NOAO >   Observing Info >   Approved Programs >   2017B-0809

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Program Information for 2017B-0809


PI: Matt Berhsady, U. of Wisconsin, Madison, mab@astro.wisc.edu
Address: Department of Astronomy, 475 N. Charter St., Madison, WI 53706 United States

CoI: Merida Batiste, Georgia State U.
CoI: Misty C Bentz, Georgia State U.

Title: BRAVE: Improving Measurements for Calibration of the M_BH - Relation for AGN

Abstract: Black hole scaling relations are powerful tools for investigating the formation and evolution of structure across cosmic time. Such investigations are generally limited to active galaxies (AGN), since the intensely bright AGN emission allows $M_{BH}$ to be probed over cosmological distances. The low scatter in the $M_{BH}-sigma_{star}$ relation makes it particularly useful for evolutionary studies, so accurate calibration with a sample of local AGN is essential. Most local AGN with $M_{BH}$ determinations are late-type spirals with significant kinematic substructure, which can bias $sigma_{star}$ determinations from single aperture spectroscopy. Spatially resolved spectroscopy significantly reduces these effects. We propose to obtain HexPak spatially resolved spectroscopy for the bulges of four nearby AGN host galaxies, to accurately determine $sigma_{star}$. Combined with other observing programs, including previous HexPak observations, this will increase the sample of AGN with spatially resolved spectroscopy to 20, which is $sim2/3$ of the calibration sample for the $M_{BH}- sigma_{star}$ relation for AGN. This study promises to dramatically improve calibration of the $M_{BH}-sigma_{star}$ relation, thereby improving its utility as a probe of galaxy evolution.

Program Type: WTAC

Scheduled Nights:
Run 1 (2017B):  WIYN/HEXPK -- 3n on Sep 26 - Sep 28 2017


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NOAO >   Observing Info >   Approved Programs >   2017B-0809

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