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4th Solar Polarization Workshop
September 19-23

3080 Center Green Drive
Bldg. 1 - Auditorium
Boulder, CO 80301

Meeting schedule

Monday 19
7:45-8:15 Registration
8:15-8:30 Introductory Remarks (Tim Killeen, NCAR Director)
Photospheric Magnetism (L. Bellot Rubio)

Sunspot Magnetic Fields - chair: M. Collados
8:30-9:10 K. Langhans
Signatures of penumbral magnetic fields at very high spatial resolution
9:10-9:30 J. Sanchez Almeida
The micro-structure of a sunspot penumbra
9:30-9:50 J.-M. Borrero Santiago
Sunspot penumbra: kinematic and magnetic structure
9:50-10:10 R. Schlichenmaier
Narrow-band circular polarization in sunspot penumbrae: Measurements confirm theoretical predictions
10:10-10:30 H. Balthasar
The magnetic field in sunspots
10:30-11:00 Coffee break and Poster viewing
11:00-11:20 D. Cabrera Solana
Inversion of visible and infrared sunspot Stokes profiles
11:20-11:40 M. Penn
Penumbral moving magnetic features
11:40-12:00 A. Sainz Dalda
The sunspot penumbrae, the moat filament, the moving magnetic features, and their relationship
12:00-1:30 Lunch break and Poster viewing

Quiet-Sun Magnetic Fields - chair: S. Solanki
1:30-2:10 M. Collados
Quiet sun magnetism
2:10-2:30 M.J. Martinez Gonzalez
Quiet Sun magnetic fields observed in visible and IR spectral ranges
2:30-2:50 E. Khomenko
Magnetic flux in the internetwork quiet Sun
2:50-3:10 I. Domínguez Cerdeña
Magnetic fields of the quiet Sun: distribution of field strengths
3:10-3:40 Coffee break and Poster viewing
3:40-4:00 A. López Ariste
Kilometer-sized magnetic structures in the quiet Sun
4:00-4:20 L. Bharti
G-band bright points and photospheric magnetic field
4:20-4:40 C. Keller
First results from SOLIS VSM vector magnetograms
Radiative Transfer Methods and Inversion Techniques (A. López Ariste)

chair: A. López Ariste
4:40-5:20 L. Bellot Rubio
Stokes inversion techniques: recent advances and new challenges
5:20-5:40 V. Bommier
UNNOFIT inversion of spectro-polarimetric maps observed with THEMIS
5:40-6:00 M. Derouich
Interpretation of second solar spectrum observed at the Pic-du-Midi and THEMIS
6:30-8:30 Reception at the Boulder Beer Company

Tuesday 20
Radiative Transfer Methods and Inversion Techniques (continued)

chair: A. López Ariste
8:30-8:50 H. Frisch
Effect of a turbulent magnetic field on spectral line polarization
8:50-9:10 G. Molodij
Major effects of line asymmetries in solar magnetic field measurements from simultaneous multiwavelength observations
9:10-9:30 T.A. Carroll
Estimating the rate of fluctuation and the size of penumbral structures from spectro-polarimetric observations
New Solar Polarimeters and Techniques (K. Balasubramaniam)

chair: C. Keller
9:30-9:50 A. Feller
Tunable narrow-band filter for imaging polarimetry
9:50-10:10 C. DeForest
Rapid imaging spectroscopy by stereoscopy of slitless dispersed images
10:10-10:30 G. Scharmer
Characterization of the SST polarization properties
10:30-11:00 Coffee break and Poster viewing
11:00-11:20 T. Moran
12 µ vector polarimetry at the McMath-Pierce telescope
11:20-11:40 K. Reardon
Spectro-polarimetry with IBIS
11:40-12:00 J. Schou
The Helioseismic and Magnetic Imager
12:00-1:30 Lunch break and Poster viewing
1:30-1:50 E. West
Polarization measurements in the vacuum ultraviolet using SUMI
Atomic Spectro-Polarimetry (J.O. Stenflo)

chair: E. Landi Degl'Innocenti
1:50-2:30 J.O. Stenflo
Second Solar Spectrum: Physical understanding and applications
2:30-2:50 A. Gandorfer
Polarimetry of the Second Solar Spectrum near the atmospheric cut-off
2:50-3:10 V. Bommier
Second spectrum of Na I D1 observed with THEMIS
3:10-3:40 Coffee break and Poster viewing
3:40-4:20 D. Fluri
Polarized scattering in strong chromospheric lines: Theory and its confrontation with observations
4:20-4:40 J. Trujillo Bueno
Towards a realistic modeling of the linearly polarized spectrum of titanium
4:40
Excursion to Major League Baseball: Colorado Rockies vs San Diego Padres


Wednesday 21
Excursion to Rocky Mountain National Park and Estes Park
or Free Day


Participants choose either a vigorous alpine hike, or a bus tour of the park followed by free time for lunch, shopping, etc., in Estes Park.

