Radio Stars: From kHz to THz (2017)

November 1–3, 2017
Westford, Massachusetts, USA

Radio Stars 2017 workshop poster

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 second “Radio Stars” workshop provides a forum for the presentation and discussion of the many advances in stellar and solar astrophysics enabled by the current 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 pre-main sequence through post-main sequence evolutionary phases. One underlying theme will be how new technologies that bring ever increasing sensitivity and angular resolution are opening increasing swaths of the electromagnetic spectrum to the studies of stars (“from kHz to THz”) are revolutionizing our understanding of stellar astrophysics in the process. We will also look toward the future to identify the needs and wishes of the stellar community for new radio facilities that are planned or underway.

Conference summary:

May 1, 2017: Registration and abstract submission open
July 14, 2017: Deadline for submission of abstracts for contributed talks
August 23, 2017: Full meeting program, including oral contributions announced
August 31, 2017: Deadline to apply for financial aid
October 2, 2017: Registration closes. Last day to secure special hotel rates. Deadline to sign up for workshop banquet.
October 15, 2017: Deadline for submission of poster abstracts.
November 1-3, 2017: The workshop.

Scientific Organizing Committee

  • Lynn Matthews (MIT Haystack Observatory, Chair)
  • Greg Hallinan (Caltech, USA)
  • Richard Ignace (East Tennessee State University, USA)
  • Karl Menten (MPIfR, Germany)
  • Michael Rupen (NRC, Canada)
  • Loránt Sjouwerman (NRAO, USA)
  • Stephan White (Air Force Research Laboratory, USA)

Local Organizing Committee

  • Heidi Johnson (MIT Haystack Observatory)
  • Nancy Wolfe Kotary (MIT Haystack Observatory)
  • Lynn Matthews (MIT Haystack Observatory)
  • Mary Reynolds (MIT Haystack Observatory)
  • Jason SooHoo (MIT Haystack Observatory)
Tomasz KaminskiCfAUSA
Lynn MatthewsMITUSA
Amy MioduszewskiNRAOUSA
Robert MutelUniversity of IowaUnited States
Deanne CoppejansNorthwestern UniversityUnited States
Nimesh A PatelHarvard-Smithsonian Center for AstrophysicsUSA
Ylva PihlstromUNMUnited States
Luis Henry Quiroga-NuñezLeiden Observatory / JIVENetherlands
Lorant SjouwermanNRAOUSA
Rachel OstenSTScIUSA
Gregg HallinanCaltechUSA
Jackie VilladsenNRAO CharlottesvilleUSA
Marin AndersonCaltechUnited States
A M S RichardsJBCA, University of ManchesterUK
Kazu AkiyamaMIT Haystack ObservatoryUSA
Bin ChenNew Jersey Institute of TechnologyUnited States
Hans OlofssonSpace, Earth and Environment, ChalmersSweden
Vladimir StrelnitskiMaria Mitchell ObservatoryU.S.A.
Farhad Yusef-ZadehNorthwestern UniversityUSA
Rebecca AzulayMax Planck Institute for Radio AstronomyGermany
Peter K. G. WilliamsHarvard-Smithsonian Center for AstrophysicsUSA
Christene LynchUniversity of Sydney/CAASTROAustralia
Andrew ZicThe University of SydneyAustralia
Grazia UmanaINAF-Osservatorio Astrofisico di CataniaItaly
Melodie KaoCaltechUSA
Rachael AinsworthJodrell Bank Centre for AstrophysicsUK
Ian StevensUniversity of BirminghamUK
Michael RupenNRC-CanadaCanada
Stephen WhiteAFRLUSA
Karl MentenMPI for Radio AstronomyGermany
Kathleen KraemerBoston CollegeUSA
Paul WithersBoston UniversityUSA
Jeffrey LinskyJILA/University of Colorado and NISTUSA
Robert KlementCHARA Array, Georgia State UniversityUSA
Colin LonsdaleMIT Haystack ObservatoryUSA
Jens KauffmannMIT HaystackUSA
Francesco CavallaroINAF-OACtItalia
Filomena BufanoINAF-Osservatorio Astrofisico di CataniaItaly
Matteo MunariINAF-Osservatorio Astrofisico di CataniaItaly
Holly AndrewsUniversity College LondonUK
Scott WolkHarvard-Smithsonian Center for AstrophysicsUSA
Sofia P MoschouHarvard Smithsonian Center for AstrophysicsUSA
Mark ReidHarvard-Smithsonian CfAUSA
Nancy R. EvansSAOUSA
Ken GayleyUniversity of IowaUnited States
Michel GuelinIRAMFrance
Richard IgnaceEast Tennessee State UniversityUSA
Albert ZijlstraUniversity of ManchesterUK
Danielle FenechUniversity College LondonUnited Kingdom
Laurent LoinardUniversidad Nacional Autonoma de MexicoMexico
Corrado TrigilioINAF-Osservatorio Astrofisico di CataniaItaly

