Topics:
Current
Sheets & Reconnection
- Signatures
of Magnetic Stress Prior to Three Solar Flares Observed by RHESSI, Angela
Des Jardins , Richard Canfield, Dana Longcope, Emily McLinden, Amanda Dillman,
ApJ (in press)
- 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 (in press)
- Fast
magnetosonic waves launched by transient, current sheet reconnection
D.W. Longcope and E. R. Priest, Phys. Plasmas 14, 122905-122905-11
(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).
- Observations
of separator reconnection to an emerging active region, D.W. Longcope,
D. E. McKenzie, J. Cirtain and J. Scott, ApJ, (submitted)
- Coronal
Heating at Separators and Separatrices E. R. Priest, D. W. Longcope,
and J. Heyvaerts, ApJ (in press)
- Quantifying
magnetic reconneciton and the heat it generates, D.W. Longcope, Proceedings
of SOHO-15, p. 198.
- 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
- 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]
- 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)
- "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)
- "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).
- "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)
Coronal Field Topology
- The Density of Coronal Null
Points from Hinode and MDI, Dana Longcope, Clare Parnell and Craig DeForest,
Proceedings of the Hinode-II Science meeting (submitted).
- The Number Of Magnetic Null
Points In The Quiet Sun Corona, D.W. Longcope and C.E. Parnell, Solar
Physics 254, 51-75 (2009).
- Implementing
a Magnetic Charge Topology Model for Solar Active Regions , G. Barnes,
D.W. Longcope and K.D. Leka, ApJ (in press)
- Topological
Methods for the Analysis of Solar Magnetic Fields (A Review) Dana Longcope,
Living Reviews of Solar Physics (submitted)
- On
Three-Dimensional Magnetic Skeleton Elements due to Discrete Flux Sources,
C. Beveridge and D.W. Longcope,Solar Physics (in press)
- 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.
- 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]
- "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)
Flux Tubes &
Helicity
- Defining
and Calculating Self-Helicity in Coronal Magnetic Fields D.W. Longcope
and A. Malanushenko, ApJ 674, 1130-1143 (2008)
- 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)
- Inferring
a photospheric velocity field from a sequence of vector magnetograms: The
Minimum Energy Fit , D.W. Longcope, ApJ, (in press) [ PDF version]
- Magnetic
Helicity Propagation from Inside the Sun, Dana Longcope, Proceedings
of IAU XXV JD3, Magnetic field and Helicity in the Sun and the Heliosphere
(in press)
- 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)
- 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)
- The orientational
relaxation of bipolar active regions, Dana Longcope and Arnab Choudhuri,
Solar Physics, 205, 63--92 (2002)
- "A model
for the emergence of a twisted magnetic flux tube", D. W. Longcope and
B. T. Welsch, Astrophysical Journal 545, 1089-1100 (2000)
- "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).
- "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).
Flux Emergence
- Observations
of separator reconnection to an emerging active region, D.W. Longcope,
D. E. McKenzie, J. Cirtain and J. Scott, ApJ, (submitted) [ PDF version]
- Magnetic
Helicity Propagation from Inside the Sun, Dana Longcope, Proceedings
of IAU XXV JD3, Magnetic field and Helicity in the Sun and the Heliosphere
(in press)
- Helicity
Evolution in Emerging Active Regions , A.A. Pevtsov, V. Maleev, and D.W.
Longcope, Astrophysical Journal, 593, 1217-1225 (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)
- "A
model for the emergence of a twisted magnetic flux tube", D. W. Longcope
and B. T. Welsch, Astrophysical Journal 545, 1089-1100 (2000)