Category Astronomy/Space

Astronomers Solve the Case of Missing Carbon Monoxide in Protoplanetary Disks

Credit Required: M.Weiss/Center for Astrophysics | Harvard & Smithsonian

Astronomers frequently observe carbon monoxide in planetary nurseries. The compound is ultrabright and extremely common in protoplanetary disks—regions of dust and gas where planets form around young stars—making it a prime target for scientists.

But for the last decade or so, something hasn’t been adding up when it comes to carbon monoxide observations, says Diana Powell, a NASA Hubble Fellow at the Center for Astrophysics, Harvard & Smithsonian. A huge chunk of carbon monoxide is missing in all observations of disks, if astronomers’ current predictions of its abundance are correct.

Now, a new model—validated by observations with ALMA—has solved the mystery: carbon monoxide has been hiding in ice format...

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Seeing Universe’s Most Massive Known Star

This comparison image shows the exceptional sharpness and clarity of the Zorro imager on the 8.1-meter Gemini South telescope in Chile (left) when compared to an earlier image taken with the NASA/ESA Hubble Space Telescope (right). The new Gemini South image allowed astronomers to clearly distinguish the star R136a1 from its nearby stellar companions, providing the data needed to reveal that – while still the most massive star known in the Universe – it is less massive than previously thought. 

Credit: International Gemini Observatory/NOIRLab/NSF/AURA
Acknowledgment: Image processing: T.A. Rector (University of Alaska Anchorage/NSF’s NOIRLab), M. Zamani (NSF’s NOIRLab) & D. de Martin (NSF’s NOIRLab); NASA/ESA Hubble Space Telescope 

Groundbreaking observation from Gemini Observ...

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One of the Brightest Stars in the Sky is Evolving and Dying Before our Eyes

Four panels of artistic drawing of Betelgeuse. First panel, a small burst on the surface of the star is seen. On the 2nd, the material has begun to leave the star, the 3rd shows the material dark as it cools, and the 4th is the star back to normal
Artist’s impression of the aftermath of the SME, with the mass cooling and forming a cloud of dust which dimmed the star for a short period of time. The plot below outlines the real and expected brightness changes of Betelgeuse during this time. Credits: NASA, ESA, Elizabeth Wheatley (STScI)

Nothing lasts forever, including the stars in our night sky. One of the brighter and more notable stars in our sky is Betelgeuse, the bright red supergiant in the shoulder of Orion.

In late 2019, astronomers around the world grew giddy with excitement, because we saw this giant star get fainter than we’ve ever seen it before. Since Betelgeuse is at the end stages of its life, there was some speculation this might be a death rattle before the end.

But the cause of the “great dimming” wasn’t ...

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Ready for its close-up: New Technology Sharpens Images of Black Holes

Credit: Broderick et al. 2022, ApJ, 935, 61

Using new computational algorithms, scientists have measured a sharp ring of light predicted to originate from photons whipping around the back of a supermassive black hole.

When scientists unveiled humanity’s historic first image of a black hole in 2019 — depicting a dark core encircled by a fiery aura of material falling toward it — they believed even richer imagery and insights were waiting to be teased out of the data.

Simulations predict that, obscured by that bright orange glow, there should exist a thin, bright ring of light created by photons flung around the back of the black hole by its intense gravity.

Now, a team of researchers has combined theoretical predictions and sophisticated imaging algorithms to “remaster” the ori...

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