Other
Scientific paper
Feb 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..258s&link_type=abstract
NOAO Proposal ID #2008A-0258
Other
Scientific paper
Dwarf galaxies are building blocks of larger galaxies within the framework of hierarchical galaxy formation in a cold dark-matter universe, and they might keep a lot of information on the mass assembly of the host galaxy. Galaxies in the Local Group (LG) are mainly found around three galaxies, i.e., Milky Way, M31, and NGC 3109, and the comparison in the number density of Galactic dwarf galaxies among in the direction of M31 subgroup, that of NGC 3109 subgroups, and the other directions puts important limits on whether or not Galactic dwarf galaxies accreted from the direction of the existing LG subgroup. However, the completeness in the detection of Galactic dwarf galaxies in the direction of NGC 3109 subgroup is expected to be low due to lack of deep photometric data. We search for Galactic dwarf galaxies in the direction of NGC 3109 subgroup by obtaining photometric data down to 21 mag in g'- and r'-bands, and set limits on whether Galactic dwarf galaxies accreted along the existing Local-Group subgroup.
Hasegawa Takashi
Sakamoto Tsuyoshi
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