Radio Stars and Their Lives in the Galaxy (2012)

October 3–5, 2012
Westford, Massachusetts, USA

Detectable radio emission arises from stars across the entire H-R diagram, spanning virtually every stage of stellar evolution. The origin of stellar radio emission stems from a wide variety of physical processes, and observations of stars at radio wavelengths probe a broad range of astrophysical phenomena that cannot be studied by any other means.

This workshop will provide a forum for the presentation and discussion of the many advances in stellar and solar astrophysics recently (or soon to be) enabled by the latest generation of state-of-the-art radio facilities operating from meter to submillimeter wavelengths. We seek to bring together both observers and theorists to stimulate a lively exchange of ideas on how radio wavelength observations can provide new and unique insights into the workings of stars.

The workshop will focus on both hot and cool stars spanning the main sequence through post-main sequence evolutionary phases. We will also explore radio stars as probes of the Galaxy and the Galactic “ecosystem.”

Invited review topics will include:

  • An overview of stellar radio astronomy
  • Radio emission at the bottom of the Main Sequence
  • The Sun as a radio star
  • The time domain in stellar physics
  • Stellar wind theory
  • The role of magnetic fields in stellar evolution
  • Radio emission from evolved stars
  • Circumstellar masers (theory and observation)
  • Circumstellar chemistry
  • White dwarf binaries
  • Radio stars as players in our Galaxy
  • Supernova progenitors
  • Outlooks, controversies, and future challenges

Conference summary

May 2, 2012: Pre-registration and abstract submission open
June 1, 2012: Registration opens
June 15, 2012: Deadline for submission of abstracts for contributed talks
July 16, 2012: E-mail notifications regarding abstracts selected for oral contributions
August 24, 2012: Deadline to apply for financial aid
September 2, 2012: Registration deadline. Last day to secure special conference hotel rate at Hawthorn Suites
Deadline to sign up for workshop banquet.
September 15, 2012: Deadline for poster abstract submission
October 35 , 2012: The workshop

Scientific Organizing Committee

  • Lynn Matthews (MIT Haystack, Chair)
  • Elizabeth Humphreys (ESO)
  • Karl Menten (Bonn)
  • Nimesh Patel (CfA)
  • Michael Rupen (NRAO)

Local Organizing Committee

  • Heidi Johnson (MIT Haystack Observatory)
  • Lynn Matthews (MIT Haystack Observatory)
  • K.T. Paul (MIT Haystack Observatory)
  • Jason SooHoo (MIT Haystack Observatory)

