WisconsinODIPlans

DanielHarbeck&JayGallagherAASJune2009

ODISSETheODISpectralSurveyExperimentP.I.AmyBarger,U.Wisconsin‐Madison

•  Usethewide‐fieldODIcapabilitytoperformanarrow‐bandimageofalargeareaofthenorthernskyinthelongestwavelength9200Alow‐skyemissionatmosphericwindow

•  PickoutstrongemissionlineobjectsinvariousredshiQwindows

•  HighlycomplementarytowideconRnuumimagingsurveyssuchasPanSTARRSandLSST,whichwillprovidecomplementarycolorinformaRon

PrimaryScienceGoals

Findthelowestmetallicitygalaxiesintheuniverse

MaptheevoluRonoflineemissionwithredshiQ

Findfaintz~7quasars

BaryonacousRcoscillaRons

The9200Afilterchooses:z=0.4Halphaz=0.8[OIII]5007z=1.5[OII]3727z=6.6Lalpha

SelectedgalaxiesintheGOODS‐N(145squarearcminutes)

USELS

usel

emit

9120AselecRon

8160,9120selecRon

Emissionlinegalaxies

(Kakazu,Cowie,&Hu2008Hu,Cowie,Barger,&Kakazu2009)

12+log(O/H)=7.27=1/40Z [7.17–7.39}→Comparabletotheminimummetallicityfoundlocally[e.g.IZw18;12+log(O/H)=7.1–7.2]

Compactobject

6.5hoursKeck/DEIMOS2Dspectrum

HST/ACS(B,V,I)12.5”x12.5”

NB816

Ultra‐strongemission‐linegalaxiespickupextremelylowmetallicitysystems:ODISSEshouldletusdetermineifthereisalowmetallicityfloorinthegalaxies

USELmetallicity‐luminosity

z=2LBGsbasedonNII/Halpha

Erbetal.2005

Local

z=2LBGs

USELspickouttheverylowmetallicityedgeofthegalaxymetal‐luminosityrelaRon

USELS

ODISSEDESIGN

•  9200/100Afilter•  20minuteperfield+5minutez‐bandexposure•  23.55‐sigmalimiRng3’’aperturemagnitude(AB)•  2000squaredegreecoverage(approx100nights)•  FieldswithdeepconRnuumsocolorselecRoncanbeused

toseparateredshiQs•  Approximately250,000Ultra‐strongemikers(EW(Halpha)>80A)

•  Approximately2millionemissionlinegalaxies(aboutathirdofthesewillbe[OIII]5007atz=0.8)

EGGOEvoluRonofGalaxyGroupswithODI

InvesRgaRngInterrelaRonshipsBetweenGalaxyBuildingBlocksP.I.:J.Gallagher,E.Wilcots,&D.Harbeck

U.Wisconsin‐Madison•  Studyenvironmentalinfluencesingalaxygroupsoverrange

ofmass&environments.

•  Applywide‐fieldODI:mapsubstructuresingalaxygroups‐‐Rdaldebris,dwarfs,outerfeatures.

•  U‐band:locaRonsofrecentstarformaRoninlowbaryondensityregions.

•  Narrowbandemissionlineimages:ionizedgas.

•  Deepimaging—outerdiskstructuresRdaldebris/outerdistorRons.

•  OpRcalcomponentofmulR‐wavelengthproject.

EGGO:Outerdisks:opRcalboundaries:U‐banddetecRonofsitesofrecentstarformaRonArp78U‐band:WIYNMini‐Mosaic(J.Gallagher,R.Kotulla,U.Fritze):

Outerarm:alsoXUVfeatureinGALEXimaging

ObjecRves:Circum‐GalacRcStructures:EvidenceforLevelsofInteracRons

MulRpleinteracRonscandriveevoluRonaQergroupformaRon:

observingprocessofhierarchicalgalaxygrowth.EvidenceinRdal

debris.

IIZw23system:WIYNE.Wehner&J.Gallagher

EGGO:SelecRngTargets

•  Groupsizes≈1Mpc1degreeat60Mpc.•  Innerscaleof≈1kpctoresolve&disRnguishdwarfgalaxies.10angularresoluRonelementsD<50Mpc.•  PhotometryatGCpeakatM≈‐7.5D<30Mpc•  KeydistancerangeforEGGO:10‐50Mpc.•  Dozengroupstocoverrangeinmass&locaRons

TheLivingGalaxySurveyofM33P.I.:R.Townsend&M.Orio

•  UBVmonitoringofM33over~2years

•  Lookfor–  Periodicvariables(Cepheid,β

Cepheid,Bsupergiant)–  Irregularvariables(Miras)–  X‐raysources–  LBVoutbursts–  Novaoutbursts–  Gonzoobjects

•  ExploremetallicitycorrelaRons•  Also,censusofextendedhalo•  WhatdoesODIbring?

–  SuperbangularresoluRon–  HighRmeresoluRon–  BluesensiRvity

Andtheever‐changingAndromedagalaxy:PI:Orio

•  CovermajoraxisofthelargestspiraloftheLocalGroupweextendoutto6degreesawayfromthecenter,weobservemostluminousmassofthegalaxy.

•  17%ofthestellarcontentiscomprisedonlywithinthecentralarcminute.

•  Observeaverylargenumberofclassicalandrecurrentnovaeandallsortofflaringsources.

•  EveryweektensofX‐raytransientscanbeobservedandopicalidenificaioniscrucialtounderstandtheirphysics.

•  By‐weeklyimagingofthecentralfieldandbi‐monthlyobservaionsof~6‐7peripheralareas,comprisingalsomanyglobularclusters.

•  The“box”of1.7x0.9arcminintherightwasimagedwithChandraHRC‐IattheendofDecemberof2004andlessthan8weekslater.Thetransientsaremarkedwithgreencircles.

StandardPIProjectIdeasUnderDiscussion

•  Narrowbandimaging—GalacRcemissionlinefromWHAMsurveys.

•  StellarcontentofhalosofLocalGroupgalaxies.

•  GalacRcstarformingregionstudies.

•  CurrentesRmate~70‐80%WisconsinODIRmetosurveys,20‐30%PIprojectsassignedinnormalway.