Deciphering the least luminous AGN-like LINER and constraining the M_BH - σ^* relation

Details Deciphering the least luminous AGN-like LINER and constraining the M_BH - σ^* relation Deciphering the least luminous AGN-like LINER and constraining the M_BH - σ^* relation

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..195c&link_type=abstract

NOAO Proposal ID #2010A-0195

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Scientific paper

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_BH - σ_* 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_BH - σ_* relation.

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