NOAO >   Observing Info >   Approved Programs >   2010A-0195

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Proposal Information for 2010A-0195


PI: Anca Constantin, James Madison University, constaax@jmu.edu
Address: Physics Department, 901 Carrier Drive MSC 4502, Harrisonburg, VA 22807, USA

CoI: Anil Seth, Harvard-Smithsonian Center for Astrophysics
CoI: Michele Cappellari, Oxford University
CoI: Joseph Shields, Ohio University

Title: Deciphering the least luminous AGN-like LINER and constraining the M_\rm BH - \sigma^* relation

Abstract: The newly discovered broad H(alpha) emission line in the nuclear spectrum of M94 (NGC 4736), which is unambiguously associated with X- ray, radio, and variable UV compact source detections, identifies this object as the least luminous accretion-type LINER discovered thus far, and therefore, an important example of accretion at extremely low levels. A deep understanding of the true excitation mechanism in this nucleus is however hampered by the huge uncertainty (>2 orders of magnitude) in the black hole mass as estimated by the M_\rm BH - \sigma_* relation and three other methods based on the observed AGN emission [FWHM(H(alpha)), X-ray excess variance, mid-IR line luminosities]. We propose Gemini NIFS + Altair observations that will enable measurement of any black hole mass consistent with the M_\rm BH - \sigma_* relation.


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NOAO >   Observing Info >   Approved Programs >   2010A-0195

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