81 citations · 481 across the 34 of their papers we have counts for
21 papers · 1 filter
MHD Modelling of magnetic reconnection heating and jets in the solar corona
P. Pagano, C. Argiroffi, F. Reale +3
Magnetic reconnection is seen as the lead mechanism to explain the persistent and bursty heating of the solar corona that keeps its thermal structure. Lately the observations and m…
3D MHD simulations of coronal loops heated via magnetic braiding I. Continuous driving
Gabriele Cozzo, Paola Testa, Juan Martinez-Sykora +13
The nature and detailed properties of the heating of the million-degree solar corona are important issues that are still largely unresolved. Nanoflare heating might be dominant in…
PAStar: a model for stellar surface from the Sun to active stars
Antonino Petralia, Jesús Maldonado, Giuseppina Micela
Context. The characterization of exoplanets requires a good description of the host star. Stellar activity acts as a source of noise which can alter planet radii as derived from th…
Spot Modeling through Multiband Photometry Analysis of V1298 Tau
Alfredo Biagini, Antonino Petralia, Claudia Di Maio +3
Context. Stellar activity consists of different phenomena, mainly spots and faculae, and it is one of the main sources of noise in exoplanetary observations because it affects both…
Coronal energy release by MHD avalanches II. EUV line emission from a multi-threaded coronal loop
G. Cozzo, J. Reid, P. Pagano +13
MHD kink instability can trigger the fragmentation of a twisted magnetic flux tube into small-scale current sheets that dissipate as aperiodic impulsive heating events. This instab…
The enigmatic dance of the HD 189733A system: Does the planet accrete onto the star?
Salvatore Colombo, Ignazio Pillitteri, Antonino Petralia +2
Several studies suggest that the emission properties of a star can be affected by its interaction with a nearby planet. However, the actual observability of these effects remains a…
The GAPS programme at TNG LII. Spot modeling of V1298 Tau using SpotCCF tool
C. Di Maio, A. Petralia, G. Micela +27
The intrinsic variability due to the magnetic activity of young active stars is one of the main challenges in detecting and characterising exoplanets. We present a method able to m…
Acoustic wave properties in footpoints of coronal loops in 3D MHD simulations
Julia M. Riedl, Tom Van Doorsselaere, Fabio Reale +3
Acoustic waves excited in the photosphere and below might play an integral part in the heating of the solar chromosphere and corona. However, it is yet not fully clear how much of…
Probing the physics of the solar atmosphere with the Multi-slit Solar Explorer (MUSE): I. Coronal Heating
Bart De Pontieu, Paola Testa, Juan Martinez-Sykora +24
The Multi-slit Solar Explorer (MUSE) is a proposed NASA MIDEX mission, currently in Phase A, composed of a multi-slit EUV spectrograph (in three narrow spectral bands centered arou…
HADES RV programme with HARPS-N at TNG XIV. A candidate super-Earth orbiting the M-dwarf GJ 9689 with a period close to half the stellar rotation period
J. Maldonado, A. Petralia, M. Damasso +27
Context. It is now well-established that small, rocky planets are common around low-mass stars. However, the detection of such planets is challenged by the short-term activity of t…
HADES RV Programme with HARPS-N at TNG XII. The abundance signature of M dwarf stars with planets
J. Maldonado, G. Micela, M. Baratella +27
Most of our current knowledge on planet formation is still based on the analysis of main-sequence, solar-type stars. Conversely, detailed chemical studies of large samples of M-dwa…
Large-amplitude quasi-periodic pulsations as evidence of impulsive heating in hot transient loop systems detected in the EUV with SDO/AIA
Fabio Reale, Paola Testa, Antonino Petralia +1
Short heat pulses can trigger plasma pressure fronts inside closed magnetic tubes in the corona. The alternation of condensations and rarefactions from the pressure modes drive lar…
Impulsive coronal heating from large-scale magnetic rearrangements: from IRIS to SDO/AIA
Fabio Reale, Paola Testa, Antonino Petralia +1
The Interface Region Imaging Spectrograph (IRIS) has observed bright spots at the transition region footpoints associated with heating in the overlying loops, as observed by corona…
X-ray flare oscillations track plasma sloshing along star-disk magnetic tubes in Orion star-forming region
Fabio Reale, Javier Lopez-Santiago, Ettore Flaccomio +2
Pulsing X-ray emission tracks the plasma echo traveling in an extremely long magnetic tube that flares in an Orion Pre-Main Sequence (PMS) star. On the Sun, flares last from minute…
Guided flows in coronal magnetic flux tubes
A. Petralia, F. Reale, P. Testa
There is evidence for coronal plasma flows to break down into fragments and to be laminar. We investigate this effect by modeling flows confined along magnetic channels. We conside…
Spectroscopy of very hot plasma in non-flaring parts of a solar limb active region: spatial and temporal properties
Susanna Parenti, Giulio del Zanna, Antonino Petralia +4
In this work we investigate the thermal structure of an off-limb active region in various non-flaring areas, as it provides key information on the way these structures are heated.…
Magnetic shuffling of coronal downdrafts
A. Petralia, F. Reale, S. Orlando
Channelled fragmented downflows are ubiquitous in magnetized atmospheres, and have been recently addressed from an observation after a solar eruption. We study the possible back-ef…
Bright hot impacts by erupted fragments falling back on the Sun: magnetic channelling
A. Petralia, F. Reale, S. Orlando +1
Dense plasma fragments were observed to fall back on the solar surface by the Solar Dynamics Observatory after an eruption on 7 June 2011, producing strong EUV brightenings. Previo…
Time-resolved emission from bright hot pixels of an active region observed in the EUV band with SDO/AIA and multi-stranded loop modeling
E. Tajfirouze, F. Reale, A. Petralia +1
Evidence for small amounts of very hot plasma has been found in active regions and might be the indication of an impulsive heating, released at spatial scales smaller than the cros…
MHD modeling of coronal loops: injection of high-speed chromospheric flows
A. Petralia, F. Reale, S. Orlando +1
Observations reveal a correspondence between chromospheric type II spicules and bright upwardly moving fronts in the corona observed in the EUV band. However, theoretical considera…
Thermal structure of hot non-flaring corona from Hinode/EIS
A. Petralia, F. Reale, P. Testa +1
In previous studies a very hot plasma component has been diagnosed in solar active regions through the images in three different narrow-band channels of SDO/AIA. This diagnostic fr…