Contents of the Fermi Bubbles and Related Topics

Contents of the Fermi Bubbles and Related Topics

The Green Bank Observatory is hosting a workshop May 5th to May 7th 2025 on the Fermi Bubbles in honor of Jay Lockman’s 50+ years of service to NRAO/GBO. 

The Fermi Bubbles are a striking signature of the large-scale, multi-phase galactic outflow originating from the center of the Milky Way. Over the last 15 years, advancements in both observational techniques and theoretical models have greatly enhanced our understanding of this nuclear outflow. However, these developments have also unveiled new questions, highlighting the intricate nature of its formation, energy dynamics, and broader astrophysical significance. This Green Bank Workshop seeks to bring together researchers studying the Fermi Bubbles and nuclear outflows, emphasizing both observational discoveries and theoretical insights. Discussions will cover the latest multi-wavelength observations of the multi-phase nuclear wind of the Milky Way, as well as the most recent theories on its formation and evolution. The conference will also explore local analogues in the Universe, fostering collaboration across disciplines.

The Workshop will be held at the Green Bank Observatory, where the great natural beauty and intimate setting produce meetings characterized by a high level of interaction. Because of logistical considerations, attendance will be limited to approximately 45 participants. Regular registration closed March 28, 2025, and our available spaces have filled up. Reach out to David Frayer (LOC, email bottom of page) if you do research in this field and are interested in attending.

Lodging

Lodging will be at the Observatory or nearby locations. All meals will be served in the Observatory Cafeteria. The cost for meals and lodging for the three day conference will be $325 for on-site lodging and approximately $475 for off-site lodging. It may be possible to waive some of the costs for some of the participants. As of the end of March, on-site lodging has filled up.

Travel Information

The easiest way to get here is to follow the directions on our “Getting Here” page. Please note that some GPS systems do not always give the best route to the Green Bank Observatory, and nothing beats the good old-fashioned paper map for navigation.

We plan to provide a bus/van shuttle from Dulles at 2pm on Sunday May 04 and returning from Green Bank to Dulles on Wednesday May 07 after the conference (leaving Green Bank around 1pm; the trip from Green Bank to Dulles is 3.5-4hrs). We will coordinate ride-sharing from area airports if there is interest.

Workshop Schedule

Day 1 — Monday, 5 May

TimeDuration (Min)SpeakerTopic
09:00 – 09:1515Welcome: GBO Director and LOC
09:15 – 09:4530Celebration of Jay Lockman’s contributions to astronomy
Session I. Chair: A. Fox
09:45 – 10:1530Kartick C. SarkarFormation models for the Fermi Bubbles
10:15 – 10:4530Stefan GillessenThe infrared-view of the Galactic Center
10:45 – 11:1530Coffee break
11:15 – 11:4530Dmitry MalyshevGamma-ray emission in the GC
11:45 – 12:0520Ruth DalyNew Black Hole Spin Values for Sagittarius A* Obtained with the Outflow Method
12:05 – 12:2520Gerald CecilAssessing ISM/jet Interactions at pc radii in the MW
12:30 – 13:3060Lunch break
Session II. Chair: E. Di Teodoro
13:30 – 14:0030Gabriele PontiThe hot phase of the Galactic outflow
14:00 – 14:3030Hsiang-Yi Karen YangUnveiling the origin of the Fermi/eROSITA bubbles and the microwave haze
14:30 – 14:5020Heshou ZhangA magnetized halo of the Milky Way from inner Galaxy outflows
14:50 – 15:2030Coffee break
15:20 – 15:5030Rongmon BordoloiUV absorptions in the Fermi Bubbles
15:50 – 16:1020Andy FoxGalaxy-scale Feedback in the Milky Way
16:10 – 16:3020Robert BenjaminIonized Gas in the Direction of the Fermi Bubble
16:30 – 18:0090Time for collaborative work
18:00 – 19:0060Dinner
from 19:00∞Drinks and discussions in Drake Lounge

