MMScience August 2014

mmscience@solar.physics.montana.edu

4 participants
7 discussions

New UKSP Nugget: 50. 3D Visualisation of the Eigenmodes of a Straight Magnetic Flux Tube
by Iain Hannah 28 Aug '14

28 Aug '14

50. 3D Visualisation of the Eigenmodes of a Straight Magnetic Flux Tube by Ioannis Giagkiozis, Viktor Fedun, Robertus Erdélyi, and Gary Verth (University of Sheffield) Online visualisations of MHD modes can aid solar physicists in interpreting imaging and spectroscopic data. http://www.uksolphys.org/?p=8413 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ UKSP Nuggets are published on a monthly basis highlighting solar physics research led from the UK. http://www.uksolphys.org/uksp-nuggets Iain Hannah and Lyndsay Fletcher ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr. Iain G. Hannah Royal Society Research Fellow, Astronomy & Astrophysics Group, SUPA School of Physics & Astronomy, Kelvin Building, University of Glasgow, Glasgow, UK, G12 8QQ Web: http://www.astro.gla.ac.uk/~iain/ Eml: iain.hannah(a)glasgow.ac.uk<mailto:iain.hannah@glasgow.ac.uk> Tel: +44 (0)141 330 6427 Fax: +44 (0)141 330 5183 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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RHESSI is operating normally following a successful anneal
by Shih, Albert Y. (GSFC-6710) 27 Aug '14

27 Aug '14

To RHESSI collaborators: On August 13, RHESSI resumed normal operations collecting solar X-ray and gamma-ray data, following the successful completion of the "anneal" procedure to rejuvenate the RHESSI detectors from the effects of radiation damage. The detectors were heated up from their operating temperature of ~120 K to ~100 deg C (373 K), held at that temperature for ten days, and then cooled back down. The entire procedure took seven weeks. Over the past two weeks, we have been evaluating the instrument performance and optimizing its settings. All nine detectors have recovered from the effects of radiation damage, providing hard X-ray (>~20 keV) imaging spectroscopy at the nominal angular resolution of ~2 arcsec and spectral resolution of ~1 keV. For soft X-ray (~3–20 keV) observations, five of the nine detectors can be used, which include the smallest and largest angular scales, but the other four detectors cannot be used at present because they are currently unable to electronically segment into separate front and rear volumes. The primary impact is a reduction in image quality below 20 keV. Such an outcome was expected, and these detectors may segment in the future. We now look forward to future solar activity. If you have any questions about this past anneal or the current status of the instrument, please feel free to contact me. Albert Shih RHESSI Deputy Mission Scientist ————— Albert Y. Shih Solar Physics Laboratory, Code 671 NASA Goddard Space Flight Center Greenbelt, MD 20771 Office: 301-286-1843

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Max Millennium News
by canfield＠mithra.physics.montana.edu 27 Aug '14

27 Aug '14

MAX MILLENNIUM NEWS 27 August 2014 CONTENTS 1. E-PRINTS POSTED IN THE PAST WEEK 2. FROM THE EDITOR ===================================================================== 1. E-PRINTS POSTED IN THE PAST WEEK ----------------------------------- > http://solar.physics.montana.edu/cgi-bin/eprint/default_page.pl Forward Modeling Transient Brightenings and Microflares around an Active Region Observed with Hi-C -- Adam R. Kobelski, David E. McKenzie Modeling Active Region Transient Brightenings Observed with X-Ray Telescope as Multi-stranded Loops -- Adam R. Kobelski, David E. McKenzie, Martin Donachie Source Regions of the Interplanetary Magnetic Field and Variability in Heavy-ion Elemental Composition in Gradual Solar Energetic Particle Events -- Ko, Yuan-Kuen; Tylka, Allan J.; Ng, Chee K.; Wang, Yi-Ming; Dietrich, William F. Simulating the in situ condensation process of solar prominences -- Chun Xia, Rony Keppens, Patrick Antolin, Oliver Porth 2. FROM THE EDITOR ------------------ The Max Millennium program exists to enhance all aspects of solar activity research. If you have news that is of broad interest to that community, feel free to send your message to the MMScience e-mail list: http://solar.physics.montana.edu/max_millennium/mmlists.shtml Address questions to canfield at physics.montana.edu

