Near-simultaneous optical and infrared spectrophotometry of active galaxies

AGN Zoo and Classications of Active Galaxies

We review the variety of Active Galactic Nuclei (AGN) classes (so-calledAGN zoo") and classification schemes of galaxies by activity types based on their optical emission-line spectrum, as well as other parameters and other than optical wave-length ranges. A historical overview of discoveries of various types of active galaxies is given, including Seyfert galaxies, radio galaxies, QSOs, BL Lace...

Portable Refrigerant Identification by Near Infrared Spectrophotometry

Near-Infrared Spectra of Ultraluminous Infrared Galaxies.

Near-infrared spectra with a resolution of lambda&solm0;Deltalambda approximately 1100 in the rest-wavelength range of 1.8-2.2 µm have been obtained for a complete sample of 33 ultraluminous infrared galaxies (ULIRGs). Of the 33 objects observed, two show evidence of a central active galactic nucleus (AGN) through either a broad Paschen-alpha line or emission in the 1.963 µm fine structure of [...

Near-Infrared Spectrophotometry of the Satellites and Rings of Uranus

New spectrophotometry from 1.5 to 2.5 /zm is reported for the Uranian satellites Titania, Oberon, and Umbriel. A spectrum of the rings of Uranus from 2.0 to 2.4/zm is also reported. No evidence is found for frost covering the surface of the ring material, consistent with the low albedo of the rings (P~ = 0.03) previously reported by Nicholson and Jones (1980). The surfaces of the satellites are...

High-resolution Optical/near-infrared Imaging of Cool Ultraluminous Infrared Galaxies

We present high spatial resolution BIHK@-band imaging of a sample of ultralu(FWHMB 0A.3È0A.8) minous infrared galaxies ULIGs) with ““ cool ÏÏ mid-infrared colors (L ir[ 1012 L _ ; ( f25 km/f60 km\ 0.2), which select against active galactic nucleusÈlike (AGN-like) systems, a complementary sample to the ““ warm ÏÏ ULIGs of Surace and coworkers. We Ðnd that all of the cool ULIGs are either advance...