Astronomers MIRI (mid-infrared measuring instrument) camera The NASA/ESA/CSA James Webb Space Telescope probe has captured striking new photos of molecular cloud L1527.
L1527, shown in this image from Webb's MIRI instrument, is a molecular cloud enveloping the IRAS 04368+2557 protostar. The more diffuse blue light and filamentary structures in the image come from organic compounds called polycyclic aromatic hydrocarbons (PAHs), while the red in the center of the image is a thick layer of energetic gas and dust that surrounds the protostar. The white intermediate regions are a mix of PAHs, ionized gases, and other molecules. Image courtesy of NASA / ESA / CSA / STScI.
L1527, also known as LDN 1527, is located about 447 light-years from Earth in the constellation Taurus.
The young protostar, called IRAS 04368+2557, is embedded in a molecular cloud that is part of a star-forming region in the constellation Taurus.
IRAS 04368+2557 is a relatively young star, only 100,000 years old.
Given its age and brightness in the far-infrared, the star is likely a class 0 protostar, the earliest stage of star formation.
IRAS 04368+2557 has an edge-on disc with two misaligned parts.
The inner and outer parts of the disk have slightly different orbital planes and are connected at 40 to 60 AU (astronomical units) from the protostar, but the disk is point-symmetric with respect to the location of the protostar.
Webb's previous observations of L1527 showed that NIRCam (Near Infrared Camera)Astronomers were able to peer into the region, where the molecular cloud and protostar appeared in opaque, vibrant colors.
Both NIRCam and MIRI show the effects of outflows that shoot out in opposite directions along the protostar's rotation axis as the protostar consumes gas and dust from the surrounding cloud.
These outflows take the form of bow shock waves relative to the surrounding molecular cloud and appear as filament-like structures throughout the molecular cloud.
They also energize, or excite, the material around them, causing the areas above and below them to glow, imprinting bright hourglass structures in the molecular cloud.
“But unlike NIRCam, which primarily images light reflected from dust, MIRI will be able to probe how these outflows affect the thickest dust and gas in the region,” astronomer Webb said in a statement.
“The blue region that takes up most of the hourglass represents carbonaceous molecules called polycyclic aromatic hydrocarbons.”
“The IRAS 04368+2557 protostar itself is shown in red, along with the dense mixture of dust and gas that surrounds it.”
“Meanwhile, MIRI revealed white regions just above and below the protostar, which are not as clearly visible in the NIRCam view.”
“This region is a mixture of hydrocarbons, ionized neon, and thick dust, indicating that the protostar is consuming material from the disk in a promiscuous manner, pushing this material over great distances.”
“As IRAS 04368+2557 continues to age and emits energetic jets, it will consume, destroy or push aside much of this molecular cloud, and much of the structure seen here will begin to disappear.”
“Eventually, when the accumulation of mass stops, this impressive spectacle will come to an end and the star itself will become more clearly visible to optical telescopes.”
“Combining both near-infrared and mid-infrared analyses will shed light on the overall behavior of this system, including how the central protostar is influencing the surrounding region.”
“Other stars in Taurus, the star-forming region in which L1527 resides, may form in exactly this way, which could lead to the disruption of other molecular clouds, either preventing the formation of new stars or promoting their development.”
Source: www.sci.news
