4 August 2016 iLocater: a diffraction-limited Doppler spectrometer for the Large Binocular Telescope
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Abstract
We are developing a stable and precise spectrograph for the Large Binocular Telescope (LBT) named “iLocater.” The instrument comprises three principal components: a cross-dispersed echelle spectrograph that operates in the YJ-bands (0.97-1.30 μm), a fiber-injection acquisition camera system, and a wavelength calibration unit. iLocater will deliver high spectral resolution (R~150,000-240,000) measurements that permit novel studies of stellar and substellar objects in the solar neighborhood including extrasolar planets. Unlike previous planet-finding instruments, which are seeing-limited, iLocater operates at the diffraction limit and uses single mode fibers to eliminate the effects of modal noise entirely. By receiving starlight from two 8.4m diameter telescopes that each use “extreme” adaptive optics (AO), iLocater shows promise to overcome the limitations that prevent existing instruments from generating sub-meter-per-second radial velocity (RV) precision. Although optimized for the characterization of low-mass planets using the Doppler technique, iLocater will also advance areas of research that involve crowded fields, line-blanketing, and weak absorption lines.
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Justin R. Crepp, Justin R. Crepp, Jonathan Crass, Jonathan Crass, David King, David King, Andrew Bechter, Andrew Bechter, Eric Bechter, Eric Bechter, Ryan Ketterer, Ryan Ketterer, Robert Reynolds, Robert Reynolds, Philip Hinz, Philip Hinz, Derek Kopon, Derek Kopon, David Cavalieri, David Cavalieri, Louis Fantano, Louis Fantano, Corina Koca, Corina Koca, Eleanya Onuma, Eleanya Onuma, Karl Stapelfeldt, Karl Stapelfeldt, Joseph Thomes, Joseph Thomes, Sheila Wall, Sheila Wall, Steven Macenka, Steven Macenka, James McGuire, James McGuire, Ronald Korniski, Ronald Korniski, Leonard Zugby, Leonard Zugby, Joshua Eisner, Joshua Eisner, B Scott Gaudi, B Scott Gaudi, Fred Hearty, Fred Hearty, Kaitlin Kratter, Kaitlin Kratter, Marc Kuchner, Marc Kuchner, Giusi Micela, Giusi Micela, Matthew Nelson, Matthew Nelson, Isabella Pagano, Isabella Pagano, Andreas Quirrenbach, Andreas Quirrenbach, Christian Schwab, Christian Schwab, Michael Skrutskie, Michael Skrutskie, Alessandro Sozzetti, Alessandro Sozzetti, Charles Woodward, Charles Woodward, Bo Zhao, Bo Zhao, "iLocater: a diffraction-limited Doppler spectrometer for the Large Binocular Telescope", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990819 (4 August 2016); doi: 10.1117/12.2233135; https://doi.org/10.1117/12.2233135
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