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 ...

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...