RCW 19, also known as the Gum 38 nebula, is a striking astronomical object classified as an H II region. It lies in the southern constellation Centaurus and is a prominent example of the glowing interstellar clouds where star formation actively occurs. This nebula is named after its cataloging in the RCW (Rodgers, Campbell, and Whiteoak) catalog of southern emission nebulae and is approximately 9000 light years from Earth.
The vast cloud of ionized hydrogen gas of which RCW 19 is composed, is bathed in the energetic ultraviolet light of newly formed massive stars. This intense radiation ionizes the surrounding hydrogen, causing it to emit the characteristic red glow that is often observed in such nebulae. RCW 19 is interspersed with dark lanes of cooler, denser gas and dust, creating an intricate interplay of light and shadow within its structure. Tis particular rendition is composed of Hydrogen alpha (red), sulphur II (yellow) and oxygen III (blue) emission data.
This region is particularly noted for its active star-forming processes. Embedded within RCW 19 are young stellar objects (YSOs) and protostars, still in their early stages of evolution. These nascent stars are born from the gravitational collapse of dense molecular clouds within the nebula. Stellar winds and radiation from the young, hot stars sculpt the surrounding material, forming pillar-like structures and cavities that give the nebula its dramatic appearance.
The image is part of the Colours showcase. The images was completed using data from a remote hosting facility.
Planwave CDK24
PW L600
Moravian C3-61000 Pro
R, G, B, Ha, SII and OIIIfilters
ca. 20 hrs, Gain 0/2750, F6.5, 3962mm