Recent efforts of Dana and assorted collaborators
Sorted chronologically below or by
topic
2008
-
The Number Of Magnetic Null Points In The Quiet Sun Corona,
D.W. Longcope and C.E. Parnell, Solar Physics (in press)
-
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 (in press)
-
Effects of partitioning and extrapolation on the connectivity of potential
magnetic fields, D.W. Longcope, G. Barnes, and C. Beveridge
ApJ(in press)
-
Defining and Calculating Self-Helicity in Coronal Magnetic Fields
D.W. Longcope and A. Malanushenko, ApJ 674, 1130-1143 (2008)
2007
- 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. (to appear in Topical Issue on Sun-Earth Events)
2006
2005
- 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)
2004
- 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 (in press)
2003
- 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.).
2002
- 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)
2001
- 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)
2000
1999
- "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).
1998
- "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)