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21 Aug, 2019
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File:Webb Snaps Detailed Infrared Image Of Actively Forming Stars ESA25024852.jpg

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HH 46/47

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- Herbig-Haro-Objekt
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Author	Space Telescope Science Institute Office of Public Outreach
Source	ESA/Webb
Credit/Provider	NASA, ESA, CSA, J. DePasquale (STScI)
Short title	Herbig-Haro 46/47 (NIRCam image)
Image title	The NASA/ESA/CSA James Webb Space Telescope has captured a high-resolution image of a tightly bound pair of actively forming stars, known as Herbig-Haro 46/47, in near-infrared light. Look for them at the centre of the red diffraction spikes. The stars are buried deeply, appearing as an orange-white splotch. They are surrounded by a disc of gas and dust that continues to add to their mass. Herbig-Haro 46/47 is an important object to study because it is relatively young— only a few thousand years old. Stars take millions of years to form. Targets like this also give researchers insight into how stars gather mass over time, potentially allowing them to model how our own Sun, a low-mass star, formed. The two-sided orange lobes were created by earlier ejections from these stars. The stars’ more recent ejections appear as blue, thread-like features, running along the angled diffraction spike that covers the orange lobes. Actively forming stars ingest the gas and dust that immediately surrounds them in a disc (imagine an edge-on circle encasing them). When the stars ‘eat’ too much material in too short a time, they respond by sending out two-sided jets along the opposite axis, settling down the star’s spin, and removing mass from the area. Over millennia, these ejections regulate how much mass the stars retain. Don’t miss the delicate, semi-transparent blue cloud. This is a region of dense dust and gas, known as a nebula. Webb’s crisp near-infrared image lets us see through its gauzy layers, showing off a lot more of Herbig-Haro 46/47, while also revealing a wide range of stars and galaxies that lie far beyond it. The nebula’s edges transform into a soft orange outline, like a backward L along the right and bottom of the image. The blue nebula influences the shapes of the orange jets shot out by the central stars. As ejected material rams into the nebula on the lower left, it takes on wider shapes, because there is more opportunity for the jets to interact with molecules within the nebula. Its material also causes the stars’ ejections to light up. Over millions of years the stars in Herbig-Haro 46/47 will form fully — clearing the scene. Take a moment to linger on the background. A profusion of extremely distant galaxies dot Webb’s view. Its composite NIRCam (Near-Infrared Camera) image is made up of several exposures, highlighting distant galaxies and stars. Blue objects with diffraction spikes are stars, and the closer they are, the larger they appear. White-and-pink spiral galaxies sometimes appear larger than these stars, but are significantly farther away. The tiniest red dots, Webb’s infrared specialty, are often the oldest, most distant galaxies. [Image description: At the centre is a thin horizontal orange cloud tilted from bottom left to top right. It takes up about two-thirds of the length of this angle, but is thin at the opposite angle. At its centre is a set of very large red and pink diffraction spikes in Webb’s familiar eight-pointed pattern. It has a central yellow-white blob, which hides two tightly orbiting stars. The background is filled with stars and galaxies.]
Usage terms	Creative Commons Attribution 4.0 International License
Date and time of data generation	16:00, 26 July 2023
Software used	Adobe Photoshop 24.1 (Macintosh)
File change date and time	16:10, 10 July 2023
Date and time of digitizing	12:24, 21 June 2023
Date metadata was last modified	08:03, 11 July 2023
Unique ID of original document	xmp.did:4cb62f76-89ad-4e22-9bf8-4b2205095ec2
Keywords	HH 46/47
Contact information	outreach@stsci.edu https://esawebb.org ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States 410-338-4444
IIM version	4

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