The study analyzed the rotation curves of the galaxy's stars and the density of hydrogen gas and found that ordinary luminous matter appeared to account for all of the galaxy's mass. In 2008 a study was published showing that M94 had very little or no dark matter present. In the case of M94, this pseudobulge takes the form of a ring around a central oval-shaped region. In contrast, a galaxy with a pseudobulge does not have a large bulge of old stars but instead contain a bright central structure with intense star formation that looks like a bulge when the galaxy is viewed face-on. A classical spiral galaxy consists of a disk of gas and young stars that intersects a large sphere (or bulge) of older stars. In a paper published in 2004, John Kormendy and Robert Kennicutt argued that M94 contains a prototypical pseudobulge. Therefore, the report concludes that the inner disk of M94 is an oval distortion which led to the creation of this galaxy's peripheral disk. However, further research found problems with each of these scenarios. There are several possible external events that could have led to the origin of M94's outer disk including the accretion of a satellite galaxy or the gravitational interaction with a nearby star system. In fact, the star formation rate of the outer disk is approximately two times greater than the inner disk because it is more efficient per unit of stellar mass. It contains approximately 23% of the galaxy's total stellar mass and contributes about 10% of the galaxy's new stars. The study found that the outer disk of this galaxy is active. Ī 2009 study conducted by an international team of astrophysicists revealed that the outer ring of M94 is not a closed stellar ring, as historically attributed in the literature, but a complex structure of spiral arms when viewed in mid-IR and UV. This star formation is fueled by gas driven dynamically into the ring by the inner oval-shaped bar-like structure. The inner ring is the site of strong star formation activity and is sometimes referred to as a starburst ring.

These rings appear to form at resonance points in the disk of the galaxy. M94 has an inner ring with a diameter of 70 arcseconds (″) (given its distance, about 5,400 light-years (1,700 pc)) and an outer ring with a diameter of 600″ (about 45,000 light-years (14,000 pc)). the atoms are missing relatively few electrons). LINERs in general are characterized by optical spectra that reveal that ionized gas is present but the gas is only weakly ionized (i.e. M94 is classified as having a low ionization nuclear emission region (LINER) nucleus. Structure Detail of the central area of M94 Although some references describe M94 as a barred spiral galaxy, the 'bar' structure appears to be more oval-shaped. It was discovered by Pierre Méchain in 1781, Īnd catalogued by Charles Messier two days later.

Messier 94 (also known as NGC 4736, Cat's Eye Galaxy, Crocodile Eye Galaxy, or Croc's Eye Galaxy ) is a spiral galaxy in the mid- northern constellation Canes Venatici.

Colors of autumn 94 4chan