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Full-Text Articles in Physics
Thermophysical Characterization Of Potential Spacecraft Target (101955) 1999 Rq36, Joshua P. Emery Phd, Yanga R. Fernández Phd, Michael S. P. Kelley Phd, Carl Hergenrother Bsc, Julie Ziffer Phd, Dante Lauretta Phd, Michael J. Drake Phd, Humberto Campins Phd
Thermophysical Characterization Of Potential Spacecraft Target (101955) 1999 Rq36, Joshua P. Emery Phd, Yanga R. Fernández Phd, Michael S. P. Kelley Phd, Carl Hergenrother Bsc, Julie Ziffer Phd, Dante Lauretta Phd, Michael J. Drake Phd, Humberto Campins Phd
USM Physics Program
We report on thermal emission measurements of 1999 RQ36 from Spitzer. The derived size is in agreement with radar measurements, and we find a moderately high thermal inertia and homogeneous surface properties.
Nuclear Spectra Of Comet 28p Neujmin 1, Humberto Campins Phd, Julie Ziffer Phd, Javier Licandro, Noemí Pinilla-Alonso Phd, Yanga R. Fernández Phd, Julia De León Phd, Thais Mothé-Diniz Phd, Richard P. Binzel Phd
Nuclear Spectra Of Comet 28p Neujmin 1, Humberto Campins Phd, Julie Ziffer Phd, Javier Licandro, Noemí Pinilla-Alonso Phd, Yanga R. Fernández Phd, Julia De León Phd, Thais Mothé-Diniz Phd, Richard P. Binzel Phd
USM Physics Program
We present visible and near-IR spectra of the nucleus of comet 162P/Siding Spring (also known as 2004 TU12) obtained in 2004 December, while it had no detectable coma. This is the third object observed to have intermittent cometary activity even when relatively close to the Sun. The spectra show no strong features in this wavelength range. This paucity of deep absorptions is common among low-albedo asteroids and the few comet nuclei observed in this spectral region. Marginal spectral structure is observed in the visible spectrum, and beyond 2 μm the flux from the nucleus is dominated by thermal emission. We …
Nuclear Spectra Of Comet 162p/Siding Spring (2004 Tu12), Humberto Campins Phd, Julie Ziffer Phd, Javier Licandro, Noemí Pinilla-Alonso Phd, Yanga R. Fernández Phd, Julia De León Phd, Thais Mothé-Diniz Phd, Richard P. Binzel Phd
Nuclear Spectra Of Comet 162p/Siding Spring (2004 Tu12), Humberto Campins Phd, Julie Ziffer Phd, Javier Licandro, Noemí Pinilla-Alonso Phd, Yanga R. Fernández Phd, Julia De León Phd, Thais Mothé-Diniz Phd, Richard P. Binzel Phd
USM Physics Program
We present visible and near-IR spectra of the nucleus of comet 162P/Siding Spring (also known as 2004 TU12) obtained in 2004 December, while it had no detectable coma. This is the third object observed to have intermittent cometary activity even when relatively close to the Sun. The spectra show no strong features in this wavelength range. This paucity of deep absorptions is common among low-albedo asteroids and the few comet nuclei observed in this spectral region. Marginal spectral structure is observed in the visible spectrum, and beyond 2 μm the flux from the nucleus is dominated by thermal emission. We …
Measuring Boltzmann's Constant Using Video Microscopy Of Brownian Motion, Paul Nakroshis, Matthew Amoroso, Jason Legere, Christian Smith
Measuring Boltzmann's Constant Using Video Microscopy Of Brownian Motion, Paul Nakroshis, Matthew Amoroso, Jason Legere, Christian Smith
USM Physics Program
Boltzmann's constant k was measured by observing the Brownian motion of polystyrene spheres in water. An inexpensive monochrome CCD camera and video card were used to create a video of the spheres' motion. After preprocessing the images, custom routines were used to examine the video and to identify and track the particles from one frame to the next. From the mean squared displacement of the particles versus time, we extracted the value of k from the slope, assuming that the drag force on an individual sphere is well modeled by Stokes' law.