Unlocking the true potential of optical spectroscopy on nanoscale requires development stable and low-noise laser sources. Here, we have developed a supercontinuum (SC) source based an all-normal dispersion fiber pumped by femtosecond demonstrate high resolution, spectrally resolved near-field measurements in near-infrared (NIR) region. Specifically, explore reduced-noise requirements for apert...

We present diffraction-limited 2-25 µm images obtained with the W. M. Keck 10-m telescopes that spatially resolve the cool source, IRS 21, one of a small group of enigmatic objects in the central parsec of our Galaxy that have eluded classification. Modeled as a Gaussian, the azimuthally-averaged intensity profile of IRS 21 has a half-width half-maximum (HWHM) size of 650±80 AU at 2.2 µm and an...

New moderate-resolution mid-infrared spectroscopy at 10 μm of 27 infrared galaxies is presented. The galaxies have been chosen from three 60 μm selected and one 12 μm selected complete flux-limited catalogs of galaxies; 17 of these sources have LIR(8– 1000μm) ≥ 5 × 10 L⊙. A high-resolution spectrum of the source Arp 299B1 is also presented. Combining these new results with previously published ...

The report of Stevenson and Bolduan (Science, 116, 111, 1952) that species of bacteria could be differentiated by their infrared spectra suggested that this technique might be employed to study the effects of antibacterial agents on the organism. The preliminary experiments here reported were concerned with the effect of benzalkonium chloride (0.1 per cent) and phenol (5 per cent) upon the infr...

Measurements of far-infrared spectra are made far more difficult than the corresponding measurement of midor near-infrared spectra because of the weakness of the source. The spectral energy density of a blackbody at 1400 K is almost 5800 times weaker at 10 cm 1, and about 60 times weaker at 100 cm 1, than it is at 1000 cm 1. Since the sensitivity of any measurement of a midor far-infrared spect...

Class II methanol masers are signs of massive young stellar objects (MYSOs). Recent findings show that MYSO accretion bursts cause flares these masers. Thus, maser monitoring can be used to identify such bursts. Burst-induced SED changes provide valuable information on a very intense phase high-mass star formation. In mid-January 2019, flare the G358.93-0.03 was reported. ALMA and SMA imaging r...

NASA’s Cosmic Background Explorer satellite mission, the COBE, laid the foundations for modern cosmology by measuring the spectrum and anisotropy of the cosmic microwave background radiation and discovering the cosmic infrared background radiation. I describe the history of the COBE project, its scientific context, the people who built it, and the scientific results. The COBE observed the unive...

Legume and grass silage samples (n = 121) were collected from commercial forage testing laboratories (trial 1). Samples were dried at 55 degrees C for 48 h, ground, scanned on a near-infrared reflectance spectrophotometer, and analyzed for crude protein (CP), soluble CP, acid detergent fiber (ADF) CP, and neutral detergent fiber (NDF) CP by wet chemistry methods. Sixty samples were selected for...