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Astronomy Colloquium - " Measuring masses of black holes in early-type galaxies using ALMA"

Event Type
Seminar/Symposium
Sponsor
Astronomy Department
Location
Astronomy 134
Date
May 2, 2017   3:45 pm  
Speaker
Dr. Aaron Barth, Professor, UC, Irvine
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-333-3090
Views
30
Originating Calendar
Astronomy Colloquium Speaker Calendar

Taking an accurate census of supermassive black holes in nearby galaxies has been a long-standing goal in astronomy, and great progress has been made using observations from the Hubble Space Telescope, from large ground-based telescopes with adaptive optics, and from VLBI observations of water maser disks. The ALMA Observatory now offers a new method for measuring the masses of black holes in nearby galaxies, by resolving the kinematics of circumnuclear disks of cold molecular gas on sub-arcsecond scales. I will present results from an ALMA program designed to identify the best targets for this method and describe dynamical modeling results for the elliptical galaxy NGC 1332, the first galaxy in which the black hole's gravitational sphere of influence has been resolved by ALMA.

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