NOAO >   Observing Info >   Approved Programs >   2017B-0312

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Program Information for 2017B-0312


PI: Bryan Miller, Gemini Observatory, bmiller@gemini.edu
Address: Casilla 603, La Serena, IV Region 1700000 Chile

CoI: Thomas H. Puzia, Pontificia Universidad Catolica de Chile
CoI: Roberto R Munoz, Pontificia Universidad Catolica de Chile
CoI: Matthew Taylor, Gemini Observatory
CoI: Paul Eigenthaler, Pontificia Universidad Catolica de Chile
CoI: Karen Ribbeck, Pontificia Universidad Catolica de Chile
CoI: Ruben Sanchez-Janssen, UK Astronomy Technology Centre
CoI: Mia Bovill, STScI
CoI: Yasna Ordenes, Pontificia Universidad Catolica de Chile
CoI: Simon Andres Angel, Pontificia Universidad Catolica de Chile

Title: Neighbourhood Watch: A Survey of Baryonic Substructures in the Nearby Universe

Abstract: We propose to conduct a census of all baryonic structures within the virial radius, $R_{rm vir}$ of the nearby loose group environment around NGC,2997 in the optical filters $u'g'i'$ with CTIO/DECam.~Our proposed observations will reach unprecedented point source depths of $u'!=!26.0$, $g'!=!25.2$, and $i'!=!24.4$ AB mag which will detect $>!99%$ of all compact objects, i.e.~globular clusters (GCs) and ultra- compact dwarf galaxies (UCDs), and reveal all low-surface brightness baryonic structures down to $mu_{i}!simeq!27$ mags/arcsec$^2$.~This unique dataset will allow us for the first time i) to derive a complete globular cluster luminosity function (GCLF) out to $R_{rm vir}$ for these galaxies, ii) search for spatial over-densities and unique age/metallicity distribution functions (ADF/MDF) in the GC population, iii) test current state-of-the-art cosmological simulations by detecting $sim!10-100$ new low-surface brightness dwarf galaxies associated with each target group and iv) probe the complex interaction/merger/accretion history of these groups.~The proposed spatial extent/observational depth will photometrically characterize these low-density environments and their baryonic sub-structure content in the optical to an extent that rivals similar work done for the Local Group.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  CT-4m/DECam -- 3n on Jan 09 - Jan 14 2018


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017B-0312

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