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Current Issue Preview New Issue Past Issues Jobs Job Listings PhD Listings Meetings Useful Resources Submit News Subscribe Select Page SolarNews The Electronic Newsletter of the AAS Solar Physics Division Volume 2024 Number 09 – 01 May 2024 Sherry Chhabra, SolarNews Editor ( solarnews.editor@aas.org ) CHAIR’S CHAT AAS Agents and SPD Certificate of Appreciation Posted by: Nicki Viall AAS Agents Did you know that the AAS has a AAS Agents program to improve communication between the Society and its members? Everyone should have one, either at their institution or neighboring institution. To learn more about the program and to connect with your local AAS agent, please see the list of agents here: https://aas.org/agents/roster- aas-agents SPD Certificate of Appreciation to Dr. Gordon Emslie I am pleased to announce that at the annual Solar Physics Division Business (members) meeting on April 11th, 2024, Dr. Gordon Emslie was awarded an SPD Certificate of Appreciation. SPD Certificates of Appreciation are given for exceptional contributions in a managerial or other non-technical role that significantly advance the discipline of solar physics. The SPD Certificate of Appreciation goes to Dr. Gordon Emslie for significantly advancing the discipline of solar physics through: managing for 40 years the SPD Studentship Program, including sponsorship of over 300 student attendees at scientific meetings; establishing and nurturing for over 20 years the annual SPD Student Poster Contest to encourage and recognize excellence in science presentation; and managing and advancing the essential element of Public Policy advocacy for the Division for over a decade, including critical work in achieving legislative recognition for the importance of solar physics via the PROSWIFT Act. SCIENCE HIGHLIGHTS Living Reviews in Solar Physics – Major Review Article on Stellar flares” Posted by: Frank Schulz The open-access journal Living Reviews in Solar Physics has published a new review article on April 24, 2024: Adam F. Kowalski. Stellar flares. Living Rev Sol Phys 21, 1 (2024). https://doi.org/10.1007/s41116-024-00039-4 Abstract: Magnetic storms on stars manifest as remarkable, randomly occurring changes of the luminosity over durations that are tiny in comparison to the normal evolution of stars. These stellar flares are bursts of electromagnetic radiation from X-ray to radio wavelengths, and they occur on most stars with outer convection zones. They are analogous to the events on the Sun known as solar flares, which impact our everyday life and modern technological society. Stellar flares, however, can attain much greater energies than those on the Sun. Despite this, we think that these phenomena are rather similar in origin to solar flares, which result from a catastrophic conversion of latent magnetic field energy into atmospheric heating within a region that is relatively small in comparison to normal stellar sizes. We review the last several decades of stellar flare research. We summarize multi-wavelength observational results and the associated thermal and nonthermal processes in flaring stellar atmospheres. Static and hydrodynamic models are reviewed with an emphasis on recent progress in radiation-hydrodynamics and the physical diagnostics in flare spectra. Thanks to their effects on the space weather of exoplanetary systems (and thus in our search for life elsewhere in the universe) and their preponderance in Kepler mission data, white-light stellar flares have re-emerged in the last decade as a widely-impactful area of study within astrophysics. Yet, there is still much we do not understand, both empirically and theoretically, about the spectrum of flare radiation, its origin, and its time evolution. We conclude with several big-picture questions that are fundamental in our pursuit toward a greater understanding of these enigmatic stellar phenomena and, by extension, those on the Sun. Recent RHESSI Science Nuggets Posted by: Hugh Hudson No. 466, Unexpected Asymmetry in GeV Emission,” by Bruno ARSIOLI and Elena ORLANDO. The high-energy solar gamma radiation shows inexplicable but fascinating properties. No. 467, Sun-as-a-star Analysis of the M8.7 Flare 0n 2022 October 2 Using H-alpha and EUV Spectra Taken by SMART/SDDI and SDOEVE,” by Takato OTSU. Whole-Sun spectroscopic observations can readily detect ejecta. No. 468, Is there HOPE for Hyder flares?” by Hugh HUDSON. Filament eruptions/Hyder flares/disparitions brusques may all show Hot Onset Precursor Events. We welcome almost any contribution to the RHESSI Nuggets. The topic may wander some distance away from specifically RHESSI results if it is generally interesting. See https://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI_Science_Nuggets for these and others. Comments about specific flares can often be found by searching for their SOLyyyy-mm-dd identifier from this home page. GENERAL NEWS DKIST Early Cycle 3: Proposal Planning Posted by: Alexandra Tritschler The DKIST is pleased to share the following information to assist with early proposal planning for Cycle 3 during its Operations Commissioning Phase. Key dates for Cycle 3 : Release of Cycle 3 Proposal Call and Proposal Tool: 15 May, 2024, 07:00 GMT. Opening of submission window: 15 May 2024, 07:00 GMT. Closing of submission window (Proposal submission deadline): 12 June 2024, 23:00 GMT. Anticipated Execution Window (observing): February 2025 – November 2025. For observing capabilities, science priorities and other details please visit the full Pre-Announcement : https://nso.atlassian.net/wiki/spaces/PDOI/pages/2632089601 If you have any questions at this point, please contact us on the Help Desk: https://nso.atlassian.net/servicedesk/customer/portals SCOSTEP/PRESTO Newsletter APR. 2024 (vol.39) Posted by: Kazuo Shiokawa SCOSTEP/PRESTO Newsletter volume 39 (APR 2024) has now been published. The PDF file is available at https://scostep.org/resources/scostep-presto-newsletter-archive/ Below are the contents of this volume. ——————————————– Contents of SCOSTEP/PRESTO Newsletter APR. 2024 (Vol.39) 1. An Investigation of Properties of the Coronal Holes Producing HSSs – InProCH 2. STP (Solar Terrestrial Physics) activities in Senegal (Space Weather and GNSS) 1. Akshay Patil / India 2. Chandan Kapil / India 1. Geomagnetic influence on climate at the Earth 2. The International Space Weather Initiative School 3. The AGS International Conference on Space Weather and Technology Applications 1. 2024 awardees of the SCOSTEP Visiting Scholar (SVS) program 2. Meetings and database constructions supported by the PRESTO grant 2024 3. SCOSTEP’s Next Scientific Program Committee ——————————————– AGENCY NEWS HPAC Nominations Posted by: Janet Kozyra Heliophysics Advisory Committee – Member nominations due June 30, 2024 The NASA Heliophysics Division seeks community members to serve on the Heliophysics Advisory Committee (HPAC), the Federal Advisory Committee that advises NASA on Heliophysics science. The HPAC draws on the expertise of its members to provide advice and make recommendations to the Heliophysics Division Director, Science Mission Directorate, NASA Headquarters on Heliophysics programs, policies, plans, and priorities. The HPAC’s recommendations and analysis can be used to inform decisions on the programmatic scope and priorities, as well as the implementation of Heliophysics programs. In addition, the HPAC will provide a regular forum for broad discussions of Heliophysics and the role of Heliophysics within and outside of NASA. NASA Heliophysics Division openly solicits nominations of individuals who are affiliated with U.S. institutions for membership on the HPAC. U.S. citizens may submit self-nominations for consideration to fill vacancies on the committee. There will be member vacancies from time to time throughout the year, and NASA will consider self-nominations to fill such intermittent vacancies. Nominees will be contacted only if a vacancy should arise,...