Second Announcement:

This is the second announcement for the fifth Loops Workshop to be held in Palma de Mallorca, Spain, June 29-July 2, 2011, hosted by the Universitat de les Illes Balears. The loops workshops are a series of highly focused meetings dealing with the observation and modeling of magnetically confined plasma in the solar upper atmosphere.

The workshop will start in the afternoon of June 29th and it will run full day on Saturday July 2nd. A detailed program will be available in May 2011, once the abstract submission is closed and abstracts are sorted.

We are also pleased to announce that we have limited funds from ESA and the US NSF to support the travel expenses of students and early post-docs.

The deadlines for abstract submission are:
- March 15 2011, if requesting travel support
- April 15, 2011, everyone else.

For this meeting the SOC has defined a series of topics and questions and speakers have been invited to lead each session. We encourage the submission of abstracts that contribute to the topics described below. To allow for extended discussion sessions the number of speakers will be limited to about 40. We anticipate having a poster session to accommodate other topics of interest.

These are the planned sessions and confirmed invited speakers:

The Coronal Heating Problem: Talks that will address the current state of the coronal heating problem, including recent progress and interesting theoretical paradigms. 
Invited speakers: Iñigo Arregui (Illes Balears), Peter Cargill (St. Andrews)


The Properties of the Solar Corona: Talks that will explore the boundaries of our understanding of the solar corona and its relationship to the transition region and chromosphere.
Invited speakers: Giulio Del Zanna (Cambridge), Susanna Parenti(Royal Observatory Belgium)

Integrating Models and Observations: A systematic look at coronal heating models and what they predict for solar observables.
Invited speaker: Amy Winebarger (NASA)

Open Questions in Coronal Loops: A Series of Debates.

- Flows vs Waves.
  Are they exclusive? Can we distinguish between them? What role does
  each play in loop dynamics?
  Invited speakers:  Scott McIntosh (UCAR), Erwin Verwichte (Warwick)

- Spicules vs. Evaporation.
  How does mass enter the corona? What is the relative contribution of
  spicules and evaporation? Are they compatible? Do all loops have
  spicular counterparts? What can we infer about the source of the
  heating from the observations?
  Invited speakers: Bart De Pontieu (Lockheed Martin), Spiros Patsourakos  (Ioannina)

- The DEM spectrum from isothermal to multi-thermal.
  What is the cross-field thermal structure of coronal loops? How does
  it vary in space and time?
  Invited speakers: Markus Aschwanden (Lockheed Martin) Paola Testa (CfA)

- Steady vs. Impulsive Heating.
  What is the timescale  between heating events in active regions?
  Invited speakers: Piet Martens (Montana), Fabio Reale (Palermo)

Discussions will focus on the predictions of various heating scenarios and how well they are supported by the available data.Our initial table of models and observables is given here.

Please, read this letter  describing the goal of the session

  Steady (static)

Steady

(bi-directional flow)

IHMS /Nanoflare

(short duration storm)

 Nanoflare 

(long duration storm)

l(time) steady steady evolving mostly steady
Density RTV ~ RTV (subsonic)

<RTV at high T

>RTV at low T

<RTV at high T

>RTV at low T

Doppler Shift 0 Small redshift <5km/s   v~T Modest reshifts

Modest redshift  5-20 km/s

v constant or increasing w/T

NT broadening 0 <10 km/s   10 - 15 km/s
Temperature Isothermal ~ Isothermal to very multithermal Mildly multithermal Highly multithermal
Hot/Warm ratio < 1.7 < 1.7 < 0.1 to >10 0.1 - 10

IHMS: Impulsively heated multiple strand
RTV: Rosner, Tucker and Vaiana, ApJ 220, 643 (1978)

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To allow for extended discussion sessions the number of speakers will be limited to about 40.

We anticipate having a poster session to accommodate other topics of interest.

Please, notice that the MHD waves and Seismology of the Solar Atmosphere Workshop will be held in Palma de Mallorca from 27 to 29, 2011. A joint session will take place on 29 June afternoon

We are pleased to acknowledge financial support received from the US National Science Foundation, European Space Agency, Universitat de les Illes Balears, Govern de les Illes Balears and Ministerio de Ciencia e Innovación

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