Links to slides and audio from many of the Haystack “Radio Stars: from kHz to THz” workshop presentations (including posters) are available below.

Wednesday, November 1

I. Setting the Stage
Chair: Lynn Matthews
9:00-9:05 Welcome remarks – Colin Lonsdale
9:05-9:15 Opening remarks/logistics – Lynn Matthews
9:15-10:00 “An Overview of Stellar Radio Astronomy” (Invited) – Jeffrey Linsky (pdf)

II. Radio Emission from Young Stars
Chair: Peter Williams
10:00-10:30 “Radio Emission from Pre-Main Sequence Stars” (Invited) – Laurent Loinard (pdf) (audio)
10:50-11:10 “Update on the JVLA-Chandra Orion Project” – Scott Wolk (pdf)
11:10-11:30 “VLBI Astrometry on Binary Systems in the AB Doradus Moving Group” – Rebecca Azulay (pdf)
11:30-11:50 “Low Mass Young Stars at Metre Wavelengths” – Rachael Ainsworth (pdf) (audio)
11:50-12:10 “Unique Radio Stars: MWC 349A” – Vladimir Strelnitski (pdf)

III. Radio Emission from Hot Stars
Chair: Danielle Fenech
1:10-1:50 “Radio Emission from Massive Stars” (Invited) – Ian Stevens (pdf)
1:50-2:10 “Modeling the Radio Continuum Emissions of Massive Star Winds” – Richard Ignace (audio)
2:10-2:30 “Revealing the Structure of the Outer Disks of Be Stars” – Robert Klement (pdf) (audio)

IV. The Sun as a Radio Star
Chair: Rachel Osten
2:30-3:00 “Solar Radio Emission at High Frequencies” (Invited) – Bin Chen (pdf) (audio)
3:25-3:45 “Circular Polarization in Radio Emission from the Sun” – Stephen White (pdf)
3:45-4:05 “High Fidelity Solar Imaging with the Murchison Widefield Array” – Colin Lonsdale

V. Active Stars
Chair: Corrado Trigilio
4:05-4:25 “A Search for Thermal Gyrosynchrotron Emission from Hot Stellar Coronae” – Robert Mutel (pdf)
4:25-4:45 “Radio Emission Signatures from Next Generation Stellar Activity Simulations” – Sofia Paraskevi Moschou (pdf)
4:45-5:05 “Chasing Low Frequency Radio Bursts from Magnetically Active Stars” – Christene Lynch (pdf) (audio)

