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2. A journey of exploration to the polar regions of a star: probing the solar poles and the heliosphere from high helio-latitude

Author

Harra, Louise, Andretta, Vincenzo, Appourchaux, Thierry, Baudin, Frédéric, Bellot-Rubio, Luis, Birch, Aaron C., Boumier, Patrick, Cameron, Robert H., Carlsson, Matts, Corbard, Thierry, Davies, Jackie, Fazakerley, Andrew, Fineschi, Silvano, Finsterle, Wolfgang, Gizon, Laurent, Harrison, Richard, Hassler, Donald M., Leibacher, John, Liewer, Paulett, MacDonald, Malcolm, Maksimovic, Milan, Murphy, Neil, Naletto, Giampiero, Nigro, Giuseppina, Owen, Christopher, Martínez-Pillet, Valentín, Rochus, Pierre, Romoli, Marco, Sekii, Takashi, Spadaro, Daniele, Veronig, Astrid, and Schmutz, Werner

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

A mission to view the solar poles from high helio-latitudes (above 60$^\circ$) will build on the experience of Solar Orbiter as well as a long heritage of successful solar missions and instrumentation (e.g. SOHO \cite{SOHO}, STEREO \cite{stereo}, Hinode \cite{Hinode}, SDO \cite{SDO}), but will focus for the first time on the solar poles, enabling scientific investigations that cannot be done by any other mission. One of the major mysteries of the Sun is the solar cycle. The activity cycle of the Sun drives the structure and behaviour of the heliosphere and is, of course, the driver of space weather. In addition, solar activity and variability provides fluctuating input into the Earth climate models, and these same physical processes are applicable to stellar systems hosting exoplanets. One of the main obstructions to understanding the solar cycle, and hence all solar activity, is our current lack of understanding of the polar regions. In this White Paper, submitted to the European Space Agency in response to the Voyage 2050 call, we describe a mission concept that aims to address this fundamental issue. In parallel, we recognise that viewing the Sun from above the polar regions enables further scientific advantages, beyond those related to the solar cycle, such as unique and powerful studies of coronal mass ejection processes, from a global perspective, and studies of coronal structure and activity in polar regions. Not only will these provide important scientific advances for fundamental stellar physics research, they will feed into our understanding of impacts on the Earth and other planets' space environment., Comment: 29 pages, 9 figures, White paper for ESA Voyage 2050

Published
2021
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3. A journey of exploration to the polar regions of a star: probing the solar poles and the heliosphere from high helio-latitude

Author

Harra, Louise, Andretta, Vincenzo, Appourchaux, Thierry, Baudin, Frédéric, Bellot-Rubio, Luis, Birch, Aaron C., Boumier, Patrick, Cameron, Robert H., Carlsson, Matts, Corbard, Thierry, Davies, Jackie, Fazakerley, Andrew, Fineschi, Silvano, Finsterle, Wolfgang, Gizon, Laurent, Harrison, Richard, Hassler, Donald M., Leibacher, John, Liewer, Paulett, Macdonald, Malcolm, Maksimovic, Milan, Murphy, Neil, Naletto, Giampiero, Nigro, Giuseppina, Owen, Christopher, Martínez-Pillet, Valentín, Rochus, Pierre, Romoli, Marco, Sekii, Takashi, Spadaro, Daniele, Veronig, Astrid, and Schmutz, W.

Published
2022
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8. Development of a new analysis technique to measure low radial-order p modes in spatially-resolved helioseismic data

Author

Salabert, David, Leibacher, John W., and Appourchaux, Thierry

Subjects
Astrophysics
Abstract

In order to take full advantage of the long time series collected by the GONG and MDI helioseismic projects, we present here an adaptation of the rotation-corrected $m$-averaged spectrum technique in order to observe low radial-order solar p modes. Modeled profiles of the solar rotation demonstrated the potential advantage of such a technique. Here we develop a new analysis procedure which finds the best estimates of the shift of each $m$ of a given ($n,\ell$) multiplet, commonly expressed as an expansion in a set of orthogonal polynomials, which yield the narrowest mode in the $m$-averaged spectrum. We apply the technique to the GONG data for modes with $1 \leq \ell \leq 25$ and show that it allows us to measure lower-frequency modes than with classic peak-fitting analysis of the individual-$m$ spectra., Comment: 5 pages, Conference proceeding, HELAS II International Conference, August 20-24, 2007 Helioseismology, Asteroseismology and MHD Connections Goettingen, Germany

