Jonathan Steiner

Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. IV

Marc Kassis, John I. Bailey, Antonin Bouchez, Max Brodheim et autres

Throughout its three decades of operation, the twin 10-meter W. M. Keck Observatory (WMKO) telescopes have continued to maximize their scientific impact to produce transformative discoveries that keep the US observing community on the frontiers of astronomical research. Primary partner technology development …

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High order advanced keck adaptive optics (HAKA): results from lab integration and testing of the high order deformable mirror

Maria Vincent, Charlotte E. Guthery, Scott Lilley, Michael Bottom et autres

Structural pier repair, full-scale implementation of grout replacement on Keck I telescope

Jonathan Steiner, Joel Payne, Jason N. Worden, John S. Hudek et autres

Each of the Keck telescopes incorporates a 3” thick layer of grout which serves as the primary load path between the steel azimuth journal—the telescope’s running surface—and the main body of the reinforced concrete pier. Over the past ~20 years Keck has …

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Investigation and recovery from failed wire ropes at the Keck II Telescope top shutter

Joel Payne, Jonathan Steiner, Jason N. Worden, Ben McCarney et autres

First on-sky results of the HAKA deformable mirror upgrade

Charlotte E. Guthery, Jacob Taylor, Mahawa Cissé, Scott Lilley et autres

Updates on the full-scale development of the fiber delivery subsystem (FIB) of Keck/HISPEC

Nemanja J. Jovanovic, Jeb I. Bailey, Takayuki Kotani, Gregory Sercel et autres

The High-Resolution Infrared Spectrometer for Exoplanet Characterization (HISPEC) will deliver R~100,000 spectroscopy from 0.98–2.5 μm at the Keck Observatory beginning in 2027. Its fiber delivery subsystem (FIB) routes adaptive-optics–corrected science and calibration light over 70 m using single-mode fibers (silica and custom …

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The String Theory Photoverse

Thibaut Coudarchet, Arthur Hebecker, Joerg Jaeckel, Jonathan Steiner

A bstract String theory compactifications come with numerous U(1) factors, implying the presence of many hidden photons in the low-energy EFT. One may call this the “string photoverse”. We argue that, generically, these hidden photons are massless and do not couple to …

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Adaptive optics at W. M. Keck Observatory

Peter Wizinowich, Antonin Bouchez, Eduardo Marín, Sylvain Cetre et autres

The first scientific observations with adaptive optics (AO) at W. M. Keck Observatory (WMKO) began in 1999. Through 2023, over 1200 refereed science papers have been published using data from the WMKO AO systems. The scientific competitiveness of AO at WMKO has …

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Probing SUSY at gravitational wave observatories

Stefan Antusch, Kevin Hinze, Shaikh Saad, Jonathan Steiner

Under the assumption that the recent pulsar timing array evidence for a stochastic gravitational wave (GW) background at nanohertz frequencies is generated by metastable cosmic strings, we analyze the potential of present and future GW observatories for probing the change of particle …

Innovations and advances in instrumentation at the W. M. Keck Observatory, vol. III

Marc Kassis, Carlos Álvarez, Ashley Baker, John I. Bailey et autres

Since the start of science operations in 1993, the twin 10-meter W. M. Keck Observatory (WMKO) telescopes have continued to maximize their scientific impact to produce transformative discoveries that keep the U.S. observing community on the frontiers of astronomical research. Upgraded capabilities …

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Fiber-fed high-resolution infrared spectroscopy at the diffraction limit with Keck-HISPEC and TMT-MODHIS: status update

Dimitri Mawet, Michael P. Fitzgerald, Quinn Konopacky, Nemanja Jovanović et autres

HISPEC (High-resolution Infrared Spectrograph for Exoplanet Characterization) is an infrared (0.98 to 2.46 microns) cross-dispersed, R=100,000 single-mode fiber-fed diffraction-limited echellette spectrograph for the Keck II telescope’s adaptive optics (AO) system. MODHIS (Multi-Objective Diffraction-limited High-resolution Infrared Spectrograph) shares similar specifications as HISPEC while …

Overview and status of the front-end instrument (FEI) Keck/HISPEC, the diffraction-limited y-K band spectrograph for exoplanet characterization

Nemanja Jovanović, Ashley Baker, Mitsuko Roberts, Alberto Franco et autres

The High-Resolution Infrared Spectrograph for Exoplanet Characterization (HISPEC) is a new instrument for the W. M. Keck Observatory that enables R∼100,000 spectroscopy simultaneously across the y, J, H, and K astronomical bands (0.98-2.5 μm). The front-end instrument steers the adaptive optics corrected …