Results of submillimeter ( 450 \mu m and 850 \mu m ) observations of a nearby dwarf irregular galaxy NGC 4214 with SCUBA on JCMT are presented .
We aimed at examining the far-infrared to submillimeter spectral energy distribution ( SED ) and properties of dust thermal emission in a low metallicity environment by choosing NGC 4214 of which gas metallicity ( log O/H + 12 ) is 8.34 .
We found that the SED is quite similar to those of IRAS bright galaxies sample ( IBGS ) which are local bright star-forming galaxies with metallicity comparable to the solar abundance .
A dust temperature and an emissivity index for NGC 4214 obtained by a fitting to the single temperature greybody model are T _ { d } = 35 \pm 0.8 K and \beta = 1.4 \pm 0.1 , respectively , which are typical values for IBGS .
Compiling the previous studies on similar nearby dwarf irregular galaxies , we found that NGC 1569 shows similar results to those of NGC 4214 , while NGC 4449 and IC 10 SE show different SEDs and low emissivity indices .
There seems to be a variety of SEDs among metal poor dwarf irregular galaxies .
We examined dependence on intensity of interstellar radiation field as well as two-temperature model , but the origin of the difference is not clear .
Some mechanism ( s ) other than metallicity and interstellar radiation field must be responsible for controlling dust emission property .