ConferenceSummary

TheCo-EvolutionofGalaxiesandTheirCentralRegionsSandyFaber

November9,2018

Contents

•  Sandy’scandidatesforReallyBigIdeas•  Sandy’scandidatesforSmallerBigIdeas•  Desiderata•  Challenges/UnansweredQuestions/Controversies

ReallyBigIdeas

•  Morphologicalstructuresatgalaxycentersmaymodulateinwardgasflows(andbuildbulgesandBHs?).Some<1kpc.Howdotheseevolveovertime?HowdotheyrelatetoglobalReffandM*?–  MassprofilesM*(r)>>rotationcurves>>stallpoints–  Usedustlanestomeasureinwardflowrates?–  Star-formationovertimemaymodifymassdistributions,flows–  Barsseemsimple.Whataboutnon-bars?–  Howdocentralfeaturesscalewithglobalproperties:,Reff,M*

•  Eventsatgalaxycentersmaybecyclical.Candatabephasedtorevealthecycle?E.g.,ring,SFR,dust,AGN,BPT.–  ManydataindicatepastactivityatGalacticCenterafewmillionyrago:X-ray,FermiBubble,part-filledring.Consistentwitharingeventnowre-forming?–  Cansamepatternsbeseeninothergalaxies?

•  Star-forminggalaxiesaredefinedbybothReffandM*.

NGC1512 NGC3368 NGC1433

NGC1097 NGC3081 NGC4736

SmallerBigIdeas•  MagneticfieldsmaymodulategasmotionsinGalacticCenterQSOproperties:

-  EtavariesenormouslywithBHaccretionrate.Rememberthis!-  Spectraare2-Dfamily.Oneismetallicity.-  MetallicityofQSOsis4-5Z¤.ImpliesstronglocalSF.ESF~EBH?-  FermiBubblescouldbelong-lived,ubiquitousandplayaroleinquenching.

•  Allpropertiesoflocalgalaxiesvarysmoothlythroughthegreenvalley,consistentwithasteadyevolutionaryflow.-  S0shavesameHIgasasspirals.Howisthis?-  E’sdon’t,yethaveLyα.Howisthis?-  S0squenchbecausetheylosetheirH2.Howhappen?

•  BothmajorandminormergersareneededtocreateE’s.•  Confirmingevidencethatmajormergerstriggerthebrightest

QSOsandSFrates.•  MoremassiveE’sarehardertocleanoutbutAGNscandoit.

Desiderata

•  Catalogsoflocalgalaxies:massprofiles,SFprofiles,morphologies,gasmaps(bothHIandH2).–  Catalogofrings:https://en.wikipedia.org/wiki/AINUR

•  ReliablecatalogsofE’sandS0’satallredshifts.•  Measurementsusingallthenewtools:

–  Manynewtoolsarecoming:ALMA,GRAVITY,C+,Neratios

Challenges/UnansweredQuestions/Controversies•  HowdoweconvertalltheseminutiaeintolawslikeM~σ4?•  Whereisthe“valve”thatregulatesmassflowontothecircum-

nucleardisk?Isitglobalproperties:bar,Reff,M*?Orisitlocal:i.e.,structureoftheBHregion?

•  HowdoBHsgrowinsmallbulges?suppressedbySNae?wandering?lackofdifferentialrotation?lackofbars?-  WhyistheBHintheMilkyWaysosmall?WhyistheBHinM31sobig?Is

thereinnerstructure/propertiesnotcapturedbyΣ1?•  DoAGNsplayaroleinquenchingspirals?

-  Ifnot,thenwhyarebulgesred?•  Canjetsprovidefeedback?•  HowwasourFermiBubbleinflated?BySFactivity?ByAGN?

ProjectIdeas•  StellarmassmapsoflocalspiralsfromHST.Correlatewithmorphological

features.(Longmore)•  MassinflowratesfrmALMAvelocitymaps(Longmore)•  LookforinflowinggasinMWinside100pc.(Longmore)•  Usespiralpatternsinsideringstocalculateinflowrates.(Faber)•  HowlongwillittakecurrentSFRinMWringtochangerotationcurve?How

longinothergalaxies?(Longmore)•  PredictFermiBubblesindifferentgalaxiesassumingdifferentenergyinput

sourcesandsimplescalinglaws.Howtodetect?(Faber).•  AretheremissingdwarfsintheComaCluster(Kormendy)?•  DoSersicindicesofEenvelopescorrelatewithenvironment?(Faber)•  DevelopabetterwaytoclassifyS0saccuratelyinquantity.(Faber)•  LookforcyclesinBPTAGNsthatcorrelatewithΣ1,ringstate,etc.(Faber)•  ArePSB(fast-trackquenching)morecommonatlowermassesinGV(Faber)?•  Whatisthequenchingmechanismforgalaxiestodaynear1010M¤?(Faber)•  UsetheAGNlumfunctionbackinthepasttotestwhetherBHgrowthis

“kinked”.(Faucher-Giguere)