Name: Sunspot Formation: Theory, Simulations and Observations
Start: 2015-03-09T09:00:00+01:00
End: 2015-03-13T18:30:00+01:00
Location: Albanova, Stockholm

Sunspot Formation: Theory, Simulations and Observations

from Monday, 9 March 2015 (09:00) to Friday, 13 March 2015 (18:30)

Monday, 9 March 2015

08:00 Registration
Registration
08:00 - 09:00
Room: Albanova entrance, 5th floor
09:00
09:00 - 10:40
Room: Oskar Klein Auditorium
Contributions

09:00 Global properties of the Sun's magnetic field - Karel Schrijver (Lockheed Martin Advanced Technology Center)

09:40 Study of sunspot group evolution on a large statistical sample - Judit Muraközy (Heliophysical Observatory of Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences)

10:00 Solar cycle properties from Schwabe data - Senthamizh Pavai Valliappan (Leibniz Institute for Astrophysics)

10:20 Understanding stellar cycle and noise to search for Earth-like exoplanets - Fabio Del Sordo (NoRDITA/Yale University)
10:40 Coffee break
Coffee break
10:40 - 11:10
Room: 4th floor
11:10
11:10 - 13:10
Room: Oskar Klein Auditorium
Contributions

11:10 Flows in the Convection Zone with Potential Relevance to the Sunspot Problem. - Thomas Duvall (MPS Gottingen)

11:50 The radial gradient of the near-surface shear layer of the Sun - Atefeh Barekat (Max-Planck-Institut für Sonnensystemforschung (MPS))

12:10 Prediction of solar activity (Wolf numbers) based on nonlinear dynamo - Nathan Kleeorin (Ben-Gurion University of the Negev)

12:40 Helicity observations as a constraint of dynamo models - Mei Zhang (National Astronomical Observatory of China)
13:10 Lunch
Lunch
13:10 - 14:30
Room: Cafeteria (3th floor)
14:30
14:30 - 15:40
Room: Oskar Klein Auditorium
Contributions

14:30 One Model Doesn't Fit All: Recent Results of a Detailed Analysis of Sunspot Demographics - Andres Munoz-Jaramillo (Montana State University)

15:10 Emergence and Decay of Sunspots Groups Observed with HMI - Aimee Norton (Stanford University)
15:40 Coffee break
Coffee break
15:40 - 16:10
Room: 4th floor
16:10
16:10 - 18:00
Room: Oskar Klein Auditorium
Contributions

16:10 Small-scale emerging flux and local dynamo action - Irina Kitiashvili (NASA Ames Research Center)

16:50 Joy's law revisited by using the new Debrecen tilt angle database - András Ludmány (MTA Debrecen Heliophysical Observatory)

17:10 Discussion on the topics of the first day - Rainer Arlt
18:00 Wine & Cheese
Wine & Cheese
18:00 - 20:00
Room: 4th floor
Tuesday, 10 March 2015
09:00
09:00 - 10:20
Room: Oskar Klein Auditorium
Contributions

09:00 Towards understanding the subsurface structure of sunspots - Hannah Schunker (Max Planck Institute for Solar System Research)

09:40 Properties of sunspot formation as seen from high-resolution observations - Nazaret Bello Gonzalez (Kiepenheuer-Institut fuer Sonnenphysik)

10:00 Examining the relationship between buoyant velocity and magnetic field of an emerging active region - Chia-Hsien Lin (National Central University)
10:20 Coffee break
Coffee break
10:20 - 10:50
Room: 4th floor
10:50
10:50 - 11:30
Room: Oskar Klein Auditorium
Contributions

10:50 Flux emergence: simulations and observations - Bob Stein (Michigan State University)
11:30
11:30 - 13:00
Room: Oskar Klein Auditorium
Contributions

11:30 Emerging flux in a Solar-like Convective Dynamo - Yuhong Fan (NCAR)

12:10 Scrutinizing the transport of magnetic flux from the tachocline to the surface of solar-like stars. - Yori Fournier (Leibniz Institute for Astrophysics)

12:30 Global solar dynamo simulation with and without tachocline: a quest for the dynamo location - Gustavo Guerrero (Universidade Federal de Minas Gerais)
13:00 Lunch
Lunch
13:00 - 14:30
Room: Cafeteria (3th floor)
14:30
14:30 - 16:10
Room: Oskar Klein Auditorium
Contributions

14:30 High resolution calculations of solar global convection and dynamo - Hideyuki Hotta (HAO/NCAR)

15:10 Understanding the equatorward migration of the Sun’s magnetic field - Jörn Warnecke (Max-Planck-Institut für Sonnesystemforschung)

15:30 Grand minima of sunspots and dynamo models - Bidya Binay Karak (Nordita)

15:50 Magnetic coupling of the solar atmosphere and the role of sunspots - Rohan Eugene Louis (Leibniz Institute for astrophysics (AIP))
16:10 Coffee break
Coffee break
16:10 - 16:40
Room: 4th floor
16:40
16:40 - 18:10
Room: Oskar Klein Auditorium
Contributions

16:40 Near surface effects relevant to sunspot formation. - Robert Cameron (Max Planck Institute for Solar System Research)

17:20 MHD simulations of sunspots and starspots with MURaM - Benjamin Beeck (Max Planck Institute for Solar System Research)

17:40 Non-LTE Calculation of Sunspot Spectra Based on Optically-Thick Semiempirical Modeling. - Eugene Avrett (Center for Astrophysics)
Wednesday, 11 March 2015
09:00
09:00 - 10:10
Room: Oskar Klein Auditorium
Contributions

09:00 A Fast-Moving Wave Implying Acoustic Wave Sources Beneath Sunspots Surface - Junwei Zhao (Stanford University)

