Recent efforts of Dana and assorted collaborators

• Determining Heating Rates in Reconnection Formed Flare Loops of the M8.0 Flare on 2005 May 13, W.-J. Liu, J. Qiu, D.W. Longcope, and A. Caspi, ApJ (in press)
• Calculating Separate Magnetic Free Energy Estimates for Active Regions Producing Multiple Flares: NOAA AR11158, L. Tarr, D.W. Longcope, and M. Millhouse, ApJ (in press)

• Consequences of spontaneous reconnection at a two-dimensional non-force-free current layer, J. Fuentes-Fernández, C.E. Parnell, A.W. Hood, E.R. Priest, and D.W. Longcope, Phys. Plasma 19 022901
• Understanding the Differences in Three Consecutive Large Flares, L. Tarr, and D. Longcope The Fifth Hinode Science Meeting, ASP Conference Series, 456, 61
• Predictions of Energy and Helicity in Four Major Eruptive Solar Flares, M.D. Kazachenko, R.C. Canfield, D.W. Longcope, and J. Qiu, Sol. Phys. 277 165-183
• Calculating Energy Storage Due to Topological Changes in Emerging Active Region NOAA AR 11112, L. Tarr, and D.W. Longcope, ApJ 749 64
• Heating of Flare Loops with Observationally Constrained Heating Functions, J. Qiu, W.-J. Liu, and D.W. Longcope, ApJ 752 124
• The Role of Fast Magnetosonic Waves in the Release and Conversion via Reconnection of Energy Stored by a Current Sheet, D.W. Longcope, and L. Tarr ApJ 756 192

• Density Enhancements and Voids Following Patchy Reconnection,, S.E. Guidoni and D.W. Longcope, ApJ 730 90
• Direct Measurements of Magnetic Twist in the Solar Corona , A. Malanushenko, M.H. Yusef and D.W. Longcope ApJ 736 97
• A Model for the Origin of High Density in Looptop X-Ray Sources, D.W. Longcope and S.E. Guidoni, ApJ 740 73

• Shocks and Thermal Conduction Fronts in Retracting Reconnected Flux Tubes , S.E. Guidoni and D.W. Longcope ApJ 718 1476-1490
• Slow Shocks and Conduction Fronts from Petschek Reconnection of Skewed Magnetic Fields: Two-fluid Effects , D. Longcope and S. Bradshaw ApJ 718 1491-1508
• Reconnection Outflows and Current Sheet Observed with Hinode/XRT in the 2008 April 9 "Cartwheel CME" Flare, S.L. Savage, D.E. McKenzie, K.K. Reeves, T.G. Forbes and D.W. Longcope, ApJ 722 329-345
• Sunspot Rotation, Flare Energetics, and Flux Rope Helicity: The Halloween Flare on 2003 October 28, M.D. Kazachenko, R.C. Canfield, D.W. Longcope and J. Qiu, ApJ 733 1539-1546
• A Quantitative Model of Energy Release and Heating by Time-dependent, Localized Reconnection in a Flare with Thermal Loop-top X-ray Source, D.W. Longcope, A.C. DesJardins, T. Carranza-Fulmer and J. Qiu, Sol Phys 267 107-139

• Reconstructing the Local Twist of Coronal Magnetic Fields and the Three-Dimensional Shape of the Field Lines from Coronal Loops in Extreme-Ultraviolet and X-Ray Images A. Malanushenko, D.W. Longcope, D.E. McKenzie, ApJ 707 1044-1063
  
• Coronal Loop Expansion Properties Explained Using Separators, J.E. Plowman, C.C. Kankelborg, and D.W. Longcope, ApJ 706 108-112
  
• Sunspot Rotation, Flare Energetics, and Flux Rope Helicity: The Eruptive Flare on 2005 May 13, M.D. Kazachenko, R.C. Canfield, D.W. Longcope, J. Qiu, A. Des Jardins, R.W. Nightingale, ApJ 704 1146-1158
  
• Additive Self-helicity as a Kink Mode Threshold, A. Malanushenko, D.W. Longcope, Y. Fan,and S.E. Gibson, ApJ 702 580-592
  
• Signatures of Magnetic Stress Prior to Three Solar Flares Observed by RHESSI, Angela Des Jardins , Richard Canfield, Dana Longcope, Emily McLinden, Amanda Dillman, ApJ 693 886-893
  
• Reconnection in Three Dimensions: The Role of Spines in Three Eruptive Flares, Angela Des Jardins, Richard Canfield, Dana Longcope, Crystal Fordyce, and Scott Waitukaitis, ApJ 693 1628-1636
  
