European Astronomical Society

The Distance to High-Velocity Cloud Complex M

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Thursday, January 12, 2023
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However new research suggests that the distance to HVC Complex M may be much closer—only 150 pc.

Key Points: 
  • However new research suggests that the distance to HVC Complex M may be much closer—only 150 pc.
  • These findings appear in a paper entitled " The Distance to High-Velocity Cloud Complex M " that has been accepted for publication in the Journal of Astrophysics.
  • If the distance to the Complex M is 150 pc, then the mass is about 120 solar masses.
  • As a result, other explanations for the larger-scale distribution of anomalous-velocity hydrogen are still very much in play, but the distance to Complex M gets us one step closer to unravelling the longstanding HVC mystery.

The Origin of High-Velocity Cloud Complex M

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Thursday, January 12, 2023
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WASHINGTON and SEATTLE, Jan. 12, 2023 /PRNewswire/ -- New research suggests that the High Velocity Cloud (HVC) Complex M may be the result of a supernova that blew up about four million years ago.

Key Points: 
  • WASHINGTON and SEATTLE, Jan. 12, 2023 /PRNewswire/ -- New research suggests that the High Velocity Cloud (HVC) Complex M may be the result of a supernova that blew up about four million years ago.
  • The findings will be featured in the Astrophysical Journal in a paper entitled Radio and Gamma-ray Evidence for the Supernova Origin of High Velocity Cloud Complex M : Schmelz, J.T.
  • Complex M is on the front (approaching) face.
  • "Complex M may have ridden the blast wave to reach the observed high velocities."

SOFIA Helps Reveal Why Cosmic Bubbles Are Leaking Out Into Space

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Wednesday, January 11, 2023
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Cosmic bubbles are blowing up earlier than expected, and research from the Stratospheric Observatory for Infrared Astronomy (SOFIA) can help explain why.

Key Points: 
  • Cosmic bubbles are blowing up earlier than expected, and research from the Stratospheric Observatory for Infrared Astronomy (SOFIA) can help explain why.
  • These protostellar outflows are also interacting with the bubble's shell, allowing the researchers to study the process in more depth.
  • This process is important for astronomers to study because of the role it plays in the dynamics of bubbles like Orion's Veil.
  • SOFIA was therefore unique in its ability to reveal this interaction, thanks to its spectral resolution and its ability to resolve the ionized carbon around protostars.

Magnetic Fields: Moving the Clouds in Cygnus-X?

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Monday, June 13, 2022
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Two of its clouds DR21 and W75N clearly have separate gas velocities, but which cloud is in front of the other, and whether or not the two clouds are colliding, are open questions.

Key Points: 
  • Two of its clouds DR21 and W75N clearly have separate gas velocities, but which cloud is in front of the other, and whether or not the two clouds are colliding, are open questions.
  • Dan Clemens, an astronomer at Boston University, is the principal investigator on a project using SOFIA to examine Cygnus-X and the effects of magnetic fields on its clouds and cloud filaments.
  • Most modern theories of star formation hint that magnetic fields may be channeling gas flows within molecular clouds toward a central hub, where massive star formation occurs.
  • The SOFIA observations will reveal the magnetic fields in filaments within the clouds, helping to verify the idea that fine, weak magnetic fields can control how stars form.

NASA Discoveries Highlighted at American Astronomical Society Meeting

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Monday, June 13, 2022
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WASHINGTON, June 13, 2022 /PRNewswire/ -- Scientists will discuss new research from NASA missions on topics ranging from exoplanets to citizen science discoveries at the 240th meeting of the American Astronomical Society (AAS).

Key Points: 
  • WASHINGTON, June 13, 2022 /PRNewswire/ -- Scientists will discuss new research from NASA missions on topics ranging from exoplanets to citizen science discoveries at the 240th meeting of the American Astronomical Society (AAS).
  • The meeting began Sunday, June 12, and continues through Thursday, June 16, at the Pasadena Convention Center in Pasadena, California.
  • Agency leaders and researchers will discuss the latest developments in astrophysics during various press conferences, scientific sessions, and town halls.
  • For more information on the meeting, including press registration and the complete meeting schedule, visit:
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