Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.stsci.edu/~kgordon/papers/2006ApJ...651..874H.html
Дата изменения: Thu Jan 21 20:01:04 2016 Дата индексирования: Sun Apr 10 16:20:50 2016 Кодировка: ISO8859-5 Поисковые слова: mercury surface |
We present Spitzer Space Telescope images of the isolated dwarf galaxy UGC 10445. The galaxy is detected at all photometric bands (3.6-160 ЮМm), as well as in the Multiband Imaging Photometer for Spitzer (MIPS) spectral energy distribution mode (55-95 ЮМm). We derive a star formation rate of 0.25 Msolar yr-1, based on HЮБ and infrared flux densities. There is over 106 Msolar of cold dust (T~18 K) in the galaxy, represented by 160 ЮМm emission, which extends to a larger radius than the ultraviolet (UV), optical, and near-infrared light. Such extended emission has been seen previously only in dwarf galaxies in cluster environments. We suggest that the source of heating for this dust is UV light, originating in star-forming complexes. To produce the large quantity of dust requires a higher rate of star formation in the past than is currently observed.
[ADS]
ADS Citation Query
# citations = 24
citations vs. year [year,citations]
[2007,6][2008,7][2009,3][2010,2][2011,3][2012,1][2013,2]
Copyright © 2012 Karl D. Gordon All Rights Reserved