FANDOM


Y

A Class Y star is the dimmest type of star, classed as a sub-brown dwarf that may not be large enough to undergo deuterium fusion[1]. A typical Class Y star has a temperature of around 300 - 400 K, a mass of around 7-13 times that of Jupiter, and a similar radius to Jupiter.[2] They are often classified as large rogue planets.

Examples

  • WISE 0855−0714, the coldest known brown dwarf[3][4]
  • These are the 7 Y-type stars discovered by J. Davy Kirkpatrick et al. in 2012:[5]
    • WISE 0146+4234
    • WISE 0350−5658
    • WISE 0359−5401
    • WISE 0535−7500
    • WISE 0713−2917
    • WISE 0734−7157
    • WISE 2220−3628

See also

Stellar Classes
Ω · N · D · Y · T · L · M · K · G · F · A · B · O
Brown Dwarf Classes
Y · T · L

References

  1. Various; Brown dwarf - Wikipedia, the free encyclopedia
  2. Various; Stellar classification - Wikipedia, the free encylopedia
  3. Various; WISE 0855−0714 - Wikipedia, the free encyclopedia
  4. Simbad database; WISEA J085510.74-071442.5
  5. Kirkpatrick, J. D., Gelino, C. D., Cushing, M. C. et al.; Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function