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Multiphase Madness: Resolving the CGM in Theory and Observations

A workshop that will bring together theorists and observers across all wavelengths to discuss multiphase gas formation and survival in the circumgalactic medium (CGM) of galaxies.

August 21-23, 2024

Center for Astrophysics | Harvard & Smithsonian
60 Garden St. Cambridge, MA 01238

Multiphase Madness Conference banner image
S. Lucchini; NASA / CXC / M.Weiss / Ohio State / A. Gupta et al.; J. Suresh et al.; C. Bustard et al.


Important Dates:

Abstract submission closed : April 12, 2024
Abstract author notifications : mid May
Conference : Aug 21-23, 2024


Event Details:

The CGM poses many unsolved questions that are critical to understanding galaxy evolution. Recent observations—spanning from radio to optical to X-ray—are beginning to constrain the properties of gas around galaxies, and future observatories will be critical in this endeavor. The multiphase CGM also poses many challenges to simulators, due to the vast dynamic range involved in the interactions between its different phases. This workshop will focus on these interactions, with the goal of facilitating discussion between experts across domains in both theory and observations. To encourage conversation and collaboration, we will limit attendance to 40 people.

The main topics of this conference are:

  • The interaction between the hot, warm, and cold phases of the CGM
  • Observing and characterizing the hot phase of the CGM
  • Constraining the smallest and coldest structures in the CGM from observations
  • The impact of multiphase structure of the CGM on galaxy formation and evolution
  • Near-future instruments/surveys to probe the multi-phase CGM
  • Theoretical and numerical techniques designed to better model the CGM

A registration fee of $75 will cover coffee breaks, snacks, lunches, and the Thursday evening river cruise.



Wed, Aug 21, 2024 : 9am-5pm
Thurs, Aug 22, 2024 : 9am-5pm + River Cruise
Fri, Aug 23, 2024 : 9am-12pm

Program will be a mix of talks (10+5 minutes) and discussion sessions.


Confirmed Invited Speakers:

Sanch Borthakur (Arizona State)
Eric Koch (CfA | Harvard & Smithsonian)
Deborah Lokhorst (NRC Canada)
Nir Mandelker (Hebrew U of Jerusalem)
Dylan Nelson (ITA Heidelberg)
Sijing Shen (U Oslo)
Rob Simcoe (MIT)
Jessica Werk (U Washington)
John ZuHone (CfA | Harvard & Smithsonian)


Local Resources:


Distance to CfA


Sheraton Commander10 min walk16 Garden St Cambridge, MA 02138
Located in Harvard Square
Freepoint Hotel23 min walk220 Alewife Brook Pkwy, Cambridge, MA 02138
Cambria Hotel Boston/Somerville30 min walk515 Somerville Ave, Somerville, MA 02143
Porter Square Hotel18 min walk1924 Massachusetts Ave, Cambridge, MA 02140
Located in Porter Square
Hotel 186816 min walk1868 Massachusetts Ave, Cambridge, MA 02140
Located in Porter Square




AsmaraEthiopian/EritreanBest done in groups of 4-6. Make sure to get a bottle of the owner’s special honey wine!
DaliTapasCrowded, but delicious and worth every penny if you can get a reservation. If you go, make sure to try their Vieiras al Azafrán and Gambas al Ajillo. Head to Aeronaut Brewing Company afterward for drinks/live music/events.
Yume Wo KatareRamenOne of the few ramen shops in Massachusetts which make their own noodles. Be prepared to declare your dream at the end of the meal to the other diners in the restaurant. Stop by the nearby Honeycomb Creamery for locally-sourced ice cream for dessert
Veggie GalaxyVegan/Vegetarian DinerA retro 1950s-style style diner featuring an impressive variety of vegan & vegetarian comfort food. Little Donkey is nearby afterwards for drinks.
SumiaoChineseUpscale, spicy Chinese food and cocktails in East Cambridge. Toscanini’s ice cream is just a short walk away; try their unique and popular “B3” flavor.
Gyu-Kaku Japanese BBQJapanese BBQBest enjoyed with lots of friends (think 6-8) so you can order lots of different food! Wusong Road is a popular bar nearby celebrating Asian-American culture.
Painted BurroMexicanA nice sit down restaurant & tequila bar near Somerville.
Neptune OysterSeafoodOne of the few places in town which serve hot, delicious lobster rolls. Plenty of places serve cold lobster rolls. Alive and Kicking Lobsters is also an option, but they close strangely early (i.e. in the late afternoon).
Felipe’sMexicanGreat Mexican food in a bustling venue in Harvard Square. Notably, this is one of the few places in Cambridge that opens past 10 pm (they close at midnight).
Anna's TaqueriaMexicanA common Boston-area chain which features quick, tasty burritos/bowls.



L.A. BurdickFancy chocolate and coffee and pastries in Harvard Square and downtown.
PavementGood bagel sandwiches
Black SheepExcellent bagel sandwiches
TatteNice pastries
ZinnekensBelgian waffles



Lamplighter Brewing CompanyCozy, located between Harvard and MIT
Aeronaut Brewing CompanyBig space, also with pop-up food stands inside
Remnant BrewingLots of snacks and food, Gate Commes de Filles sells amazing chocolates next door.


Attendee List:

Jake BennettRongmon BordoloiSanchayeeta Borthakur
Christopher Carr
Hsiao-Wen ChenLiam ConnorCharlie Conroy
Amanda M. Cook
William CramerHitesh Kishore DasSanskriti DasAndrew Fox
Laya GhodsiJesse HanLars HernquistChris Howk
Ish KaulEric KochZuzanna Kocjan
Dhanesh Krishnarao
Ting-Wen LanErwin LauNicolas LehnerCassi Lochhaas
Deborah LokhorstScott LucchiniPriscilla Holguin Luna
Michael Messere
Nishant MishraSapna MishraDylan NelsonTheo O'Neill
Osase OmoruyiDaniel PiacitelliSam PonnadaJoseph Ribaudo
Manami RoySameerNatalie Nicole SanchezVadim Semenov
Sijing ShenEmily SilichRob SimcoeJonathan Stern
Ananya Goon TuliJason TumlinsonJessica WerkJohn ZuHone


S/LOC: Jake Bennett, Charlie Conroy, Jesse Han, Lars Hernquist, Cassi Lochhaas, Scott Lucchini, Theo O'Neill, Vadim Semenov