09:40 MHD Waves and Directional Effects in Sunspots - Paul Cally (Monash University)
10:10 Coffee break
Coffee break
10:10 - 10:40
Room: Oskar Klein Auditorium
10:40
10:40 - 13:00
Room: Oskar Klein Auditorium
Contributions

10:40 Flows associated with emerging active regions - Aaron Birch (Max Planck Institute for Solar System Research)

11:20 A HEK survey of flows around sunspots - Neal Hurlburt (Lockheed Martin Solar & Astrophysics Laboratory)

11:50 Effects of rotation and stratification on magnetic flux concentrations - Illa Rivero Losada

12:10 Bipolar region formation in stratified two-layer turbulence - Jörn Warnecke (Max-Planck-Institut für Sonnesystemforschung)

12:30 Magnetic field concentrations from convection simulations - Petri Käpylä (University of Helsinki)
13:00 Lunch
Lunch
13:00 - 14:30
Room: Cafeteria (3th floor)

14:30 Free time
Free time
14:30 - 16:30
Room: City

16:30 Conference dinner with boat trip
Conference dinner with boat trip
16:30 - 20:30
Room: Gamla Stan
Thursday, 12 March 2015
09:00
09:00 - 10:10
Room: Oskar Klein Auditorium
Contributions

09:00 Time-distance helioseismology of emerging active regions - Alexander Kosovichev (New Jersey Institute of Technology)

09:30 Fanning out of the f-mode in presence of nonuniform magnetic fields - Nishant Singh (Nordita)

09:50 Atmospheric seismology of solar active regions - Aneta Wisniewska (Kiepenheuer-Institut fuer Sonnenphysik)
10:10 Coffee break
Coffee break
10:10 - 10:40
Room: 4th floor
10:40
10:40 - 13:00
Room: Oskar Klein Auditorium
Contributions

10:40 Intense bipolar structures from dynamo simulations - Dhrubaditya Mitra

11:10 Formation of intense bipolar regions in spherical dynamo simulations with stratification - Sarah Jabbari (PhD student)

11:30 Theories of sunspots formation: state of the art - Igor Rogachevskii (Ben-Gurion University of the Negev)

12:00 Discussion session: Local flux concentration - Robert Cameron
13:00 Lunch
Lunch
13:00 - 14:30
Room: Cafeteria (3th floor)
14:30
14:30 - 15:00
Room: Oskar Klein Auditorium
Contributions

14:30 Clustering of Flares and Clustering of Sunspots - Alan Title (Stanford Lockheed Institute)
15:15 Albanova colloquium: Zooming in on star and protoplanetary disk formation - Åke Nordlund
Albanova colloquium: Zooming in on star and protoplanetary disk formation
- Åke Nordlund
15:15 - 16:15
Room: Oskar Klein Auditorium daptive mesh refinement (AMR) simulations with the RAMSES code allow us to zoom in to sub-AU scales from Giant Molecular Cloud (GMC) outer scales (~ 40pc). With grid sizes down to ~100 AU (16 levels of factor 2 refinement) we can follow supernova driving of star formation over Myr time scales. With 22 level of refinement we can follow the accretion history of individual stars over ~100 kyr with grid sizes down to ~2 AU, and with 29 levels of refinement we can study the dynamics of accretion disks with jets and disk winds over time scales ~100 yr, with grid sizes down to ~0.015 AU. We are currently implementing AMR radiative energy transfer and non-equilibrium chemistry with dust in the RAMSES code, and also developing a new moving-mesh AMR code (DISPATCH), intended for the near future era of exa-scale computing.
16:15 Coffee break
Coffee break
16:15 - 16:45
Room: 4th floor
16:45
16:45 - 17:45
Room: Oskar Klein Auditorium
Contributions

16:45 Penumbra formation - Rolf Schlichenmaier (Kiepenheuer-Institut fuer Sonnenphysik)

17:25 Peeking at small-scale convection in sunspot penumbrae with high-resolution spectropolarimetry - Sara Esteban Pozuelo (Instituto de Astrofísica de Andalucía (IAA-CSIC))
Friday, 13 March 2015
09:00
09:00 - 10:20
Room: Oskar Klein Auditorium
Contributions

09:00 On the penumbra - Evershed flow - moat connection: A modeling perspective - Matthias Rempel (HAO/NCAR)

09:40 On sunspots and penumbrae - Åke Nordlund

10:00 Physical properties of a sunspot chromosphere with umbral flashes - Jaime de la Cruz Rodriguez (Institute for Solar Physics, Stockholm University)
10:20 Coffee break
Coffee break
10:20 - 10:50
Room: 4th floor
10:50
10:50 - 11:50
Room: Oskar Klein Auditorium
Contributions

10:50 SST observations and interpretations of penumbral fine structure - Göran Scharmer (Kungliga Vetenskapsakademien)

11:10 Observational Diagnostics of Magnetoconvection in a Sunspot Umbra - Nikola Vitas (Instituto de Astrofísica de Canarias)

11:30 Single sunspot structures and dynamics from the SOT (Hinode) and AIA (SDO) observations - Serge Koutchmy (Institut d'Astrophysique de Paris CNRS & UPMC)
12:00 Lunch
Lunch
12:00 - 13:00
Room: Oskar Klein Auditorium
13:00
13:00 - 15:00
Room: Oskar Klein Auditorium
Contributions

13:00 What causes downflows in magnetic flux concentrations? - Axel Brandenburg (Nordita)

13:20 Coherent Picture of Solar Activity - Mark Cheung (Lockheed Martin Solar & Astrophysics Laboratory)
15:00 Coffee break
Coffee break
15:00 - 15:30
Room: 4th floor

15:30 BBQ!
BBQ!
15:30 - 17:30
Room: Outside Albanova