APM

APM, apm, or Apm may refer to any of the following:

APM 08279+5255

Coordinates: 08^h 31^m 41.70^s, +52° 45′ 16.8″ APM 08279+5255 is a very distant, broad absorption line quasar located in the constellation Lynx. It is magnified and split into multiple images by the gravitational lensing effect of a foreground galaxy through which its light passes. It appears to be a giant elliptical galaxy with a supermassive black hole and associated accretion disk. It possesses large regions of hot dust and molecular gas, as well as regions with starburst activity.

Gravitational lensing

APM 08279+5255 was initially identified as a quasar in 1998 during an Automatic Plate Measuring Facility (APM) survey to find carbon stars in the galactic halo. The combination of its high redshift (z=3.87) and brightness (particularly in the infrared) made it the most luminous object yet seen in the universe. It was suspected of being a gravitationally lensed object, with its luminosity magnified. Observations in the infrared with the NICMOS high-resolution camera on board the Hubble Space Telescope (HST) showed that the source was composed of three discrete images. Even accounting for the magnification, the quasar is an extremely powerful object, with a luminosity of 10¹⁴ to 10¹⁵ times the luminosity of the sun. Subsequent observations with the Hubble Space Telescope Imaging Spectrograph confirmed the presence of a third faint image between the two brighter images. Each component has the same spectral energy distribution and is an image of the quasar. Gravitational lensed systems with odd numbers of images are extremely rare; most contain two or four.

Issoire APM 20 Lionceau

The APM 20 Lionceau is a two-seat very light aircraft manufactured by the French manufacturer Issoire Aviation. Despite its classic appearance, it is entirely built from composite materials, especially carbon fibers.

Designed by Philippe Moniot and certified in 1999 (see EASA CS-VLA), this very light (400 kg empty, 634 kg loaded) and economical (80 PS engine) aircraft is primarily intended to be used to learn to fly, but also to travel with a relatively high cruise speed (113 knots).

A three-seat version, the APM 30 Lion, was presented at the 2005 Paris Air Show.

Specifications

Data from Jane's All The World's Aircraft 2003–2004

General characteristics

Performance