What kind of spectral class is the Sun?
class G star
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.
What is the spectral type luminosity class of the Sun?
G2V
Since our Sun is a star, we can classify it according to its spectral and luminosity classes. The Sun is an example of a main sequence star, of spectroscopic type G2. Therefore, the combined color and luminosity class for the Sun is G2V (the same as alpha Centauri).
What are the spectral types of?
Types of Stars
Spectral Type | Color | Temperature Range |
---|---|---|
B | Blue-white | 10,000 K – 30,000 K |
A | White | 7,500 K – 10,000 K |
F | Yellow-white | 6,000 K – 7,500 K |
G | Yellow | 5,000 K – 6,000 K |
Is the Sun a Type 1 star?
Our Sun is a relatively dirty, Type I star – which is probably a very, very good thing, because otherwise there might not have been enough “dirt” floating around the early solar system to form the Earth!
What spectral type is the hottest?
Spectral Classification of Stars
- 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.
How many types of Suns are there?
Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.
What is meant by spectral class?
spec′tral type′ n. a category for classifying a star according to features of its spectrum that indicate its surface temperature and chemical composition.
What determines spectral type?
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.
Which spectral type is the hottest?
What is spectral type in astronomy?
: the type of a star described primarily according to its surface temperature by means of alphabetic categories (such as O, B, A, F, G, K, and M), decimal subdivisions of the categories, and sometimes symbols indicating special characteristics (such as e for stars with bright emission lines, d for dwarfs, and g for …
What does spectral type tell you?
How do you find the spectral type of a star?
So the star is a type F star. The star whose spectrum you identified is shown to the right. (The picture shows two stars close together; the star you identified is the larger one on the bottom left.) T = 2.897 x 10-3 m K / lpeak….Exercise 5.
Plate | Fiber |
---|---|
266/51630 | 344 |
273/51957 | 391 |
282/51658 | 527 |
281/51614 | 398 |
What spectral type is the hottest star?
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 spectral type is the coolest?
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.
What is spectral type based on?
What spectral class is the brightest?
Yerkes spectral classification
Luminosity class | Description | Examples |
---|---|---|
II | bright giants | Beta Leporis – G0II |
III | normal giants | Arcturus – K0III |
IV | subgiants | Gamma Cassiopeiae – B0.5IVpe |
V | main-sequence stars (dwarfs) | Achernar – B6Vep |