Info

molecular hydroge^l

• * V, . ft

infrared -

iiml 11111 m i IB

infrared -

iiml 11111 m i IB

Images of the Milky Way at different wavelengths. (a) Radio continuum (408 MHz), from Bonn, Jodrell Bank and Parkes. (b) HI column density, derived from 21 cm emission (Leiden-Dwingeloo survey). (c) Radio continuum (2.4-2.7 GHz),from Bonn and Parkes. (d) H2 column densities based on CO emission at 115 GHz (CFA at Harvard and in Chile). (e) Composite mid and far infrared from IRAS (1.25,2.2 and 3.5 ^m).(f) Mid infrared (6.8-10.8 ^m),data from the SPIRIT III instrument on the Midcourse Space Experiment (MSX) satellite. (g) Near infrared from COBE (12,60 and 100 ^m). (h) Optical from wide field photographs (compiled at ESO). (i) X-ray (0.25,0.75 and 1.5 keV) from ROSAT. (j) Gamma-ray (CGRO).All of the images (except the optical) have angular resolutions of between one-half and two degrees.All images are centered on the galactic center, and cover 10° above and below the galactic plane. [Courtesy of NASA, provided by the GSFC Astrophysics Data Facility (ADF) (a), (e), (g), (i), (j) ADF;(b) Dap Hartmann,"The Leider/Dwingeloo Survey of Galactic Neutral Hydrogen", Ph.D.Thesis, University of Leider, 1974; (c) A. R. Duncan, University of Queensland,Australia; (d) Thonas Dame, CFA; (f) Stephan D. Price, Hanscom AFB; (h) Axel Mellinger, University of Potsdam, Germany]

0 0

Post a comment