• The Density of Coronal Null Points from Hinode and MDI, Dana Longcope, Clare Parnell and Craig DeForest, Proceedings of the Hinode-II Science meeting
  
• The Number Of Magnetic Null Points In The Quiet Sun Corona, D.W. Longcope and C.E. Parnell, Solar Physics 254, 51-75 (2009).
• Gas-dynamic shock heating of post-flare loops due to retraction following localized, impulsive reconnection , D.W. Longcope, S. Guidoni, and M.G. Linton, ApJ Lett 690, L18-L22 (2009).
• Effects of partitioning and extrapolation on the connectivity of potential magnetic fields, D.W. Longcope, G. Barnes, and C. Beveridge ApJ 693 97-111

• Defining and Calculating Self-Helicity in Coronal Magnetic Fields D.W. Longcope and A. Malanushenko, ApJ 674, 1130-1143 (2008)

• Fast magnetosonic waves launched by transient, current sheet reconnection D.W. Longcope and E. R. Priest, Phys. Plasmas 14, 122905-122905-11 (2007)
• Determining the Source of Coronal Helicity Through Measurements of Braiding and Spin Helicity Fluxes in Active Regions, D.W. Longcope, B. Ravindra and G. Barnes, ApJ 668, 571-585 (2007)
• A Quantitative, Topological Model of Reconnection and Flux Rope Formation in a Two-Ribbon Flare D.W. Longcope and C. Beveridge, ApJ 669, 621-635 (2007)
• Modeling and measuring the flux reconnected and ejected by the two-ribbon flare/CME event on 7 November 2004 D. Longcope, C. Beveridge, J. Qiu, B. Ravindra, G. Barnes and S. Dasso, Sol Phys. 244, 45-73 (2007).

• A Model for Patchy Reconnection in Three Dimensions, M.G. Linton and D.W. Longcope, ApJ, 642, 1177-1192 (2006)
• A hierarchical application of the Minimum Current Corona, C. Beveridge and D.W. Longcope, ApJ, 636, 453-461 (2006)

• Observations of separator reconnection to an emerging active region, D.W. Longcope, D. E. McKenzie, J. Cirtain and J. Scott, ApJ, 630, 596-614 (2005)
• Implementing a Magnetic Charge Topology Model for Solar Active Regions , G. Barnes, D.W. Longcope and K.D. Leka, ApJ 629, 561-571 (2005)
• Topological Methods for the Analysis of Solar Magnetic Fields (A Review) Dana Longcope, Living Reviews of Solar Physics, 2, 7 (2005)
• On Three-Dimensional Magnetic Skeleton Elements due to Discrete Flux Sources, C. Beveridge and D.W. Longcope,Solar Physics 227, 193-206 (2005)
• Coronal Heating at Separators and Separatrices E. R. Priest, D. W. Longcope, and J. Heyvaerts, ApJ 624, 1057-1071 (2005)
• Distribution of the magnetic flux in elements of the magnetic field in active regions, V.I. Abremenko and D.W. Longcope, ApJ 619, 1160-1166 (2005)

• Quantifying magnetic reconneciton and the heat it generates, D.W. Longcope, Proceedings of SOHO-15, p. 198
• Inferring a photospheric velocity field from a sequence of vector magnetograms: The Minimum Energy Fit , D.W. Longcope, ApJ 612, 1181-1192 [ PDF version]
• A comparison of the Minimum Current Corona to a magnetohydrodynamic simulation of quasi-static coronal evolution, D.W. Longcope and T. Magara, ApJ 608, 1106-1123
• Magnetic Helicity Propagation from Inside the Sun, Dana Longcope, Proceedings of IAU XXV JD3, Magnetic field and Helicity in the Sun and the Heliosphere

