Webb’s newest look at planetary nebula NGC 6072 in the near- and mid-infrared shows what may appear as a very messy scene resembling splattered paint. However, the unusual, asymmetrical scene hints at more complicated mechanisms underway, as the star central to the scene approaches the very final stages of its life and expels shells of material, losing up to 80 percent of its mass.
Since their discovery in the late 1700s, astronomers have learned that planetary nebulae, or the expanding shell of glowing gas expelled by a low-intermediate mass star late in its life, can come in all shapes and sizes. Most planetary nebulae present as circular, elliptical, or bi-polar, but some stray from the norm, as seen in new high-resolution images of the planetary nebula NGC 6072 by the NASA/ESA/CSA James Webb Space Telescope.
In Webb’s NIRCam (Near-Infrared Camera) view of the object, it’s readily apparent that this nebula is multi-polar. This means there are several different elliptical outflows jetting out either way from the centre. These outflows compress gas towards the equatorial plane and create a disc. Astronomers say this is evidence that there are likely at least two stars at the centre of this scene. Specifically, a companion star is interacting with an aging star that had already begun to shed some of its outer layers of gas and dust.
The central region of the planetary nebula glows from the hot stellar core, seen as a light blue hue in near-infrared light. The dark orange material, which is made up of gas and dust, follows pockets or open areas that appear dark blue. This clumpiness could be created when dense molecules formed while being shielded from hot radiation from the central star. There could also be a time element at play. Over thousands of years, inner fast winds could be ploughing through the halo cast off from the main star when it first started to lose mass.
The longer wavelengths captured by Webb’s MIRI (Mid-Infrared Instrument) are highlighting dust, revealing the star researchers suspect could be central to this scene. It appears as a small pink-white dot in this image. Webb’s look in the mid-infrared wavelength also reveals concentric rings expanding from the central region, the most obvious circling just past the edges of the lobes.
This may be additional evidence of a secondary star at the centre of the scene hidden from our view. The secondary star, as it circles repeatedly around the original star, could have carved out rings of material in a spiral pattern as the main star was expelling mass during an earlier stage of its life.
The red areas in NIRCam and blue areas in MIRI both trace cool molecular gas (likely molecular hydrogen) while central regions trace hot ionized gas.
Planetary nebulae will remain a topic of study for astronomers using Webb who hope to learn more about the full life cycle of stars and how they impact their surrounding environments. As the star at the centre of a planetary nebula cools and fades, the nebula will gradually dissipate into the interstellar medium — contributing enriched material that helps form new stars and planetary systems, now containing those heavier elements.
Webb’s imaging of NGC 6072 opens the door to studying how the planetary nebulae with more complex shapes contribute to this process.
NGC 6072 (NIRCam image)
The NASA/ESA/CSA James Webb Space Telescope’s view of planetary nebula NGC 6072 in the near-infrared shows a complex scene of multiple outflows expanding out at different angles from a dying star at the centre of the scene. These outflows push gas toward the equatorial plane, forming a disc.
Astronomers suspect there is at least one other star interacting with the material cast off by the central dying star, creating the abnormal appearance of this planetary nebula.
In this image, the red areas represent cool molecular gas, for example, molecular hydrogen.
[Image description: colourful mostly red image of near-infrared light from a glowing cloud with a distorted, asymmetrical shape, illuminated from within by a bright central star. The asymmetrical shape resembles paint splattered on the ground. In the centre of this image, a light blue glow casts over areas of dark pockets that appear dark blue and are traced with orange material. It has a clumpy appearance. The shells become a deeper red with distance from the centre. The shells appear as lobes that push gas toward the equatorial plane, forming a disc. The background of the image is black and speckled with tiny bright stars and distant galaxies.]
Credit:
NASA, ESA, CSA, STScI
NGC 6072 (MIRI image)
The mid-infrared view of planetary nebula NGC 6072 from the NASA/ESA/CSA James Webb Space Telescope shows expanding circular shells around the outflows from the dying central star, which astronomers suspect is that pinkish white dot at the centre of the image. The longer wavelengths captured by Webb’s MIRI (Mid-Infrared Instrument) highlight the dust being cast off by the central dying star.
