Constraining the Mass of NGC 4258 with Satellite Galaxies

Details Constraining the Mass of NGC 4258 with Satellite Galaxies Constraining the Mass of NGC 4258 with Satellite Galaxies

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934621s&link_type=abstract

American Astronomical Society, AAS Meeting #219, #346.21

Astronomy and Astrophysics

Astronomy

Scientific paper

We combine spectroscopic observations from the APO 3.5-meter telescope with SDSS spectra to conduct a survey of satellite galaxies around the nearby spiral NGC 4258. Of the 35 observed objects, 20 appear to be members of the system. Using the projected line-of-sight velocities of the satellite galaxies and a Jeans equation approximation, we constrain the total mass of NGC 4258 to within 50%. Further observations are expected to yield around 20 more satellite velocity measurements.

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