Expanding the boundaries of solar physics

As one of nine Centres of Excellence (SFF) at the University of Oslo, RoCS - Rosseland Centre for Solar Physics, has become a thriving international hub with 48 employees from around the globe.

Mann med grå skjorte og grått hår

Director Mats Carlsson started RoCS in 2017 and has work with solar physics for 40 years. Photo: UiO

The centre is three and a half years into their 10-years period and has become a strong international force. 

The overarching goal of the project is understanding the workings of the energetic Sun.

When the centre opened in November 2017, the Sun was close to minimum activity in its 11-year cycle but the activity is now building up towards an expected maximum in 2025. This will make it possible to get unprecedented observations of the active Sun to be compared with the detailed simulations carried out at RoCS.

Half-year overview of publications 2021

January

Downflowing umbral flashes as evidence of standing waves in sunspot umbraeJournal: Astronomy & Astrophysics
Co-author RoCS: Vasco Manuel de Jorge Henriques, Researcher, Jamie de la Cruz Rodríguez, Guest researcher 

ALMA and IRIS Observations of the Solar Chromosphere. I. An On-disk Type II Spicule
Journal: The Astrophysical Journal
Co-authors RoCS: Bart de Pontieu,  Professor II, Juan Martinez-Sykora, Doctoral Research Fellow, Viggo Hansteen, Professor, Mikolaj Szydlarski, Senior Engineer, Shahin Jafarzadeh, Researcher, Sven Wedemeyer, Associate Professor

ALMA and IRIS Observations of the Solar Chromosphere. II. Structure and Dynamics of Chromospheric Plages
Journal: The Astrophysical Journal
Co-authors RoCS: Bart de Pontieu,  Professor II, Juan Martinez-Sykora, Doctoral Research Fellow, Viggo Hansteen, Professor, Mikolaj Szydlarski, Senior Engineer, Shahin Jafarzadeh, Researcher, Sven Wedemeyer, Associate Professor

Alfvénic Perturbations in a Sunspot Chromosphere Linked to Fractionated Plasma in the Corona
Journal: The Astrophysical Journal
Co-author RoCS: Shahin Jafarzadeh, Researcher

February

Reply to: Signatures of sunspot oscillations and the case for chromospheric resonances
Journal: Nature Astronomy
Co-author RoCS: Shahin Jafarzadeh, Researcher

The chromospheric component of coronal bright points. Coronal and chromospheric responses to magnetic-flux emergence
Journal:  Astronomy & Astrophysics
Co-author RoCS: Daniel Elias Nóbrega-Siverio, guest researcher

Hot X-ray onsets of solar flares
Journal: Monthly Notices of the Royal Astronomical Society
Co-author RoCS: Lyndsay Fletcher, Professor II

A machine-learning approach to correcting atmospheric seeing in solar flare observations
Journal: Monthly Notices of the Royal Astronomical Society
Co-author RoCS: Lyndsay Fletcher, Professor II

High-resolution wave dynamics in the lower solar atmosphere
Journal: Philosophical Transactions of the Royal Society A
Co-author RoCS: Shahin Jafarzadeh, Researcher

SunPy
Journal: Zenodo
Co-author RoCS: Tiago Pereira, Associate Professor

Spectropolarimetric fluctuations in a sunspot chromosphere
Journal: Philosophical Transactions of the Royal Society A
Co-author RoCS: Shahin Jafarzadeh, Researcher

Characterization of shock wave signatures at millimetre wavelengths from Bifrost simulations
Journal: Philosophical Transactions of the Royal Society A
1st Author: Henrik, Eklund, Doctoral Research Fellow
Co-authors RoCS: Sven Wedemeyer, Associate Professor, Shahin Jafarzadeh, Researcher, Mats Carlsson, Professor, Mikolaj Szydlarski, Senior Engineer

High-frequency oscillations in small chromospheric bright features observed with Atacama Large Millimetre/Submillimetre Array
Journal:  Philosophical Transactions of the Royal Society A
Co-authors RoCS: Shahin Jafarzadeh, Researcher, Sven Wedemeyer, Associate Professor, Mikolaj Szydlarski, Senior Engineer

Transverse motions in sunspot super-penumbral fibrils
Journal: Philosophical Transactions of the Royal Society A
Co-author RoCS: Vasco Manuel de Jorge Henriques, Researcher

An overall view of temperature oscillations in the solar chromosphere with ALMA
Journal: Philosophical Transactions of the Royal Society A
1st Author: Shahin Jafarzadeh, Researcher
Co-authors RoCS: Sven Wedemeyer, Associate Professor, Mikolaj Szydlarski, Senior Engineer, Vasco Manuel de Jorge Henriques, Researcher, Juan Camilo Guevara Gomez, Doctoral Research Fellow