Hikers need:
  • Good physical condition
  • Hiking boots or sturdy shoes
  • Small backpack
  • Spare warm jacket, preferably weatherproof
  • Hat
  • Other spare clothing, as desired
  • Sunscreen
  • Sunglasses
(Sack lunch and water will be provided)



Thursday 22
Coronal Magnetic Fields (S. Tomczyk)

chair: R. Casini
8:30-9:10 H. Lin
Recent progresses and future prospect of coronal magnetometry
9:10-9:30 S. Tomczyk
Recent measurements with the Coronal Multi-Channel Polarimeter
9:30-9:50 J.R. Kuhn
Infrared coronal spectro-polarimetry from Haleakala/SOLARC
9:50-10:10 S. White
FASR and radio measurements of coronal magnetic fields
10:10-10:30 A. Lagg
Supersonic downflows in the vicinity of a solar pore
10:30-11:00 Coffee break and Poster viewing
Theory of collisional polarization (S. Sahal-Bréchot)

chair: H. Frisch
11:00-11:30 M. Derouich
Towards the calculation of the depolarization and polarization transfer rates of spectral lines of the second solar spectrum by isotropic collisions with neutral hydrogen
11:30-12:00 V. Bommier
Improvement of the semi-classical formalism by taking into account the momentum transfer
12:00-1:30 Lunch break and Poster viewing
1:30-2:00 J. Dubau
Theoretical Study of the polarization of the J=0-1 X-ray laser line of Ne-like ions
Laboratory Experiments and Molecular Spectro-Polarimetry (E. Landi Degl'Innocenti)

chair: J.O. Stenflo
2:00-2:40 J. Trujillo Bueno
A new look at the Sun's hidden magnetism by the Hanle effect in molecular and atomic lines
2:40-3:10 E. Landi Degl'Innocenti
Polarization in molecular bands
3:10-3:40 Coffee break and Poster viewing
3:40-4:20 A. Asensio Ramos
Zeeman effect in molecular lines
4:20-4:40 S. Berdyugina
Molecular spectro-polarimetry: Theory and observations
4:40-5:00 A. Shapiro
Hanle effect in the Paschen-Back regime
5:00-5:20 V. Bommier
Multi-line determination of the turbulent magnetic field from the second solar spectrum of MgH
5:20-5:40 A. Asensio Ramos
Three-dimensional modeling of the scattering polarization in MgH lines
6:00 Conference Banquet at the Red Lion Inn


Friday 23
Laboratory Experiments and Molecular Spectro-Polarimetry (continued)

chair: J.O. Stenflo
8:30-8:50 J. Arnaud
Sunspots and quiet-Sun Stokes polarimetry, simultaneously in molecular and atomic lines, from THEMIS
8:50-9:10 C. Thalmann
Laboratory experiment for polarized scattering at potassium vapor
Stellar Spectro-Polarimetry (G. Wade)

chair: S. Berdyugina
9:10-9:50 P. Petit
Spectro-polarimetry of magnetic cool stars
9:50-10:30 O. Kochukhov
Spectro-polarimetry of magnetic hot stars
10:30-11:00 Coffee break and Poster viewing
11:00-11:20 M. Semel
Full Stokes spectro-polarimetry of solar type stars and multiline Zeeman Doppler Imaging (ZDI) based on Principal Component Analysis of the calculations of polarized line formation
11:20-11:40 J.-F. Donati
ESPaDOnS at CFHT: A new window into the world of magnetic stars
11:40-12:00 G. Wade
Discovery of the pre-main sequence progenitors of the magnetic Ap/Bp stars
12:00-1:30 Lunch break and Poster viewing
1:30-1:50 N. Afram
Molecular diagnostics of the internal structure of starspots and sunspots
Chromospheric Electro-Magnetism (J. Trujillo Bueno)

chair: J. Trujillo Bueno
1:50-2:30 J. Harvey
Chromospheric magnetism
2:30-3:10 R. Casini
The effect of turbulent electric fields on the scattering polarization of hydrogen lines
3:10-3:40 Coffee break and Poster viewing
3:40-4:00 S. Solanki
The magnetic vector mapped near the base of the solar corona using the
He I 10830 Ẳ line
4:00-4:20 V. Martinez Pillet
Active Region filaments as seen in full Stokes He 10830 profiles
4:20-4:40 A. López Ariste
Magnetic fields in spicules
4:40-5:00 R. Ramelli
The Hanle and Zeeman Effects in Solar Spicules
5:00-5:20 M. Bianda
Spectro-polarimetry of filaments
5:20-5:40 L. Belluzzi
The Hanle and Zeeman effects in the D2 line of barium: A new diagnostic window
5:40-6:00 R. Centeno
Oscillations and wave propagation in different solar magnetic structures
6:00 Concluding Remarks


updated 9/8/05 by webmaster

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