The University of Tokyo Atacama Observatory 6.5m telescope: update of the Near-Infrared Echelle Spectrograph NICE as the first light instrument

Abstract We present updated radial-velocity (RV) analyses of the AU Mic system. AU Mic is a young (22 Myr) early-M dwarf known to host two transiting planets—P b ∼ 8.46 days, R b = 4.38 − 0.18 + 0.18 R ⊕ , P c ∼ 18.86 days, R c = 3.51 − 0.16 + 0.16 R ⊕ . With visible RVs from Calar Alto high-Resolution search for M dwarfs with Exo-earths with Near-infrared and optical echelle Spectrographs (CARMENES)-VIS, CHIRON, HARPS, HIRES, Minerva-Australis, and Tillinghast Reflector Echelle Spectrograph, as well as near-infrared (NIR) RVs from CARMENES-NIR, CSHELL, IRD, iSHELL, NIRSPEC, and SPIRou, we provide a 5σ upper limit to the mass of AU Mic c of M c ≤ 20.13 M ⊕ and present a refined mass of AU Mic b of M b = 20.12 − 1.57 + 1.72 M ⊕ . Used in our analyses is a new RV modeling toolkit to exploit the wavelength dependence of stellar activity present in our RVs via wavelength-dependent Gaussian processes. By obtaining near-simultaneous visible and near-infrared RVs, we also compute the temporal evolution of RV “color” and introduce a regressional method to aid in isolating Keplerian from stellar activity signals when modeling RVs in future works. Using a multiwavelength Gaussian process model, we demonstrate the ability to recover injected planets at 5σ significance with semi-amplitudes down to ≈10 m s−1 with a known ephemeris, more than an order of magnitude below the stellar activity amplitude. However, we find that the accuracy of the recovered semi-amplitudes is ∼50% for such signals with our model.

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The University of Tokyo Atacama Observatory 6.5m telescope : On-sky performance of the near-infrared instrument SWIMS on the Subaru telescope

Ground-based and Airborne Instrumentation for Astronomy VIII ◽

10.1117/12.2560422 ◽

2020 ◽

Author(s):

Masahiro Konishi ◽

Kentaro Motohara ◽

Hidenori Takahashi ◽

Natsuko M. Kato ◽

Kosuke Kushibiki ◽

...

Keyword(s):

Near Infrared ◽

The University

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28 Three-year evaluation of yield and nutritive value of tifton-85 bermudagrass and tifton-85 bermudagrass-alfalfa mixtures produced as baleage in the southeast

Journal of Animal Science ◽

10.1093/jas/skz053.048 ◽

2019 ◽

Vol 97 (Supplement_1) ◽

pp. 21-22

Author(s):

Taylor J Hendricks ◽

Jennifer J Tucker ◽

Dennis W Hancock ◽

Lawton Stewart ◽

Jacob R Segers

Keyword(s):

Nutritive Value ◽

Near Infrared ◽

Cynodon Dactylon ◽

N Fertilization ◽

Forage Yield ◽

Botanical Composition ◽

Value Analysis ◽

University Of Georgia ◽

The University

Abstract Interseeding a legume, such as alfalfa (Medicago sativa), into bermudagrass (Cynodon dactylon) for baleage production can improve forage quality, reduce supplementation needs, and minimize production losses. The objective of this research was to compare the nutritive value and yield of bermudagrass with and without interseeded alfalfa when produced as baleage. This study was conducted at the University of Georgia Coastal Plain Experiment Station in Tifton, GA, on an established field of ‘Tifton 85’ (T85) bermudagrass. Ten 0.2-ha plots were randomly assigned to either T85+N or T85 interseeded with ‘Bulldog 805’ alfalfa (T85+Alf). T85+N received N fertilization (84 kg N/ ha) four times each growing season. Plots were harvested at early bloom stage every 28 to 35 days from 2016 to 2018, baled at 40–60% moisture, and individually wrapped. At each harvest, plots were evaluated for botanical composition and forage yield, and bales were sampled prior to wrapping for nutritive value analysis. Plots were also evaluated for botanical composition using the point-transect method 10 days post-harvest. Data were analyzed using mixed models and least significant differences at α = 0.05. Although seasonal yields were greater in the T85+N during year 1, alfalfa-bermudagrass plots produced at least one additional harvest each season of the study, and on average 8 cuttings per season each year following establishment. Ultimately this contributed to greater (P < 0.0001) cumulative yield in the alfalfa-bermudagrass treatment (34,783 vs. 25,608 kg/ha, respectively). Analyses of nutritive value through near-infrared spectroscopy (NIR) show that CP and in-vitro true digestibility (IVTD) were greater (P = 0.005 and P = 0.034, respectively) in the alfalfa-bermudagrass treatment than the bermudagrass-only treatment (14.0 vs 11.4% CP and 66.7 vs. 60.2% IVTD, respectively). Improvements in seasonal yield and nutritive value makes bermudagrass interseeded with alfalfa a viable option for baleage producers in the Southeast.

