NOAO >   Observing Info >   Approved Programs >   2018A-0451

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Program Information for 2018A-0451


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

CoI: Zach Pace, U. of Wisconsin, Madison
CoI: Shravan Shetty, U. of Wisconsin, Madison
CoI: Camilo Machuca, U. of Wisconsin, Madison
CoI: Samantha Penny, University of Portsmouth
CoI: Kyle Westfall, UCO / Lick Observatory
CoI: Kate Rubin, San Diego State U.
CoI: Christy Tremonti, U. of Wisconsin, Madison
CoI: Niv Drory, U. of Texas, Austin
CoI: Renbin Yan, U. of Kentucky
CoI: Kevin Bundy, UCO / Lick Observatory
CoI: David Law, STScI

Title: Ground-truth for MaNGA Kinematics: Galactic Winds, ISM Turbulence and Dynamical Mass

Abstract: Spectroscopic determination of stellar and gas motions -- kinematics -- is a fundamental diagnostic of physical conditions in the interstellar medium and stellar dynamics. In SDSS-IV MaNGA's unsurpassed spectral coverage and sample size is limited by spectral resolution 3-4$times$ larger than the intrinsic line-widths of gas and stars in normal, star- forming spiral disks and dwarf galaxies ($sigmasim$ 20~km/s). The MaNGA survey team have undertaken a major effort to characterize its instrumental resolution. The quality of these corrections appear to be approaching what is required to achieve reliable line-widths at the $sigmasim$30 km/s level for individual emission-lines, but the relaibility for stellar kinematics is less clear; we lack ground-truth, i.e., a reference set of galaxies observed at higher spectral resolution. Given the importance of understanding the fidelity of these corrections for a wide range of science of direct interest to scientists at UW-Madison and across the collaboration, {bf we propose to observe several dozen carefully selected galaxies} from the 10,000 galaxy MaNGA sample over two semesters to calibrate these corrections and establish their accuracy and precision. Galaxies will be observed in the H$alpha$ and H$beta$-MgI regions at instrumental resolutions of 8- 15~km/s. Galaxies will be selected to address compelling science questions concerning the origin of (a) the ubiquitous winds coming from star-forming disks; (b) ISM turbulence; and (c) the quenching of dwarf galaxies. With good weather in Jan 2018 and for or full request in 2018A, this is the second and last submission of this program.

Program Type: WTAC

Scheduled Nights:
Run 1 (2018A):  WIYN/HEXPK -- 2n on Jun 08 - Jun 09 2018
Run 2 (2018A):  WIYN/HEXPK -- 3n on Jun 15 - Jun 17 2018


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