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SpaceInn Global Helioseismology Team Meetings

2nd SpaceInn Global Helioseismology Team Meeting Free Conference is closed

Conference is closed

spaceinn_gh2.2015

Hosted by Markus Roth

Affiliation Thüringer Landessternwarte Tautenburg

Kiepenheuer-Institut für Sonnenphysik, Freiburg, Germany

10.03.2015 - 12.03.2015

Organizing institutions

Kiepenheuer-Insitution for Solar Physics

Main category Natural Sciences (Astrophysics and Astrononmy)

Alternative category Natural Sciences (Physics)

Conference/Workshop objectives

Meeting Objectives: We need to review the actions of the previous meeting. - Presentations on activity (new paper based on GOLF done by David) - Progress on low-frequency analyses - Development of a new simple code for fitting helioseismic data - Based on Diamonds (Bayesian public code by Corsaro) - a general MLE code - Progress on combining data of different instruments - Presentation of the deliverable (S_ph) - New global helioseismic techniques - Discussion on the frequency of updating (every 3-4 months)

Local organizing committee

Markus Roth (Chair); Bettina Schäfer

Scientific organizing committee (SOC) Rafael García; Markus Roth (Chair);

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Sessions

Review of actions
Presentations on activity and variation
Progress on low-frequency analyses
Development of a new simple code for fitting helioseismic data
Progress on combining data of different instruments
New global helioseismic techniques

Programme

Invited speakers David Salabert; Sylvain Korzennik; Jesper Schou

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Important dates

End of registration:
March 11, 2015

Registration and payment information

Registration is for free and includes coffee breaks and lunches.

A self-paid workshop dinner will be organzied.

Conference venue

The meeting will take place in the seminar room of the Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg, Germany

Hotel information

The following lists the closest hotels near the Kiepenheuer-Institut für Sonnenphysik. Please make a reservation yourself.

1. Hotel am Stadtgarten: http://www.hotelamstadtgarten.de/

2. Stadthotel Freiburg: http://www.hotel-freiburg.de/

3. Mercure Hotel Freiburg am Münster: http://www.mercure.com/de/hotel-0492-mercure-hotel-freiburg-am-muenster/index.shtml

Travel information

There are several airports nearby Freiburg:

1. Basel/Mulhouse/Freiburg, from there you can continue to Freiburg train station either by bus or by train (1 hour travel distance).

2. Strassbourg, from there you can continue to Freiburg by train going via Offenburg (2 hours travel distance).

3. Frankfurt, from there you can continue to Freiburg by the fast ICE trains (2.5 hours travel distance).

4. Zurich, from there you can continue via trains (2.5 hours travel distance).

For international arrivals, i.e. from outside Europe, the best options are flying to Frankfurt or Zurich and continuing from there by train.

Germany offers a good network of train connections. Major cities in Germany including Freiburg are connected by the fast ICE trains. The German (and European) train schedule is available at: http://www.bahn.de

There are no uploaded videos yet.

Markus Roth

Session: Review of actions

1360 views

Date of upload:

10.09.2015

Co-author:

Abstract:

This is the welcome presentation with the meeting agenda of the 2nd Global Helioseismology Team Meeting, that was held March 10 - 13, 2015 at the Kiepenheuer-Institut für Sonnenphysik, Freiburg, Germany

Rafael A. Garcia

Session: Review of actions

1169 views

Date of upload:

30.09.2015

Co-author:

Abstract:

Report on the annual activities of WP4.1

Rafael A. Garcia

Session: Review of actions

1142 views

Date of upload:

30.09.2015

Co-author:

Abstract:

Progress review

René Kiefer

Session: New global helioseismic techniques

1335 views

Date of upload:

30.09.2015

Co-author:

Ariane Schad, Wiebke Herzberg, and Markus Roth

Abstract:

Context. Solar-like oscillations exhibit a regular pattern of frequencies. This pattern is dominated by the small and large frequency separations between modes. The accurate determination of these parameters is of great interest, because they give information about e.g. the evolutionary state and the mass of a star. Aims. We want to develop a robust method to determine the large and small frequency separations for time series with low signal-tonoise ratio. For this purpose, we analyse a time series of the Sun from the GOLF instrument aboard SOHO and a time series of the star KIC 5184732 from the NASA Kepler satellite by employing a combination of Fourier and Hilbert transform. Methods. We use the analytic signal of filtered stellar oscillation time series to compute the signal envelope. Spectral analysis of the signal envelope then reveals frequency differences of dominant modes in the periodogram of the stellar time series. Results. With the described method the large frequency separation $\Delta\nu$ can be extracted from the envelope spectrum even for data of poor signal-to-noise ratio. A modification of the method allows for an overview of the regularities in the periodogram of the time series.

Enrico Corsaro

Session: Development of a new simple code for fitting helioseismic data

1420 views

Date of upload:

02.10.2015

Co-author:

Abstract:

The development of a new fitting tool to handle with high-resolution acoustic spectra of the Sun is of central interest to allow for measuring the asteroseismic properties of solar oscillations in a robust and reliable way. A Bayesian approach implemented in the recently released code DIAMONDS and an extension of this code applied to the case of Sun-as-a-star datasets from both GOLF and VIRGO instruments are presented.

David Salabert

Session: Presentations on activity and variation

1261 views

Date of upload:

05.10.2015

Co-author:

Abstract:

Solar magnetic activity inferred from helioseismology: the weak solar Cycle 24

David Salabert

Session: Presentations on activity and variation

1185 views

Date of upload:

05.10.2015

Co-author:

Abstract:

Solar activity proxies from VIRGO and GOLF observations: SpaceInn Deliverable 4.2

Kevin Belkacem

Session: Review of actions

1553 views

Date of upload:

30.09.2015

Co-author:

C. Renié and E. Michel

Abstract:

The wealth of seismic data available from space borne missions (SOHO, CoRoT, Kepler, SDO,…), and from ground-based observations (GONG, Bison, ground-based large programmes…), is stimulating solar and stellar structure and evolution studies but is also opening new scientific perspectives (e.g. characterization of planetary systems, stellar population in our galaxy, etc…). These applications address a broad scientific community within and beyond the solar and stellar communities. They require combining data of various types and from various sources. The Seismic Plus Portal intends to help this increasing use of seismic information by providing, at a well-identified place, a homogeneous description and access for sources of solar and stellar seismic data as well as for sources of complementary and ground-based data. The Seismic Plus portal is now open and available at http://voparisspaceinn.obspm.fr/seismicplus/. It is currently being developed in the framework of the SPACEInn project (Exploitation of Space Data for Innovative Helio- and Asteroseismology) financed by the European Union under the Seventh Framework Programme (FP7). We describe here the opening of the Seismic Plus portal and provide a short description of its main functionalities.

There are no uploaded papers yet.

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