Published
2007
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12. Status of Women in Astronomy: A need for advancing inclusivity and equal opportunities

Author

Pandey-Pommier, Mamta, Piccialli, Arianna, Wilkes, Belinda J., Hasan, Priya, VargasDominguez, Santiago, Hassanin, Alshaimaa Saad, Lazzaro, Daniela, Lagos, Claudia D. P., Masegosa, Josefa, Yang, Lili, Valls-Gabaud, David, Leibacher, John, Norman, Dara J., Nastula, Jolanta, Bamba, Aya, Pandey-Pommier, Mamta, Piccialli, Arianna, Wilkes, Belinda J., Hasan, Priya, VargasDominguez, Santiago, Hassanin, Alshaimaa Saad, Lazzaro, Daniela, Lagos, Claudia D. P., Masegosa, Josefa, Yang, Lili, Valls-Gabaud, David, Leibacher, John, Norman, Dara J., Nastula, Jolanta, and Bamba, Aya

Abstract

Women in the Astronomy and STEM fields face systemic inequalities throughout their careers. Raising awareness, supported by detailed statistical data, represents the initial step toward closely monitoring hurdles in career progress and addressing underlying barriers to workplace equality. This, in turn, contributes to rectifying gender imbalances in STEM careers. The International Astronomical Union Women in Astronomy (IAU WiA) working group, a part of the IAU Executive Committee, is dedicated to increasing awareness of the status of women in Astronomy and supporting the aspirations of female astronomers globally. Its mission includes taking concrete actions to advance equal opportunities for both women and men in the field of astronomy. In August 2021, the IAU WiA Working Group established a new organizing committee, unveiling a comprehensive four-point plan. This plan aims to strengthen various aspects of the group's mission, encompassing: (i) Awareness Sustainability: Achieved through surveys and data collection, (ii) Training and Skill Building: Focused on professional development, (iii) Fundraising: To support key initiatives, and (iv) Communication: Dissemination of results through conferences, WG Magazines, newsletters, and more. This publication provides an overview of focused surveys that illuminate the factors influencing the careers of women in Astronomy, with a particular focus on the careers of mothers. It highlights the lack of inclusive policies, equal opportunities, and funding support for women researchers in the field. Finally, we summarize the specific initiatives undertaken by the IAU WiA Working Group to advance inclusivity and equal opportunities in Astronomy., Comment: 5 pages, 2 figures

Published
2023

13. Preface

Author

Mansour, Nagi N., Kosovichev, Alexander G., Komm, Rudolf, Longcope, Dana, Leibacher, John W., Mansour, Nagi N., editor, Kosovichev, Alexander G., editor, Komm, Rudolf, editor, and Longcope, Dana, editor

Published
2014
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16. Preface

Author

Tomczyk, Steven, Zhang, Jie, Bastian, Timothy, Leibacher, John W., Tomczyk, Steven, editor, Zhang, Jie, editor, and Bastian, Timothy, editor

Published
2014
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21. Preface

Author

Mansour, Nagi N., Kosovichev, Alexander G., Komm, Rudolf, Longcope, Dana, and Leibacher, John W.

Published
2013
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22. A journey of exploration to the polar regions of a star: probing the solar poles and the heliosphere from high helio-latitude

Author

Harra, Louise, primary, Andretta, Vincenzo, additional, Appourchaux, Thierry, additional, Baudin, Frédéric, additional, Bellot-Rubio, Luis, additional, Birch, Aaron C., additional, Boumier, Patrick, additional, Cameron, Robert H., additional, Carlsson, Matts, additional, Corbard, Thierry, additional, Davies, Jackie, additional, Fazakerley, Andrew, additional, Fineschi, Silvano, additional, Finsterle, Wolfgang, additional, Gizon, Laurent, additional, Harrison, Richard, additional, Hassler, Donald M., additional, Leibacher, John, additional, Liewer, Paulett, additional, Macdonald, Malcolm, additional, Maksimovic, Milan, additional, Murphy, Neil, additional, Naletto, Giampiero, additional, Nigro, Giuseppina, additional, Owen, Christopher, additional, Martínez-Pillet, Valentín, additional, Rochus, Pierre, additional, Romoli, Marco, additional, Sekii, Takashi, additional, Spadaro, Daniele, additional, Veronig, Astrid, additional, and Schmutz, W., additional

Published
2021
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23. Preface

Author

Fan, Yuhong, Fisher, George, Leibacher, John, Fan, Yuhong, editor, and Fisher, George, editor

Published
2012
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24. Preface

Author

Tomczyk, Steven, Zhang, Jie, Bastian, Timothy, and Leibacher, John W.

