May 10th: Active Asteroids

By on May 10, 2019 in
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Podcaster: Host : Fraser Cain ; Guest : Dr. Henry Hsieh & Dr. Kimberly Cartier

Title: Weekly Space Hangout : Guests: Dr. Henry Hsieh Discusses Active Asteroids

Link: Cosmoquest: http://cosmoquest.org

You can watch the video in: https://www.youtube.com/watch?v=j2ot51hs75w

Description:  Today’s story:

Dr. Henry Hsieh’s primary interest is investigating the nature of volatile material in the asteroid belt and what it can tell us about the solar system’s formation and the origin of terrestrial volatiles. His primary work in this area has been in the study of active asteroids, and more specifically, main-belt comets. Active asteroids are a newly-recognized class of small bodies with asteroid-like orbits (mostly, but not all, within the main asteroid belt) that exhibit comet-like activity that has been attributed to a range of mechanisms for different objects, from sublimation to impacts or rotational disruption. Main-belt comets are the subset of active asteroids for which we believe sublimation to be the primary driver of activity, i.e., as in “classical” comets. Along with his collaborators, he investigates these objects using targeted imaging and spectroscopic observations to physically characterize their nuclei and activity, mining of current and archival survey data to discover more such objects, dust modeling to understand the dust emission behavior for individual objects, dynamical analyses to investigate the long-term dynamical behavior of these objects and search for associations with asteroid families, and thermal modeling to better understand the evolution of the volatile content and active behavior of main-belt comets over time.

  • Confirming a 2,067 year-old nova observation.
  • The Hubble Legacy Survey.
  • 2024. Moon. Is it gonna happen? (Spoiler alert: No.)
  • Gold from neutron stars!
  • Haumea’s ring.

Host: Fraser Cain

Special Guests: Dr. Hsieh, of the Planetary Science Institute, who received his PhD in Astronomy in 2007 from the University of Hawaii. Subsequently, he was a Postdoctoral Fellow at Queen’s University Belfast in Northern Ireland and a Hubble Fellow back at the University of Hawaii. Before joining PSI in 2014, was an Assistant Research Fellow (faculty) at the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) in Taipei, Taiwan.

Guests:

Dr. Kimberly Cartier ( http://KimberlyCartier.org & @AstroKimCartier )

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End of podcast:

365 Days of Astronomy
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The 365 Days of Astronomy Podcast is produced by Planetary Science Institute. Audio post-production by Richard Drumm. Bandwidth donated by libsyn.com and wizzard media. You may reproduce and distribute this audio for non-commercial purposes. Please consider supporting the podcast with a few dollars (or Euros!). Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org. This year we will celebrates the Year of Everyday Astronomers as we embrace Amateur Astronomer contributions and the importance of citizen science. Join us and share your story. Until tomorrow! Goodbye!

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