A harsh test of far-field scrambling with the habitable-zone planet finder and the hobby–eberly telescope
Por:
Kanodia S., Halverson S., Ninan J.P., Mahadevan S., Stefansson G., Roy A., Ramsey L.W., Bender C.F., Janowiecki S., Cochran W.D., Diddams S.A., Drory N., Endl M., Ford E.B., Hearty F., Metcalf A.J., Monson A., Robertson P., Schwab C., Terrien R.C., Wright J.T.
Publicada:
1 ene 2021
Resumen:
The Habitable-zone Planet Finder (HPF) is a fiber-fed precise radial velocity (RV) spectrograph at the 10 m Hobby–Eberly Telescope (HET). Due to its fixed-altitude design, the HET pupil changes appreciably across a track, leading to significant changes of the fiber far-field illumination. HPF’s fiber scrambler is designed to suppress the impact of these illumination changes on the RVs—but the residual impact on the RV measurements has yet to be probed on-sky. We use GJ 411, a bright early type (M2) M dwarf to probe the effects of far-field input trends due to these pupil variations on HPF RVs. These large changes (~2x) in the pupil area and centroid present a harsh test of HPF’s far-field scrambling. Our results show that the RVs are effectively decoupled from these extreme far-field input changes due to pupil centroid offsets, attesting to the effectiveness of the scrambler design. This experiment allows us to test the impact of these changes with large pupil variation on-sky, something we would not easily be able to do at a conventional optical telescope. While the pupil and illumination changes expected at these other telescopes are small, scaling from our results enables us to estimate and bound these effects, and show that they are controllable even for the new and next generation of RV instruments in their quest to beat down instrumental noise sources toward the goal of a few cm s-1. © 2021. The American Astronomical Society. All rights reserved.
Filiaciones:
Kanodia S.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Penn State Extraterrestrial Intelligence Center, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Halverson S.:
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, United States
Ninan J.P.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Mahadevan S.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Stefansson G.:
Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08540, United States
Roy A.:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, United States
Ramsey L.W.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Bender C.F.:
Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, United States
Janowiecki S.:
University of Texas at Austin, McDonald ObservatoryTX 79734, United States
Cochran W.D.:
McDonald Observatory, Department of Astronomy, University of Texas at Austin, Austin, TX 78712, United States
Center for Planetary Systems Habitability, University of Texas at Austin, Austin, TX 78712, United States
Diddams S.A.:
Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, United States
Department of Physics, University of Colorado, 2000 Colorado Avenue, Boulder, CO 80309, United States
Drory N.:
University of Texas at Austin, McDonald ObservatoryTX 79734, United States
Endl M.:
McDonald Observatory, Department of Astronomy, University of Texas at Austin, Austin, TX 78712, United States
Center for Planetary Systems Habitability, University of Texas at Austin, Austin, TX 78712, United States
Ford E.B.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Institute for Computational and Data Sciences, Pennsylvania State University, University Park, PA 16803, United States
Center for Astrostatistics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16803, United States
Institute for Advanced Study, 1 Einstein Drive, Princeton, NJ 08540, United States
Hearty F.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Metcalf A.J.:
Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, United States
Department of Physics, University of Colorado, 2000 Colorado Avenue, Boulder, CO 80309, United States
Space Vehicles Directorate, Air Force Research Laboratory, 3550 Aberdeen Avenue SE, Kirtland AFB, NM 87117, United States
Monson A.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Robertson P.:
Department of Physics and Astronomy, University of California, Irvine, Irvine, CA 92697, United States
Schwab C.:
Department of Physics and Astronomy, Macquarie University, Balaclava Road, North Ryde, NSW 2109, Australia
Terrien R.C.:
Carleton College, One North College Street, Northfield, MN 55057, United States
Wright J.T.:
Department of Astronomy & Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Center for Exoplanets and Habitable Worlds, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
Penn State Extraterrestrial Intelligence Center, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, United States
|