Published
2013
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25. Preface

Author

Mansour, Nagi N., primary, Kosovichev, Alexander G., additional, Komm, Rudolf, additional, Longcope, Dana, additional, and Leibacher, John W., additional

Published
2013
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26. Preface

Author

Tomczyk, Steven, primary, Zhang, Jie, additional, Bastian, Timothy, additional, and Leibacher, John W., additional

Published
2013
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28. Preface

Author

Fan, Yuhong, primary, Fisher, George, additional, and Leibacher, John, additional

Published
2011
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32. EDITORIAL APPRECIATION

Author

Engvold, Oddbjørn, Harvey, Jack, Leibacher, John, Sakurai, Takashi, Švestka, Zdeněk, and van Driel-Gesztelyi, Lidia

Published
2006

33. The global oscillation network group site survey: II.Results

Author

Hill, Frank, Fischer, George, Forgach, Suzanne, Grier, Jennifer, Leibacher, John W., Jones, Harrison P., Jones, Patricia B., Kupke, Renate, Stebbins, Robin T., Clay, Donald W., Ingram, Robert E. L., Libbrecht, Kenneth G., Zirin, Harold, Ulrichi, Roger K., Websteri, Lawrence, Hieda, Lester S., Labonte, Barry J., Lu, Wayne M. T., Sousa, Edwin M., Garcia, Charles J., Yasukawa, Eric A., Kennewell, John A., Cole, David G., Zhen, Huang, Su-Min, Xiao, Bhatnagar, Arvind, Ambastha, Aashok, Al-Khashlan, Abdulrahman Sa'Ad, Abdul-Samad, Muhammad-Saleh, Benkhaldoun, Zouhair, Kadiri, Samir, Sánchez, Francisco, Pallé, Pere L., Duhalde, Oscar, Solis, Hernan, Saá, Oscar, and González, Ricardo

Published
1994
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34. EDITORIAL

Author

Leibacher, John, Sakurai, Takashi, and van Driel-Gesztelyi, Lidia

Published
2005

38. Preface

Author

Fleck, Bernhard, Heber, Bernd, Vourlidas, Angelos, van Driel-Gesztelyi, Lidia, Mandrini, Cristina H., and Leibacher, John

Published
2012
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43. The Global Oscillation Network Group site survey. 1: Data collection and analysis methods

Author

Hill, Frank, Fischer, George, Grier, Jennifer, Leibacher, John W, Jones, Harrison B, Jones, Patricia P, Kupke, Renate, and Stebbins, Robin T

Subjects
Astronomy
Abstract

The Global Oscillation Network Group (GONG) Project is planning to place a set of instruments around the world to observe solar oscillations as continuously as possible for at least three years. The Project has now chosen the sites that will comprise the network. This paper describes the methods of data collection and analysis that were used to make this decision. Solar irradiance data were collected with a one-minute cadence at fifteen sites around the world and analyzed to produce statistics of cloud cover, atmospheric extinction, and transparency power spectra at the individual sites. Nearly 200 reasonable six-site networks were assembled from the individual stations, and a set of statistical measures of the performance of the networks was analyzed using a principal component analysis. An accompanying paper presents the results of the survey.

Published
1994

46. Helioseismology.

Author

Leibacher, John W.

Abstract

Helioseismology (similar to geophysicists' study of seismic waves) makes it possible to penetrate the sun's opaque brilliance by measuring surface oscillations. Their pattern and period hold clues to temperature, structure, composition, and dynamics of the sun's interior. Scientists have used data to build models (evolved mathematically) to explain historical development. (DH)

Published
1985

49. Helioseismology

Author

Leibacher, John W., Noyes, Robert W., Toomre, Juri, and Ulrich, Roger K.

Published
1985

50. Mechanical energy transport

Author

Stein, Robert F., Leibacher, John W., Ehlers, J., editor, Hepp, K., editor, Kippenhahn, R., editor, Weidenmüller, H. A., editor, Zittartz, J., editor, Beiglböck, W., editor, Gray, David F., editor, and Linsky, Jeffery L., editor

Published
1980
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