This cause of exploration and discovery is not an option we choose.
It is a desire written in the human heart. We are that part of creation
which seeks to understand all creation. We find the best among us, send
them forth into unmapped darkness, and pray they will return. They go in
peace for all mankind, and all mankind is in their debt.
President G. W. Bush, 2/2003 Columbia space shuttle crew memorial
At the beginning of 2018, the US Defense Department maintained an estimated stockpile of 4,000 nuclear warheads for delivery by more than 800 ballistic missiles and aircraft.
Most of the warheads in the stockpile are not deployed, but rather stored for potential upload onto missiles and aircraft if so decided. Many are destined for retirement. We estimate that approximately 1,800 warheads are currently deployed, of which roughly 1,650 strategic warheads are deployed on ballistic missiles and at bomber bases in the United States. Another 150 tactical bombs are deployed in Europe. The remaining warheads – approximately 2,200, or 55 percent of the total – are in storage as a so-called hedge against technical or geopolitical surprises. Several hundred of those warheads are scheduled to be retired before 2030.
In addition to the warheads in the Defense Department stockpile, approximately 2,550 retired but still intact warheads are stored under custody of the Energy Department and are awaiting dismantlement, for a total US inventory of roughly 6,550 warheads.
Bulletin of Atomic Scientists (https://doi.org/10.1080/00963402.2018.1438219)
Burch Field Seminar Students
atop C. Pachon, Chile outside SOAR Telescope
Eclipse Aug. 2017 through 400 mm lens from 9800 ft altitude near Alta WY
Here are some of my professional and academic interests
I'm preparing instrumentation and executing science programs for the
SOAR telescope remotely
as Project Scientist in Tucson, I once spent 4.5 years helping to design.
My students have learned ZEMAX and SolidWorks 3D CAD/CAM design tools,
printed parts from those directly on our lab's large volume 3D printer,
programmed servo motors, and designed/built surface-mount circuit boards,
among other technical activities.
We're exploring galaxy structure and dynamical evolution using integral-field
spectrometers to analyze and model gas and stellar velocity fields, and
We've worked on numerical simulations of starburst outflows as
part of a NASA-funded Herschel space Observatory program,
and observations and models of Galactic (Herbig-Haro) and galaxy (superwind) outflows.
I'm primarily working on diverse parts of the exciting
Survey, which is using
photonics instrumentation to map
a dozen galaxies at once in a total sample of 3200
across the optical spectrum and over
the one-degree field of view of the
3.9m Australian Astronomical Telescope (AAT).
We are mapping galaxies both in the field and in 8 clusters.
Here's an example of some of our QuickLook maps.
My interface provides an
overview of the SAMI data release 2 on many of these galaxies..
More information is extracted from deeper analysis, including stellar
population mix, stellar and dynamical
M/L, and chemical abundances. SAMI spans the inner
15-arcsec diameter of galaxies, the sample is at z = 0.050+-0.025
My initial focus
has been on gas kinematics/dynamics of bar/oval distortions, some
examples of field galaxies and their derived axisymmetric
But I'm working hard to learn much about stellar populations
Here is a colloquium I presented on SAMI at the South African Astronomical Observatory (11/17/16).
I can be reached at
My public PGP decryption signature
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.10 (MingW32)
-----END PGP PUBLIC KEY BLOCK-----