Transcript Slide 1

The Helioseismic & Magnetic Imager – Magnetic Investigations
HMI Science Analysis Plan – Magnetic Topics
HMI Data
J.Todd Hoeksema for the HMI Magnetic Team
Magnetic Data
Filtergrams
Products
Line-of-Sight
Magnetic Field Maps
Magnetic
Observables
THoeksema
AKosovichev
2-1C Meridional Circulation
AKosovichev
3-1B Differential Rotation
AKosovichev
4-1D Near-Surface Shear Layer
JBeck
5-2A Activity Complexes, Cycle
Vector Magnetic
Field Maps
Line-of-sight
Magnetograms
1-1A Tachocline
YLiu
THoeksema,
JSchou, HAO
Vector
Magnetograms
YLiu, Schrijver
YLiu, JSchou,
*HAO
Surface Plasma Flows
JBeck, YLiu,
Continuum
Brightness
Coronal and
Solar wind Properties
RBush, JSchou
XPZhao, KHayashi
The HMI investigation will study the origin of solar variability
and will characterize and understand the Sun’s interior and the
various components of magnetic activity.
HMI Vector Field Pipeline & Products
Increase s/n:
 Standard HMI resolution
 Rebinned data
(retains temporal resolution)
 Averaged data
(retains spatial resolution)
EBenevolenskaya, TBai
6-2B Active Regions
THoeksema
7-2C Sunspots
TBai
8-2D Irradiance Variations
RBush
Teams are forming to address the principle scientific goals of
the mission. These topics, outlined in the HMI Science Plan
(http://hmi.stanford.edu/doc/Science_Plan/HMI_Science_Plan.pdf)
encompass a broad range of science that will be enabled by
9-3A Magnetic Shear
YLiu
HMI magnetic field observations.
10-3B Flare/CME Mag. Config
Coronal Magnetic Field
Extrapolations (non MHD)
ABSTRACT
LM, KHayashi
11-3C Flux Emergence
YLiu, LM
12-3D Magnetic Carpet+Heating
KHayashi, LM
13-4A Coronal Energetics AIA]1
Schrijver, YLiu
14-4B Large-scale B, Ph+Cor
KHayashi
15-4C Solar Wind + Evol, Struct
KHayashi
16-5A Far-side Activity Evolution
PScherrer
17-5B Predicting A-R Emergence
TBai
18-5C IMF Bs Events
XPZhao
19 Topology Structure over AR
??
20 B-Polar, Large/Small Int
EBenevolenskay
The Co-I team
desperately needs your participation to take
full advantage of the opportunities provided.
Magnetic Observables
HMI Data
Polarized filtergrams around the Fe I spectral line at 617.3 nm
made with the HMI tunable narrow band filter enable
determination of all three components of the vector
photospheric magnetic field in half arc second pixels with a
cadence of five minutes at all times.
Stokes I, Q, U, and V;
Vector Magnetograms
(|B|, inclination,
azimuth, …)
Filtergrams
Development of pipeline processing modules to produce the
full menu of data products is currently underway. The final
data products are presently being defined. Some STANDARD
products will be computed at all times, others will be produced
On DEMAND or during times of special interest. Some data
products requiring intensive processing will only be produced
On REQUEST when resources allow.
Vector magnetic field in active regions:
In heliographic coordinates
In image coordinates
Full disk vector magnetic field:
In image coordinates
In spherical coordinates
Vector Magnetic
Field Maps
Field Inversion
Calibration and
Correction of
Filtergrams
180 Degree Ambiguity Solver


Synoptic maps of vector field
(B_r, B_theta, B_phi):
Standard synoptic charts;
Synoptic frames;
Daily update synoptic maps.
Fast (potential or lfff);
Slower but better.
Science Objectives, Observables, and Magnetic Data Product Teams
Preliminary Magnetic Topic Group Affiliations
(Please Sign Up!!)
