Browsing by Author "Glenday, Alexander"

Now showing items 1-6 of 6

    • An astro-comb calibrated solar telescope to search for the radial velocity signature of Venus 

      Phillips, David F.; Glenday, Alex; Dumusque, Xavier; Buchschacher, Nicolas; Cameron, Andrew Collier; Cecconi, Massimo; Charbonneau, David; Cosentino, Rosario; Ghedina, Adriano; Haywood, Raphaelle D.; Latham, David Winslow; Li, Chih-Hao; Lodi, Marcello; Lovis, Christophe; Molinari, Emilio; Pepe, Francesco; Sasselov, Dimitar D.; Szentgyorgyi, Andrew H.; Udry, Stephane; Walsworth, Ronald Lee (2016)
      We recently demonstrated sub-m/s sensitivity in measuring the radial velocity (RV) between the Earth and Sun using a simple solar telescope feeding the HARPS-N spectrograph at the Italian National Telescope, which is ...

    • Calibration of an Astrophysical Spectrograph Below 1 m/s Using a Laser Frequency Comb 

      Phillips, David Forrest; Glenday, Alexander G.; Li, Chih-Hao; Cramer, Claire; Furesz, Gabor; Chang, Guoqing; Benedick, Andrew J.; Chen, Li-Jin; Szentgyorgyi, Andrew H.; Walsworth, Ronald L. (Optical Society of America, 2012)
      We deployed two wavelength calibrators based on laser frequency combs (“astro-combs”) at an astronomical telescope. One astro- comb operated over a 100 nm band in the deep red (∼ 800 nm) and a second operated over a 20 nm ...

    • Conjugate Fabry–Perot Cavity Pair for Improved Astro-Comb Accuracy 

      Li, Chih-Hao; Guoqing, Chang; Glenday, Alexander G.; Langellier, Nicholas Ryan; Zibrov, Alexander S; Phillips, David Forrest; Kärtner, Franz X.; Szentgyorgyi, Andrew H.; Walsworth, Ronald L. (Optical Society of America, 2012)
      We propose a new astro-comb mode-filtering scheme composed of two Fabry–Perot cavities (coined “conjugate Fabry–Perot cavity pair”). Simulations indicate that this new filtering scheme makes the accuracy of astro-comb ...

    • HARPS-N Observes the Sun as a Star 

      Dumusque, Xavier; Glenday, Alex; Phillips, David F.; Buchschacher, Nicolas; Cameron, Andrew Collier; Cecconi, Massimo; Charbonneau, David; Cosentino, Rosario; Ghedina, Adriano; Latham, David Winslow; Li, Chih-Hao; Lodi, Marcello; Lovis, Christophe; Molinari, Emilio; Pepe, Francesco; Udry, Stéphane; Sasselov, Dimitar D.; Szentgyorgyi, Andrew H.; Walsworth, Ronald Lee (IOP Publishing, 2015)
      Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscopy. Such stellar noise is poorly ...

    • In-Situ Determination of Astro-Comb Calibrator Lines to Better Than 10 cm \(s^{-1}\) 

      Li, Chih-Hao; Glenday, Alexander Graham; Benedick, Andrew J.; Chang, Guoqing; Chen, Li-Jin; Cramer, Claire; Fendel, Peter; Furesz, Gabor; Kärtner, Franz X.; Korzennik, Sylvain G.; Phillips, David F.; Sasselov, Dimitar D.; Szentgyorgyi, Andrew H.; Walsworth, Ronald Lee (Optical Society of America (OSA), 2010)
      Improved wavelength calibrators for high-resolution astrophysical spectrographs will be essential for precision radial velocity (RV) detection of Earth-like exoplanets and direct observation of cosmological deceleration. ...

    • Visible Wavelength Astro-Comb 

      Benedick, Andrew J.; Chang, Guoqing; Birge, Jonathan R.; Chen, Li-Jin; Glenday, Alexander Graham; Li, Chih-Hao; Phillips, David F.; Szentgyorgyi, Andrew H.; Korzennik, Sylvain G.; Furesz, Gabor; Walsworth, Ronald Lee; Kärtner, Franz X. (Optical Society of America (OSA), 2010)
      We demonstrate a tunable laser frequency comb operating near 420 nm with mode spacing of 20-50 GHz, usable bandwidth of 15 nm and output power per line of ~20 nW. Using the TRES spectrograph at the Fred Lawrence Whipple ...