N44

N44 , also LHA 120-N44 or Henize 44 ^[1] - a complex of emission nebulae associated with a superbubble , belonging to the galaxy Big Magellanic Cloud , the satellite of the Milky Way , located in the constellation Golden Fish . ^{[2] [3] [4] The} individual components of N44 - both nebulae and star clusters - were discovered by John Herschel in the 1830s . As a single object, this complex was cataloged in 1956 by Karl Henise in his work “Catalogs of H-alpha emission stars and nebulae in the Magellanic Clouds” . ^[5] The diameter of the complex is estimated at 1000 St. years , and the distance to it is from 160,000 to 170,000 St. years. ^{[6] [7] [8]} The structure of the complex is formed by the radiation pressure of a group of 40 powerful blue stars located in its center. ^{[6] [8] The} inconsistent density of the substance of the complex led to the formation of several dust “pillars” that can conceal the stars formed in them. ^[6] As in all areas of active star formation, many of the stars in the center of the complex will eventually become supernovae ; variations in the density of N44 are probably also a consequence of a supernova explosion near the complex in the past, this is confirmed by the fact that N44 emits in the X-ray range . ^{[3] [9]}

N44
superbubble emission nebula
Central Nebula N44
Research history
Designations
Observational data ( Age J2000.0 )
Right ascension
Declination
Distance	160,000-170,000 St. years
Constellation	Golden fish
physical characteristics
Radius	1000 St. years

Complex N44 is generally classified as an emission nebula, as it contains many regions of ionized hydrogen . However, the three strongest emission lines of the N44 spectrum belong to singly ionized oxygen ( O II , with a wavelength of 372.7 nm), doubly ionized oxygen ( O III , 500.7 nm) and neutral hydrogen ( HI , Hα radiation, 656, 2 nm). ^{[8] [10]}