Magnetoacoustic wave energy dissipation in the atmosphere of solar pores
Journal: Philosophical Transactions of the Royal Society A
Co-author RoCS: Shahin Jafarzadeh, Researcher

Acoustic-gravity wave propagation characteristics in three-dimensional radiation hydrodynamic simulations of the solar atmosphere
Journal: Philosophical Transactions of the Royal Society A
Co-author RoCS: Mats Carlsson, Professor

March 

Dynamics of small-scale dark features observed by the Atacama Large Millimeter/Submillimeter Array (ALMA)
Journal: The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun 
1st Author: Sven Wedemeyer, Associate Professor
Co-author RoCS: Juan Camilo Guevara Gomez, Doctoral Research Fellow

Saddle-shaped Solar Flare Arcades
Journal: The Astrophysical Journal Letters
Co-author RoCS: Guillaume Aulanier, Professor II

Discovery of Correlated Evolution in Solar Noise Storm Source Parameters: Insights on Magnetic Field Dynamics during a Microflare
Journal: The Astrophysical Journal Letters
1st Author: Atul Mohan, Postdoctoral Fellow

Spicules and downflows in the solar chromosphere
Journal: Astronomy & Astrophysics
1st Author: Souvik Bose, Doctoral Research Fellow
Co-authors RoCS: Jayant Joshi, Doctoral Research Fellow, Postdoctoral Researcher, Vasco Manuel de Jorge Henriques, Researcher, Luc Rouppe van der Voort, Professor

Excitation and evolution of coronal oscillations in self-consistent 3D radiative MHD simulations of the solar atmosphere
Journal: Astronomy & Astrophysics
1st Author: Petra Kohutova, Postdoctoral Fellow
Co-author RoCS: Andrius Popovas, Senior Engineer

April

SunPy
Journal: Zenodo
Co-author RoCS: Tiago Pereira, Associate Professor

Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
Journal: Solar Physics
Co-authors RoCS: Bart de Pontieu,  Professor II, Lyndsay Fletcher, Professor II, Mats Carlsson, Professor, Vasco Manuel de Jorge Henriques, Researcher, Shahin Jafarzadeh, Researcher

Waves and Quasi-Periodic-Pulsations in Weak Active Solar Emissions
Journal: vEGU21, the 23rd EGU General Assembly
Co-author RoCS: Atul Mohan, Postdoctoral Fellow

Emergence of Internetwork Magnetic Fields through the Solar Atmosphere
Journal: The Astrophysical Journal
1st Author: Bart De Pontieu, Professor II

Signatures of ubiquitous magnetic reconnection in the deep atmosphere of sunspot penumbrae
Journal:  Astronomy & Astrophysics
1st Author: Luc Rouppe van der Voort, Professor
Co-authors RoCS: Jayant Joshi, Postdoctoral Researcher, Vasco Manuel de Jorge Henriques, Researcher, Souvik Bose, Doctoral Research Fellow

Multichannel autocalibration for the Atmospheric Imaging Assembly using machine learning
Journal:  Astronomy & Astrophysics
Co-authors RoCS: Souvik Bose, Doctoral Research Fellow

May 

A New View of the Solar Interface Region from the Interface Region Imaging Spectrograph (IRIS)
Journal: Solar Physics
1st Author: Bart De Pontieu, Professor II
Co-authors RoCS: Viggo Hansteen, Professor, Daniel Elias Nóbrega-Siverio, guest researcher, Juan Martinez-Sykora, Doctoral Research Fellow, Mats Carlsson, Professor

Chromospheric Heating by MHD Waves and Instabilities
Journal: Journal of Geophysical Research - Space Physics
Co-author RoCS: Mats Carlsson, Professor

The effect of a solar flare on chromospheric oscillations
Journal: Monthly Notices of the Royal Astronomical Society
Co-author RoCS: Lyndsay Fletcher, Professor II

Reflections on the photodissociation of CO in circumstellar envelopes
Journal: Astronomy & Astrophysics
Co-author RoCS: Maryam Saberi, Postdoctoral Fellow

A novel approach to identify resonant MHD wave modes in solar pores and sunspot umbrae: B − ω analysis
Journal: Astronomy & Astrophysics
Co-author RoCS: Shahin Jafarzadeh, Researcher

June

Are the Magnetic Fields Radial in the Solar Polar Region?
Journal: Research Notes of the AAS
Co-author RoCS: Ana Belén Griñón Marin, Postdoctoral fellow

Evidence of chromospheric molecular hydrogen emission in a solar flare observed by the IRIS satellite
Journal: Monthly Notices of the Royal Astronomical Society
Co-author RoCS: Lyndsay Fletcher, Professor II

By Eyrun Thune
Published July 9, 2021 1:38 PM - Last modified July 12, 2021 3:52 PM