Day 2 — Tuesday, 6 May

TimeDuration (Min)SpeakerTopic
Session III. Chair: H.Y. Yang
09:00 – 09:3030Enrico Di TeodoroUnveiling the cold outflow from the nucleus of the Milky Way
09:30 – 10:0030Francie CashmanAbsorption-Line Studies of Molecular Gas in the Fermi Bubbles
10:00 – 10:2020Qingzheng YuHidden HI Clouds in the Milky Way Wind
10:20 – 10:4020Karlie NoonDark gas in the Milky Way’s nuclear outflows
10:40 – 11:1030Coffee break
11:10 – 11:4030Robin TressUnraveling Star Formation in the Galactic Center
11:40 – 12:1030Evan ScannapiecoCold Gas in Galactic Outflows
12:10 – 12:2515Poster sessions
12:30 – 13:1545Lunch break
13:15 – 15:00105GBT Telescope Tour
Session IV. Chair: M. Busch
15:00 – 15:2020Jay LockmanKinematics of Neutral Clouds in the Nuclear Outflow
15:20 – 15:4020Andrea AfruniModeling the multiphase wind at the base of the Fermi Bubbles
15:40 – 16:1030Coffee break
16:30 – 17:0030Sylvain VeilleuxFermi-like Bubbles in External Galaxies
17:00 – 17:3030Justin SpilkerCold and Warm Outflows at High Redshifts
17:30 – 17:5020Timothy HeckmanRadio Jets and the Quenching of Star-Formation in Massive Galaxies
18:00 – 19:0060Dinner in the Science Center
19:00 – 20:0060Panel discussion in Science Center Auditorium
from 20:00∞Drinks and discussions in Drake Lounge

Day 3 — Wednesday, 7 May

TimeDuration (Min)SpeakerTopic
Session V. Chair:
09:00 – 09:3030Annalisa PillepichX-ray bubbles in the circumgalactic medium of simulated Milky Way-like galaxies, and beyond
09:30 – 10:0030Nicola LocatelliThe hot gas phase of the Milky Way as seen by eROSITA
10:00 – 10:2020Nicolas PeschkenCosmic Ray driven outflows in Milky Way-like galaxies
10:20 – 10:4020Lisiyuan YangIon densities of cold clouds driven by galactic outflows
10:40 – 11:1030Coffee break
11:10 – 11:4030Eugene ChurazovThe North Polar Spur and The Sphinx by Edgar Allan Poe
11:40 – 12:3050Final summary and discussion

Scientific Organizing Committee

  • Andrew Fox
  • Daniel McCammon
  • Robert Benjamin
  • Daniel Wang
  • Naomi McClure-Griffiths
  • Michael Busch
  • Mark Heyer
  • Erico Di Teodoro – Chair
  • H.-Y. Karen Yang

Invited Speakers (14)

  • Francie Cashman (Presbyterian College)
  • Kartick Sarkar (Raman Research Institute)
  • Robin Tress (EPFL)
  • Sylvain Veilleux (University of Maryland)
  • Justin Spilker (Texas A&M University)
  • Gabriele Ponti (INAF – Brera)
  • Stefan Gillessen (MPE)
  • Rongmon Bordoloi (North Carolina State University)
  • H.-Y. Karen Yang (National Tsing Hua University)
  • Evan Scannapieco (Arizona State University)
  • Nicola Locatelli (INAF – OAB)
  • Annalisa Pillepich (Max Planck Institute for Astronomy)
  • Dmitry Malyshev (Erlangen Centre for Astroparticle Physics)
  • Eugene Churazov (MPA, Garching)

Additional Participants (35)

  • Andy Fox (STSCI)
  • Nicolas Peschken (University of Florence)
  • Andrea Afruni (University of Florence)
  • Robert Benjamin (University of Wisconsin-Whitewater)
  • Qingzheng Yu (University of Florence)
  • Karlie Noon (Australian National University)
  • Ruth Daly (Penn State Berks Campus)
  • Dan McCammon (University of Wisconsin-Madison)
  • Lisiyuan Yang (UMass Amherst)
  • David Frayer (Green Bank Observatory/NRAO)
  • Jay Lockman (Green Bank Observatory/NRAO)
  • Patrick Ogle (STSCI)
  • Enrico Di Teodoro (University of Florence)
  • Heshou Zhang (INAF)
  • Jael Rojas (INAOE)
  • Daniel Bautista (NRAO/GBO)
  • Timothy Heckman (John Hopkins University)
  • Glen Langston (NSF)
  • Toney Minter (NRAO/GBO)
  • Glenn White (STFC and Open University)
  • Gerald Cecil (University of North Carolina)
  • Ron Maddalena (NRAO/GBO)
  • Daysi Quinatoa (Observatorio Astronomica de Quito)
  • Michael Busch (Univ of California, San Diego)
  • Allanur Ansari (Washburn University of Topeka)
  • Riley Dunnagan (Green Bank Observatory/NRAO)
  • Tony Beasley (NRAO)
  • Natalie Butterfield (NRAO)
  • Michael Rugel (NRAO)
  • Elisa Lentini (INAF)
  • Karen O’Neil (GBO/NRAO)
  • Jennifer Meyer (NRAO)
  • Kim Emig (NRAO)
  • Larry Morgan (GBO/NRAO)
  • Paul Vosteen (GBO/NRAO)

Local Organizing Committee

Green Bank Observatory

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