to coldest, these seven spectral classes are designated O, B, A, F, G, K, and M. Recently, astronomers have added three additional classes for even cooler objects—L, T, and Y.
Which spectral class has the hottest main sequence?
O stars
Spectral types are named with a letter. The seven main types are M, K, G, F, A, B and O. M stars are the coldest stars and O stars are the hottest.
Are spectral type M stars the hottest stars?
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Most stars are currently classified under the Morgan–Keenan (MK) system using the letters O, B, A, F, G, K, and M, a sequence from the hottest (O type) to the coolest (M type).
What is the spectral type of the hottest stars?
The spectral sequence of stars runs OBAFGKM.
- O stars are the hottest, with temperatures from about 20,000K up to more than 100,000K.
- B stars have temperatures between about 10,000 and 20,000K.
- A stars have strong absorption lines of Hydrogen.
- F stars are slightly hotter than the Sun.
What star has a high temperature and high luminosity?
What type of star has a high temperature and a high luminosity? Blue Giants 19.
What spectral class is our sun?
G2V
According to its spectral class, the Sun is a G-type main-sequence star (G2V).
Do stars of the same temperature have the same spectral type?
Yes, some stars of the same temperature have the same spectral type. For example, star D & E have the same temperature and spectral type. Yes, for example, stars C & F have the same luminosity and the same absolute magnitude number.
What spectral class is the sun in?
The Sun is a class G star; these are yellow, with surface temperatures of 5,000–6,000 K. Class K stars are yellow to orange, at about 3,500–5,000 K, and M stars are red, at about 3,000 K, with titanium oxide prominent in their spectra.
How does spectral class relate to temperature?
The spectral types and sub-classes represent a temperature sequence, from hotter (O stars) to cooler (M stars), and from hotter (subclass 0) to cooler (subclass 9). The temperature defines the star’s “color” and surface brightness. Stars are also classified by luminosity class.
Which kind of star is hottest?
blue stars
The hotter the star, the further up the spectrum you go. The hottest stars are the blue stars. A star appears blue once its surface temperature gets above 10,000 Kelvin, or so, a star will appear blue to our eyes. So the hottest stars in the Universe are going to be a blue star, and we know they’re going to be massive.
Which spectral type of star has the coolest surface temperature?
M-type stars
M-type stars have surface temperatures between 2,400 and 3,700 K. They are the reddest and coolest of the common stellar spectral types.