Rachael Ainsworth (Dublin Institute for Advanced Studies, Ireland)
Nikta Amiri (University of Colorado Boulder, USA)
Tim Bastian (NRAO, USA)
Yoon Kyung Choi (Max-Planck-Institut fuer Radioastronomie, Germany)
Laura Chomiuk (Michigan State University/National Radio Astronomy Observatory, USA)
Mark J Claussen (National Radio Astronomy Observatory, USA)
Steven R. Cranmer (Harvard-Smithsonian CfA, USA)
Shuji Deguchi (Nobeyama Radio Observatory, Japan)
Elvire De Beck (Max-Planck-Institute fuer Radiaoastronomie, Germany)
Shep Doeleman (MIT Haystack Observatory, USA)
Gerry Doyle (Armagh Observatory, N. Ireland)
Nancy R. Evans (Smithsonian Astrophysical Observatory, USA)
Vincent Fish (MIT Haystack Observatory, USA)
Ioannis Gonidakis (CSIRO Astronomy and Space Science, Australia)
Manuel Guedel (University of Vienna, Switzerland)
Gregg Hallinan (California Institute of Technology, USA)
Richard Ignace (East Tennessee State University, USA)
Tomasz Kaminski (Max-Planck-Institute fuer Radiaoastronomie, Germany)
Vinay Kashyap (Smithsonian Astrophysical Observatory, USA)
Sun Kwok (The University of Hong Kong, China)
Thibaut Le Bertre (CNRS, France)
Colin Lonsdale (MIT Haystack Observatory, USA)
Rusen Lu (MIT Haystack Observatory, USA)
Matthias Maercker (ESO/AIfA, Germany)
Lynn D. Matthews (MIT Haystack Observatory, USA)
Gordon McIntosh (University of Minnesota-Morris, USA)
Carl Melis (University of California, San Diego, USA)
Karl Menten (MPI fuer Radioastronomie, Germany)
Amy Mioduszewski (NRAO, USA)
Divya Oberoi (National Centre for Radio Astrophysics, TIFR, India)
Eamon O’Gorman (Trinity College Dublin, Ireland)
Rachel Osten (Space Telescope Science Institute)
Jennifer Posson-Brown (Harvard-Smithsonian CfA, USA)
Mark Reid (Harvard-Smithsonian CfA, USA)
Anita M S Richards (UK ARC Node, JBCA, University of Manchester, UK)
Maria del Mar Rubio-Diez (Centro de astrobiologia INTA-CSIC, Spain)
Michael Rupen (NRAO, USA)
Raghvendra Sahai (Jet Propulsion Laboratory, USA)
Lorant Sjouwerman (NRAO, USA)
Jeno Sokoloski (Columbia University, USA)
Vladimir Strelnitski (Maria Mitchell Observatory, USA)
Daniel Tafoya (Onsala Space Observatory, Sweden)
Wouter Vlemmings (Onsala Space Observatory, Sweden)
Stephen White (Air Force Research Lab, USA)
Peter K. G. Williams (Harvard, USA)
Scott J. Wolk (Harvard-Smithsonian Center for Astrophysics, USA)
Ken Young (Center for Astrophysics, USA)
Bo Zhang (MPIfR, Germany)
Xingwu Zheng (Najing University, China)
Rachel Zizza (Wellesley College, USA)

Links to slides and audio from many of the Haystack “Radio Stars and Their Lives in the Galaxy” workshop oral presentations are available below. Select poster presentations are also available below.

Wednesday, October 3

9:30-9:40 Welcome address – Colin Lonsdale
9:40-9:50 Opening remarks/logistics – Lynn Matthews

I. An Overview of Stellar Radio Astronomy
Chair: Jeno Sokoloski
9:50-10:30 “An Introduction to Stellar Radio Astronomy” (review) – Manuel Guedel (pdf)

II. Radio Emission from Pre-Main Sequence Stars
10:30-10:50 “Radio Continuum Observations of Low-Mass Young Stars Driving Jets” – Rachael Ainsworth (pdf) (audio)
10:50-11:10 COFFEE/POSTERS
Chair: Vinay Kashyap
11:10-11:30 “The Radio/X-ray Connection in Young Stellar Objects in the Orion Nebula Cluster” – Scott Wolk (pdf) (audio)

III. Radio Emission on the Main Sequence
11:30-12:00 “Radio Emission at the Bottom of the Main Sequence” (review) – Gregg Hallinan
12:00-1:00 LUNCH
Chair: Gerry Doyle
1:00-1:20 “The Pleiades Distance Controversy and Radio Emission from Young to Intermediate-Age Sun-like Main Sequence Stars” – Carl Melis (pdf) (audio)
1:20-2:00 “The Sun as a Ra
dio Star” (review) – Stephen White (pdf) (audio)
2:00-2:20 “Imaging the Sun with the Murchison Widefield Array” – Divya Oberoi (pdf) (audio)
2:20-2:50 “The Time Domain in Stellar Radio Astronomy” (review) – Rachel Osten (pdf)
Chair: Rico Ignace
3:10-3:50 “Stellar Wind Theory” (review) – Steven Cranmer (pdf) (audio)

IV. Post Main Sequence Stars
3:50-4:10 “Wind Properties and Clumping” – Anita Richards (pdf) (audio)
4:10-4:30 “Probing the Thermodynamics of Red Giant Mass Outflows with the JVLA” – Eamon O’Gorman (pdf)

