Carbon nanotube templated microfabrication (CNT-M) was used to create structured materials with control over length scales from 10 nm to over 100 microns. The electron micrographs shows control over three dimensional microscale features that is possible with CNT-M (as seen in top left image). Nanoscale porosity is also controlled (seen in top right image) and when coupled with microscale patterning results in the fabrication of structures (bottom left) for high performance chemical separations (bottom right).
A recent article that appeared in the Astronomical Journal (Joner and Hintz, 2015, AJ, 150, 204), established a new photometric system based on a pair of filter functions used to measure the strength of the H-alpha line in stars. The paper presented H-alpha and H-beta indices for 136 field and cluster stars that were observed with the 1.2-meter telescope at the Dominion Astrophysical Observatory during an 11 year period. The indices were determined from spectro-photometry of the thousands of spectra exposures. The figure to the left shows a relation for normal main sequence stars between the new H-alpha index and the more than 60 year old H-beta index. Color-color plots like this one are useful in surveys to detect objects of astrophysical interest that display emission features of various strengths. These extreme objects are easily seen in a color-color plot. One High Mass X-ray Binary recently observed for a followup study was located at (0.87,1.87) in the color-color plot.
The figure shown to the left is from a recent publication in the Astronomical Journal (Oberst, Thomas E., et al., 2017, AJ, 153, 97) that confirms the discovery of a highly irradiated, ultra-short period hot Jupiter in orbit around a distant star. The newly discovered planet has been designated as KELT–16b. The long time series run in the left hand panel that is labeled "Pratt" is from a team of students led by Dr. Denise Stephens using the BYU campus Orson Pratt Observatory. The four multi-color data sets that follow were secured a couple of days later by students under the direction of Dr. Michael Joner at the BYU West Mountain Observatory. These and the other data presented in the paper confirm the sub-stellar mass and other properties of KELT-16b.
This image was secured just after the end of evening twilight on a clear April night from the West Mountain Observatory. The view is looking west past the domes housing the two smaller research telescopes at the observatory. The thin crescent Moon is also illuminated by reflected light from the Earth that is known as earthshine. Higher in the sky, the bright 'star' is actually the planet Venus. In between the two, the 'V' shaped group of stars in the constellation of Taurus is in reality the nearby open cluster known as the Hyades. Photo credit: Dr. Michael D. Joner
This is a photo secured by Dr. Michael Joner in Riverton, Wyoming of the great eclipse of 2017. The image shows the inner corona along with several solar prominences seen near mid-totality. This is the first solar eclipse visible from the continental United States in 38 years. America's next opportunity will be on April 8, 2024 for viewers between Texas and Maine.
17 Jun, Today
18 Jun, Tuesday
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24 Jun, Monday
Karine Chesnel, Dalton Griner, Dallin Smith, Yanping Cai, Matea Trevino, and Brittni Pratt et al. recently published an article titled "Unraveling Nanoscale Magnetic Ordering in Fe3O4 Nanoparticle Assemblies via X-rays" in Magnetochemistry. Click on the image above to read it.
Milky Way over Pyramid of the Feathered Serpent : To see the feathered serpent descend the Mayan pyramid requires exquisite timing. You must visit El Castillo -- in Mexico's Yucatán Peninsula -- near an equinox....
This photograph and Description come from NASA's Astronomy Picture of the Day web site.