In this image, the blue represents cool molecular gas seen in red in the image from Webb’s NIRCam (Near-Infrared Camera) due to colour mapping.
[Image description: colourful, mostly blue, image of mid-infrared light from a glowing cloud with a distorted, asymmetrical shape. A star at the centre of the image is a small point of pinkish-white light. The asymmetrical shape of the expanding cloud of gas and dust resembles paint splattered on the ground. The filaments of the expanding shells are wispy, and mostly white and blue. The shells appear as lobes that push gas toward the equatorial plane, forming a disc. A perfect circle of white-ish blue dust traces the outer edges of the shells. The background of the image is black and speckled with tiny bright stars and distant galaxies.]
Credit:
NASA, ESA, CSA, STScI
NGC 6072 (annotated NIRCam image)
This image of NGC 6072, captured by the James Webb Space Telescope’s NIRCam (Near-Infrared Camera), shows compass arrows, scale bar, and colour key for reference.
The north and east compass arrows show the orientation of the image on the sky. Note that the relationship between north and east on the sky (as seen from below) is flipped to the direction arrows on a map of the ground (as seen from above).
The scale bar is labeled in light-years, which is the distance that light travels in one Earth-year (it takes 0.5 years for light to travel a distance equal to the length of the scale bar). One light-year is equal to about 9.46 trillion kilometers.
This image shows invisible near-infrared wavelengths of light that have been translated into visible-light colours. The colour key shows which NIRCam filters were used when collecting the light. The colour of each filter name is the visible light colour used to represent the infrared light that passes through that filter.
[Image description: Webb image of NGC 6072 with compass arrows, scale bar, and colour key. It has a mostly red image of near-infrared light from a glowing cloud with a distorted, asymmetrical shape, illuminated from within by a bright central star. In the centre of this image, a light blue glow casts over areas of dark pockets that appear dark blue and are traced with orange material. It has a clumpy appearance. The shells become a deeper red with distance from the center. At the bottom right is a scale bar labeled .5 light-years. The length of the scale bar is about one fifth of the total image. At the bottom right are compass arrows indicating the orientation of the image on the sky. Below the image is a colour key showing which NIRCam filters were used to create the image and which visible-light colour is assigned to each filter.
Credit:
NASA, ESA, CSA, STScI
VIDEOS
Pan video: NGC 6702 (NIRCam image)
The NASA/ESA/CSA James Webb Space Telescope’s view of planetary nebula NGC 6072 in the near-infrared shows a complex scene of multiple outflows expanding out at different angles from a dying star at the centre of the scene. These outflows push gas toward the equatorial plane, forming a disc.
Astronomers suspect there is at least one other star interacting with the material cast off by the central dying star, creating the abnormal appearance of this planetary nebula.
In this image, the red areas represent cool molecular gas, for example, molecular hydrogen.
Credit:
NASA, ESA, CSA, STScI, N. Bartmann (ESA/Webb)
Music: Stellardrone - Twilight
Pan video: NGC 6072 (MIRI image)
The mid-infrared view of planetary nebula NGC 6072 from the NASA/ESA/CSA James Webb Space Telescope shows expanding circular shells around the outflows from the dying central star, which astronomers suspect is that pinkish white dot at the centre of the image. The longer wavelengths captured by Webb’s MIRI (Mid-Infrared Instrument) highlight the dust being cast off by the central dying star.
In this image, the blue represents cool molecular gas seen in red in the image from Webb’s NIRCam (Near-Infrared Camera) due to colour mapping.
Credit:
NASA, ESA, CSA, STScI, N. Bartmann (ESA/Webb)
Music: Stellardrone - Billions and Billions
Transition video: NGC 6072 (NIRCam and MIRI images)
Webb’s newest look at planetary nebula NGC 6072 in the near- and mid-infrared shows what may appear as a very messy scene resembling splattered paint. However, the unusual, asymmetrical scene hints at more complicated mechanisms underway, as the star central to the scene approaches the very final stages of its life and expels shells of material, losing up to 80 percent of its mass.
Credit:
NASA, ESA, CSA, STScI, N. Bartmann (ESA/Webb)
Music: Stellardrone - The Night Sky in Motion
Fuente: ESA/Hubble/Webb Information Centre
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