Výsledky vyhledávání - "Cole, Gary A."

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A Decade of Linear and Circular Polarimetry with the POLISH2 Polarimeter

Autor: Wiktorowicz, Sloane J., Słowikowska, Agnieszka, Nofi, Larissa A., Rider, Nicole, Wolfgang, Angie, Hermis, Ninos, Jontof-Hutter, Daniel, Bayless, Amanda J., Cole, Gary M., Crawford, Kirk B., Tsarev, Valeri V., Owens, Michael C., Jaramillo, Ernest G., Maul, Geoffrey A., Graham, James R., Millar-Blanchaer, Maxwell A., Bott, Kimberly, Mauerhan, Jon C.

The POLISH2 optical polarimeter has been in operation at the Lick Observatory 3-m Shane telescope since 2011, and it was commissioned at the Gemini North 8-m in 2016. This instrument primarily targets exoplanets, asteroids, and the Crab pulsar, but i

Externí odkaz: http://arxiv.org/abs/2211.09279

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Direct Measurements of Giant Star Effective Temperatures and Linear Radii: Calibration Against Spectral Types and V-K Color

Autor: van Belle, Gerard T., von Braun, Kaspar, Ciardi, David R., Pilyavsky, Genady, Buckingham, Ryan S., Boden, Andrew F., Clark, Catherine A., Hartman, Zachary, van Belle, Gerald, Bucknew, William, Cole, Gary

We calculate directly determined values for effective temperature ($T_{\rm EFF}$) and radius ($R$) for 191 giant stars based upon high resolution angular size measurements from optical interferometry at the Palomar Testbed Interferometer. Narrow- to

Externí odkaz: http://arxiv.org/abs/2107.09205

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Standard-Model Extension Constraints on Lorentz and CPT Violation From Optical Polarimetry of Active Galactic Nuclei

Autor: Friedman, Andrew S., Leon, David, Gerasimov, Roman, Crowley, Kevin D., Broudy, Isaac, Melkani, Yash, Stevens, Walker, Johnson, Delwin, Teply, Grant, Tytler, David, Keating, Brian G., Cole, Gary M.

Vacuum birefringence from Lorentz and CPT violation in the Standard-Model Extension can be constrained using ground-based optical polarimetry of extragalactic sources. We describe results from a pilot program with an automated system that can perform

Externí odkaz: http://arxiv.org/abs/1906.07301

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Constraints on Lorentz Invariance and CPT Violation using Optical Photometry and Polarimetry of Active Galaxies BL Lacertae and S5 B0716+714

Autor: Friedman, Andrew S., Leon, David, Crowley, Kevin D., Johnson, Delwin, Teply, Grant, Tytler, David, Keating, Brian G., Cole, Gary M.

Publikováno v: Phys. Rev. D 99, 035045 (2019)

Various quantum gravity approaches that extend beyond the standard model predict Lorentz Invariance and Charge-Parity-Time Violation at energies approaching the Planck scale. These models frequently predict a wavelength dependent speed of light, whic

Externí odkaz: http://arxiv.org/abs/1809.08356

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