by draconis variables造句

• Fomalhaut B is a flare star of the type known as a BY Draconis variable.
• This star is categorized as a BY Draconis variable, with variable star designation V2133.
• The star is a BY Draconis Variable.
• This is a BY Draconis variable star that undergoes brightness variations due to stellar activity.
• Its variable star designation is IL Aquarii and it is classified as a BY Draconis variable.
• It is a BY Draconis variable star that has been given the designation " BX Ceti ".
• It is a BY Draconis variable, a cool dwarf which varies rapidly in brightness as it rotates.
• It is categorized as a BY Draconis variable because of luminosity changes caused by surface rotation of the star.
• BY Draconis variables are cool dwarf stars which vary as they rotate due to star spots or other variations in their photospheres.
• Ross 248 is the first discovered BY Draconis variable, the variability having been identified by Gerald E . Kron on 1950.
• Red dwarfs and brown dwarfs exhibit two main forms of variability : they could be BY Draconis variables or flare stars, or both.
• It is a BY Draconis variable showing a rotational modulation with a period of 1.75 days, and has been observed to flare.
• "' HR 7578 "'( V4200 Sgr ) is a BY Draconis variable binary star located in the night sky at yr.
• It is a BY Draconis variable star with an active chromosphere, which means there is a rotational modulation of its luminosity due to star spots.
• It has been classified as a BY Draconis variable, and is one of the closest and hence brightest pre-main-sequence stars to Earth.
• It is a BY Draconis variable with a surface magnetic field strength of 750 G . The chromosphere is relatively inactive and possesses star spots comparable to Sun spots.
• Procyon, which is much brighter than the Sun and has a spectral type of F5 IV / V, is also claimed to be a BY Draconis variable.
• Epsilon Eridani is classified as a BY Draconis variable because it has regions of higher magnetic activity that move into and out of the line of sight as it rotates.
• AB Pictoris is a BY Draconis variable star with a substellar companion that is either a large planet or a brown dwarf, which was discovered by direct imaging in 2005.
• This variation in luminosity was interpreted to be the result of rotational modulation of star spot activity in the photosphere, and hence it is classified as a BY Draconis variable.