• Detection of a Taylor-like Plasma Relaxation Process in the Sun , Nandy, D., Hahn, M., Canfield, R.C., and Longcope, D.W., Astrophysical Journal Letters, 597, L73-L76
• A Viscoelastic Theory of Turbulent Fluid Permeated with Fibril Magnetic Fields , D.W. Longcope, T.C.B. McLeish and G.H. Fisher, Astrophysical Journal, 599 661-674 [ PostScript]
• Helicity Evolution in Emerging Active Regions , A.A. Pevtsov, V. Maleev, and D.W. Longcope, Astrophysical Journal, 593, 1217-1225 (2003)
• On the distribution of magnetic null points above the solar photosphere , D.W. Longcope, D.S. Brown and E.R. Priest, Physics of Plasmas, 10, 3321-3334 (2003)
• A model for elemental coronal flux loops, C. Beveridge, D.W. Longcope and E.R. Priest Solar Physics 216, 27-40.
• Magnetic helicity injection by horizontal flows int he quiet sun: I. Mutual helicity flux, B.T. Welsch and D.W. Longcope, Astrophysical Journal 588, 620-629 (2003).
• Injection of magnetic energy and magnetic helicity into the solar atmosphere by an emerging magnetic flux tube, T. Magara and D.W. Longcope, Astrophysical Journal, 586, 630-649 (2003).
• Helicity Transport and Generation in the Solar Convection Zone, D.W. Longcope and A.A. Pevtsov,  Advances in Space Research, 32, 1845-1853, Magnetic Helicity at the Sun, in Solar Wind and Magnetospheres, J. Buechner and  A.A. Pevtsov, Eds.  (2003)
• Nanoflare modeling of an X-ray bright point coronal loop, R. McMullen, D.W. Longcope and C. C. Kankelborg, in Multi-Wavelength Observations of Coronal Structure and Dynamics -- Yohkoh 10th Anniversary Meeting, COSPAR Colloquia Series, Volume TBD, P.C.H. Martens and D. Cauffman (eds.).

• A general theory of connectivity and current sheets in coronal magnetic fields anchored to discrete sources, D.W. Longcope and I. Klapper, Astrophysical Journal, 579, 468-481 (2002) [ PostScript]
• A three-dimensional dynamical model of current sheet formation in a coronal loop, D.W. Longcope and A.A Van Ballegooijen, Astrophysical Journal, 578, 573-589 (2002) [ PostScript]
• The orientational relaxation of bipolar active regions, Dana Longcope and Arnab Choudhuri, Solar Physics, 205, 63--92 (2002)

• Separator current sheets: Generic features in minimum-energy magnetic fields subject to flux constraints, D.W. Longcope, Physics of Plasmas, 8, 5277 (2001)
• Evidence of separator reconnection in a survey of X-ray bright points, D.W. Longcope, C.C. Kankelborg, J.L. Nelson and A.A. Pevtsov, Astrophysical Journal 553, 429--439 (2001).
• "Topology is destiny: Reconnection energetics in the corona", D. W. Longcope and C. C. Kankelborg, submitted to the Proceedings of The University of Tokyo Symposium in 2000 on Magnetic Reconnection in Space and Laboratory Plasmas, M. Hoshino, R. L. Stenzel, and K. Shibata, editors (2001)

• "A model for the emergence of a twisted magnetic flux tube", D. W. Longcope and B. T. Welsch, Astrophysical Journal 545, 1089-1100 (2000)
• "Self-organized criticality from separator reconnection in solar flares", D. W. Longcope and E. J. Noonan, Astrophysical Journal 542, 1088-1099 (2000).

• "Forward modeling of the coronal response to reconnection in an X-ray bright point ", C. C. Kankelborg and D. W. Longcope, Solar Physics 190, 59-77 (1999)
• "On magnetic reconnection in compact flares: How can the models apply to real flares?", D.W. Longcope, submitted to the proceedings of Explosive Phenomena in Solar and Space Plasmas
• "Coronal heating by collision and cancellation of magnetic elements", Longcope, D.W. and Kankelborg, C.C., Astrophysical Journal 524, 483-495 (1999)
• "Twisted flux tubes and how they get that way", Longcope, D.W., Linton, M.G., Pevtsov, A.A. Fisher, G.H. and Klapper, I., Magnetic Helicity in Space and Laboratory Plasmas, M. Brown, R. Canfield and A. Pevtsov eds. (1999).

• "Coronal heating in active regions as a function of global magnetic variables", Fisher, G.H., Longcope, D.W., Metcalf, T. R. and Pevtsov, A. A., Astrophysical Journal 508, 885-898 (1998).
• "A model for current sheets and reconnection in X-ray bright points", Longcope, D.W., Astrophysical Journal 507 433-442 (1998).
• "Flux tube twist resulting from helical turbulence: the Sigma-effect", Longcope, D.W., Fisher, G.H. and Pevtsov, A.A., Astrophysical Journal 507 417-432 (1998).
• "Topology and current ribbons: A model for current, reconnection and flaring in a complex, evolving corona", Longcope, D.W., Sol. Phys, 169, 91-121 (1996)