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CIRCE: The Canarias InfraRed Camera Experiment for the Gran Telescopio Canarias

Journal of Astronomical Instrumentation ◽

10.1142/s2251171718500022 ◽

2018 ◽

Vol 07 (01) ◽

pp. 1850002 ◽

Cited By ~ 1

Author(s):

Stephen S. Eikenberry ◽

Miguel Charcos ◽

Michelle L. Edwards ◽

Alan Garner ◽

Nestor Lasso-Cabrera ◽

...

Keyword(s):

Near Infrared ◽

Mechanical Design ◽

Infrared Camera ◽

High Time Resolution ◽

Low Resolution ◽

Novel Approach ◽

Narrowband Imaging ◽

Imaging Polarimetry ◽

Performance Results ◽

The University

The Canarias InfraRed Camera Experiment (CIRCE) is a near-infrared (1–2.5[Formula: see text][Formula: see text]m) imager, polarimeter and low-resolution spectrograph operating as a visitor instrument for the Gran Telescopio Canarias (GTC) 10.4-m telescope. It was designed and built largely by graduate students and postdocs, with help from the University of Florida (UF) astronomy engineering group, and is funded by the UF and the US National Science Foundation. CIRCE is intended to help fill the gap in near-infrared capabilities prior to the arrival of Especrografo Multiobjecto Infra-Rojo (EMIR) to the GTC and will also provide the following scientific capabilities to compliment EMIR after its arrival: high-resolution imaging, narrowband imaging, high-time-resolution photometry, imaging polarimetry, and low resolution spectroscopy. In this paper, we review the design, fabrication, integration, lab testing, and on-sky performance results for CIRCE. These include a novel approach to the opto-mechanical design, fabrication, and alignment.

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Isotope shifts in the [10.1]4–X4 (0–0) and [10.5]3–X4 (0–0) transitions of NdOThis article is part of a Special Issue on Spectroscopy at the University of New Brunswick in honour of Colan Linton and Ron Lees.

Canadian Journal of Physics ◽

10.1139/p08-066 ◽

2009 ◽

Vol 87 (5) ◽

pp. 537-541 ◽

Cited By ~ 1

Author(s):

Alain Bernard ◽

Amanda J. Ross

Keyword(s):

Near Infrared ◽

Thermal Emission ◽

Emission Spectra ◽

Spectroscopic Constants ◽

Isotopic Shifts ◽

Oppenheimer Approximation ◽

Global Fit ◽

Atomic Lines ◽

The University ◽

Line Positions

High-resolution Fourier transform thermal emission spectra of NdO (natural isotopic composition) have been recorded in the near infrared. Rotational analyses of the 0–0 band of the [10.132]4–X(1)4 system have been performed for all seven isotopomers, and the 0–0 band of the [10.506]3–X(1)4 system has been analysed for 142NdO, 144NdO, and 146NdO. Experimental data have been merged into a global fit to obtain a unique set of isotopically consistent rotational spectroscopic constants, scaled to 142NdO by assuming isotopic relationships within the Born–Oppenheimer approximation, but with independent band origins. These vibronic energy shifts reflect the isotopic shifts observed in some atomic lines also seen in the spectrum. A catalogue of experimental line positions and o−c values is available as Supplementary data.

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The Florida Barred Galaxy Program

International Astronomical Union Colloquium ◽

10.1017/s0252921100050090 ◽

1996 ◽

Vol 157 ◽

pp. 398-404 ◽

Cited By ~ 2

Author(s):

J. H. Hunter ◽

S. T. Gottesman

Keyword(s):

Near Infrared ◽

University Of Florida ◽

Infrared Observations ◽

Density Distributions ◽

Group Members ◽

Grid Codes ◽

Barred Spiral Galaxies ◽

Pattern Speeds ◽

Tree Codes ◽

The University

AbstractFor more than a decade, a group at the University of Florida has been constructing models of barred spiral galaxies that we have observed at the VLA. Group members include: S. T. Gottesman, G. Contopoulos, J. H. Hunter, several Ph.D. students, and collaborators at other institutions. The HI distributions in our galaxies are either gas rich, or nearly devoid of gas, in their bar regions. Initially, we deduced density distributions and potentials of the stellar disks and bars from near infrared observations, modeled the gas response assuming different pattern speeds, etc., and compared the models with our HI observations. This simple approach is successful in some cases, such as NGC 3359, but less successful in others. More recently, our approach has been toward selfconsistent models, including stars and gas. Our techniques range from the Contopoulos-Grosbøl-Kaufmann stellar dynamical approach to methods exploiting grid codes and SPH tree codes. Some of our observations and models will be reviewed, and some new results will be presented.

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