Physics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..238..321b&link_type=abstract
Black Holes from Stars to Galaxies -- Across the Range of Masses. Edited by V. Karas and G. Matt. Proceedings of IAU Symposium #
Physics
Scientific paper
Measuring the kinematics of ionized gas disks has become one the most important methods to determine the masses of supermassive black holes in the nuclei of quiescent galaxies. For high-quality HST data, a formal mass measurement uncertainty of 25% or better has been claimed with well-behaved disks. Many of the ionized gas disks in galactic nuclei contain substantial amounts of interstellar dust, however. As the optical ionized gas radiation is easily absorbed and scattered by interstellar dust grains, this might affect the observed rotation curve. Using detailed Monte Carlo radiative transfer simulations in realistic models for galactic nuclei, we critically investigate the influence of interstellar dust in ionized gas disks on the rotation curves and the resulting SMBH mass measurements. We find that, depending on inclination and optical depth of the disks, neglecting the effect of interstellar dust attenuation in the interpretation of the observed velocity field might significantly affect black hole mass estimates.
Baes Maarten
Piasecki Sławomir
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