Observables
•Line-of-sight magnetograms – THoeksema, JSchou, HAO, KD Leka
•Vector magnetograms – YLiu, JSchou, HAO, SCouvidat, KD Leka
•Continuum Brightness – RBush?, JSchou, NHurlburt, TBerger, PBoerner, JKuhn
Magnetic Data Products
•Line of sight magnetic maps – THoeksema, EBenevolenskaya, TBai
•Vector field maps – YLiu, THoeksema, EBenevolenskaya, ANorton, KD Leka, Blites, BBSO-JJing, VYurchyshyn
•Coronal field extrapolations [AIA] – YLiu, KSchrijver, XPZhao, KHayashi, LM-MCheung
•Coronal & Solar Wind – XPZhao, KHayashi, THoeksema, SAIC-Linker
•Surface Plasma Flows – JBeck, YLiu, KHayashi, EBenevolenskaya, TBai, BWelsh, STWu, RShine, BDePontieu, TBerger, SAIC-Linker
Science Objectives
•1-1A – Tachocline - AKosovichev
•2-1C – Meridional Circulation - AKosovichev
•3-1B – Differential Rotation - AKosovichev
•4-1D – Near-surface Shear Layer - JBeck
•5-2A – Activity Complexes – EBenevolenskaya, TBai, THoeksema, KHayashi, NHurlburt, VGaizauskus, JHarvey
•6-2B – Active Regions – THoeksema, EBenevolenskaya, TBai, KHayashi, NHurlburt
•7-2C – Sunspots – TBai, THoeksema, EBenevolenskaya, NHurlburt
•8-2D – Irradiance Variations – RBush, TBerger, PBoerner
•9-3A – Magnetic Shear – YLiu, JBeck, KHayashi, AKosovichev, BBSO-VYurchyshyn
•10-3B – Flare/CME Magnetic Config – KHayashi, LM?, YLiu, XPZhao, TBai, AKosovichev, UC-B,BBSO-HWang
•11-3C – Flux Emergence – YLiu, JBeck, EBenevolenskaya, LHayashi, LM, BLites, KD Leka, BBSO-HWang
•12-3D – Mag. Carpet & Heating [AIA#1] – KHayashi, KSchrijver, JBeck, EBenevolenskaya
•13-4A – Coronal Energetics [AIA] – KSchrijver, YLiu, EBenevolenskaya, XPZhao, KHayashi, KD Leka, MCheung, UC-B,BBSO HWang
•14-4B – Large-scale B – Ph. + Cor. - KHayashi, THoeksema, EBenevolenskaya, XPZhao
•15-4C – Solar Wind – Evol. + Struct. - KHayashi, THoeksema, XPZhao, MWSO, CISM, LM-SFuselier, SAIC-ZMikic
•16-5A – Far-side Activity – PScherrer, CLindsey, DBraun, SAIC
•17-5B – Predicting AR Emergence - TBai
•18-5C – IMF Bs Events – XPZhao, YLiu, KHayashi, BBSO-VYurchyshyn, Hu, HINODE, LM-SFuselier, SAIC-ZMikic
•19 – Magnetic Topology – YLiu, MSU-DLongcope, Barnes, SAIC-Titov
•20 – Polar & Multi-scale Field – EBenevolenskaya, THoeksema
HMI Data Processing
HMI Data
Heliographic
Doppler velocity
maps
Filtergrams
Ring diagrams
Doppler
Velocity
Tracked Tiles
Of Dopplergrams
Level-1
Spherical
Harmonic
Time series
To l=1000
Mode frequencies
And splitting
Local wave
frequency shifts
Time-distance
Cross-covariance
function
Wave travel times
Egression and
Ingression maps
Wave phase
shift maps
Internal rotation Ω(r,Θ)
(0<r<R)
Magnetograms (standard)
(full disk, full resolution,
1-hour average)
SYNOPTIC PRODUCTS
Full disk vector field maps (standard)
(full resolution, 10-minute cadence)
Synoptic frame (standard)
(in a cadence of 1-day)
Full disk vector field maps (standard)
(full resolution, 6-hour cadence)
Daily update Synoptic map (standard)
(in a cadence of 1-day)
Vector magnetic field maps in AR patches (standard)
(in heliographic coord., full res., 6-hour cadence)
Synoptic map (standard)
1-hour average vector magnetic field maps (standard)
(full disk, full resolution, 6-hour cadence)
Magnetograms (on-request)
(AR patches, full resolution,
2-minute cadence)
Magnetograms (on-request)
(full disk, full resolution,
2-minute cadence)
Synoptic frame (on-demand)
(in a cadence of 30-minute)
Vector magnetic field maps (on-demand)
(full disk, full resolution, 30-minute cadence)
Synoptic frame (on-demand)
(in a cadence of 30-minute)
Vector magnetic field maps (on-demand)
(AR patches, full resolution, 30-minute cadence)
Daily update Synoptic map (on-demand)
(in a cadence of 30-minute)
Vector magnetic field maps (on-request)
(full disk, full resolution, 2-minute cadence)
Synoptic frame (on-request)
(in a cadence of 2-minute)
Stokes I, Q, U and V (on-request).
Daily update Synoptic map (on-request)
(in a cadence of 2-minute)
Vector magnetic field maps (on-request)
(AR patches, full resolution, 2-minute cadence)
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Full-disk velocity, v(r,Θ,Φ),
And sound speed, cs(r,Θ,Φ),
Maps (0-30Mm)
Carrington synoptic v and cs
maps (0-30Mm)
High-resolution v and cs
maps (0-30Mm)
Deep-focus v and cs
maps (0-200Mm)
Far-side activity index
Stokes
I,Q,U,V
Full-disk 10-min
Averaged maps
Vector Magnetograms
Fast algorithm
Tracked Tiles
Vector Magnetograms
Inversion algorithm
Coronal magnetic
Field Extrapolations
Tracked full-disk
1-hour averaged
Continuum maps
Solar limb parameters
Coronal and
Solar wind models
Brightness feature
maps
Brightness Images
HINODE Spectropolarimetric Magnetic Field Inverted with HMI-like Algorithm by S. Tomczyk & J. Borrero (HAO)
The three panels show Inclination, Azimuth & Magnetic Field Strength as observed May 7, 2007
HMI Sun Testing- Early Images
Internal sound speed,
cs(r,Θ) (0<r<R)
Line-of-sight
Magnetograms
HMI Data Analysis Pipeline
Magnetograms (standard)
(full disk, full resolution,
10-minute cadence?)
VECTOR MAGNETIC MAPS
Data Product
Stokes
I,V
Continuum
Brightness
“Ambiguous” Observables
Line-of-Sight
Magnetic Field Maps
Vector Magnetic
Field Maps
First Dopplergram
First Magnetogram
180
-180
180
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