News from the Department (2025)

March 2025

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• Gerbs Bauer reflected on the increasing and then decreasing probability of Earth being hit by a space rock in one of last week's MarylandToday.
  
  

February 2025

• Former grad student Carrie Holt (PhD 2023, now at Las Cumbres Observatory) chats on the AAS YouTube channel about her paper "Brightness Behavior of Distant Oort Cloud Comets and where we can go from here given the published article. Co-authors include alum Matthew Knight, PhD 2008, and faculty Michael Kelley, Quanzhi Ye, and Derek Richardson.
  
  
• Congratulations to postdoc Sean Terry, the lead author on A Candidate High-velocity Exoplanet System in the Galactic Bulge that includes co-authors David Bennett and Arpana Bhattacharya, about a low-mass star dragging its planetary system through space at about 540 kilometers per second. The news made it to Thursday's MarylandToday, with a vague writing credit that may well include some of our Department members!
  
  
• Dennis Wellnitz is a member of the team hoping to get a new and improved laser retroflector on the Moon. MarylandToday had a good story about the project and why it will be a step forward. Laser ranging to the Moon started at UMD.
  
  
• The NY Times picked up the story about asteroid 2024 YR4, which rather suddenly shifted from one list to another, emerging as a possible future Earth impactor.. This kept the Small Bodies Node busy getting the news out. It's about 50m in size, which would be very bad news if it hit a city. If history is a guide, though, the probability of an impact will decrease from the current value 1% as the orbit is refined.
  
  
• Very cool: not only do the samples OSIRIS-REX returned from Bennu have amino acids, but they have a near-equal mix of handedness (handedness is a big deal in working out the origin of life on Earth). The paper, Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu includes several co-authors who are CRESST faculty.
  
  
• And coming up Monday, Feb. 10, Zuzanna Kocjan will be joining a raft of ambassadors and other diplomatic luminaries on the "Breaking the Ceiling!" panel at the International Week of Women and Girls in Science: Global Perspectives in Science Diplomacy event organized by the Johns Hopkins Science Diplomacy Hub in collaboration with the Embassy of Finland, Embassy of Norway, Embassy of Poland, and Embassy of the United Arab Emirates. Way to go, Zuzanna!
  
  
• Cold fronts in galaxy clusters I: A case for the large-scale global eigen modes in unmagnetized and weakly magnetized cluster core, a paper by P. Pal Choudhury & C.S.Reynolds, is now in press with MNRAS. Congratulations, Chris!
  
  

January 2025

• Gerry Share led a paper titled Solar Gamma-Ray Evidence for a Distinct Population of > 1 MeV Flare-Accelerated Electrons has been accepted for publication in ApJ. They are able to separate power-law and modified power-law energy components to distinguish gamma-ray production in the corona and at solar flare footpoints. Congratulations, Gerry! (He'll also be giving a seminar 7 Apr.)
  
  
• Astronomy/Geology Professor Jessica Sunshine is now another step closer to investigating the Gruithuisen Domes, one of the most enigmatic formations on the moon. NASA recently selected a commercial partner to deliver the Lunar Vulkan Imaging and Spectroscopy Explorer (Lunar-VISE) mission payload to the Domes. The project aims to investigate the Domes' inexplicable origins-and whether the moon's surface contains potential resources for future lunar exploration. Read more in the CMNS release.
  
  
• Congratulations to Johnny Seebeck for his Graduate Honorable Mention in the Chambliss Astronomy Achievement Student Awards! More to come.
  
  
• Given the location, no surprise, but there were familiar faces from the Department everywhere at AAS last week! Starting with the Grad student and REU fair, where lines of interested people, including quite a number of grad school applicants, kept Keaton, Keyi, Kylie, Marshall, Charles, Lee, Chris, and me hopping. (I hope I didn't forget anyone, let me know if so.)
  Kicking off on Monday, plenty of talks. Next time we need to make a list in advance and distribute it -- I could find many more with a desktop than with the mobile version of the program, so I missed a lot of our talks.
  Posters galore, too, of course, all in the electronic iPoster format. These got mixed reviews. Not only the temptation, but the practice, was to have much of the text (and sometimes way, way, way, too much text).expand on a click, so it wasn't easy to read the poster without interacting with it. That effectively limited the number of people who could see a poster at any one time, unless they were a group. On the plus side, one could show animations and details well beyond the scope of a paper poster.
  Speaking of posters, congratulations go to Johnny Seebeck for his Graduate Honorable Mention in the Chambliss Astronomy Achievement Student Awards! More on this when the AAS updates its web page, but congratulate Johnny now!
  The exhibit and poster area was a great place for bumping into Maryland colleagues, including quite a number of our undergrad students in addition to our grad students, faculty, and alums. Not to mention colleagues we know from other institutions, NASA, NSF, Lowell, NRAO, AUI, Springer, and more.
  AXIS and PRIMA got a lot of attention, and not only at the NASA Town Hall. AXIS had a booth, generally quite crowded, and PRIMA was represented with a table in the IPAC. Both had well-attended splinter sessions, and Alex Pope devoted her plenary talk to the importance of the far-IR in support of PRIMA. Several PRIMA talks emphasized possible synergies between the two missions.
  And drama! The spacewalk to fix the light leaks in the NICER instrument took place on Thursday. Elizabeth Ferrara was completely wrapped up in getting things set up for the astronauts, and had to leave the information table to Isiah while she supported the repair on Thursday. The worst of the leaks came from something (probably stray ice fragments) scraping off a metal film blocking layer in front of the detectors, and the light blinded them during ISSS days. So, nighttime only observing at X-rays, a bit novel. Elizabeth and Isiah had a nifty set of demonstrations to show NICER and the repair equipment. By Thursday noon Isiah was the center of attention, with quite a crowd at his table. Whew!
  I'm missing many highlights, I'm sure (but do send them in for a subsequent update), but I'll close with one very popular feature of the meeting, especially but not exclusively for the younger crowd -- a photo backdrop. Even with only a fraction of our students collecting at the right time, Maryland took advantage of it, of course!