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Credit: Lo Que Pasa, The University of Arizona

Don McCarthy Interview in "Lo Que Pasa": Why He Chose the UA

 

"Lo Que Pasa" recently interviewed University Distinguished Outreach Professor, Dr Don McCarthy of Steward Observatory. This series of interviews asked recently honored professors why they're at the UA. There's a four-minute video HERE. Don is well known for more than two decades of running Astronomy Camp using local telescopes (LINK), and for his presence in the introductory (Gen Ed) classroom and young astronomy majors classroom, and as a faculty fellow in Coconino Hall.

 

Steward alumni Matt Kenworthy (postdoc and instrument scientist, now at Leiden Observatory), and Eric Mamajek (PhD 2004, now at Rochester) have found observational evidence for the existence of a giant ring system orbiting an unseen brown dwarf star or exoplanet orbiting the star "J1407" (its proper, formal name is 1SWASP J140747.93-394542.6). The evidence comes from an attempt to model the complex changes in brightness of an eclipse lasting 56 days. If this companion/planet and its ring system were placed at Saturn, the rings would be visible to the naked eye here on Earth, and would be many times larger than our full moon. A best estimate for the mass of the rings is approximately 1 Earth mass, about 100000 times more massive than the rings of the planet Saturn. J1407 is a very young star, and this observation teaches us how the gas and dust out of which stars form change with time and as planets or moons form. The photo is an artist's rendering against a venerable Dutch telescope. The CNN article can be found HERE.
The actual scientific preprint can be found HERE.

Photo Credit: Matt Kenworthy

In the NY Times' extensive discussion of the New England Patriots and Deflategate, one of the newest articles has extensive quotations from Steward PhD alumnus Charles Liu, now on the faculty at the College of Staten Island and an Associate at Hayden Planetarium. The article can be found HERE.

A couple of pithy quotations from the article follow:

"... “Just because you’re not a scientist does not mean you can’t know what to do,” Liu said. “It’s kind of like saying, Well, I see somebody about to burn down your house, but since I’m not a firefighter, I don’t know whether I should stop them or not.”

...“If you let out 2 p.s.i. from the ball, it is as if you removed 400 pounds of force pushing outward from the football,” Liu said. “If you let out 1.5 p.s.i. from the ball, it’s as if you removed 300 pounds of force pushing outward from the football.”"

"Liu mentioned Muhammad Wilkerson, a 6-foot-4-inch, 315-pound defensive lineman for the Jets, to illustrate the point. If Wilkerson were to stand on a ball, the leather would bulge out on the ball’s sides, growing taut, and would be much harder to grip. Take Wilkerson off the ball, and it would become easier to grip. “That is what letting 1.5 or 2 p.s.i. out of the ball means,” Liu said. (I tried the experiment in the office with a basketball, with an editor gripping the sides of the ball. He agreed that it was easier to hold on to once my 220 pounds had hopped off.)..."

Finally, the Boston Globe published a Boston-based view of the same HERE.

Bill Nye the Science Guy weighed in HERE.

 

The tenth UA College of Science Lecture Series is about to begin. This year the topic is "Life in the Universe" and involves Stewardites Chris Impey and Laird Close, LPL-ites Tim Swindle and Dante Lauretta, Vatican-ite Guy Consolmagno, and Evolutionary Biology Professors Anna Dornhaus and Brian Enquist. All lectures are at 7pm, beginning Jan 26, in Centennial Hall.

For more information, look HERE and HERE. Watch the Kepler Orrery (confirmed exo-solar planets orbiting their stars to Wagner) HERE. While this series is happening, the Steward Monday Public Evening series found HERE is in abeyance.

A view of the Coma Cluster from SDSS public imaging data. Retrieved from SDSS finding chart tool, http://skyserver.sdss.org/public/en/tools/chart/chartinfo.aspx, courtesy SDSS.

Data Release 12 of SDSS Data, with some Steward Contributions

Data Release 12 of SDSS has just been made public in time for the Jan 2015 AAS meeting. Daniel Stolte of UA Relations/Communications, and Jordan Raddick of SDSS, describe the data release and focus on some of the UA contributions to SDSS DR12 and UA science being done with SDSS. Featured scientists include former Steward Professor Daniel Eisenstein, Steward Regents' Professors Xiaohui Fan and Marcia Rieke, and Assistant Astronomer Ian McGreer. The UA News press release can be found HERE. Embedded in the press release is a 4-minute movie. 

 

4/09/15: SO/NOAO Joint Colloquium Series: Bhuvnesh Jain, University of Pennsylvania

Date: 
Thursday, April 9, 2015 - 4:00pm to 5:00pm
Room: 

Bhuvnesh Jain, University of Pennsylvania

Lensing and Large-Scale Structure in the Dark Energy Survey

With early data from the Dark Energy Survey we have obtained cosmological measurements using weak lensing and galaxy clustering. These include wide field mass maps and comparisons to the distribution of galaxies and clusters. I will describe the tests and validation of the data and preliminary conclusions from this analysis. I will also describe new measurements of cosmic voids.

2/15/15: SO/NOAO Joint Colloquium Series: Ryan Foley, University of Illinois

Date: 
Thursday, February 12, 2015 - 4:00pm to 5:00pm
Room: 

Ryan Foley, University of Illinois

The Most Common "Peculiar" Supernova

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