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This Review Article summarizes our current understanding of ionized outflows in active galactic nuclei, observed in absorption in the ultraviolet and X-ray wavelengths, including the most relevant observations as well as their origin and acceleration mechanisms.
In the Spitzer Space Telescope’s 16 years of operation, it observed many Solar System objects and environments. In this first Review Article of a pair, Spitzer’s insights into comets, centaurs and Kuiper belt objects—all remnants of the Solar System’s formation—are summarized.
In the Spitzer Space Telescope’s 16 years of operation, it observed many Solar System objects and environments. In this second Review Article of a pair, Spitzer’s insight into asteroids, dust clouds and rings and the ice giant planets are summarized.
The Spitzer Space Telescope launched when the study of exoplanets was in its infancy, and yet it was remarkably successful in characterizing both exoplanet and brown dwarf systems through their mid-infrared emissions. This Review collates the highlights of Spitzer-based research in these fields.
Spitzer revealed the properties of luminous and ultraluminous infrared galaxies, the role of starbursts and actively accreting supermassive black holes in powering these sources and found evidence for energetic feedback on their interstellar gas and dust.
The Spitzer Space Telescope accurately measured stellar masses, ages and star formation rates for a large sample of typical galaxies at high redshifts, allowing an initial exploration of some of the key science drivers of the James Webb Space Telescope.
The Spitzer Space Telescope made huge advances in the study of debris disks around main-sequence stars and white dwarfs, increasing their number by an order of magnitude, and leading the way for the next generation of space-based infrared missions.
Spitzer revolutionized studies of active galactic nuclei through its high sensitivity and mapping speed at mid-infrared wavelengths. This Review summarizes key Spitzer insights on active galactic nuclei, including the properties of their dust and shocked gas.
Spitzer revealed the power of astrophysical polycyclic aromatic hydrocarbon molecules to probe the local physical and chemical conditions and processes, for example, establishing the relation between their abundance and galaxy metallicity for the first time.