Thursday, October 4

IV. Post-Main Sequence Radio Stars (continued)
Chair: Mark Reid
9:00-9:40 “The Extraordinary Deaths of Ordinary Stars” (review) – Raghvendra Sahai
9:40-10:00 “Unwinding the Secrets of Thermal Pulses and Sculpted Winds in AGB Stars with ALMA” – Matthias Maercker (pdf) (audio)
10:00-10:30 “New Developments in Maser Theory” (review) – Vladimir Strelnitski (pdf)
10:30-11:00 COFFEE/POSTERS
Chair: Lorant Sjouwerman
11:00-11:30 “Stellar Masers: An Observational Perspective” (review) – Shuji Deguchi (pdf) (audio)
11:30-11:50 “The Distance and Size of NML Cyg from VLBA and VLA Astrometry” – Bo Zhang
11:50-12:10 “VLBI Maser Observations of OH 231.8+4.2: Parallax and Proper Motion” – Yoon Kyung Choi
12:10-1:15 LUNCH
Chair: Anita Richards
1:15-1:55 “Circumstellar Chemistry” (review) – Karl Menten (pdf)
1:55-2:15 “A Molecular Line Imaging Survey of IRC+10216 using the Very Large Array” – Mark Claussen
2:15-2:35 “High Resolution Mapping of the Narrow Spectral Lines in IRC+10216” – Ken Young (pdf) (audio)
2:35-2:55 “An Unbiased View of the Molecular Line Emission from the Red Supergiant VY CMa over the 279-355 GHz Range” – Tomasz Kaminski
Chair: Mark Claussen
3:15-3:35 “An Imaging Line Survey of the Oxygen-Rich AGB Star IK Tau with the Submillimeter Array” – Elvire De Beck
3:35-3:55 “Magnetic Fields of AGB Stars” – Wouter Vlemmings
3:55-4:15 “VLBA SiO Maser Observations of the OH/IR Star OH 44.8-2.3: Magnetic Field and Morphology” – Nikta Amiri (pdf) (audio)
4:15-4:35 “The 21-cm Atomic Hydrogen Line in Cool Stars” – Thibaut Le Bertre (pdf) (audio)
4:35-4:55 “Mass-Losing Stars and Their Environments as Traced by the HI 21-cm Line” – Lynn Matthews (pdf)

Friday, October 5

III. Radio Emission on the Main Sequence (Part 2)
Chair: Amy Mioduszewski
9:00-9:20 “Coherent Radio Bursts from the Sun and Stars: Recent Explorations” – Tim Bastian

V. Stellar Remnants
9:20-10:00 “White Dwarf Binaries” (review) – Jeno Sokoloski
10:00-10:30 COFFEE/POSTERS
Chair: Carl Melis
10:30-10:50 “Gamma-Ray Novae – A Radio Perspective” – Michael Rupen
10:50-11:20 “Supernova Progenitors” (review) – Laura Chomiuk (pdf) (audio)

VI. Radio Stars as Players in Our Galaxy
11:20-11:40 “Faraday Rotation in and around Stellar Bubbles” – Richard Ignace (pdf) (audio)
11:40-12:45 LUNCH
Chair: Tim Bastian
12:45-1:15 “Radio Stars as Probes of the Galaxy” (review) – Mark Reid (pdf) (audio)

VII. Summary and Perspectives
1:15-2:00 “Outlooks and Future Challenges in Stellar Radio Astronomy” (review) – Sun Kwok (pdf)
2:00-2:30 Closing discussions – Tim Bastian, moderator (audio)


“Project Tanagra: A Spectro-Temporal Stellar Database” – Jennifer Posson-Brown (pdf)
“The Velocity Range of Mira’s SiO Maser Emission” – Gordon McIntosh (pdf)
“The Large Scale Environment of Betelgeuse from Radio Observations” – Thibaut Le Bertre (pdf)

Radio Stars 2012 conference group photo


NSF logo

We gratefully acknowledge support for the Radio Stars workshop through a grant from the National Science Foundation.