Wide-Field Survey of Dwarf Satellite Systems Around 10 Hosts in the Local Volume. (arXiv:1909.07389v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Carlsten_S/0/1/0/all/0/1">Scott G. Carlsten</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Greco_J/0/1/0/all/0/1">Johnny P. Greco</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Beaton_R/0/1/0/all/0/1">Rachael L. Beaton</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Greene_J/0/1/0/all/0/1">Jenny E. Greene</a>
We present the results of an extensive search for dwarf satellite galaxies
around 10 primary host galaxies in the Local Volume (D$<$12 Mpc) using archival
CFHT/MegaCam imaging data. The hosts span a wide range in properties, with
stellar masses ranging from that of the LMC to ${sim}3$ times that of the
Milky Way (MW). The surveyed hosts are: NGC 1023, NGC 1156, NGC 2903, NGC 4258,
NGC 4565, NGC 4631, NGC 5023, M51, M64, and M104. We detect satellite
candidates using a consistent semi-automated detection algorithm that is
optimized for the detection of low surface brightness objects. Depending on the
host, our completeness limit is $M_g{sim}-8$ to $-10$ (assuming the distance
of the host). We detect objects with surface brightness down to
$mu_{0,g}{sim}26$ mag arcsec$^{-2}$ at $gtrsim90%$ completeness. The survey
areas of the six best-surveyed hosts cover most of the inner projected $R<150$
kpc area, which roughly doubles the number of MW-mass hosts surveyed at this
level of area and luminosity completeness. The number of detected candidates
range from 1 around M64 to 33 around NGC 4258. In total, 153 candidates are
found, of which 93 are new. While we defer an analysis of the satellite
luminosity functions of the hosts until distance information is available for
the candidates, we do show that the candidates are primarily red, spheroid
systems with properties roughly consistent with known satellites in the Local
Group.
We present the results of an extensive search for dwarf satellite galaxies
around 10 primary host galaxies in the Local Volume (D$<$12 Mpc) using archival
CFHT/MegaCam imaging data. The hosts span a wide range in properties, with
stellar masses ranging from that of the LMC to ${sim}3$ times that of the
Milky Way (MW). The surveyed hosts are: NGC 1023, NGC 1156, NGC 2903, NGC 4258,
NGC 4565, NGC 4631, NGC 5023, M51, M64, and M104. We detect satellite
candidates using a consistent semi-automated detection algorithm that is
optimized for the detection of low surface brightness objects. Depending on the
host, our completeness limit is $M_g{sim}-8$ to $-10$ (assuming the distance
of the host). We detect objects with surface brightness down to
$mu_{0,g}{sim}26$ mag arcsec$^{-2}$ at $gtrsim90%$ completeness. The survey
areas of the six best-surveyed hosts cover most of the inner projected $R<150$
kpc area, which roughly doubles the number of MW-mass hosts surveyed at this
level of area and luminosity completeness. The number of detected candidates
range from 1 around M64 to 33 around NGC 4258. In total, 153 candidates are
found, of which 93 are new. While we defer an analysis of the satellite
luminosity functions of the hosts until distance information is available for
the candidates, we do show that the candidates are primarily red, spheroid
systems with properties roughly consistent with known satellites in the Local
Group.
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