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Max Millennium News
by canfield＠mithra.physics.montana.edu 20 Aug '14

20 Aug '14

MAX MILLENNIUM NEWS 20 August 2014 CONTENTS 1. E-PRINTS POSTED IN THE PAST WEEK 2. FROM THE EDITOR ===================================================================== 1. E-PRINTS POSTED IN THE PAST WEEK ----------------------------------- > http://solar.physics.montana.edu/cgi-bin/eprint/default_page.pl A study of density modulation index in the inner heliospheric solar wind during solar cycle 23 -- Susanta Kumar Bisoi, P. Janardhan, M. Ingale, P. Subramanian, S. Ananthakrishnan, M. Tokumaru, and K. Fujiki ERRATUM: "Exact Analytical Solutions of Continuity Equation for Electron Beams Precipitating in Coulomb Collisions" -- Dobranskis R.R. and Zharkova V.V. Waiting time distribution of solar energetic particle events modeled with a non-stationary Poisson process -- Chuan Li, Sijia Zhong, Linghua Wang, Wei Su, and Cheng Fang 2. FROM THE EDITOR ------------------ The Max Millennium program exists to enhance all aspects of solar activity research. If you have news that is of broad interest to that community, feel free to send your message to the MMScience e-mail list: http://solar.physics.montana.edu/max_millennium/mmlists.shtml Address questions to canfield at physics.montana.edu

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Announcing a new RHESSI Science Nugget, No. 233
by Hugh Hudson 17 Aug '14

17 Aug '14

No. 233, "EUNIS Sees Pervasive Faint Fe XIX Emission: Evidence for Nanoflare Heating," by Jeff Brosius: faint emission at flare-like temperatures in a large coronal area. See http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI_Science_Nuggets listing the current series, 2008-present, and http://sprg.ssl.berkeley.edu/~tohban/nuggets/ for the original series, 2005-2008. We publish these at roughly two-week intervals and welcome contributions, which should be related, at least loosely, to RHESSI science.

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Announcing a new RHESSI Science Nugget, No. 232
by Hugh Hudson 11 Aug '14

11 Aug '14

No. 232, "Octupolar out-of-plane magnetic field structure generation during magnetic reconnection," by Jan Graf von der Pahlen and David Tsiklauri: A new characteristic marker of reconnection. See http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI_Science_Nuggets listing the current series, 2008-present, and http://sprg.ssl.berkeley.edu/~tohban/nuggets/ for the original series, 2005-2008. We publish these at roughly two-week intervals and welcome contributions, which should be related, at least loosely, to RHESSI science.

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Max Millennium News
by canfield＠mithra.physics.montana.edu 06 Aug '14

06 Aug '14

MAX MILLENNIUM NEWS 06 August 2014 CONTENTS 1. E-PRINTS POSTED IN THE PAST WEEK 2. FROM THE EDITOR ===================================================================== 1. E-PRINTS POSTED IN THE PAST WEEK ----------------------------------- > http://solar.physics.montana.edu/cgi-bin/eprint/default_page.pl Numerical simulations of impulsively generated Alfvén waves in solar magnetic arcades -- P. Chmielewski, K. Murawski, Z.E. Musielak, A.K. Srivastava A Flare Observed in Coronal, Transition Region and Helium I 10830 Emissions -- Zhicheng Zeng, Jiong Qiu, Wenda Cao, Philip G. Judge Quasi-periodic pulsations with varying period in multi-wavelength observations of an x-class flare -- Jing Huang, Baolin Tan, Yin Zhang, Marian Karlicky, and Hana Meszarosova Variations in Abundance Enhancements in Impulsive Solar Energetic-Particle Events and Related CMEs and Flares -- Donald V. Reames, Edward W. Cliver, and Stephen W. Kahler 2. FROM THE EDITOR ------------------ The Max Millennium program exists to enhance all aspects of solar activity research. If you have news that is of broad interest to that community, feel free to send your message to the MMScience e-mail list: http://solar.physics.montana.edu/max_millennium/mmlists.shtml Address questions to canfield at physics.montana.edu

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MMScience August 2014