Status update of LLAMAS: a wide field-of-view visible passband IFU for the 6.5m Magellan telescopes

Fürész, Gábor; Simcoe, Robert A.; Egan, Mark; Malonis, Andrew; Masterson, Rebecca; Brown, Joshua; Cappiello, Gregory; Chesbrough, Christian; Clark, Kristin; Coppeta, D. A.; Frostig, Danielle; Gabutti, Michelle; Halverson, Samuel; Hinrichsen, Erik; Kahn, Sabrina; Lambert, Madeline M.; Lourie, Nathan P.; Piotrowski, John; Semisch, Christopher

doi:10.1117/12.2562803

Cited by 3 publications

(1 citation statement)

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“…Such an illumination pattern can be easily achieved in laboratory setup via a compact optical fiber grid. 54 This simulation study also hints at the capability of the PMADM in aberration corrections beyond focus control. Figure 14(b) shows the illumination pattern and the temperature distribution due to 120 mW heating at the P-layer of the PMADM.…”

Section: Simulation Of Higher Order Controlmentioning

confidence: 63%

Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

et al. 2021

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Deformable mirrors (DMs) have wide applications ranging from astronomical imaging to laser communications and vision science. However, they often require bulky multichannel cables for delivering high power to their drive actuators. A low-powered DM, which is driven in a contactless fashion, could provide a possible alternative to this problem. We present a photomagnetically actuated deformable mirror (PMADM) concept, which is actuated in a contactless fashion by a permanent magnet and low-power laser heating source. We present the laboratory demonstration of prototype optical surface quality, magnetic control of focus, and COMSOL simulations of its precise photocontrol. The PMADM prototype is made of a magnetic composite (polydimethylsiloxane + ferromagnetic CrO 2 ) and an optical-quality substrate layer and is 30.48 mm × 30.48 mm × 175 μm in dimension with an optical pupil diameter of 8 mm. It deforms to 5.76 μm when subjected to a 0.12-T magnetic flux density and relaxes to 3.76 μm when illuminated by a 50-mW laser. A maximum stroke of 8.78 μm before failure is also estimated considering a 3× safety factor. Our work also includes simulation of astigmatism generation with the PMADM, a first step in demonstrating control of higher order modes. A fully developed PMADM may have potential application for wavefront corrections in vacuum and space environments.

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Section: Simulation Of Higher Order Controlmentioning

confidence: 63%

Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

et al. 2021

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The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe

Liu,

Johnson,

et al. 2023

Monthly Notices of the Royal Astronomical Society

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We present the first comprehensive study of a giant, ≈70 kpc-scale nebula around a radio-quiet quasar at z < 1. The analysis is based on deep integral field spectroscopy with Multi-Unit Spectroscopic Explorer of the field of HE 0238−1904, a luminous quasar at z = 0.6282. The nebula emits strongly in [O ii], $\rm H \beta$, and [O iii], and the quasar resides in an unusually overdense environment for a radio-quiet system. The environment likely consists of two groups which may be merging, and in total have an estimated dynamical mass of Mdyn ≈ 4 × 1013 to 1014 M⊙. The nebula exhibits largely quiescent kinematics and irregular morphology. The nebula may arise primarily through interaction-related stripping of circumgalactic and interstellar medium (CGM/ISM) of group members, with some potential contributions from quasar outflows. The simultaneous presence of the giant nebula and a radio-quiet quasar in a rich environment suggests a correlation between such circum-quasar nebulae and environmental effects. This possibility can be tested with larger samples. The upper limits on the electron number density implied by the [O ii] doublet ratio range from $\log (n_{\rm e, [O\,{\small II}]} /\mathrm{cm}^{-3})<1.2$ to 2.8. However, assuming a constant quasar luminosity and negligible projection effects, the densities implied from the measured line ratios between different ions (e.g. [O ii], [O iii], and [Ne v]) and photoionization simulations are often 10−400 times larger. This large discrepancy can be explained by quasar variability on a time-scale of ≈104−105 yr.

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A Model-based Approach for Verification of the Large Lenslet Array Magellan Spectrograph (LLAMAS)

Stenzel,

Masterson,

Simcoe

2024

2024 IEEE Aerospace Conference

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Status update of LLAMAS: a wide field-of-view visible passband IFU for the 6.5m Magellan telescopes

Cited by 3 publications

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Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe

A Model-based Approach for Verification of the Large Lenslet Array Magellan Spectrograph (LLAMAS)

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Status update of LLAMAS: a wide field-of-view visible passband IFU for the 6.5m Magellan telescopes

Cited by 3 publications

References 0 publications

Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

Demonstration of magnetic and light-controlled actuation of a photomagnetically actuated deformable mirror for wavefront control

The first comprehensive study of a giant nebula around a radio-quiet quasar in the z &lt; 1 Universe

A Model-based Approach for Verification of the Large Lenslet Array Magellan Spectrograph (LLAMAS)

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The first comprehensive study of a giant nebula around a radio-quiet quasar in the z < 1 Universe