IV. Poster Previews
Chair: Richard Ignace
5:05-5:08 “Asymmetric Ejecta of Cool Hypergiants in the Massive Cluster Westerlund 1” – Holly Andrews (pdf) (audio)
5:08-5:11 “Should Radio Observations Detect Cepheids?” – Nancy Evans (pdf) (audio)
5:11-5:14 “The eMERLIN Legacy L-Band Cyg OB2 Radio Survey (COBRaS)” – Danielle Fenech (pdf) (audio)
5:14-5:17 “An ALMA 3mm Continuum Census of Westerlund 1” – Danielle Fenech (pdf)
5:17-5:20 “Simultaneity and Flux Bias between 43 and 86 GHz SiO Masers” – Lorant Sjouwerman (pdf)
5:20-5:23 “How Do Transiting Exoplanets Affect Observed Stellar Radio Emissions?” – Paul Withers (pdf) (audio)
5:23-5:28 “Studies of Bursty and Quiescent Emission of Two Ultra-Cool Dwarfs with the GMRT” – Andrew Zic (pdf)

Thursday, November 2

VI. Cool and Ultracool Dwarfs
Chair: Stephen White
9:00-9:30 “Radio Emission from Cool and Ultracool Dwarfs” (Invited) – Gregg Hallinan
9:30-9:50 “Spectroscopy and Imaging of Radio Bursts on Active M Dwarfs” – Jackie Villadsen (pdf)
9:50-10:10 “Jovian Magnetospheres Beyond the Solar System” – Peter Williams (pdf) (audio)
10:10-10:30 “Constraining Fully Convective Magnetic Dynamos Using Brown Dwarf Auroral Radio Emission” – Melodie Kao
10:30-11:00 “Extrasolar Space Weather” (Invited) – Rachel Osten (pdf) (audio)
11:30-11:50 “Monitoring Nearly 4000 Nearby Stellar Systems with the OVRO-LWA for Extrasolar Space Weather” – Marin Anderson

VII. Radio Stars as Denizens of the Galaxy
Chair: Loránt Sjouwerman
11:50-12:10 “High-Frequency Radio Emission from Stars within 2 pc of Sgr A*” – Farhad Yusef-Zadeh (pdf) (audio)
1:10-1:40 “Stellar Masers as Probes of the Galaxy” (Invited) – Ylva Pihlström (pdf) (audio)
1:40-2:00 “Characterizing Evolved Stars in the Inner Galaxy Using Radio and Optical Astrometric Measurements” – Luis Henry Quiroga-Nuñez

VIII. Radio Astrophysics Across the H-R Diagram
Chair: Loránt Sjouwerman
2:00-2:40 “Stellar Winds Across the H-R Diagram” (Invited) – Ken Gayley (pdf)
3:10-3:40 “The Role of VLBI in Stellar Radio Astronomy” (Invited) – Amy Mioduszewski (pdf) (audio)

IX. Radio Emission from Cool Evolved Stars
Chair: Tomasz Kamiński
3:40-4:00 “Super-Detailed Observations of Mass Loss from Red Supergiants and AGB Stars” – Anita Richards (pdf) (audio)
4:00-4:40 “Radio Observations of AGB Stars” (Invited) – Hans Olofsson (pdf) (audio)
4:40-5:00 “IRC+10216 in 3-D: Morphology of a TP-AGB Star Envelope” – Michel Guélin (pdf)

Friday, November 3

X. Radio Emission Beyond the Main Sequence
Chair: Amy Mioduszewski
9:00-9:40 “Post-AGB Stars and Planetary Nebulae” (Invited) – Albert Zijlstra (pdf) (audio)
9:40-10:00 “Spectral Line Surveys of Pre-Planetary and Planetary Nebulae with the Submillimeter Array” – Nimesh Patel
10:00-10:40 “White Dwarf Binaries” (Invited) – Deanne Coppejans (pdf) (audio)
11:10-11:30 “Tracing Rare Isotopes in Eruptive Stars” – Tomasz Kamiński
11:30-11:50 “New Developments in Radio Studies of Novae” – Michael Rupen (pdf)

XI. The Future of Stellar Radio Science
Chair: Michael Rupen
11:50-12:10 “The SCORPIO Project: Stellar Radio Emission in the SKA Era” – Grazia Umana
1:15-2:00 Discussion Forum – Moderators: Mark Reid, Michael Rupen, Anita Richards (pdf)


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