Infrared Characters of Host Galaxies with H2O Megamaser

Details Infrared Characters of Host Galaxies with H2O Megamaser Infrared Characters of Host Galaxies with H2O Megamaser

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001chphl..18..841y&link_type=abstract

Chinese Physics Letters, Volume 18, Issue 6, pp. 841-843 (2001).

Physics

Scientific paper

Infrared characters of all the host galaxies with the H2O megamaser have been studied. The most striking feature is the anticorrelation of S(60)/S(100) versus S(12)/S(25), and S(25)/S(60) versus S(12)/S(25). The anticorrelation in the flux density ratio can been explained by coexistence of large and very small dust particles. The latter, which are heated by absorption of single photon, are believed to be responsible for the bulk of 12 µm radiation. If the photon energy of the host galaxy is small, this implies large S(12)/S(25) and small S(60)/S(100). However, when photon energy density becomes larger, the infrared spectrum will peak at wavelengths ≤ 100 µm and enhance emission at 25 µm. As a consequence small S(12)/S(25) and large S(60)/S(100) are observed.

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