Sentences with phrase «subdwarf stars»

Unusually faint for its spectral type, Groombridge 1830 is a yellow - orange halo subdwarf star of spectral and luminosity type sdG8p / VI.

Not exact matches

The stars may be passing through a stage of stellar evolution that lasts no more than a few tens of thousands of years, the scientists say — a phase between red giants (about 30 or 40 times the size of our sun) and blue subdwarfs (stars about one - fifth the size of our sun but seven times hotter and 70 times brighter).

The star may even be suspected of being a dim subdwarf (sd / VI)-- like Groombridge 1830 or Kapteyn's Star — rather than a main - sequence dwarf star star may even be suspected of being a dim subdwarf (sd / VI)-- like Groombridge 1830 or Kapteyn's Star — rather than a main - sequence dwarf star Star — rather than a main - sequence dwarf star star (V).

Known as subdwarfs, these stars are also fusing hydrogen in their core and so they mark the lower edge of the main sequence's fuzziness resulting from chemical composition.

The central star of M27 is quite bright at mag 13.5, and an extremely hot blueish subdwarf dwarf at about 85,000 K (so the spectral type is given as O7 in the Sky Catalog 2000).

One of these, called the Groombridge 1830 group, consists of a number of subdwarfs and the star RR Lyrae, after which the RR Lyrae variables were named.

Kapteyn's Star is a dim red subdwarf or main sequence (sdM0 - 1.5 or V), halo star (John E. Gizis, 1997, page 809; and NASA Star and Exoplanet Database), which is thought to be originally a member of the Milky Way galaxy's luminous hStar is a dim red subdwarf or main sequence (sdM0 - 1.5 or V), halo star (John E. Gizis, 1997, page 809; and NASA Star and Exoplanet Database), which is thought to be originally a member of the Milky Way galaxy's luminous hstar (John E. Gizis, 1997, page 809; and NASA Star and Exoplanet Database), which is thought to be originally a member of the Milky Way galaxy's luminous hStar and Exoplanet Database), which is thought to be originally a member of the Milky Way galaxy's luminous halo.

NASA — larger image Kapteyn's Star is a very dim red subdwarf, somewhat bluer and dimmer than Gliese 623 A (M2.5 V) and B (M5.8 Ve) at lower right.